Cobra 29 ltd classic meter not working reddit. Aug 13, 2008 · 60. Wilson 305-492 T2000 Series Black Mobile CB Trucker Antenna with 5-Inch Shaft Wilson Antennas 2000 series is a stainless stell centre loaded coil, 5" shaft and 49" stainless steel whip. Why the guy just didn't build a simple stinger board to add into the cobra 29. Oct 26, 2023 · 29 LTD Classic 40-Channel AM/FM CB Radio with Microphone in Black. You may have had the problem and did not know it. Discussion in 'CB Radio Forum' started by Sasquatch308, Jun 15, 2019. This is a large and very visible forum. ) Disconnect the 10. for L14, connect the probe to the junction of L14, L13, and C59. C2078 final. It acts like the Squelch is on all the time. An adjustment procedure for VR6 isn't in the service Posted by u/victorabartolome - 50 votes and 38 comments Jan 17, 2024 · Highlights. Jun 15 XenForo add-ons by Waindigo™ ©2015 Waindigo Ltd. But that radio only put out by itself a 6w deadkey and swung up to 22w to 25w pep @ about 12w to 14w average swing. I've worked on a few Cobras, it's pretty common. The new 29's use a different chip than the 7222 (I'm not sure the exact date this changed, sometime late last year I believe). Checked everything receive gain , Squelch, mic, and even did the tech bulletin to tighted the board mounting screws and that worked for a little about a week. Jun 26, 2005. 102. Dimmer function - Meter lite and channel display show Bright/Dim? No PA - Mic circuit but there's more. Add a SPST switch (tied to ground) for Nov 19, 2009 · Jul 1, 2019. RX and TX modes? No receive but hiss, does it TX red? If no red light then power supply failure nearly certainregarding TX Switch or Regulator (TR21 or TR23 To correct this issue, first disconnect power to the Blackbox. secret squirrel. After doing modification, output is now 1. One has low modulation only swings like 6 watts with the limiter clipped I have no idea what is going on with it. With say a Texas Star 350 you put the amp on Hi and have the radio variable power all the way down. The trunked package is in upwards of $2,500. Even the new 29 LX-LE radios have the 22 pin uPD2816 or their rebranded Cobra 29LTD chip in them in the schematic. I noticed on my second 29LX the problem of an antenna warning light coming on seems to happen and apparently happens on all the 29LXs. So long as the TIP transistor is only controlling the driver transistor it won't get hot enough to need a heat sink. Never had the TIP overheat this way. When adjusting the volume knob, the radio will cut out. Oct 11, 2020. . I took it out of the truck one weekend for truck repairs then when I went to plug it back in it wouldn't power. Then flip it to the SWR setting and you're good to go. 40 CB channels for full coverage. If not, try turning the modulation up some to about 90-95%. 5w for RM203 usage (not included). The meter works on receive and swr cal. Looking for a solid mod to change the dead key of a Cobra 29 LTD Classic from 4 watts to approx 1-1. Both are made in China now. Mar 10, 2015. Instant channel 9 for quick access to emergency channel. Claims to of had a peak and tune. Apr 3, 2005 · I have a 2016 model Cobra 29 ltd classic. Jun 11, 2006 · Its a crazy way to get 100 or so watts out of a cobra 29. My thought on this is that the RF gain potentiometer is working as it should so the issue will be on the board. Base, make sure that your power supply once again can handle the amps required. This should help. Hi all, I have a Cobra 29 LX that was working fine until a couple of weeks ago when the squelch stopped working. qrz. Jun 13, 2020 · Third photo is a resistor, but looks stock. the easiest way to do this is put a resistor capacitor at jp36 position , be sure to take the jumper out. The radio works just fine (except for the Want to install echo board into cobra 29 LTD classic. Clean and easily changed up to use the RF gain on the face is desired. May 1, 2008 · May 1, 2008. Feb 8, 2019 · 589. When I modulate, the rf meter doesn't move. - Black. The radio lights up. 1. Check the audio ic with your multimeter and reference the service manual for the correct voltages. Which is better? Cobra 25 LTD Classic or Uniden PC68LTX? Originally, the same circuitry for both. Location. I have no idea where that would be on the board. hello to all i have a cobra 29 ltd classic china made 1995 all the info i find where it says to replace R123 to a . Has anyone experienced this Jun 25, 2023 · The 29 LTD Chrome CB Radio is the perfect solution for keeping in touch with friends, family, and teammates whether you're using it for work or for recreation. So I replaced the final, driver and pre driver transitor. Mar 5, 2012 · 1. Cobra 29ltd classic. 17 offers from $84. If your careful with a small jewelers screwdriver you can loosen the screw at the top of the meter like 1/8 to 1/4 of a turn and I bet it frees up. 28. Nov 18, 2010 · Nov 18, 2010. To work correctly, there needs to be a fuse installed. 3. 5 watts by utilizing the channel 9 switch that I never use. 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. There is a switch on the front of the Cobra 29 LTD Classic to switch between the PA mode and CB mode. It is an altogether different chip, and currently there is little info on the net about it. 5 Technical Details. Leave them alone, since any power increase is due to harmonics well above 27mHz getting through. I know it's not my wiring or fuse in the link because I have a 23 channel cobra 29, i plug in the same plug an it powers up fine plus I took my multimeter to the back of the plug where it enters the radio and there is power there. Jan 16, 2020. It won't be upper or lower sideband mode. 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. Professional CB Radio with AM/FM. Cobra 29 ltd classic help. The 29 LTD Classic CB radio is the perfect solution for keeping in touch with Aug 23, 2018 · Aug 23, 2018. It's a known problem for the 29LTD. And other radio will not transmit a signal the the 29 no movement on radio. We are working every day to make sure our community is the best Radio Hobbyist's site. 1989 philippines. Durable, reliable, and full-featured, you'll get clear CB communication on the road with 4 watts of power, 40 channels, and new dual-mode AM/FM functionality. Normal wear and tear from prior owner. This old beater cobra 29 Ltd classic is just a radio I use for experiments that I’ve had around forever. My guess would be either D5 or C29 has crapped out. Messages. when i put in . This occurs whether an antenna is connected or not, so definitely not a noise level issue. Mar 5, 2012. Full coverage of all 40 CB channels with instant access to channel 9 for emergency communications, switchable Apr 3, 2011 · The RF gain will drop the incoming noise level, but the meter doesn't move. com. But, the absolute most common reason for a failed output test is due to transmitting with a high SWR. Also, there are 3 different audio chips for the 29. 4. Also need to be done at a stable room temperature. I switched mics and that isn't the problem. Pay $114. www. Easy to operate; ergonomic design with intuitive Mar 13, 2019 · The WorldwideDX Radio Forum was originally established in 2001. The Red arrow, is negligible - the AMBER arrow is from the PA step you just performed. Temperature also shifts the counter as well. #9. Nov 3, 2009 · Once you know this it's simple, you are looking for a 1 to 4 carrier to peak ratio. The 29 meter is seeing static noise but when I key the other radio the 29 meter goes back to zero. 47-ohm no power Feb 25, 2019 · Cobra 29LTD classic help no tx/rec. Bills2way hasn't been in business in a while. Let’s see some Cobra 29 ltd classic troubleshooting ways. I thought possibly the squelch pot had Jan 21, 2018 · for L21, connect the probe to pin 7 of IC3. I think I'll send it to a tech. Unless you have a damaged radio (new or not) you have a problem in your antenna system. In AM mode, you will not notice freq shift in . I just picked up an older Cobra 29LTD Classic from a driver who didn't know if it worked or not. Verdict / Bottom Line. May 4, 2023. I just had a Cobra 29 LTD Classic tuned up and everything is working very well with one exception. Which is better? Cobra 25 LTD Classic or Uniden PC68LTX? : r/cbradio. I have a Cobra 29 LX (2011) with the digital screen and meter. If the radio won't do anything when you key up: Make sure you are feeding it with 12volts DC off your vehicle battery or a power supply large enough to supply 3 or 4 amps. Nov 9, 2017 · 53. ( no sound). Actually a lot of those meters get stuck from the grease and oil that was used to lubricate the movement. Turned out amazing. Pin 14 of the PLL is the Reference Oscillator Buffered output (10. key after that. Pro-Series, Compact Design. Ok, so I have a Cobra 29 LTD classic that is not powering up at all. CB power and ground are ran straight to the battery, using a 18' coax cable with a firestik stud. « Previous. XenForo add-ons by Waindigo™ ©2015 Waindigo Ltd. The radio now turns on and the tx light changes when mic is keyed but shows no carrier/modulation and meter on the radio Feb 25, 2014 · 56. From 0-max dead key. for L20, connect the probe to the junction of R61, C85, and TR16. The only thing I have adjusted is modulation. 9. for L17, connect the probe to the junction of R58, C155, and L17. The conventional package is more reasonable though is still several hundred dollars. You’ll find one in a lot of trucks as it is a firm favorite with many truckers. It's definitely getting out there and receiving well, based on talking to a few fellers out on the skyway. A place to talk about CB radio: how to use them, how to install them, and how to get them working their Mar 10, 2015 · Aug 2, 2014. Works on all cobra 29 radios, ltd and up. #3. I wasn't able to find info specific to my 29 LTD Classic although the site recommended to me had almost every other 29 listed. The SWR meter function on the radio will not calibrate to set, it will gradually climb up after I hold the transmitt on for a few seconds but will still not reach "set" even with the calibrate knob full to the right. If you want to check SWR, put the radio on Channel 20 with an antenna hooked up and flip the switch to CAL. Hello everybody. Was leaning towards the ranger eb-2015. O. Here, you need to adjust some knobs. If you prefer more modern looks then the Cobra 29 LX might be worth looking at. First, its meter isn’t working. Premium VIP Member The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. SC. A place to talk about CB radio: how to use them, how to install them, and how to get them working their Feb 6, 2018 · Feb 6, 2018. Internally, the 29 LTD is based on the classic 29 LTD but with new FM electronics. 47-ohm resistor i have no power output R 123 resister on my meter reads 1. May 17, 2019 · Hold your sniffing antenna near the driver transistor. Sep 28, 2023. Neverready, Nov 19, 2015. The Cobra 29 LTD Classic CB radio has been the standard of excellence in professional CB radios for over 50 years. Dec 5, 2016 · Cobra 29 nw ltd classic, no receive. Classic CB Radio with NightWatch™ and AM/FM. Dec 7, 2008 · Jul 19, 2020. If you shake the radio and the meter does not move, the movement is likely just stuck, and the light is probably burned out. If it still doesn't work, you'll need a new meter - they aren't expensive. get the cap resister set where you want the low power set. No receive from a working receiver usually means either shorted antenna circuit (coax, connectors or an internal short within the antenna) OR an open antenna circuit (usually no connection somewhere between the antenna and the radio. The design is ergonomic and intuitive, making it easy to operate. If there is any transmit signal at all being generated, you should hear it this way. I thought about trying some mods on it, so I looked up some info, cracked the case, and found it had already been modified. the same scenario on my Realistic trc-427 says to change R-61=1-ohm resistor to a . 3 to 1, Battery Test Passes, and Power Test Passes, but the warning light The Cobra® 25 LTD Classic is a standard sized radio perfect for those that want a solid, reliable CB radio without paying for all the extra features of the 29 LTD. Has normal meter movement for receive, and keys up at nomal watts. every thing works squelch rf gain but no tx and rx. Adjusting VR2 will change the meter, but the RF gain does not have any effect. The 1st 29 w/rfx95 installed does keys 18w and its advertised PEP watts of around 97w, with 25w to 30w average swing. #1. The benefit is you do not need multiple versions for each radio (unlike Motorola). I have the same radio ( 29 classic) so it should have a swr meter builder into it . #4. Nov 19, 2015 · If it is the rx/tx light going from green to red when you key up it simply means you are transmitting. 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. People have been wanting access to FM mode on CB's for years because it offers clearer sound quality with reduced background noise. The radio works great except for the meter on xmit. 95 after $25 OFF your total qualifying purchase upon opening a new card. L17 and L20 should be adjusted for maximum carrier (dead key) on ch20 only. Apr 3, 2017 · 3/29/19 Cobra 29 Meter Stopped Working georg norch, Mar 30, 2019. Jun 3, 2011 · Modified Cobra 29. I do have 10. #2. switch open The 29 LTD Classic CB radio with Black Face is the ideal solution for keeping in touch with friends, family, and teammates whether you're using it for work or for recreation. I'm not sure what to make of all the information on their website. r/cbradio. 153. I tried a radio keyed next to it and nothing. Oct 14, 2007. Durable, reliable, and full-featured, you'll get clear CB communication on the road with 4 Watts of power, 40 channels, and new dual-mode AM/FM functionality. 695MHz oscillator and inject this signal into the mixer instead. Fuse was blown, replaced fuse and still wouldn't power, switched to my other radio with same power connector and it worked fine. The Cobra 29 has a built in SWR meter. power supplyin a mobile, direct to battery with filtering. DK set to 1. Depending on when you r radios were made. Dual mode AM/FM channels for clearer sound with less noise. Dec 12, 2011 · Indiana. Even with L19 removed I am still getting 4. The second problem a radio runs into is a broken mic wire down by the plug. Cobra 29LX Antenna warning light Problem. 18. I followed the instructions in the manual to set the SWR. The best tune I could get was 2:2 with the built in swr meter. Fairly new to the CB scene. Jun 12, 2011 · 740. Jun 12, 2011. Nov 1, 2013 · Bought a used cobra 29. 95. No meter movement during swr meter calibration usually means no rf output from the transmitter. I see mentioned many times about adding low channels to the cobra 29s with out an expo kit or xtals. Pluged in speaker to pa and the pa don't work. I know there is probably a page in here somewhere explaining how to fix my machine, but I cant find it, (New here) Only thing I have found was to remove TR-13 to see if audio comes back, I did and the receive audio comes back somewhat. And welcome to the forum! And although it was over 55 years ago I to at one time had no idea how to adjust anything now the problem I have is remembering Mar 17, 2012 · RoadKing RKCBCLASSIC 40 Channel Classic CB Radio with Large Digital Display and Illuminated SWR/RF Meter, Grey. IIRC it's something like YD1022 (not sure of the number, I can check Monday when I get to the shop). Well that day has come. Apply for a Home Depot Consumer Card. 283. Like previous Cobra 29 LTD, the new 29LTD includes 4 Watts AM RF power output, the maximum allowed by law The Cobra 29 LTD Professional CB Radio boasts a classic design that has been a standard of excellence in professional CB radios for over 50 years. Problem is there's no sound for receive, and when keyed up no audio or swing. Oct 18, 2005 · Guest. I do not want to use the RF gain knob to accomplish this. Later models used a 10pin chip, yd1022. Buckner, Illinois. #6. $229. Oct 13, 2016 · Dec 12, 2016. This mode does not transmit. Can anyone help me with the problem with one or both please? Feb 8, 2020 · If the PLL was not locked on a channel you have no audio - but you would still have a green light. The first is an antenna that is not tuned. Aug 18, 2017 · Aug 19, 2017. The rf is unmodulated, at that point. I checked the pll with a known good one and its ok. Uniden PRO505XL 40-Channel CB Radio. Trucking Jobs in 30 seconds. No mic or power cord included. I guess a tech can undo that at least I hope so. 11. $ 139 95. Does have new meter in it (last month) Also has GammaRay decal on front face that I added when I got it in 2018. Temperature shifts usually affects most radios, some will shift a lot and others shift little. Jun 8, 2009 · Fix the audio amp first, then try the meter. Big decline in quality, during that time. When running power make sure that your battery can handle the extra amp strain. Cobra 29 ltd classic may have encountered four common types of issues. So I have a couple month old new cobra 25 ltd. BTW, that frequency expansion kit will get you frequencies/channels above and below the standard 40, but it will still be regular AM. 37. 2) what is the voltage that is feeding the radio. Kind of interesting, VR5/RT5 still adjusts the forward power measurement and RT7 (new) adjusts the reflected power measurement. Cobra 29 LTD NW. CB/PA When you key up the radio - and you don't have a PLL lock - you'd have a Green light, but it would go off, not turn RED - it just goes dark - PLL out of Lock. 240MHz), and hooking it somehow to C12, a 4. Take a screwdriver with a thin tip, touch it to the clockwise lug of the volume control. The Cobra 29 LTD classic has two transmitting modes. The Cobra 29 LTD CB radio has been the standard of excellence in professional CB radios for over 50 years. 7uF electrolytic capacitor which is part of the RX +8v and near the RF Gain circuit Jun 15, 2019 · Cobra 29 meter stopped working. One resistor, a piece of wire, and a Cobra 29 LTD. The problem that is having is that the receive keeps cutting out it transmits fine but i completely lose the Most likely the solution will be found in adjusting/fixing the antenna not the radio. 5 watts dead key with swing peak 5. } Click to expand A. It should be between 12 and 14 V. It’s the same Classic platform as this radio but with more modern features and The Truck Driver's #1 Choice. Instant Emergency Channel 9, External Speaker Jack, Large Easy to Read Display. Make sure you are using the correct microphone. It could be out or just stuck. I have spend the last 2 mornings practicing how to do alignments, and I figured out a couple tough problems Jan 3, 2021 · Seems the radio just quit RX and TX. i have a feeling that it's either L20 or L17 that is the culprit, but its just that, a hunch. Take the amp board out of a goodAM/SSB/FM high powered 10 meter radio and put it into a 40 channel AM only CB. Would anyone have the info or directions on doing this mod for low channels. We mount it to the Cobra 29's internal heat sink with high-temp double-sided adhesive foam called "VHB". Mar 25, 2011 · Hi, Obviously without intention, while performing the receive upgrade to a 2019 Cobra 29 Ltd Classic, I touched the two speaker wires (red & white) together . It seems like all radio test pass SWR 1. 240 at the vco. 5-ohms. 4 watts of output power, the maximum allowed by law. The 19 has no SWR warning light. I purchased what appears to be an unmolested 1995 Cobra 29 LTD from Goodwill for $30. It does not mean it is correct just that's what the radio sees according to it's internal adjustments. ago. Often right out of the box it's set for too low SWR making the warning light is too sensitive. Sometimes its set so the only time the light turns on is with no antenna connected but you wouldn't notice that. $139. 8V on TP2 R88. I can turn the squelch knob all the way to the right, and the squelch never closes. Y. Check for a short and put an SWR meter on it. After a complete tune up/upgraded final/mosfet/etc, See the attached PDF. This will help us all maybe help you. Apr 25, 2018 · Well, let's start with a list of the equipment you have and the actual brand and model numbers. nomadradio. I have green light and red light when i transmit but no output. If so, next check the receiving radio's S-meter to see if the slugs in L21, L20 and L17 are all set for peak reading. Oct 16, 2005. Feb 6, 2019. Found a 4' antenna at my shop and fabricated an antenna mount for my jeep XJ. I put a radio next to it and 29 will not transmit any signal to the other radio. Central Florida. The protection diode is there to protect the radio if it gets hit with reverse polarity. Basically, when the channel 9 switch is switched back to “normal” I want the radio to be back to stock. next just put a spst switch across the location you put the ,cap in and this way it will bypass the cap resister and give you the high power mode. this mod will give you a variable dead key using VR4, the modulation adjustment VR. Options. Now enhanced with new dual-mode AM/FM so you'll have clearer sound with less background noise. Lay one finger along the screwdriver shaft. Aug 31, 2016 · A simple SWR/power meter will help determine if you have much forward swing. 158. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 60. Turn on the radio, and turn the volume full up. dxHome dxForums Aug 16, 2006 · Ok guy's I'm in a little pinch here. Feb 5, 2009. Drop in to rag chew or just come check the mail. Apr 6, 2005 · Louisville, KY. Key the radio up and turn the calibration knob until it reaches the CAL mark on the right side of the meter. 2. 73. It won't power on. ) Frequency Counter Mod. Feb 5, 2009 · 1,673. The internal meter is good for seeing major problems, but for tuning the antenna is highly recommend an external meter. Sep 16, 2021 · One package is for conventional programming and the other for trunked programming. {Working for Transmit, & Receive! Compatible with: PLJ-6LED PLJ-8LED, Galaxy FC-347 frequency counters & Lesscomm 3 band pcb's. Build a 10. Jan 21, 2010 · Rochester N. The PA mode which is used for talking through an external speaker on your vehicle. Sep 23, 2021. 0 Avis. 58. Then cobra decided uniden built cost too much and had rci build them. May 18, 2020. Here's what I found so far: A place to talk about CB radio: how to use them, how to install them, and how to get them working their best. Make sure you have a properly tuned antenna installed. The 25 LTD has basic functionality with a traditional look and feel. Hover Image to Zoom. OK, so you key mic, set meter to calibrate mark with knob, unkey, flip switch, and key again for reading. Access to both AM and FM modes on all 40 channels to communicate with more users and with better sound quality, can communicate with older AM-only CB radios, no need to replace existing antenna. Oh Boy! Now the meter (no light, nor needle movement) and the onboard speaker are not working. Feb 15, 2016 · C. May 13, 2008. 55. 695, High Side injection into the 1st mixer). 12K subscribers in the cbradio community. I do not align freq unless the radio AND counter have both been on for at least 30 minutes. Also tried external speaker still no sound. Not perfect. I was testing amps and blew the radio meaning it would pop a fuse everytime radio was turned on. $149. The 29 LTD Classic,is the perfect solution for keeping in touch with Apr 6, 2005 · Touch the tip of the guitar plug with a finger, and you get the same loud hum. 6 out of 5 stars. Just my observations based on a new Cobra 29 and a new Uniden 78. first time poster and cb radio owner . 0 watts peak on Bird Termaline Relative Output Wattmeter/dummy load. thanks. Looking around for an echo board to out in my radio but can't find good instructions for the. 2 watts with swing to 4. Questions & Answers. I wouldn't recommend using the built in meter for testing see. 240MHz signal from the TX mixer. my92shitbox. 29s are probably some of the most frequently modified CB radios. Their tuning parameters are not modulation dependant. Sparta, New Jersey. The Cobra 29 NW series is the classic CB radio design with the added benefit of the FM mode! The Nightwatch illumination makes the radio easy to see and use in the dark. Mar 11, 2012 · Really, a good station (mobile or base) must have 3 things all working together efficiently. The RX functions of the chip itself are locked out and not used. Jul 27, 2014. To me the Uniden board is sturdier, it aligned easier, and after 1 hour was on frequency. Do you have a spring at the base of Apr 9, 2017 · Dec 5, 2017. So, recalibrate it. Picked up a used Cobra 29LX from a pawn shop. Second, meter light problems, so replace the LED. If the power is too low for some reason it won’t key-up. I have two Cobra 29 Classic's. Out of the box , dead key was 3. Next, plug your handset into the Blackbox USB jack and then reconnect power to the Blackbox. 47-ohm resistor. Jan 21, 2018 · Ok, I finally have good clear audio from my test radio to the patient, when I key the patient I get static on the test radio but no audio, and when i look at the modulation meter when i key the patient the need bounces a little and falls right back down, but i do have a carrier, I did the test on D15 and it checked out ok. #5. It’s not about fixing it so much as it is learning what I’m doing. Jun 29, 2016 · Selling my Nov 95 Cobra 29 LTD Classic. Apr 8, 2006 · Seems like it was spread only in the middle into two equal halves but not every coil spread individually. If it's stuck, carefully lift up the tape on the top of the meter, apply a tiny drop of oil on the screw and turn it carefully a little bit. You can buy replacement meters from Ebay, as a lot of CB shops have Ebay stores and the meter is around $10-$15 and comes with a new light. Mar 8, 2011 · 37. Apr 15, 2020 · 1995 Cobra 29 LTD WX Classic - No Modulation. The Cobra 29 LTD NW adds NightWatch™ illumination to the 29 LTD Classic platform for enhanced safety and convenience, reducing eye fatigue while driving at night. Dec 26, 2020. I have another one is barely showing modulation and what little it is showing it swings backwards. Midwest. Much more sensitive and capable of really getting your SWR as low as possible. 8V at 19 of the PLL. Sep 23, 2021 · 38. I have a cobra 29 LTD Classic with 4. Just getting into the hobby and was able to buy a cheap clearance $7 walmart magnet mount antenna, $3 cobra mic (goodwill) and the power cables $5 to attempt to get this up Posted by u/leprakon13 - 3 votes and 2 comments Jul 7, 2023 · The on the air test proved it to be an excellent competitor. Mar 9, 2006 · Hello recieved a cobra 29ltd classic when i turn it on transistor(C2314) located by r58 rear of radio smokes like hell any help would be a appreciated. Classic golden screwdriver dirty signal tuneup crap. I have a Cobra 29LTD and it has no transmit and receive. The CB mode which is the mode for transmitting and receiving. Aug 4, 2017 · We are working every day to make sure our community is the best Radio Hobbyist's site. I believe that a company called Giant is making the Cobras and that Unidens are made in their own plants in China. Even if it worked (or seemed to be working correctly) or not. #32. I plugged it in, it works fine. Apr 24, 2018 · Meter lite - even work? Might mean a power failure - not just burned out. This radio is durable, reliable, and full-featured with 4 watts of power and access to all 40 CB channels. Bought this brand new radio thats been tweaked and peaked. #12. Here are the VR's for the cobra 29 ltd classic. Third, SWR meter is not working. . VR6 is the adjustment for the antenna warning. Might be with the current pll on board. From what I've read it needs 8 volts power. Apr 5, 2005 · 6. Limit 2 per order. It's a unit from 1994 with side mounted mic jack. or even add in another class c rf amp section into the radio. • 2 yr. We will get to the antenna light vs. Jul 28, 2013 · Sep 22, 2016. I did for kicks swap out L19 with another coil and same thing. It could also just be the meter itself that is not reasons correctly. Public Address (PA) Function. 1) try substituting a different mic or two. The only actual way to determine if your radio has any output is to hook a power meter to it. The diode shows up as a short when it's hooked up backwards and should cause the current consumption to jump high enough to open the fuse. With the unidens being made to higher quality control standards. 0. The 29 ltd classic is a great radio if not the best radio on the market today. The older ones had a 10pin chip, ta7222. I recently got a cobra 29 ltd and it worked fine fire about 25 minutes and then it blew a fuse no biggie then I put in another fuse and it blew, I double checked my wiring and nothing is shorted and is hooked up correctly no reverse polarity, I put a bigger 5 amp in and it didn’t blow and the radio powered on but May 25, 2021 · The Cobra 29 - every one is "set gain" amplifier for the Mic, so what you can use is the PA system, with the VOLUME set to 1/2 way up - and you SET DYNAMIKE to show 1/2 watt of power into an 8 ohm dummy load in PA MODE. Was used briefly in my truck and then moved to house. I get volume. L19 will not adjust the voltage at the test point or pin 19 of the PLL. Have your watt meter in-line and key the mic, since the TS350 does around 300 watts PEP you want to get the amp to dead key 70-80 watts out. As long as the antenna light is dark the radio is seeing a swr in the safe range. Having two problems. 1,014. it seems the only issue its having now is actually getting audio out Broken meter, clipped circuits horrible talkback! Can this newbie fix it? May 18, 2005 · 16. hp wo bn al pp wo of nw vq rr