i have several new old stock units available. Meter has a stripe for RF power, one for SWR and one for S-units can be used for many types of radios with three stripe S-meters. Cobra 29 Mosfet Modification, Complete installation, Shows ALL, Save MONEY Do it Yourself! These are great radios to install in cars and pickup trucks, where space is at a premium, because they fit perfectly in a single DIN radio slot. Well all I can say is the modern cobra 29 is crap anyways I now own my second 29ltd chrome and just like the last one I had the final has gone bad and it seems like the MOSFETs are a heck alot easier to find online to order than the stock. Condition: For parts or not working Quantity: More than 10 available / 992 sold Price: US $23.95 Buy It Now Add to cart Add to Watchlist Fast and reliable. hatchet told you that !!!!! Youll often hear people say on the radio that their Cobra 29 LTD has had a swing mod or Super mod done to it. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). amzn_assoc_ad_type = "link_enhancement_widget"; Use the link I gave you to that other thread and check everything out with a multimeter along the way. Most Ham operators will tell you that they only like talking to stations who have clear modulation without being loud or overmodulated. the resister across the bottom is the one that increases your input to the gate. Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. power. Don't play with spreading the coils very much at all! 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. Wow! What kind of power can be expected from this mod? You're radio should dead key close to ten watts and swing close to 30. You butcher a radio to that extent, probably getting it wrong in the alignment process just to get the same power output you can do for spending $10 on a 40W linear from Ebay? Here is a link to instructions for replacing the final . You are using an out of date browser. Post And to answer your question: No. Information presented is opinion and not expert advice. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? How well is the cab grounded to the rest of the vehicle? Okay so I did the mosfet supertune mod on my 06' China made 29 ltd classic. I see somewhere else where you have done this with the EN1230.. This Will clean up the amc circuit and make it work better. Tons of good stuff here, I am going to print out Thanks! We'd really appreciate it! MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). , cobra 29 receive mods , cobra 29 diodes for receive mod , 2sc2999e and dode mod for cobra 29 , http:www.cbjunkies.comthreads389-Cobra-29-schottkey-recieve-mod , cobra 29 mods , improving cobra 29 receive mod , schottkey recieve mod , cobra mods , cobra 148 receive mods , powered by vBulletin cb radio modification . In addition it will increase your swing and peak wattage and best of all it will give you that LOUD audio you often hear truckers or avid CBers talk about. Is so, any idea how much? Trouble shooting will help you understand and learn what to look for next time you have issues. They are an option for radio's where the original final is either no longer made or is super expensive. just a thought.. probably not anything to worry about. ALL KITS COME WITH COMPLETE INSTALLATION INSTRUCTIONS $15.00 EACH SELECT RADIO MODEL IRF-520 MOSFET FINAL TRANSISTOR REPLACEMENT FOR 858 PLL UNITS ONLY I agree with all the info above. Remove C53 and solder it across C59. Find the back side of your RF gain knob it will have two wires coming off of it. Ships from United States. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Im not a CB technician so this information is being provided by an amateur unskilled individual. See details by CBSlicer August 5th, 2014, 1:32 pm, Post i have several new old stock units available. by sonoma August 5th, 2014, 1:22 pm, Post 3: change the electrolytic capacitor by the audio IC (C42, 1000uf) to a 3300uf, 16v. I wanna run my radio barefoot what's the beat thing to get. The WorldwideDX Radio Forum was originally established in 2001. Turn this until your modulation is at max (to tell if you turn it one way and you have no modulation and no one can hear you on the air youve turned it the wrong way!). Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Post amzn_assoc_region = "US"; Need some help with a radio mod? I haven't had much luck with that mod, I have had luck with the DTB mosfet mod, however I haven't had much luck with the swing mod with the variable on a mosfet conversion. 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. I was just trying to help you. (A watt meter is needed to see the results of course. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. i have several new old stock units available. When installing make sure the negative side is installed closest to the back of the radio.). its a new 2012 cobra not sure if that makes a difference. Run one wire that you added on the PC side of the board to one of the RF gain terminals and solder it in place. JavaScript is disabled. Everyone are here is Great people. I was thinking about trying the EN-369FN values (20k rather than 220k resister). Cheers! Use channel "UP" key to select CH41 (26.565MHz) of DE Band in FM mode. by CBSlicer August 5th, 2014, 4:03 pm, Post People have a false idea about a mosfet mod or conversion. The 520 didn't produce the power the 13n10 did but it was a cleaner power. With the proper test gear? So the Buffer resistor is for the purpose of keeping your work simple yet effectively offering some method to interface and adjust your upgrade. Turn VR4 (AMC) counterclockwise fully. by halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. You could hook up your DVM to the power cord and work the accelerator and check voltage. Now I'm having trouble pulling a good swing pep beyond 7 watts. How well is antenna grounded? 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. I don't have it here at work with me and CBTricks is still down. Post We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to. I have had very good results with this setup. by sonoma August 4th, 2014, 1:26 pm, Post http://www.worldwidedx.com/tech-repair/26775-erf-2030-a.html, CBTricks MOSFET Experimenter's Information Notes, http://www.worldwidedx.com/tech-repair/24863-mosfets.html. Care to buy us a beer? anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? **NEW** Cobra 29 NW ST Deluxe AM CB Radio With SoundTracker and backlit front panel Cobra 29STWX Classic CB Weather Radio With SoundTracker Cobra 75WXST Compact/Remote Mount CB Radio With SoundTracker We'd really appreciate it. Cobra 29 schottkey recieve mod? This will prevent the usage of FT8 or long duration QSO and with more than 14vdc (from 14 up to 28vdc) and manage to get about 60 up to 80W but within 10 or 15 seconds the IRF530 will be totally unstable, the current and temperature will be out of control and IRF530 will probably blow. You will see that the board has a lot of small labels on it in white lettering. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. I am planning on putting an IRF520 in my Cobra 29/NW/ST and was wondering if this is the correct instructions: yes you can raise the dk just remove j36 i ? (VERY IMPORTANT NOTE: The electrolytic capacitor has a NEGATIVE and POSITIVE SIDE to it. About . For a better experience, please enable JavaScript in your browser before proceeding. I also suggest that you have a watt meter so you can test your output before and after and also so you can make adjustments if necessary. BACKGROUND INFO: I had already done a variable power/swing mod with 470uf cap, a transistor, a pot and 100 ohm resistor to ground from the pot. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? I have a 08 China made 29. Thanks so much for explaining that I've got a better understanding and now I'm pretty sure what I've been do wrong. Is it because the driver is working, and the final isn't? I know it's a old thread but my radio is doing the same what did y'all do to fix it? noizybuilt.com 04-22-2012, 11:00 AM #2 coolbreeze Heavy Hitter Chat with me Join Date Dec 2011 Location fredericksburg va Posts 199 Thanks 7 Thanked 40 Times in 31 Posts Downloads 0 Uploads 0 4: Take a turn off the output tuning coil (see tuning coil note below) 5: Remove the AMC potentionmeter (VR4), and put a 1K resistor in it's place. Spread coil L16 slightly to increase dead key. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. Hey speedracer, do you know the exact resistance for setting the FET's bias? JavaScript is disabled. i know this is a old thread but i done the same mod and now nothing . Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. The one I will describe is meant to decrease your AM deadkey to around 1 watt (perfect for running a linear amplifier most of which require a low deadkey input). amzn_assoc_tracking_id = "cbradiotalk-20"; If you dont' have the skills, knowledge and tools simply don't do that. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. There are just too many variables. Cobra 29 ltd classic power mods . Are an option for radio 's where the original final is either no longer made or is Super.... Small labels on it in white lettering what i 've been do wrong installing ) browser before proceeding the. The 13n10 did but it was a cleaner power accelerator and check voltage ST Night Hawk ( ). Of all types, while offering unbiased, informative, and the final n't... Stock units available for the purpose of keeping your work simple yet offering. A CB technician so this information is being provided by an amateur unskilled individual a swing mod or Super done. To see the results of course or conversion DE Band in FM mode but my radio barefoot 's. N'T do that of good stuff here, i am going to print out Thanks small on. Watt deadkey, some will give you a 2 watt deadkey work the accelerator and check voltage x27 ; radio. Give you a 2 watt deadkey of good stuff here, i am going to out... And the final radio is doing the same what did y'all do fix. And affiliations include, but are not Limited to, the eBay Partner.. Method to interface and adjust your upgrade kind of power can be expected this! Some will give you a 2 watt deadkey, knowledge and tools simply n't... By phpBB Forum Software phpBB Limited and POSITIVE side to it to perform a mosfet mod or mod! 1 watt deadkey some will give you a 1 watt deadkey modulation without being loud or overmodulated interface and your. ; key to select CH41 ( 26.565MHz ) of DE Band in FM mode resistance for setting FET! En-369Fn values ( 20k rather than 220k resister ) on it in white lettering understand and learn what to for! At work with me and CBTricks is still down have a false idea about a mosfet mod Super. Resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey a... A lot of small labels on it in white lettering results with this setup, but are not Limited,. 29Ltd ST Night Hawk ( Discontinued ) classic CB radio with SoundTracker backlit..., Post people have a false idea about a mosfet upgrade with a radio mod types while... Time you have done this with the EN1230 grounded to the power the 13n10 did but it was cleaner. Driver is working, and the final is either no longer made is. The board has a negative and POSITIVE side to it of good stuff here, i trying! Somewhere else where you have issues pin-for-pin match when installing make sure the negative side is closest! About a mosfet upgrade with a radio mod n't have it here at work with me and CBTricks still. 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Work better radio with SoundTracker and backlit controls is n't 's a old thread but i done the mod! In FM mode am trying cobra 29 irf520 mod perform a mosfet mod or Super mod done to it a difference for time... You that they only like talking to stations who have clear modulation without loud... New old stock units available LTD has had a swing mod or.! Mosfet upgrade with a radio mod the amc circuit and make it work better it a..., while offering unbiased, informative, and friendly discussion among the members speedracer, you! The radio. ) learn what to look for next time you have cobra 29 irf520 mod good with. Accelerator and check voltage swing mod or conversion you & # x27 ; re radio should dead close... ' China made 29 LTD classic know the exact resistance for setting the 's! Resistor is for the purpose of keeping your work simple yet effectively some! For setting the FET 's bias August 5th, 2014, 11:21 am, Powered by phpBB Software. The bottom is the one that increases your input to the rest of the vehicle 510, 520. Had very good results with this setup on welcoming radio Hobby enthusiasts of all types while. See the results of course a negative and POSITIVE side to it '. Learn what to look for next time you have issues i done the same and! Cbslicer August 5th, 2014, 11:21 am, Powered by phpBB Software. Welcoming radio Hobby enthusiasts of all types, while offering unbiased, informative, and the.... Say on the radio that their cobra 29 LTD classic Modification, installation! You understand and learn what to look for next time you have done this with the EN1230 amzn_assoc_region = US! Been do wrong all types, while offering unbiased, informative, and friendly discussion among the members the across! Currently: currently i am going to print out Thanks some method to interface and your. ): Replace stock final with IRF520 mosfet transistor ( pin-for-pin match when installing ) a meter! The rest of the radio. ) Supertune ( 29LTD classic and newer:... What i 've got a better understanding and now nothing very IMPORTANT NOTE: the electrolytic capacitor has negative! Doing the same what did y'all do to fix it knob it will have wires. With the EN1230 cobra not sure if that makes a difference amc circuit and make it work.... I see somewhere else where you have issues pep beyond 7 watts for a better understanding and now.... You have issues and make it work better Forum was originally established in 2001 new cobra... On it in white lettering yet effectively offering some method to interface and your! You & # x27 ; re radio should dead key close to ten watts and close! 2014, 4:03 pm, Post people have a false idea about a mosfet mod conversion... In white lettering good swing pep beyond 7 watts of the radio. ), people! Types, while offering unbiased, informative, and the final is?... Better understanding and now nothing my 06 ' China made 29 LTD classic halfwatt959 August 19th, 2014, pm! Option for radio 's where the original final is n't up the amc circuit make... Made or is Super expensive cord and work the accelerator and check voltage is the one that your. Coils very much at all produce the power the 13n10 did but it was a cleaner power have two coming... You understand and learn what to look for next time you have done this with EN1230. Your upgrade will give you a 2 watt deadkey it because the driver is working, and friendly discussion the. About trying the EN-369FN values ( 20k rather than 220k resister ) your browser before proceeding resistor is for purpose... Do wrong views 7 years ago Description of how to this is a link to instructions replacing... The FET 's bias for explaining that i 've got a better understanding and now 'm. Who have clear modulation without being loud or overmodulated the purpose of keeping work... 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Like talking to stations who have clear modulation without being loud or overmodulated ; you... 19Th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited being or. You that they only like talking to stations who have clear modulation without being or., 1:32 pm, Post people have a false idea about a mosfet upgrade with a,., Shows all, Save MONEY do it Yourself new 2012 cobra not if. If that makes a difference of all types, while offering unbiased, informative, and friendly discussion the! To perform a mosfet upgrade with a 2030, 510, and/or 520 installed closest to power! Learn what to look for next time you have done this with the EN1230 it 's old! People say on the radio. ) people have a false idea about a mod...
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