Cobra 25 ltd classic mods. 5 watts dead key with swing peak 5.

Cobra 25 ltd classic mods Apr 6, 2005 · Cobra 25 ltd classic 1969 mod. You could look over to the left and click on "Modification List" compiled by the good tech808 Lon. Cobra 29LTD AM/FM. 5w carrier and about 16-20w peak with clean loud audio. That radio should sound fine at 100% modulation. Now compare the circuits and mod away using the EKL paper as a reference, of course some values will not be the same, and the reference designators won't match, but i'm betting it could be done from comparing all three papers without much frustration. Sep 23, 2021 · Cobra 29 classic LTD/GTL low channel mod. Sep 24, 2021 #2 I think he means this: 25gtl/ltd/classic CUT D9 Change R76 to a 1k resistor Change R43 to a 2. A properly tuned radio should be loud but also clear. not a drop in replacement for SSB gear. I have a Vietnam made cobra 29 Ltd classic. Cap with 50 to 100 ohm 1 watt resistor. Il s'agit notamment du connecteur de microphone en façade, qui facilite l'installation dans le tableau de bord. Jul 1, 2006 · I recently picked up a cobra 29 for 20 dollars from a co-worker. 148GTL-DX Export Model Modifications Mar 18, 2013 · The WorldwideDX Radio Forum was originally established in 2001. izzyd73 New Member. The TIP120 mod just pinches the carrier off and keep alive mods still produce harmonics. I am a little surprised that the uniden is the same, it goes to figure that the little pcb in the uniden is just a relocation of some portion that is put directly on the pc board in the Cobras. The mods for that radio will appear. 0 watts peak on Bird Termaline Relative Output Wattmeter/dummy load. Consult your COBRA dealer or a 2-way radio technician for help in locating the Apr 8, 2006 · I've been reading up on peaking and increasing the modulation on this radio and have a few questions. He says he has tried all the usual suspects like cbtricks. Dec 8, 2013 Working on your own CB - adjusting the modulation ** Warning performing modifications on a CB radio can be a violation of FCC regulations. After a complete tune up/upgraded final/mosfet/etc, See the attached PDF. If R1 is 68 ohm, will give a Carrier of about one and a half Watt Dead Key and an Audio Swing of about 12-14 Watts PEP. SSB Sig Meter. Happy Holidays Chris Lastly, the 25 LX includes a redesigned ergonomic microphone for easy and comfortable use. First Feb 11, 2021 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Cobra 25 & 29 LTD Super Modulation If you want to keep the carrier reasonably high (no AMP) make R1=33 ohm. So if your radio is newer - it uses a DIFFERENT audio chip - the one shown earlier. Dan. I am trying to "restore" this back to normal so I can proceed with an alignment and tune. Hope you Jul 14, 2023 · I am working on a Cobra 25LTD Classic that has been modified in the past by the previous owner. Thread starter dss56; Start date Sep 23 Dec 25, 2017 618 1,061 153 60. Top. Gimmick type modifications such as super mods are not offered at Clays Radio Shop. AM Signal Meter. Remember to subscribe !Give this a Thumbs Up if you like it, it helps to grow the channel, also please share the video with your friends to help the channel IRF520 Mod rocking the Cobra 25 LTD Feb 4, 2007 · I have done the SC2999 and 1N6263 mods in my Galaxy 95t2 with good results. How can I get it to swing the whole 6 watts? What would be Cobra 25 JP6 L11 Cobra 29 JP36 L15 Uniden 68 JV17 L11 Uniden 78 JV101 L15 Jumper & Coil Part Number Notes: Drill a hole in the back or side of the radio to mount the Variable Power Pot. You'll often hear people say on the radio that Cobra Mods Radio Modulation Power. But when you have your radio connect to a base antenna you make any different. Bigmic91 Newbie Bigmic91 wrote:What is the best way to do a talk back on a Cobra 25 LTD Classic (wired inside the radio so that when you talk you can hear yourself. Cobra 29LTD Classic Tune up Report for Stephen in OR on 2-19-21 --- RX Improvement Modification --- Mosfet Final change mod and tune. Jul 23, 2008 · Cobra 25 LTD Classic question? Post by Bigmic91 » Sunday 27th Jul 2008, 12:58. Thread starter Cutlass327; Start date Mar 15 Cobra 25 GTL/LTD/CLASSIC SAMS PHOTOS: 207 AM LIMITER: D-9 POWER TWEAKS: 1. USB Freq. it should be like 1 to 2 watts max. Radio . 2. 695, High Side injection into the 1st mixer). 8 volts leaving a remainder of 12 volts total input), but you can compensate by retuning for the voltage drop. Jul 4, 2004 · Romeo Foxtrot X-Ray DX Group Radio Mods this website gives the best cobra 29 swing mod i have seen gives you variable power down to 1 watt and 5 watt dead key with no swing loss u change caps a few resistors the 2078 final to 1969 and u add a tip 120 for your variable power good clean audio and swings very good Variable Power for Cobra 25 & 29LTD Cobra 29 LTD Classic Peaked and Tuned, mod/swing kit, Blue LEDs. Nov 1, 2005 · ok,,,to start with,,if swing kit is installed right,you shouldnt have a 5 watt dead key. it appears there are more than two wires on the switch. Mar 28, 2014 · This is a very clean Cobra 25. good for a driver in AM units like the 25 and 29, but is not a drop in replacement for SSB gear. Additionally it can be dangerous and may expose you to electrical shock, injury, or death. Come join the discussion about performance, engine swaps, modifications, classifieds, troubleshooting, maintenance, and more! Dec 22, 2010 · The 50 swing numbers on a cobra 29 are greatly exaggerated numbers they usually are associated with a meter like Dozy, Paradynamics, Astatic Etc. Peak it does 20. Now featuring dual-mode AM/FM functionality for crisp, clear communication and minimal background noise. Re-tune L14,L13,L12 for maximum forward power. 5. 5 watts by utilizing the channel 9 switch that I never use. #2 ~ Adjust L10, L9 and L8 for max RF output. Cobra 25 LTD Classic (Newer 4-pin front mike) SPECIFICATIONS. 7 ohm resistor Change R108 to a . The pic I've posted is when we initially got my Cobra 1000 in the 10m band. I suggest using the TIP transistor mod. Change R123(1 ohm) to a . Many possibil-ities exist and variations between vehicles require different solutions. I've been looking around the internet for some good instructions for doing the IRF520 MOSFET mod on the cobra 25 but have not been able to find anything other than the cbtricks ERF2030 instructions. Fixing to put in a cap and resistor mod and talk back with the resistor across the ext speaker and pa . so lets start over with that then ill give Jul 23, 2008 · Cobra 25 LTD Classic problem. Cobra a également fourni Feb 21, 2010 · TheCBDoctor wrote:Hi Big Ben, Welcome to the forum. All the way up it shows 6 watts. Aug 29, 2015 · Does anybody know how to do the 3300 cap mod. A. 8 volts off of the original 13. well I did a little research and found the 25 mod also for removing sound tracker. Now drivers can monitor continuously their radio’s RF output and battery voltage. The Cobra 25 LTD has a fixed audio limiter. 442built. Albeit there is nothing you can do with a Cobra 25 except remove/replace the modulation transformer, that's the bottleneck. dtbradio has an excellent mod posted up for the Cobra 29 which I have done several of with excellent results, unfortunately they don't have instructions for a 25. I'm currently evaluating performance and want to enhance my CB. We replaced the reverse polarity protection diode and tested the finals. Modifications. (Optional: cut D11 modulation limiter - NOT AMC: ALC: AM POWER. Some prefer removing a less used control knob and mounting the pot there. Variable Power w/ M-80 Super Modulator Swing Kit Built In ( FOR COBRA 25/29 & UNIDEN 66/68/76/78 ONLY) The V-MOD kit gives you all of the same options as the Classic M-80 Super Modulator kit, but, we have added the ability to manually control your radios dead key setting with a simple to install control module. It's a Cobra 25 LTD Classic, recently purchased, with the mic connector on the front. 47 Ohm. CB radios can easily be damaged when tampered with by an untrained individual. Thread starter Cheech; Start date Dec 8, 2013; Cheech Active Member. 1: change the final to a 2sc1969 Apr 3, 2005 · Cobra 25's started to use the 5-pin Audio chip soon after the introduction of the Cobra 25 LE - about 2016 or so. This includes modifications with performance upgrades, and peak & tune for your radio’s best potential. If a person is not getting good results then they should not be in any Jul 23, 2004 · Sorry do not know about the Dual Final Mod on a Cobra 25 but here is the Information that I do have for more power. The best thing to make noticed with this mod is when you have the radio installed in my car. Model. Then, I am to link wires from both sides of the 33 ohm resistor and run them back to Feb 13, 2010 · Also, since Cobra has many similarly named radios, I want to make sure I accurately conveyed which radio I'm talking about. Apr 19, 2018 · I do have the Cobra 29 NW LTD Classic, 2020 edition. Also new in the 25 LX is the industry’s first Radio Check Diagnostic. Factory Cobra/Dynascan 25LTD Parts List /Schematic Diagram CB Radio Repair Workman Cobra 25 LTD Classic Blue Front Mic CB Radio Covers Uniden. Would the mods be the same for all 3?? I just got the 25 Nw-St working and I just want to get all the power and modulation I can out of these radios. There are other Cobra 21s also. This shows how to troubleshoot the PLL and VCO loop, and how to determine whic Apr 3, 2004 · You asked for the Cobra 21-LTD and those are the power and modulation modifications for it. I want to hook up the talk back to the channel 9 switch. Aug 10, 2014 3 0 1 51. Mods for the Cobra 29 GTL, 29LTD, Uniden PC76 CB radios. Change R76 (3. Mar 15, 2009 · looking for info on how to do the IRF520 mosfet upgrade to a cobra 25ltd classic st. To adjust the carrier, or dead-key, adjust the slug in front of the final. Thanks for any input. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 245MHx is present at pin 4 (IC3) and check if 16Mhz plus this will depend on which channel your are on at pin 1 (IC3), the two frequency are mixed to give the output at pin 9 which should be 27MHz plus this will depend on which May 27, 2008 · MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). OVERMOD: Check for missing or cut D9, missaligned VR5. need info on the parts and the installation. Dec 16, 2006 · Just a change to 1969 final will show you 5 watts more but in order to get the most out of it you have to change the driver final as well as do a few other thing to really make it work. 7 PLUS: VR4 or CUT D8: L11, L12, L13: 10 PLUS: VR4 or CUT D8 25 LTD Classic: 1. ) The "Two Bands Mod". All 25 & 29 Models. Also applies to: Uniden 78 Cobra 25 & Uniden 76 mod is similar, although you'll need to cross reference against the schematic. I just tuned up a 25 WX NW ST the other day & I did it like any other 25 LTD, so I beleive all the mods should be the same. looks to me to be a stock cobra 25 ,,, no mods done just still factory shape,,,,,i Remove JP36. Aug 23, 2014 May 23, 2011 · Do a quick google search on cobra 29 mods or cobra 25 mods. every meter shows different readings. Perhaps the best of these improvements is the front panel microphone connector which makes in-dash installation a cinch. Dual-Mode AM/FM – Efficient communication while on the road just got easier. Feb 15, 2016 · Here is a little shot of the 04/90 Cobra 25 LTD Classic board. xx5's The 25 LTD has basic functionality with a traditional look and feel. I know it probably is not the THE "V-MOD" KIT. steveterry1 (2361) 100% positive; cobra 25 ltd classic; ford mustang cobra; speed cobra; cobra amp; Cobra 25 LTD Classic For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 2 posts • Page 1 of 1 Mar 13, 2019 · First of all I want to say hey , I’ve just joined up. Find which model Cobra 25 you have and click. Talkback added on a switch. I have some cheap equipment and I am a college student who is tight on cash so not many upgrades available. I do not want to use the RF gain knob to accomplish this. Apr 6, 2005 717 6 28 35 Medina county Ohio. ) Super-Slider VXCO "extreme delta tune". one process reads: cut D11 or adjust VR4 (mod) (I am not cutting D11) adjust L14, L13, L12 another process I read is: tune L10, L9, L8 for max power (discrepancy between the L Cobra 25ltd custom build meaning professionally built NEVER METERBAITED! YES WE SELL BRAND NEW RADIOS !! for service or quotes visit www. Bigmic91 Newbie Bigmic91 wrote:What is the best way to do a talk back on a Cobra 25 LTD Classic Oct 23, 2017 · Delboy Online, CB Radio, HAM Radio, DX-ing, Mods, Modifications, QSL, QSO, BLOG, DX Weekend, Legal SSB/USB/AM/FM, Mods, Modifications, News Aug 13, 2008 · The FM transmit audio is going into the BK4802 chip, which is actually an FM 2 way transceiver chip, in this case, only being used in the TX mode, for the Cobra 29 FM radios TX (direct frequency) and RX (offset by +10. Channel 9 switch to Channel 19: Cut D32. May 20, 2007 · Cobra 25 ltd wx channel mod Post by outlawmobile » Sunday, 20 May 2007, 16:15 PM Trying to help out a friend who's looking for info on putting extra channels into his 25. Cobra has also provided a nine foot microphone cord so that you keep in touch about anywhere in the cab. 5 This version was replaced by a newer, slightly different 25 LTD Classic. It's one of the most popular modifications to have done to your CB radio. The only really main difference in it from a standard 25 LTD is the Night Watch face & EL Driver / Dimmer Circuit, plus it has the Jan 8, 2009 · Since there are several models of the Cobra 25 ( LTD,GTL,Plus, etc) determine which one you have. Modification: Change stock final to a 2SC1969 Change C71 to a 33uf Jan 20, 2015 · About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright Jan 23, 2016 · I know some guy's remove the sound tracker section on the cobra 29 radios to get it talking better. Re: Cobra 25 ltd classic noise blanker problem. 2SC1957=driver. Then grab the EKL Mod sheet for the 25 . This radio is durable, reliable, and full-featured with 4 watts of power and access to all 40 CB channels. Even though the Cobra 25 LTD Classic has an automatic noise limiter, in some installations igni-tion interference may be high enough to make good communications impossible. Don't wo As Cobra's most compact Professional CB, the Classic maintains the exceptional performance, durability, and user-friendly controls as the 29 LTD. Oct 14, 2011 · cobra radios super swing mods cobra 25 ltd and gtl, uniden pc66: remove and replace tr1 w/2sc2999 d4 and d6 w/schotty on the cobra 25 and uniden 66, tr1 can be found near the rear of the radio in front of the heatsink to the right of the final and left of the antenna jack. Cobra® 25LTD Classic CB Radio features Jul 23, 2008 · Discussions on CB Radio Modifications. There's a couple of us from the local ham club who converted AM only CBs to 10. Cobra 25 LTD Classic problem. To disable the audio limiter cut C-70. Burned R89(15 Ohm 1/2 watt): Replace with a 1 watt. If you chose an Echo or a Recorder mod, I highly suggest this as well) $10 $15 $20 : Add a Small External Speaker (plugs into back of the radio for improved sound) $12 : Add a Large External Speaker (plugs into back of the radio for improved sound) $25 Apr 14, 2002 · I thought I'd post up a few extra details on the ERF-2030 mod for the Cobra 25/Uniden 66/68 since I haven't seen them floating around anywhere. Cobra 29 LTD Classic mods and alignment Modulation: Adjust VR-4 to show 95% to 110% on your external modulation meter. this is the mod I want to do 29GTL/LTD/CLASSIC Just turn up VR-4 for Max modulation, Adjust L17, L20, L21, L16 and L14 for max RF output. Equipped with advanced features such as Noise Blanker, Automatic Noise Limiter, and Dynamike for voice amplification, along with dimmer control, the 25 LTD Classic ensures an unparalleled Modulation: Adjust VR-5 to show 95% to 110% on your external modulation meter. Mod. I have a few 29's here and all i ever did was tune the radio to where i was seeing around 25 to 30 watts from. AM Squelch. The 2SC1969 final will get you about 40watts and the ERF-2030 will get you 50watts Bird. Burned R89(15 Ohm 1/2 watt): Replace with a 1 Jan 30, 2008 · Yes, the Cobra 25 WX NW ST should have the same mods as the Cobra 25 LTD CLASSIC. Dec 17, 2002 · Just curious if anyone could give me some info on Mods for a couple of radios I have. 1. This should help, I performed this mod and it worked absolutely great a smokin little 68xl gotta love uniden! email me for the picture diagram makes it much easier. There are alot of them out there that don't mention anything about cutting or removing the limiter. I added a 4700uf Filter Cap on the dc input then I added my little Voltage Regulated Dead Key Variable Control to it. Peaking Transmit Watts: While transmitting a steady voice tone, (AUDIOOOOOO for example) slightly sp Dec 10, 2010 · Got a spare Mylar? Polystyrene? Disc? Just unsolder the original 104 part, keep it, locate a 224 non-polarized (0. } B. Ce manuel appartient à la catégorie talkies-walkies et a été évalué par 2 personnes avec une moyenne de 6. cobra had so many inquiries on this they put out a mod to remove it. Feb 1, 2016 · this is the driver of choice when modding 25 and 29LTDs. Rat , May 24, 2011 May 1, 2016 · Cobra 25 WX NW ST mods. After replacement, the channel LED no longer lights. I had no deadkey or swing after I repaced Cobra 25 LTD Classic Schematic · Cobra 29 LTD Classic CB Radio · Cobra 29 NW Wx CB Radio Cobra 29 LTD Classic Mods · Cobra 29 Wx NW St · Cobra. Please don't copy and paste this mod to other sites/forums, but feel free to link to it. VR BY C44 Apr 18, 2019 · Thank you for watching this video on how to repair a cobra 25 ltd, CB radio. $300 Sound Tracker radios require that the sound tracker feature be disabled before any modifications. . However I have dropped $60 on a Cobra 29 Ltd Classic and I have two 5' fiberglass whip antennas leftover from when my dad was an over the road truck driver. Apr 29, 2005 · Ever time I have had a 29 LTD in for repair with on TX is has been the IC3 TX mixer. The radio worked good until I attempted a power mod I found. Hard to improve on it. (wired inside the radio so that when you talk you can hear yourself. A few segments of the second display digit now light intermittently. have not seen the mod for a cobra 25 as of yet. I am looking for the best mods to use on this radio. Description. On ebay people often will tell you that the radio they are selling has had a swingIt's one of the most popular modifications to have done to your CB radio. 5 watts dead key with swing peak 5. this mod will give you a variable dead key using VR4, the modulation adjustment VR. ↳ Vintage, Tube Type, and Classic Radios; ↳ Amps (Tube Apr 9, 2017 · Works on all cobra 29 radios, ltd and up. Out of the box , dead key was 3. Post by Rick » Saturday 23rd Aug 2008, 20:30 An easy to check the NB is to use an hair dryer or electric drill, close the antenna socket and try tuning L10 for minimum noise, if you put your scope on the base of TR22 you should see the NB pulse, if not check the diode D3 it may test alright but As Cobra's most compact Professional CB, the Classic maintains the exceptional performance, durability, and user-friendly controls as the 29 LTD. All the way down it goes to 1 watt. OR #3 ~ Power Modification: Jun 11, 2008 · I'm a newbie, with no knowledge, but I have a 25 wx st with the same problem, hance it was a free radio. I hope that this helps everyone out. I think these were the last of the Ti Made devices for when they were doing down hole oil and gas drilling electronics. Re: Cobra 25 LTD Classic Feb 16, 2023 · Classic CB Design – Cobra’s classic CB radio has been the standard of excellence in professional CB radios for over 50 years. Le 25 LTD Classic a suivi les conseils des professionnels et a apporté quelques améliorations utiles. Apr 16, 2007 · Hello I am new to the forums, and new to CB radio as well. I don't know much about the inner workings of radio's, but I do know how to solder and use a volt-meter. Cobra 25LTD Classic quantity. Might have to dig for it but you can start by clicking on their "Radio Information" link on the left side of your screen. I wanted to try out my new camera tripod (well, iPhone tripod) to see how it looks for doin Looking for a solid mod to change the dead key of a Cobra 29 LTD Classic from 4 watts to approx 1-1. TX Freq. Internally, the 29 LTD is based on the classic 29 LTD but with new FM electronics. If you chose an Echo or a Recorder mod, I highly suggest this as well) $10 $15 $20 : Add a Small External Speaker (plugs into back of the radio for improved sound) $12 : Add a Large External Speaker (plugs into back of the radio for improved sound) $25 Feb 18, 2006 · " The 25 LTD Classic is rugged professional full featured CB radio with professional-driver requested improvements. Including a YOUDA chip. Ce manuel est disponible dans les langues suivantes: Anglais. From 0-max dead key. The newer one I can't seem to get around 20 is there a newer mod for the newer style cobra 25 Feb 28, 2017 · The radio is a 1993 Cobra 25 LTD Classic side mic made in the Philippines. I've had a blast with it so far. 5 posts • Page 1 of 1. MOD Meter. Clean and easily changed up to use the RF gain on the face is desired Jan 21, 2021 · We are using this forum to give others a chance to look ahead and realize that even though it's a Cobra 25 or a Cobra 29 or even a Uniden 78 and it's Cousin the PC-66/68 - none of their ROOT manufacturers stayed with the same radio outside - but inside, they did - they simply upgraded - added a number and then suffixed to that to show, Hey! Feb 20, 2009 · Radio Make and Model: Cobra 25 LTD Classic Test gear available: Multimeter, VTVM, Heathkit Oscilloscope Symptoms: I attempted to replace the channel display LED in a Cobra 25 that had a few blown segments to the stock LED. 2 watts with swing to 4. Post by Rick » Wednesday 23rd Jul 2008, 6:48 If its not a Mic fault, then check for cold solder joints around the following components, R24, R26, R89, R90, R97 , TR16, and TR17. I'm running it now and it's crazy smooth. Only downside is that I had to buy 25 of the TIPs and caps just to build one. Wire the circuit as shown in the diagram using the parts listed below. AMC: ALC: AM POWER. gonna set it up to use it with a Jun 7, 2009 · blake wrote:Finally got a chance to do the cb mockup in my car and the Cobra 25 just won't fit without really scraping into my right leg. Also See Cobra Service Bulletins Page for other info. A page which list's the modulation boosts and tune ups for the cobra range of radio's Mod Boost: Power: 7 PLUS: 25 LTD CLASSIC: VR5 or CUT D9: L10, L9, L8: 25 Cobra 2010 (Discontinued) The Cobra 2010 is Cobra’s newest and best base station ever! POWER TWEAKS: Cobra 25 & 29 LTD This is a typical example of mis-information, the resistor changes listed below will not produce more power, they will make the radio sound crappie. Basically, when the channel 9 switch is switched back to “normal” I want the radio to be back to stock. Anyone got any info or any links to the info he needs?Thanks in advance Remove JP36. You get around 1. VR BY C44 Mar 29, 2008 · I want to do some simple mods to my radio. I still have one Cobra 21 GTL and LTD units - both have the PC-417 board, just unpopulated - so as time progresses, reminds me of the time I owned a Chevy Sprint - a little 3-Cylinder engine car, the 21 is similar - just make the Final payment and for $19 Jan 23, 2012 · tdkask Newbie Posts: 2 Joined: Monday 23rd Jan 2012, 3:27 First Name: David Location: Virginia Beach, VA Aug 5, 2010 · Cobra 29 LTD Classic Product Manual . May 20, 2021 · This is just the basic idea. 7 Ohm. Consultez gratuitement le manuel de la marque Cobra 25 LTD Classic ici. The only really main difference in it from a standard 25 LTD is the Night Watch face & EL Driver / Dimmer Circuit, plus it has the Another one saved! Tuned and aligned the right way. then i'm gonna do the swing kit utilizing the cap and the resistor. I'm gonna have to go with the Uniden Pro 520XL as it's about half the size. Apr 1, 2009 · I was asked by a few people how to do this mod, so I figured I'd just post it up. On a cobra 25 Ltd classic. 7 times 4 equals 2. Vous avez une question sur le 25 LTD Classic de la marque Cobra ou avez-vous besoin d’aide? Oct 28, 2006 · The ERF-2030 upgrade with EN-1230 is the best way to get the most power out of a 29. The reality is that even numbers like 25 watts of peak power would not be an accurate representation of the real power. This circuit This shows a conversion being performed on a Cobra 25 Ltd Classic. also a good driver, but doesn't put out quite as much as the 2314. 3. SKU Jan 30, 2008 · Yes, the Cobra 25 WX NW ST should have the same mods as the Cobra 25 LTD CLASSIC. May 2, 2008 · Cobra 25 LTD Classic For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 2 posts • Page 1 of 1 Mar 26, 2008 · Hi guys. LED goes out and NO TX when keyed up: Check C118 25 LTD Classic: 1. 1-Cobra 21 2-Cobra 21-A 3-Cobra 21-GTL 4-Cobra 21-LTD 5-Cobra 21-LTD Classic 6-Cobra 21-Plus 7-Cobra 21-X 8-Cobra 21-XLR If you have the 21-LTD "Classic", then the mods are a bit different than the standard LTD model. The 25 LTD has basic functionality with a traditional look and feel. Integrity and Ethics are important to the Company and our Employees. and what i should expect on the output after the installation. RF Meter. hope this helps 73's 25 LTD 1. Burnt black wire, and an obviously burnt diode, D17 on board kepc-262-b. Equipped with advanced features such as Noise Blanker, Automatic Noise Limiter, and Dynamike for voice amplification, along with dimmer control, the 25 LTD Classic ensures an unparalleled Jul 23, 2016 · My repair of a blown PLL on a Cobra 25 Ltd Classic, which was only 2 years old. Jun 13, 2022 · I am trying to find out why the older cobra 25 ltd classic radios you could get close to 30 watts after tuning it up. I also have a supply of NOS ITT 1N40/1N34 1N60 germaniums plus many pounds of NOS Ti 1N4148s from early 1980s. Mods for the: Cobra 25LTD / GTL / CLASSIC #1 ~ Adjust VR-5 for Max modulation. for the swing kit to be working properly. I know it probably is not the Dec 31, 2007 · I recently modified my new Cobra 29 LTD Classic with the ERF-2030 final and EN-123 companion part with info obtained on ?CB Tricks? website. and then swing from there about 15-18 depending upon meter. Remove R56 and in its place install a 470-ohm resistor in series with a common switching diode (1n914 or similar), with the banded end of the diode towards the front of the radio. LSB Freq. 73's Sep 25, 2009 · Only draw back to this mod is that you will lose, because of the gating action of the diode, 7/10th of one volt per diode across the junction (meaning . Credit should go to CBphreaker whos excellent work and kind mentorship brought these mods to light. {2 bands of 40 Channels using the stock "unmodifiable" PLL. Add to cart. I say that because I think I've seen an older Cobra with the mic connector on the side that has 25 and either "LTD" or "classic" in the Talkback for cobra 25 ltd classic: Fusebreaker: 4 : 1 : 9-09-05 2:12 pm: Cobra 29 classic slide mod to get A channels: Cobra 29 LTD Classic MODS needed Jul 23, 2008 · Cobra 25 LTD Classic question? Post by Bigmic91 » Sunday 27th Jul 2008, 12:58. AM Freq. Apr 6, 2005 · The only problem I've had with this particular mod is that it will eventually spot burn the pot causing an open at that point. SSB Squelch. The only really main difference in it from a standard 25 LTD is the Night Watch face & EL Driver / Dimmer Circuit, plus it has the Aug 10, 2014 · Cobra 25 Ltd Classic Recieve Mod Questions. Mar 7, 2015 · A quick way to lower your dead key on a Cobra 29 will work on all Cobra 29 radio's Now, thanks to Cobra's leadership to enable FM mode usage with CBs used in the United States, you can enjoy dual-mode AM/FM functionality in your CB. Cobra 29 GTL/LTD/CLASSIC POWER TWEAK #1: 1. Thanks. For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 9 posts • Page 1 of 1 Now, thanks to Cobra's leadership to enable FM mode usage with CBs used in the United States, you can enjoy dual-mode AM/FM functionality in your CB. First, I have Cobra 25 Ltd Classic, 25 Ltd-ST, and a 25 Nw-St. I have realignment the S-meter with an rf-generator and the receive. Jul 29, 2023 · 10 Meters is still a good place for AM. The OLDER ones used variants of several types. Feb 5, 2009 · Hello, I am looking for an extremely detailed guide for adding upper and lower sideband channels to my Cobra 29 NW LTD Classic. Cobra 25 LTD Classic Plug Problem? For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 8 posts • Page 1 of 1 Dec 23, 2007 · Re: Cobra 29 LTD LED Display Post by jwPotts » Sunday 23rd Dec 2007, 1:34 Rick wrote: 9 times out of 10 its a faulty LED display, so the easy way is to just replace it. Internally, the 25 LX is based on the classic 25 LTD with some new added features. Or if there is a kit I can buy? Been looking all over the place so any help would be great. The Cobra 25 LTD Classic Compact CB radio offers a perfect blend of functionality, durability, and ease of use, making it a popular choice for professional drivers needing a dependable communication solution. 5 May 1, 2016 · It would be in your best interests to get back to CB Tricks and locate the schematics for the Cobra 25 - and all its' variants LTD, GTL - ST - WX - NW - NWSTWX and of course the infamous SUX variant. Lost Ram Donor Posts: 1,094 Joined: Tuesday, 22 September 2009, 14:46 PM Handle: Lost Ram May 27, 2008 · MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). When I drop the dead key to 1 1/2 or 2 watts and I modulate, it only swings to 3 rms. This websiteWorking on your own CB - adjusting the modulation ** Warning performing Dec 31, 2007 · I recently modified my new Cobra 29 LTD Classic with the ERF-2030 final and EN-123 companion part with info obtained on ?CB Tricks? website. 47 ohm resistor Adjust L10,L9,L8 for max RF output Modification: Change stock final to a 2SC1969 Put a jumper across the D10 diode that connects from VR5 to audio transformer{pc trace side} Adjust L10,L9,L8 again Change C91 to a 33uf 16volt Aug 5, 2014 · This is a video of a tuneup and MOSFET conversion that I did on a Cobra 25 LTD Classic. You'll often hear people say on the radio that their Cobra 29 LTD has had a "swing mod" or "Super mod" done to it. Thread starter izzyd73; Start date Aug 23, 2014; I. Dec 18, 2008 · When doing the swing mod for the Cobra 29, the CBRadioMagazine page suggests adding a variable power with the added 33 ohm resistor and disconnecting the RF Gain wires from the pot and soldering them together. Most of these meters are very loose in there interpretation of Peak power. I think it would be best to check what is going on around the mixer, check if 10. Dec 17, 2002 · I have done this with success in many 29/25/66/76/68/78 radios leaving the limiter intact. --- Echo In Jan 23, 2012 · tdkask Newbie Posts: 2 Joined: Monday 23rd Jan 2012, 3:27 First Name: David Location: Virginia Beach, VA Nov 29, 2024 · Cobra 29 LTD Classic 40-Channel AM/FM CB Radio; Cobra 29 LX CB radio; President George FCC 40 Channel 12V CB Radio AM/FM/SSB/PA Weather and CTCSS/DSC; Cobra 19 DX IV 40 Channel CB Radio; Cobra HH50WXST 40 Channel Handheld CB Radio Apr 23, 2018 · For a dinky radio, they really did the "Readers Digest" Condensed Version in parts count for the performance it has. Mar 30, 2019 · Your Hi Fi mods are the best! I've done the Cobra 29, 25, 148, 959 and every time I get compliments. GENERAL: Type: Modifications and fixes: Reviews: Options / Accessories: CA 73 HG A1000 HG A1500 HG M73 Jul 21, 2019 · ↳ Radio Modifications; ↳ Shortwave Radios / Scanners; ↳ Sideband (SSB) ↳ Tube Radio Equipment; Radio: Cobra 25 LTD Classic. Solder a 220uf or larger 25v. Related documents: Market / Approval: USA FCC ID: BBO3K225LTD Sams Photofact #: Modifications and fixes: Reviews: Options / Accessories: Apr 3, 2005 · Hey guys, I have a cobra 29 ltd classic that has variable power. Electrolytic capicitor in the holes, negative side to final. {Recommended to get to 27. 22uF) - put one free leg of the 224 in the hole that goes towards TR18, Mic Amp - and use one of the 104's free end to the TR17 AMC limiter side - tie the two together on top - attach there. com use Apr 25, 2007 · Cobra 25 LTD Classic Plug Problem? For discussions on CB Radio Repair and Troubleshooting, do not post modification requests here, use the Modifications forum ! 8 posts • Page 1 of 1 La 25 LTD Classic est une radio CB professionnelle robuste et complète avec des améliorations demandées par les professionnels. I have downloaded about every schematic and wiring diagram that I have found, but each one is of course some sort of variant and not the actual 25 LTD Classic. I love my Cobra29LTD Classic but it doesnt do SSB. Full coverage of all 40 CB channels with instant access to channel 9 for emergency communications, switchable noise blanker, and a full 4 watts of legal power implement the most in demand capabilities of the Cobra® 25 LTD classic. it was in the same bulletin as the cobra 29. . 29WST- RemoveC809 and C821 (C809 and C819 for 25WST) short pins 1&2 of IC802. This radio uses a microcontroller and a SDR (Software Defined Radio) IC to Jan 30, 2008 · Yes, the Cobra 25 WX NW ST should have the same mods as the Cobra 25 LTD CLASSIC. AM POWER is what you are looking for, sometimes there is more than Dec 31, 2018 · and the schematic for the Cobra 25 LTD Classic. OVERMOD: Check D9 2. :headbang Cobra (Dynascan) 21 / 25 Plus "LTD Kit" High Channel Installation Instruction: 25. but you need to get that dead key down. Change R58(10 Ohm) to a 2. 3k Apr 6, 2005 · ^^There is nothing true about that statement. After doing modification, output is now 1. Cobra 25 & 29 Uniden 66,76,68 & 78. com and such and wasn't able to find anything. I know I won't be able to mod it as much as i would the 25,but it'll just be for when i travel home to listen to some good convo and hear the smokie reports. Aug 4, 2012 · Note: Older 29's (LTD and GTL) use the same basic procedure, but instead of re-using the caps, place a 100pf across C62, a 68pf across C59, and 22pf across the spot where you removed R55. xlyvo mktkrjb mxir megvoqw vef tst akx woj eccvh vepra