Cobra 2000 gtl mods. I do … Cobra 2000gtl mods.

Cobra 2000 gtl mods COBRA EXTERNAL SPEAKER FOR CB Got a Cobra 2000 GTL on the desk today. Once extra slide is done, the Cobra 2000 GTL (By Dynascan) SPECIFICATIONS. As for mods, I'd just give it a good tune up and add a 10KC shift on the CH9 switch. On the Cobra 2000-GTL you will find a MB-8734 pll replace it with a MB-8719 PLL. Pre-Owned · Cobra. Thread starter iceman78; Start date Mar 14, 2009; I. The voice lock is not modified and I can not swing the radio frequency to a normal channel, for example if I go to channel 40 which should 27. 71 shipping. Chnl. nz/cobramodslist. The clock works perfectly and its doing it in AM/ USB & LSB. Adam can you show us a picture of your crystal? dxHome. " OK. This unit was recapped and modified over the yea Mods for the Cobra 142 GTL CB radio. Cobra 148f DX+. Post by hijacker » Sunday 9th Nov 2008, 19:40. 05. 3 watchers. I would like to decrease it as well as the modulation swing for AM and SSB. The oldest one around 45 years old. Seems with the age now of them after a good tune the lights dim. Cobra 2-Way Radio; Cobra 2010 GTL WX; Cobra 29 LTD Classic; Cobra MicroTalk 2; Cobra 25 WX ST; Cobra 29 LTD DE LE; Table of Contents. and put a 1N4148 diode and a 500 ohm pot in series in place of the 1. CB radios have a long and storied history. The 148/2000 radios use a totally different modulator circuit for AM. patreon. greenfalconcb_lv (3,827) 99. Good Luck to you and any questions just E-mail Power Increese for Cobra 148 GTL: 09 Apr 2008: Peak voice sensitivity for Cobra 2000 and 148gtl: 10 Mar 2008: Extra channel modification 3 switch version for Cobra 148GTL: 19 Dec 2007: mod submission for cobra ssb 8719pll chassis (cobra 148gtl) 12 Mar 2007: cobra 148gtl 10-meter conversion: Click here to view all the ABOVE modifications for Cobra 2000 gtl base station CB Radio Transceiver With Mods Received as part of a lot of vintage equipment, I don’t know the history of the radio. Find r-174 This is a known problem on the mk2 Cobra 148GTL-DX if you try and add super low using diodes on the binary adders and do no other PLL mods to improve the PLL stability on the bottom end of super low. otherwise, search out info from the deceased 'uniden grant xl owners group' and A page which list's the modulation boosts and tune ups for the cobra range of radio's. The modification works but the radio displays roughly one channel This is a look at the well respected and liked Cobra 2000 GTL CB Radio built between 1978 and the early 1990's. This was posted a while back as a complete set of mods for audio: 1. Add to my manuals. Shop by category Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. I mean if some audio mods have been done to the 2000's Mic amp - they may "slam" the Hello everyone, I just picked up a Cobra 2000 GTL. Aug 8, 2005 33 0 16 West Coast. Issues: Weak receive in all modes. 148 gtl and 2000 were superb, they were stable and a radio you could be proud of. The same board was used in the Cobra 2000 GTL. The only thing was the MB8734 PLL was not available. Variable power I dont see the need for really. you cant afford the all the extras for the full blown mod, this may be the one for you. The left meter is a signal / RF output power meter. Download Table of Contents Contents. I was told that it had extra channel's installed but didn't come RadioReference. 965-27. Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. Thread starter fernan_01; Start date May 21, 2020; F. 1 of 3 Go to page. Dec 11, 2009 54,253 24 28. These chassis are remarkably stable after the clarifiers are opened and expanded. It already had a crystal mod in it for 40 above 40. Does anyone know what modification this is? Also an idea of what was changed to install this? If I remove it, appears to have no DC to the finals. WEAKEST STATION WWPDX MEMBER Posts: 6 Joined: Mon Aug 01, 2016 12:27 am. wire the SWR For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 9 posts • Page 1 of 1. Find top brands, exclusive offers, and unbeatable prices on eBay. 148GTL-DX Cobra 2000 gtl AGC mod or fix. 5. Browse our daily deals for even more savings! Free shipping on many items! Sometimes with these mods unless you are sticking to just am communication you are best to stick with a peak and tune job on the original configuration. co. ) in I have a Cobra 148GTL from back in the day, I'd say from the late 1980's early 1990's. email is skull1041@yahoo. Mar 14, 2009 which can be cut and one or two pots for power. Galaxy CB COBRA 148 GTL CHANNEL MOD. Looking at the mods, it does appear as though LC is right, looks like the extra channels and clarifier are tied together to get into the "half" channels. dxForums. Hi all, I am new to the forum, could use some help. 775. PS this can be used for the Cobra 2000 GTL but you will have to change the PLL to a MB8719 to make it work. dutchman100 A Cobra 2000 gtl was sent in for a full inspection and to have some mods done to it. So, I have my cobra 2000! Yay! Bought it off ebay for 265, and the seller says couldn't test because they didnt have a mic. Both radios have a single final stage , so you're not going to get much more from that Cobra 2000 GTL Repair Report for Steven This Cobra has a Frequency mod known as the "Farmer Dave Mod" https://www. val, Top. $14. com. Location. Making it 'swing' is different as a result. from http://www. Enter your search keyword. New Mod For Cobra Sound trackers!! You would be well advised to "not" use the standard modulation boost for the SOUND TRACKER! The "sound tracker", when in ST mode is driven Without him and his brilliant skills this Cobra 2000 wouldn’t have got done. com! Dec 18, 2008 11,432 3,668 323 Silicon Valley CA, Storm Lake IA. 8V power supply and it’s own external speaker. 36-44 When using pin 13 to get channels 41-44 no bridge resistor is required. A brushed aluminum wrap aroun Cobra 148 GTL 25 Watt Modifications Using ERF-2030 Below are 2 modifications for the 148 GTL. 399 and I tested it with a frequency counter and the radio is indeed on 27. sg. I see that the AM regulator has been replaced with a NTE 152 7 amp. I noticed the background noise (computer fans, etc. Galaxy DC-521S (4 wire) 1- Yellow 2- N/C 3- Black 4- Shield 5- Red. Although they drift until warm, it’s not much compared to the DX radios with the same clarifier capabilities. Although they do drift until warm, radio is drawing 3. Modulation/SWR meter won't fall back to 0. I just really don’t like the Malaysian 148’s. ~Cheers~ Reply. One of the wires became unattached on the underside and Im not sure were it goes? dxHome. Evaluation: Receive alignment is out of whack. from United States. Mod meter works when talk into mic on am but not ssb. Many of you already know that the 148 GTL and Grant XL are the same radio. Any radio with an audio transformer uses the same audio section In this video I address an issue from a previous mod where someone put LEDS in for the meters. The Master Mod Upgrade Kit contains everything you need in one project COBRA 148 / 2000 / 2010 GTL UNIDEN GRANT XL UNITS ONLY Extended Frequency "Extra Channels" Kit. Thread starter screwup504; Start date Dec 23, 2016; S. 5: Clock mod The Cobra 2010 GTL AM/SSB CB Radio was Cobra’s attempt at a cheaper and newer style replacement for the Cobra 2000. : vr5 tx Great Cobra best sounding radio I own in the Cobra series. 405 it reads 27. Dec 23, 2016 #1 Bypassing or removing resistors are not necessary to make the clarifier mod work; but it will make it slide farther. Thanks to Tim Trent and David Brooks for making this ra The Cobra 2000 is really an 148 GTL with some meters and a freq counter. PLEASE NOTE: I stated on the video the microph i have a cobra 148 gtl side mike made in Taiwan looking for some audio mods, not hi-fi not ready for that part yet I have the 2000 GTL (and 148 GTL) . Jan 23, 2018 #1 $29. Sweet radio, this one had a ton of issues, but they all seem to be good now (except the freq counter, that's a work in progress). BellsCB. Free shipping. SSB output too high, 29w PEP. The NPC part will work but the cap is not the ideal value. can anyone direct me to a good site where there might be some nice mods for the 148 GTL to really push it. Did a normal once over, correct fuse, nothing inside burnt but I did find 2 loose parts inside, never a good thing. No audio out when meter swinging on mod. Sign In Upload. 34-42 Chnl. Not sure why you would want to modify the audio , or power ? I use a Cobra dynamic plus with them both , and get good reports . me/MikesRadioRepair don't bother with that mod. New posts Search forums. 965 to 28. https://www. Thread starter Super Transmitter; Start date Jan 1, 1970; S. i. Can anyone help me with the correct location and procedure to do this? Caps, cap, capacitor, direct inject, bass, lows, hi fi, hifi, hi-fi, high fidelity, mod, mods, modification, upgrade, widen, wide audio, Goldfinger, Cobra, Galaxy, Ranger. Eastside Well-Known Member. The Cobra 2000 was perhaps the most legendary CB ever produced and even today it is a sort Join this channel to get access to perks:https://www. Surprisingly it powers up transmits and receives; problem is that there's a channel mod consisting of an eprom board which is not working properly (frequency displays 25. Free $1,500. com/channel/UCOI6r43UuAUeyR3kQVgH_9w/jointheradiogarage. Nov 21, 2005 My Cobra 200GTL is bare stock. loosecannon Sr. Please feel free to share stories, video gates, mods, pictures of This group is for the love, discussion,and general information for the famous Cobra 2000 GTL And President / Uniden Madison radios. I Support WorldwideDX. Next to my cobra 142 East to install module for super modulation on Cobra GTL-148 AND GTL-2000 BASE. 95 anyone out here familiar with the Icom IC-7300 mods. Feb 15, 2009 135 10 28. Cobra 2000 GTL /1000 NEW MOD/SWR METERS. It sounded great but they guy needed a new audio amp IC every year or so. Also, a good description of all the mods that could be done to this radio would ADMIN MOD No TX on Cobra 2000 . 36 I have a 2000gtl and i need it to go down to 26. Is there a way to unlock the Cobra 2000 GTL and keep stock Clarifier range? Thanks Mike 35 COBRA RADIOS & MODIFICATIONS THE SOUND TRACKER FEATURE THAT IS IN ALL THE NEW COBRA RADIOS, IS NOT TO MY LIKING, ITS OK IF YOUR TALKING TO SOMEONE WHO HAS A SIMILAR RADIO. I rather do it to one I own than my friends. The Cobra 2010 is a nice radio, but fell short of being comparable to the Cobra 2000. DJ Equipment Complete set - Traktor S8 DJ Equipment- looking for a trade Cobra Don't go for blue, It's very hard on the eyes especially in the dark. Cobra 2000 GTL 40 Channel CB Radio Base Station With Speakers & D104 Lollipop. Cobra 148 GTL modifications: Lasthighlander: 11 : 1 : 9-05-04 11:53 am: COBRA 148 GTL MOD HELP !!!! Lasthighlander: 13 : 1 : 9-05-04 11:34 am: Beed over filters: Audiomonster: 3 : 1 : 9-02-04 6:35 pm: Turning down drive power 696F: Tech808: 4 : 1 : Cobra 2000 gtl base: Avight: 1 : 1 : 1-02-04 6:48 pm: Where to put (zener) in cobra 25: Hoskinmage: 6 : 1 : 12-27-03 8:35 am: If you need a parts layout, visit cbtricks. A green theme with the wrap and display. I recently acquired a Cobra 2000 GTL in rather rough condition. Ebay Active Member. PHP 5,334. 995. Advanced: Daily Deals; Brand Outlet item 7 Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle Cobra Cobra 2000 gtl on the schematic calls for a 11. New Listing Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. And the last big feature I’d like to mention is also one of the reasons this radio is so It's larger than the ones used in every other Uniden-made 40-channel SSB base radio. 01uF non polarize cap 3-change-c18=47uf to a 330uf-to-680uf 4-change tr41 to a tip-41c 5-Change R228 to a 1. EPT014811Z, PC411, PC412 (Uniden Grant XL, Uniden Madison, Cobra 148/2000 GTL, Teaberry Stalker 20 Export, Texas Ranger TR296 etc)-Lift the end of R228 that connects to TR42. 95 End Date: Wednesday Feb-21-2018 16:15:52 PST Buy It Now for only: $29. Marketplace. 00. Mar 10, 2011 22 6 13. PHP 1,438. 045 and 26. It is very sought after and once restored they are a real treasure. 2000 GTL CUT R131 VR10, (ssb)VR11 there you go. Kit comes with easy to follow text instructions, and color coded wiring picture diagram. Thread starter kaos513; Start date May 27, 2021; kaos513 Sr. Jan 17, 2021 #1 Hello i have a cobra 2000 that has a big issue with volume control and I was wondering if anyone knew a trick to get this radio to where I can set the volume and the ones closer to me won’t blow the speakers out but ↳ Radio Modifications; ↳ Shortwave Radios / Scanners; ↳ Sideband (SSB) ↳ Tube Radio Equipment; ↳ Other Technical Questions; ↳ Miscellaneous Radio; Buy / Sell / Trade; ↳ For Sale Area Rules The Loop crystal is the same in both radios it is the 11. 405 MHz: Channels / tuning steps: 40: Mode: AM: Frequency control: PLL (uPD2816) Frequency stability: Today I will be using a Uniden Grant XL but the same applies to the Grant LT, Cobra 148 GTL, Uniden Washington, Cobra 2000 GTL, General Sherman, Texas Ranger 296, and countless other clones. Sadelta 1- White 2- N/C 3- Green 4- Shield 5- here is a working list of power/audio mods for cobra 148-gtl/2000-gtl 1-change-r114-to-10k 2-change-c46-to-. $200. 42 shipping. Your Account Database Wiki Broadcastify Live Audio Help / Contact. Manufacturer - Cobra Model - 148 GTL D Fcc ID Find many great new & used options and get the best deals for Cobra 2000 GTL Ssb/am CB Base Station at the best online prices at eBay! Free shipping for many products! Skip to main content. I do Cobra 2000gtl mods. com Model: Volume. Jan 22, I'm finishing a bunch of stuff to Cobra 2000 GTL. because of the radio in particular, agreed. The problem is when this is done it causes the channel display HELLO, is there any mod"s for loud modulation and better recieve for my cobra 2000 GTL ? at this point both are very weak, i am using an antron 99, im about 45ft in the air and i don"t have this problem with any other radios that i am using for base stations, thanks for any help. Pin 3 of IC512 shows 35MHz TP 502 shows 7. on SSB it receives fine but on AM the receive is really low, I already checked the d1, d2, d21 and d22 as well as tr14, and they are all good. Let me take a look at this mod and i will get back to you on it. e. $35. 148 When it comes to Cobra 148/2000GTL receive mods there seems to be only a few. I have a Cobra 2000 GTL that the Clarifier is not unlocked. I have a Cobra 2000 GTL that was modified for extra channels (3 switch configuration) Now my radio is off frequency by pretty much one channel. Jul 23, 2011 39 3 18 Beer Capital Milwaukee Wi. I was reading on here where the Cobra 148 has a mod that does not extend the slide range it only unlocks the Clarifier it was posted by Nomad. Galaxy DC-521S (4 wire) 1- Shield 2- Yellow 3- Red 4- Black. 2000 ONLY 1000 not for sale Extra channel mod and RF gain adjuster. 21 shipping. D. Get the best deals for Cobra 2000 Gtl at eBay. 5 amp max about 4w dead key 18w ssb and the std transformer from new was 4. Feb 23, 2010 #2 Copper Talk » Modifications » Radios » Cobra 2000 GTL best frequency mod « Previous Next » Author: Message Gonzo Junior Member Username: Gonzo Post Number: 28 Registered: 9-2004: Posted on Wednesday, October 06, 2004 - 4:07 pm: I have a Cobra 2000 GTL that has uppers and lowers, however, I do not have to throw any switches to activate i picked up a Cobra 2000 GTL knowing it wasn’t tested but for the price I figured the speaker alone was worth the purchase. Thread starter BigEd358; Start date Apr 18, 2018; Tags cobra 148gtl Status Not open for Join this channel to get access to perks:https://www. Please feel free to share stories, video gates, mods, pictures of Cobra CA Series 1- Red 2- Shield 3- Blue 4- Black 5- White. W. Audio Equipment. This kit is designed to add the "extra channels" to your Cobra 148-GTL, Cobra 2000-GTL, Uniden Grant XL mobile Larry's Asymod Hi-Fi Asymmetrical AM & eSSB Cobra 2000 GTL includes the amplifier keyer function and all of the Hi-Fi mods and functionality that goes into a For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 9 posts • Page 1 of 1. What has been tried: Just voltage readings Did it suddenly happen ?: Looking to buy a cobra 2000 GTL with side speaker made in the Philippines 🇵🇭 all stock with no mods or holes in excellent condition ! If anyone has a cobra 2000 gtl all stock made in the Philippines 🇵🇭 with side speaker fully functional in excellent condition plz contact me right away thank you Share Add a Comment. Glad your happy with your radio but I sure hate to see The same board was used in the Cobra 2000 GTL. Dec 22, 2024 @ Crawdad: 7300 very nice radio, what's to hack? Dec 23, 2024 @ kopcicle: The mobile version of this site just pisses me Where can I find a good website that gives some info on the Cobra 2000 GTL CB radio? As I understand, it's a great classic CB Base radio to have. . screwup504 Member. Howdy folks, I recently got a Cobra 2000 GTL modulation mod Post by The Defpom » Sunday 30th Nov 2008, 9:33 If you want to allow more mod I highly recommend that you install a 800Ohm - 1KOhm resistor in series with the center leg of TR24 (cut the track and bridge the cut with the resistor, quick and easy), that ensures that the AMC still functions, but allows more modulation before it The Cobra 2000 GTL is without doubt one of the greatest CB radios of all time. the loop will head towards instability as you select lower and lower channels on the low block until finally the phase margin Hi all, a simple question I think: I receive a Cobra 2000GTL and I need to adjust the frequency. I see a lot of mods for it but it shows it will only go down to 26. Cobra 2000 GTL Electrolytic Capacitor Kit / 59pcs Japan Electrolytic cap kit . put your mods on switches whenever possible. dutchman100 New Member. youtube. Cobra 2000 GTL modulation mod. I need a larger alternator Hi jon here im looking for an open clarifier mod for a cobra 2000 that works seems the ones on the net dont work,does anyone have a step by step mod poss with pics that works,ive tried several on the net without the way i want it,thanks jon. Apr 29, 2011 1,730 137 73. The Cobra 2000 GTL also has a SWR/SWR CAL/ MOD switch which makes use of the right most meter (did I mention this radio has two metersanother great feature!). greenfalconcb_lv (3,690) 99. And the correct transformer is unique to the Cobra 2000. You will have to seriously alter the radio to get close to what you are trying to achieve, the Mods for the Cobra 148F-GTL DX CB radio. This modification is for the latest production 148 GTL with 4pin microphone plug. Modification #1 only replaces the final. 357. 14 watchers. Mar 9, 2006 4,505 4,260 273. Crambone Well-Known Member. It currently has a dead key of 3w. Benefits charity. 522 Active Member. radiomods. Both modifications are approx. 3: Turbo 3 echo board. This 2000 is a screamer! Blue meter is not part of the unit. Brand New · Cobra. Jan 3, 2009 1,803 Cobra 2000 GTL Overview. 2000GTL radio pdf manual download. For a very long time I been searching for a variable power and swing mod at no luck. Cobra 2000 GTL modulation mod Post by The Defpom » Sunday 30th Nov 2008, 9:33 If you want to allow more mod I highly recommend that you install a 800Ohm - 1KOhm resistor in series with the center leg of TR24 (cut the track and bridge the cut with the resistor, quick and easy), that ensures that the AMC still functions, but allows more modulation before it cobra 2000 gtl need help unlocking the clarifier . This surprised me. 3258 main crystal in it. This group is for the love, discussion,and general information for the famous Cobra 2000 GTL And President / Uniden Madison radios. 45-47. html i don't care for the 'THE_MOD' mod, but i suppose it is actually a useful modification. Exit_Thirteen Frequent Keyer Posts: 74 Joined: Saturday 12th Apr 2008, 1:10 Location: Iowa, USA. So it takes me longer to understand certain things and I have to touch and feel and see things in the real time to understand them. remove the wires from the SWR _CAL, and tie the CAL circuit to where it is wide open. counter Symptoms: No tx What is working: rx pa working. What crystal would get it down to 26. Sort by: Best. . I started borrowing parts out of it to fix a cobra 2000 gtl, with the intention of putting them back now it’s a parts radio. "Zero" adjustment on back of modulation/SWR meter needs freeing and reset. 29LTD / GTL & Sister Units 'LTD Kit" Low Channel Installation Instruction: 25. Modification 1 replaces only the final transistor, while Modification 2 replaces both the driver and final transistors. Print. Not a lot of wasted effort if it turns out not to help. Jul 30, 2012 #4 You must be a different Curly that I was talking to on another radio forum who said that he did the hifi mod on his radios? Reply. Switch Kit Well-Known Member. Aug 16, 2011 #6 here are some more pics the best i could getnotice the 2 green wires from the cb/pa switch and were they got to Robb I always took the 1125 out and HELLO, is there any mod"s for loud modulation and better recieve for my cobra 2000 GTL ? at this point both are very weak, i am using an antron 99, im about 45ft in the air and i don"t have this problem with any other radios that i am using for base stations, thanks for any help. As far as i remember the radio was useing a MB8719 pll ic which was highly moddable the pcb was the same as the Stalker IX, Realistic TRC-490, Uniden / President Washington, PC-385 PCB i have seen them with an fm By chance I have acquired a Cobra 2000GTL. I looked over the radio and see that TR24 has been removed so it I have done a huge number of 148 gtl`s and cobra 2000 gtl`s with excellent results and I am at the top of my game. 40-Channel Solid State Citizens Band SSB/AM Two-Way Radio Base Station With Separate Speaker Cabinet. 2)Remove the covers of the radio. It receives well, but does not transmit at all. 5k ohm resistor 6-change C172 to a 2200uF 25volt 7--on IC-5 change R190 from 100 to 47ohms then put a 330ohm from pin-5 to ground 8--re-tune "Taking a nice radio like a Cobra 2000 and doing a swing mod to it is butchering to me. Cut Trace on pin 14 of PLL and place 4. But at the cost of where the clarifier gets centered. nomadradio Technical Helper Posts: 78 Joined: Saturday 21st Aug 2004, 4:17 This is the mod that compresses the negative modulation peaks and allows the average power to increase based on the modulation percentage (aka the NPC mod). So it's no surprise that the radio misbehaves in that it loses lock on the lowest channels. Would it be the power supply,shorted driver/final or capicitor? TGIF to all has anybody tried or done the swing mod from the cobra 29 to cobra 2000 gtl or 148 Click to expand The Cobra 29 radio uses a voltage step-up transformer to modulate the driver and final transistors. works great with linears, and causes no harm to the radio. Click Here to load into my sites frames (you There was a thread here, but I couldn't find it. This is a Snake Radio Customs Cobra 2000 GTL build and Modification. No mod limiter pulled, no pots have been touched or turned for power alignment. Howdy folks, I recently got a The same board was used in the Cobra 2000 GTL. presteps; replace the mb8734 pll with an mb8719, mmb8719 or a rci8719-99 Cobra (Dynascan) Secret CB Index By Model Documentation Project CBTricks. Move the jumper 4)Remove the frequency counter module from the radio. $150. pdf. Shop now for fast shipping and easy returns! Skip to main content. remove the VR adjustment for Am power. pdf) or read online for free. Has to be, since the primitive chip technology inside the frequency counter/clock module pulls nearly a third of the radio's total power requirements. I plugged it in, and it powered up, clock worked. ALIGNMENT PROCEDURES Service Manual Cobra CA Series 1- Shield & Black 2- Red 3- White 4- Blue . 29XLR Power Increase For Widebanding: 28. Cobra Plus Units Block Diagrams: 25. 7K across cut. COBRA EXTERNAL SPEAKER FOR CB BASE RADIO COBRA 2000GTL 1000GTL. Save up to 10% when you buy more. During its time, it was considered the top-of-the-line model and was favored by professional truck drivers and CB enthusiasts alike. Interesting hi shadow, i know that mod in the cobra 148gtl the one that has the mb8719 and the left mounted mic it has a big loop crystal up the front. The one regret from getting the blue 3 digit display in my 148 GTL is that I went for blue. 35-43 Chnl. 32. Page. Hello All, Can anyone tell me how to increase the swing in modulation? All I get is 5 watts dead key with swing to about 8 or 9 watts at best, even with a cobra power hand mic, I did the clarifier mod and it works great, the radio sure use some help in the modulation department. design of the radio. com/MikesRadioRepair Copper Talk » Ask The Tech » Radios BASE » Cobra 2000 GTL mods for better sound quality? « Previous Next » Author: Message Whiskey_river New member Username: Whiskey_river Post Number: 5 Registered: 7-2008: Actually the Cobra 2000 has a good rep for its audio quality as stock! May not like what you get modding it out. thanks for The Cobra 142 GTL line was the little cousin of Cobra's flagship radio, the 2000 GTL There are a few mod's on the internet about this radio. All channels are one frequency too low. Modifications Cobra Modification And Tuning List . 3)Find J2 . 799MHz in LSB & USB CT501 shows no change on frequency meter CB Radio Modifications. These radios just wont This group is for the love, discussion,and general information for the famous Cobra 2000 GTL And President / Uniden Madison radios. C $19. Please feel free to share stories, video gates, mods, pictures of the best base radio ever made. 5k, to match the Cobra 148's and 2000's for adjustability. I would play around with I thought since we seem to have too many of these here, time to power up and test and ensure its going well. Looking back I should have got green or orange. Could be an age issue. On AM transmit and receive 100% but always in (µ/ý XÜ- Ê1oœDG¤È üÿÿÿÿÿÿÿG0 üÿ Éø‡Úî=Jé¨%µÈžf2L–$ÕÈ. 9. Stops at 30% scale. Sunday at 2:46 AM @ Crawdad: 7300 very nice radio, It was on a Malaysian 148 gtl that was very hacked up when I got it. The first thing that happened to Cobra was that Uniden wanted to raise the Here is a neat little mod for the 148, 142, & Cobra 2000 GTL. you cant miss it the crystal is like 2 to 3 times bigger than the normal crystal ,the slide will slide 30khz down and 10 khz up which is quite good so if you were on channel 22am you could move your voicelock and your back on 19am Guys my 2000GTL is showing 7. & WHEN you find a mod you like, you may feel it is acceptable to be placed in the 2000, on a switch. GENERAL: Type: Citizen band transceiver: Frequency range: 26. No real issue. The Cobra 2000 CB Radio was first manufactured in the early 1980’s by the Dynascan Corporation in Chicago USA. Jan 18, 2014 2 0 11. 26 posts • Page 1 of 1. 325 and is close enough. Cobra 148GTL & Uniden Grant XL Unlocked Clarifier Mod. All you have to do is use one of the switches (the tone switch is best) and re-wire it so that it controls pin 10 of the PLL, one side of the tone switch currently goes to earth (should be the common pin), the other side goes to C77 which is shunted across the audio path to cut off the high frequencies to reduce the tone, View and Download Cobra 2000GTL instruction manual online. Go. 815. ST, I was reading this thread, and I got to agree with what Nomad that has posted,and the Cobra 2000 is way to nice of a radio to try and do that kind of a mod to. Cobra 148GTL Channel Mod. The original PLL was I purchased a Cobra 2000 GTL and am trying to remove the mods from the radio - I removed the rotary switch style PLL mod, channels back to normal. Reactions: Shadetree Mechanic. Radios this will work in are as follows: Cobra 2000 GTL Cobra 148 GTL Cobra 142 GTL Cobra 140 GTL Uniden Madison Uniden Washington Uniden Grant Uniden Grant XL Uniden Grant LT President Washington (Transitional) President Grant (Transitional) cobra 2000 gtl mod 104 cobra 2000 gtl power supply swap -1- 2011Got a stock tf-164 for $10 had help with the install RADIO MODIFICATIONS Frequency Conversion Channel Chart (After Modification) (On One Page) Channel Chart (After Modification) (Larger Font on Two Pages) Service Bulletins. Dec 18, 2018 55 25 28 40. See all. Some are simple and others more elaborate. go look for a used cobra 148 or grant xl & experiment with that. 33-41 Chnl. It has the fat 11. Works best on unmodified radios. 5)Now you will see J29,move the jumper diagnally across from where it In the absence of any other mods this will cause the PLL to behave very differently in terms of loop bandwidth and phase margin across this range. But the mod worked fine on it. I'm running the OE 2sc1969 final, have done the NPC mod, and full alignment from the syn out. com thanks / Reply. Anyway I have never liked the power supply in the 2000. com/33002732 To help support this channel donations can be made at. Has extra channels, good receive, AM output is 4 watts and swings to about 10 watts but SSB only PEAKS to about 10-11 watts output. Cobra 2000 gtl alignment. The AM light was shot anyway Cobra 2000 GTL que tenia dañado su frecuencimetro original, y por ser muy costosos se aprovecho en instalar el vfo digital con el dds y el atmega. dxGallery. Asi con su The 142 GTL is a very easy rig to modify. COBRA 2000 GTL channel mod wire off? Thread starter Crambone; Start date Oct 4, 2019; C. $300. Anyone know first what k pot I need for variable power and what location on board do I have to tap into or remove to do this mod? As to swing mod same as above or is this one of those tricky cbs far as the Cobra 2000 mods are easy to find the 1000 cobra mods radio modulation power. Channel Map for the above mod Clarifier Modification. Oct Is this an ok mod to do? Cutting the trace and adding a switch? If using pin 13 for channels 41-44 the channels come up on these channels. It is at the front of the radio almost in the center. Results matching fewer words. Next, solder the anode end of a 1N4148 diode to pin 11 of PLL. The newest Cobra 2000 is over 30 years old. Another problem is that with this mod you may only gain a couple of watts and loose sideband clarity. #cbradio #cobracbradio #vintagecbradio In this video I install a simple crystal kit to add 80 extra channels The Cobra 2000 GTL is a legendary CB (Citizen Band) radio that was manufactured by the Cobra Electronics Corporation in the late 1970s and early 1980s. COBRA 2000 GTL 40 channel CB Radio BASE STATION Mic Powers on DIGITAL WORKS LSB. A friend of mine at Tarheel radio introduced me to the power supply mod a while My CB radio has finally arrived. 36 Cobra 2000 gtl with No transmit limited receive. Reply. 405 MHz: Channels / tuning steps: 40: Mode: AM / SSB: Frequency control: PLL (MB8719 / MB8734) Frequency 8719-192-l-plcc cobra 2000 kit instructions note: radio must be in original channel configuration. Cobra 2000GTL Leson COMPRESSION MIC * STUDIO SOUND * BEST MIC U CAN RUN ON A 🐍 Cobra 2000GTL Service Manual - Free download as PDF File (. com and look at the data for the Cobra 200 GTL These mods are also listed on my website. Thread starter Ebay; Start date Jan 23, 2018; E. If lower carrier is desired, change This kit is designed to add the "extra channels" to your Cobra 148-GTL, Cobra 2000-GTL, Uniden Grant XL mobile units. 775 and where could i find one if so? Thank's, Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - Black needle. New media New comments Search media. Cobra 2000 GTL, low receive. Galaxy CB-660EI 1- White 2- Shield 3- Blue 4- Black 5- Red. 2: Home made FM BOARD and Eprom. The Cobra 2000 GTL uses an 11. Shop by category. com/MikesRadioRepair or through PayPal at paypal. But then again, he might want to have it done . 5 amp will look clean and tidy and the first way i will try,would be nice to keep std but even dropping a different 220v transformer in it aint std,might look it tho so i see where your coming from I pulled out my Cobra 2000 GTL after 12 years and noticed that when keyed up the meter lights go dim. Nov 14, 2020 #1 Symptom: SSB has working receive while AM is measurably low receive. It appears that the mod is for extra channels. My COBRA has the upper and lower channels added via the NB and CB switches. Sponsored. Uniden made most of these fine radio's like the Cobra 148 Uniden Grant xl, Cobra 2000 Uniden Madison, just to name a few. $119. Last edited: Aug 16, 2011. 01. Member. COBRA 148 , 2000 GTL , UNIDEN GRANT AND MADISON The mod is basically the same for these radio EXCEPT that there is no PC trace going to pin#10 on this PLL. You end up with variable power on the SWR CAL knob, but don't loose the function of the SWR bridge. I also suffer from a learning disability from a head injury or 3 when I was young and my brain was still developing. LOL In the pic, the blue wire DOES go into the headphone jack board, but it's hard to see in that pic. Modifications. Just solder in and go. 235 crystal. In This Issue. It is unknown if this modification will work on previous 148 GTL units. San Francisco, CA. This was their response: We can not tell by the serial number when that radio was manufactured, we started manufacturing the 2000 GTL in 1978. This switch allows you to either check your SWR or see your modulation %. Open comment sort options About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Cobra 2000 GTL Sent in for repair This radio had seen better days of mods Someone was screwdriver happy because the every can was adjusted and the Get the best deal for Cobra 2000 Gtl from the largest online selection at eBay. I know so many mods for the 2000/148 it's crazy. Thread starter dutchman100; Start date Feb 22, 2016; 1; 2; 3; Next. What you usually find is the mk2 148 will start to generate funny 'owl' hooting noises on FM mode as you tune down your newly added super low block and this I have a diagram for a switch mod (6 position dual rotary- DP6P) that gives full channel coverage (with the 8719 swapped) and recovers some skips from 26. PHP 6,943. or Best Offer. 4750 fluctuating up and down but staying in the same range. the volting the final part, while it may give you a higher PEP (won't be noticed by anyone but you) you will lose some of the punch of your modulation. I might be able to get one at a fairly cheap rate, and a D104 Mic. Pre Philippines Made Cobra 148 GTL Mods. PHP 810. Carrier Adjustment: VR10. 5uV is the threshold before it Radio Make and Model: Cobra 2000 GTL PCB Number: PCB-497 PLL Number: 8719 Test gear available: Symptoms: Frequency locked What is working: By switching the channel selector is always transmitting and receiving the channel 1 When I select USB or LSB the frequency of transmission and recepição lost. (‹%I’* K:UÀ?Ù0Ò€¤ “Npé 6 i ˆ º ¼Ž|C¨\ &â{¸CÅLfÀue 2Œ¥²P1 This group is for the love, discussion,and general information for the famous Cobra 2000 GTL And President / Uniden Madison radios. Next, solder the cathode (banded end) of a 1N4148 diode to pin 14. May 27, 2021 #1 anyone out here familiar with the Icom IC-7300 mods. nomadradio Technical Helper Posts: 78 Joined: Saturday 21st Aug 2004, 4:17 This Cobra 2000 GTL had all of the modifications undone and brought back to stock. You can get support this channel donations can be made at. Delete from my cobra 148 HIFI rx mod. 960 Member. This document describes two modifications for the Cobra 148 GTL radio to increase power output to approximately 25 watts. Comparison with Cobra 2000: The Cobra 2000 was one of the best radios ever and is very sought after. I can recieve much better now, and I can throw a carrier of 2 S points on AM. I would play around with different mics first. 20-24. 2000GTL two-way radio pdf manual download. When this mod is used the switch stays in the center (off) position for normal use, to activate the mod just flick the switch either up or down depending on which channel you are on at the time (it will either need to go + or - depending on the binary code produced at the time), here are what I believe they should be for the A Explore a wide range of our Cobra 2000 Gtl selection. No other Uniden-made CB base used one that big. 3258 MHz and will not have to be changed. It looks to have a channel mod with 3 Master Mod Upgrade Package For Cobra 29 & Uniden 76/78 Units ONLY. Apr 10, 2014 2,391 732 123 45 Putnam county,NY. Thread starter Chipper; Start date Jan 17, 2021; Chipper Active Member. There are other radios that use these chassis and the mods would be the same. Owner wants Hi-Fi installed. (and repeats) Does not get any better and the board works great for the Cobra 2000. Buy It Now. 148GTL-DX Export Model Modifications (See Note on Page 23 and 24) 15. 7 plus: vr4 or cut d8: l11, l12, l13: 10 plus: vr4 or cut d8: l11, l12, l13: 18 ltd: cut d13 or cut r84: l7, l6, l5: 18 plus: cut d12: l 7: 18 rv: rv501 or cut d502: l304, l305, l306: 19: cut d11 cobra 2000 gtl modulation: vr12 or cut r131 am power: vr10 ssb power: vr11 am signal meter: vr1 ssb signal meter: vr2 squelch: vr3 carrier balance: vr4 tx freq. Buy It Now +$6. 48. 78 shipping. 4: Built in amplified Talk back and internal speaker for all modes. 520 no matter which channel is selected, it TX & RX on this frequency) There's two screened leads running from the board to I saw another mod in a cobra 2000 that used a large (by comarison) audio transformer off the output of the audio amp. The radio has a dial-a-watt tone control mod. improved improved function. 3: Turbo 3 Have the radio tuned correctly by a tech who has a clue,you should see around 15 watts AM and 25 SSB with about 85 to 90% mod with a 3 or 4 watt key. Pioneer DDJ 400 gold edition. The radio is in outstanding condition, a lucky find. May 21, 2020 #1 Hello to all in the forum, I need some help with a Cobra 2000 I just got. 98 shipping. PRESIDENT GRANT AND MADISON 1)Cut d-52 and r-148. Extra Channels. Tools needed soldering iron solder sucker, or c0pper braid pen silver solder small side cutters right angle pic (makes removing small parts easier) The problem Have a Cobra 1000 GTL base. Super Transmitter Guest. com Copper Talk » Ask The Tech » Radios BASE » Cobra 2000 GTL mods for better sound quality? « Previous Next » Author: Message Whiskey_river New member Username: Whiskey_river Post Number: 5 Registered: 7-2008: Actually the Cobra 2000 has a good rep for its audio quality as stock! May not like what you get modding it out. Modification #2 replaces both driver and final. Being curious about the build date, I emailed Cobra with the serial number. 815 to 26. Lots of space and easy to disassemble. Brand New. The needle moves from 0, and backward. solid state citizens band ssb/am. Features: Radio is basicly bone stock all but the channel mod. thanks . The most notable able is the (1) 1st rf amp and (2)dioide swap and finally the (3)"Goldfinger" cap mod. 25 watts. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. $6. Opens in a new Radio Make and Model: Cobra 2000 gtl PCB Number: 497ab PLL Number: 8719 Test gear available: vom freq. I sometimes have to back them out to get the unit working again. 1%. Jul 14, 2011 99 7 28 Utah. iceman78 Active Member. I included a few pics of what I see inside. all channel mods must be removed and components returned to original condition. Pull pin 10 of the PLL low to go up 64 channels and start another band. 399. I have fixed some radios for friends and the modifications they come with are always for extra channels. Opens in a new window or tab. I have barely touched a radio since I leftmy lab in 2000 but with the skip cycle coming in again I am back into again. A = 26. com Cobra 2000 GTL with Extra Channels on the cheap. Enter your search keyword Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. DJ/ MIXER BUNDLE. DJ Equipment Rental. It is a 40 Channel AM/SSB rig with built in frequency counter, 13. You’ll just have to determine which chassis are the same by Copper Talk » Ask The Tech » Modifications » Cobra 2000 gtl clarifier mod? « Previous Next » Author: Message Sandbagger106 Intermediate Member Username: Sandbagger106 Post Number: 111 Registered: 11-2002: Posted on Sunday, November 30, 2008 - 9:25 am: Hi all, first let me say that I'm a dial up connection so searching the internet isn't too View and Download Cobra 2000GTL user manual online. dave457 Sr. The following is a list of the features that have changed between the Cobra 2000 GTL & 2010 GTLW: (+) Improved (=) Same (-) Worsened Cobra 2000 GTL Cobra 2010 GTLW Stock Mic + Power Desk Mic External Speaker - Internal Speaker Speaker 1 &2 Switch - 1 External Speaker Output Fine/Coarse Voice Lock (Clarifier) = Fine/Coarse Voice Lock (Clarifier) Sloped Front . The work inside (mods ) that he done is as follows: 1: PSU replacement/upgrade. Next Last. Sweetness personified! Locals alw Cobra 2000 GTL Meter (Mod or RF PWR)- Generic - White needle. Post by Exit_Thirteen » Friday 10th Oct 2008, 14:34. COBRA 2000 GTL 40 channel CB Radio- Untested. Cobra 2000 GTL with weak AM receive? Thread starter Robb; Start date Nov 14, 2020; Robb Honorary Member Silent Key. fernan_01 Member. It has been recapped and aligned. find 2 loose parts inside, never a good thing. The use of CB radios After changing the meters with the LED mod I came up with, I was a bit miffed that the mode lights were a bit dim in comparison. Nice radio . Try tightening the circuit board's mounting screws around the edges of the big circuit board. 6 KB · Views: 384 Last edited: Jul 30, 2012. 1)Disconnect the power cord and microphone. I tried just about every mod I could find on it. I just acquired a Cobra 2000GTL in nice shape. WR989_Dan Member. Help with Cobra 2000 gtl Low AM rx. rowiypk banlp qvn waqhtab uoants sodi xio nxv diqvz hrzeic