6) Now you will need to solder the cap into place on the solder side of the PC board. Is it possible to due without performing this step, or will the performance suffer too much? It may not display this or other websites correctly. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). When installing make sure the negative side is installed closest to the back of the radio.). amzn_assoc_marketplace = "amazon"; Turn Pot VR2 fully counterclockwise to achieve full modulation. So what exactly IS the famous super modulation modification? I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). With a cobra 25 I have seen slightly higher wattage. In these above graphics, pay attention to the ones with the resistor values. We are working every day to make sure our community is the best Radio Hobbyist's site. I see somewhere else where you have done this with the EN1230.. Is it because the driver is working, and the final isn't? by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. Some people want to be able to turn the power down for running an amplifier and then turn it back up to run without one. i have several new old stock units available. Remove R55 amd solder a 22pf cap in its place. Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Tons of good stuff here, I am going to print out Thanks! i have several new old stock units available. I like the variable power mod. Mobile installs are all different and some pose more problems than others. On ebay people often will tell you that the radio they are selling has had a swing modification done to it to make it a screamer. take a look at the mosfet mod paper work from cbtricks and see if you missed a step. Unfortunately the hotter it will get also I usually set mine to 3 volts due to the size of the heatsink. Cobra 29 IRF520 mod 617CentralMASS 72 subscribers Subscribe 45 Share 10K views 10 years ago Just a side note the Cobra 29 will not peek out as high as a Cobra 25 will even with the IRF520. The WorldwideDX Radio Forum was originally established in 2001. and MAKE SURE the final mount screw is tight! anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? 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. Cobra 200 gtl Mod IRF520 and 2SC1306, remplace RD16HHF1 and 2SC2078 RadioMetal DX 6.4K subscribers Subscribe 167 13K views 7 years ago Ahora es posible modificar el cobra 200 gtl a mosfet. by sonoma August 5th, 2014, 1:22 pm, Post A forum to find other HAM / CB radio operators on-line? Information presented is opinion and not expert advice. You are using an out of date browser. How well is antenna grounded? I have a 08 China made 29. by CBSlicer August 5th, 2014, 4:03 pm, Post It may not display this or other websites correctly. The 520 didn't produce the power the 13n10 did but it was a cleaner power. 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. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. but when I check the voltage and it is low I change the resister to get it closer to 3.5 to 3.8 volts. Is so, any idea how much? Remove C53 and solder it across C59. It may not display this or other websites correctly. We'd really appreciate it! It'll get you a S point on the receiving end. Replace C71 with a 33-47uf cap. Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? hatchet told you that !!!!! by RadioEndeavor Monday 13th Oct 2008, 14:16, Post 2 and 3/4 DX RADIO CHAOS. Make sure to reinstall the stock insulator and apply a small amount of silicone thermal grease to each side. just a thought.. probably not anything to worry about. cap. Thanks for the info. by Dino November 10th, 2008, 8:48 pm, Post Basically with it sounding good and not being pushed to the max. Make sure you hook those two wires from the RF gain together that you clipped if you dont follow that step youll have no receive . Wow Andy, have you ever thought about writing a book? You can get all of the parts you need for this mod at Radio shack. I was able to successfully install an IRF520 MoSFET final in a Cobra 18WXSTII+. About . Very good point. 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 Cobra 29 schottkey recieve mod? See more similar items . FIRST INSTALL: ERF2030 I followed all the instructions on CBTRICKS and I was getting 0 power out and 0 swing. I try a 220K since the 230K are hard to find. 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. Doing it that way really lets you fine tune it. JavaScript is disabled. Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. It keys at 1/2 watt and swings waaay over to 5 watts. A little solder on the pins , otherwise like new. Cobra 200 GTL . Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. 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. You found us! How well is the cab grounded to the rest of the vehicle? 50W impossible. Also is the radio tuned and aligned properly? by RadioEndeavor Tuesday 7th Oct 2008, 13:08, Post ok..want to do 520 mosfet in a cobra 29 but not sure which instruction to use..(insturctions via internet) any suggestions? It is very helpful. The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. Thank you again for the info. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. 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. Remove C53 and solder it across C59. COBRA/UNIDEN SUPER MODULATION SWING MOD KIT for Cobra 25, 29, Uniden PC66, PC68 $8.99 Free shipping super modulator Variable Power SWING Kit For Cobra 29 CB $39.99 $10.40 shipping 82 sold CB Clarion Citizen Band Radio Component System JC-203E 40CH CB Module $39.98 $24.97 shipping Look on cbtricks main page under mosfet experiment notes.. it's not very clear but it's there on the left hand side of the page. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. WARNING: Modifying your CB radio is illegal. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. I put in the MOSFET final kit. Some how it got turned into this "hi power mod" when in reality your probably only going to see 5-10 more watts, if that. We are working every day to make sure our community is the best Radio Hobbyist's site. Hey speedracer, do you know the exact resistance for setting the FET's bias? Where exactly was the reading taken? It may not display this or other websites correctly. I'm not that good at understanding what everything in a circuit does, but here's my take: Although the mod sheet provided points out the use of the 1K ohm resistor with D11, it doesn't say if the resistor goes to the right of the diode banding. Thanks so much for explaining that I've got a better understanding and now I'm pretty sure what I've been do wrong. by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. IRF520 and ERF2030 are the same. The first thing to know about this modification is that you dont need a special kit to do it. , 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 . I was just trying to help you. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. I was thinking you should have 3.5 to 3.8 volts at the gate when you dead key the radio with no modulation. Colmenar is a municipality in the province of Mlaga, in Andalusia, southern Spain.. Colmenar has been populated since the Neolithic age, as testified by the remains found at the Cueva de las Pulseras.After the Reconquest, the town was named after a nearby farm known as Colmenar (Spanish: "apiary") for its great number of beehives.The history of the village began in 1487, but it is not before . work with the mosfet? I could keep going, but point is, like stated, start somewhere and work your way back from there. Regarding the resistors around the VR and diodeI'll have to look at the schematic again tonight. You assume all risk if you try to do any modifications and we can not be held responsible. 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 ? you sure you didn't mistakenly flip the banded side of the diode the wrong way? How is radio grounded? irf520 mosfet for cobra 29. Cobra 29 IRF520 mod 617CentralMASS 10K views 10 years ago This is How I Modified a Cobra 29 CB Radio FAST chase fournier 2.4K views 4 months ago COBRA 29 MOSFET CONVERSION: CB Radio How. by SinStp Wednesday 8th Oct 2008, 12:51, Post Apr 23, 2018 5,755 8,059 573 www.cbtricks.com Jan 5, 2020 We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Many CB technicians can do this type of modification but can also make the necessary adjustments to give you both a LOUD signal without being overmodulated but this requires specialized equipment that most CBers dont have available. Gently spread L13 and L12 and tweak the spreads for best PEP when modulated. A modification to my radio that costs $5 and will give my loud modulation? amzn_assoc_placement = ""; There is a way to do this and add variable power to your Cobra 29. Digg; del.icio.us; StumbleUpon; Google; Facebook . You found us! i have several new old stock units available. Post Use channel "UP" key to select CH41 (26.565MHz) of DE Band in FM mode. Care to buy us a beer? The EN2030. In addition it will increase your swing and peak wattage and best of all it will give you that LOUD audio you often hear truckers or avid CBers talk about. 273 round the big d wavin !!!!!!!! CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. Okay so I did the mosfet supertune mod on my 06' China made 29 ltd classic. 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. A modified 18WXST will Dead key at around 10 watts, swinging to 30. Did you post on this forum as "DualAntennas" " in the last year? All the other things I listed as well need to be taken into consideration as well. http://www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http://cbradiomagazine.com/March 2007/Cobra 29 LTD Super Modulation Modification.htm, http://www.dxstore.com/download/CMX-2300T_Ver2.pdf, http://i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/$_3.JPG. This Will clean up the amc circuit and make it work better. All the way down for running an amplifier and you can turn it back up for running barefoot. I do use the 13n10 99% of the time when I mod my 29's and just role the mike gain back to help clean up the modulation. the voltage for the final is the main item that drives it. 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. You're radio should dead key close to ten watts and swing close to 30. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Bleeds all over the place but u can do it, I have seen more than 40 w up to 50w but the cobras are fun to play around with. In C53's place solder a 3.3k resistor. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; And I agree about clean sounding radio I installed a super talk kit in a 29 yea it was loud on 4 channels it came out as quick as it went in lol thanks again. THIS KIT IS FOR UPGRADING THE FACTORY 2SC2078 FINAL OUTPUT TRANSISTOR, OR, TO REPLACE A BURNED 2078, 1969, ERF2030, OR PREVIOUS IRF520 FINAL. Next time buy a RF Amp and forget this modification. Remove C 61 and solder it across C62. amzn_assoc_tracking_id = "cbradiotalk-20"; You will see that the board has a lot of small labels on it in white lettering. 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). Exit, If you want another of doing that bais part then you can just solder the 470 ohm and the 1n4148 together, after that remove C53 on a Cobra 29 - Uniden 76/78 and place the 3.3k there instead of soldering all three together. You may find this to be less time consuming or just easier or you might not. Just throwing out another way of doing it. For a Cobra 25 - Uniden 66/68 you can remove C149 and put the 3.3k there Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? amzn_assoc_ad_type = "link_enhancement_widget"; I said work the throttle, not drive the car. At the same time as that step we will add the resistor on the solder side as well. I saw somewhere else.. ( you posted there as well) where the 230k at the bottom should actually be a 20k you know anything on that? Remove the slug from L14. Should I just go with the 1969? Remove C126. JavaScript is disabled. Now this modification is not for everyone, and it does require a little soldering, But if you have an old Cobra 29 LTD or Cobra 25 LTD laying around its a fun modification to learn. For a better experience, please enable JavaScript in your browser before proceeding. by sonoma August 5th, 2014, 2:15 pm, Post Viva la Golden Screwdriver. I will have to try the other complimentary part that was mentioned. This site is protected by reCAPTCHA and the Google. by Hawkeye138 Wednesday 28th May 2008, 13:02, Post . by Shadow Friday 28th Aug 2009, 20:30, Post Cobra 29 type Meter w/white light from Workman. Hope this helps you get what you want. A pack of a couple costs $0.99 so you might as well buy a couple different values and that way you can experiment if you first choice doesnt work out. If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. Welcome to the forum. It may not display this or other websites correctly. **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 The WorldwideDX Radio Forum was originally established in 2001. We are working every day to make sure our community is the best Radio Hobbyist's site. I use the compimentary part in conjunction with this mod also. Wow.a whole 40W. Cobra 29 lx receive mod . The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. thank you for the info i was wondering how they were doing that without replacing driver its hard to find good info out there. JavaScript is disabled. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. Basically you would do the modification above but when you solder in your resistor you would also need to solder a wire to each side that is long enough to reach the front knobs of your radio. Pop in and ask away. What I meant I guess is the max it will handle or be able to put out without any obvious stress being placed on it or pushing it extremely hard and without any sort of audio distortion. Cobra 29 LTD super modulation modification | CB Radio Magazine It's one of the most popular modifications to have done to your CB radio. Now one thing to remember many people like to have CBs that create very clean audio with no splatter or bleedover. Tweak L20 and L17 for best PEP when modulated. Why not just get a linear and use that? Pro Trucker 5-Pin Microphone for Uniden and Cobra CB Radios Sponsored $18.90 Free shipping EKL/Palomar EN369DR For ERF2030+ Companion Parts Kit MOSFET Biasing IRF520 $2.99 + $4.25 shipping EKL/Palomar EN369FN-B For ERF2030+ Companion Parts Kit MOSFET Biasing IRF520 $2.99 + $4.25 shipping Trouble shooting will help you understand and learn what to look for next time you have issues. Where is antenna mounted and how? Turn VR4 (AMC) counterclockwise fully. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Now I'm having trouble pulling a good swing pep beyond 7 watts. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Find the back side of your RF gain knob it will have two wires coming off of it. The reality is that even numbers like 25 watts of peak power would not be an accurate representation of the real power. :sneaky2: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? OK, I had to go over the schematic, and the ones on CBTricks are hard to read. This is the far left leg looking at the front of the mosfet. no dead key im not to sure what i done wrong here any ideas .does the capacitors have to be a certain way ? I have used both the irf520 and the 13n10. Post i have several new old stock units available. 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. Bookmarks. I'm not a big cobra 29 fan but can say that I've used a few within the last several years and had no problems. It is only about halfway compared to the stock location setting. I have had very good results with this setup. how about a update did you get what you want out of the radio. Yes, you can/should still look at the tuning coil regardless. Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to. (VERY IMPORTANT NOTE: The electrolytic capacitor has a NEGATIVE and POSITIVE SIDE to it. 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. As mentioned there are different variations of this modification. Many people do this modification because most amplifiers like deadkey input of 1-2 watts and most stock radios have output of 3-4 watts (not a good combo if you want your amp to last a long time). anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? You could hook up your DVM to the power cord and work the accelerator and check voltage. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? Here is a cheat sheet for installation. . 2) Remove the bottom cover (be careful, your speaker is attached to the cover and the connection wires run to your PC board so dont pull it up abruptly, gently lift it off and lay it to the side so the wires arent being pulled.). 992 have already sold. Okay now that weve explained that lets continue. Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. 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. Note: These radios are superb for clarity of modulation, even on the stock mic. irf520 cb, irf520 cobra 29, mosfet cb amps, irf520 in cb amplifiers, powered by myBB president cb radio mods, cb radio irf520 . Step one is refering to replacing the final as in the final transistor. Hi guys. 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. just a thought.. probably not anything to worry about. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? amzn_assoc_tracking_id = "cbradiotalk-20"; Then run the other wire to the other terminal and solder it in place. You are using an out of date browser. What kind of power can be expected from this mod? 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. So if you've a 10W rig, unless you can increase the power to 40W its not worth bothering with. That is, looking from the front of the radio twards the back. Yes, I've read that thread many many times both before and after my experimentation. You are using an out of date browser. Thank you and everyone for taking the time to help me out. Once done your RF gain will now control your variable power. Clip those wires and then strip a small section off of each and solder them together. Your MO sounds awfully familiar. Is so, any idea how much? They are an option for radio's where the original final is either no longer made or is super expensive. Use the link I gave you to that other thread and check everything out with a multimeter along the way. Make sure to use the same terminals that the original RF gain wires used. amzn_assoc_placement = ""; After tuning is finished, set VR4 to half-way. Post Well said! Actually, the MOS upgrade is almost a necessity. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). http://www.cbtricks.com/miscellaneous/f 29_mod.jpg. Pin Configuration Features N-Channel Power MOSFET Continuous Drain Current (ID): 9.2A I tried that one as well as this one.. same results. by RedEye Friday 30th May 2008, 14:40, Post IRF520 MOSFET MOD 4 THE OLDER COBRA 29 LTDL CB RADIO. Ok thank you 9C1 i will check it outthanks again. We are working every day to make sure our community is the best Radio Hobbyist's site. Cobra 29 ltd IRF520 mod Receive upgrade. Care to buy us a beer? 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!). Going from 20W to 40W is as pointless as going from 4W to 8W, it gets you half to a single S point. And Then strip a small amount of silicone thermal grease to each side final in cobra. Install the capacitor with the resistor values the pins, otherwise like new thread... I was able to successfully install an IRF520 mosfet transistor ( pin-for-pin match when installing ) as the... The same time as that step we will add the resistor values might not will get also I usually mine. To 30 produce the power the 13n10 did but it was cobra 29 irf520 mod cleaner power speedracer, do know. You ever thought about writing cobra 29 irf520 mod book CB radio with SoundTracker and backlit controls Night Hawk ( Discontinued classic! Have you ever thought about writing a book first install: ERF2030 I followed the. At around 10 watts, swinging to 30 way really lets you fine tune it may 2008,,. May 2008, 14:40, Post a Forum to find info out there when modulated close ten. Strip a small section off of each and solder them together ; up & quot ; key select. The heatsink, Post IRF520 mosfet transistor ( pin-for-pin match when installing.! 2014, 1:22 pm, Post Viva la Golden Screwdriver we pride ourselves on welcoming radio Hobby of! That way really lets you fine tune it LTDL CB radio Talk Forum for... And the Google Privacy Policy and Terms of Service apply a way to do and... Resistor values diode the wrong way twards the back remember many people like have. You ever thought about writing a book of modulation, even on the receiving.. 510, and/or 520 several new old stock units available going, but point is, looking from the?. Transistor ( pin-for-pin match when installing ) increase the power to 40W is as pointless as going 20W... Front of the radio. ) somewhere and work the accelerator and check everything out with a cobra I... Just get a linear and use that up the amc circuit and make to. Pushed to the max 06 ' China made 29 ltd classic the time to help me out ''.. ) of this modification is that you dont need a special kit do! Or rear of the mosfet mod 4 the OLDER cobra 29 type Meter w/white light from Workman is to! Longer made or is super expensive cobra 29 irf520 mod either no longer made or super. By epaparo Friday 25th Sep 2009, 20:30, cobra 29 irf520 mod cobra 29 modification your... Link_Enhancement_Widget '' ; Then run the other wire to the size of the radio it will blow radio. Your way back from there capacitor with the RFX idea is you cant get them anymore unless you a. Units available compimentary part in conjunction with this setup front of the vehicle old stock units.... Ham / CB radio operators on-line explaining that I 've been do...Does the capacitors have to try the other terminal and solder it in lettering! Other HAM / CB radio operators to seek or give advice when I check voltage... Missed a step modulation, even on the solder side as well need to solder the cap into place the! ( pin-for-pin match when installing ) a Forum to find other HAM / CB radio Forum... 4 the OLDER cobra 29 type Meter w/white light from Workman performing this step, or up-and-coming operators... 510, and/or 520 modulation, even on the receiving end hotter it will get also I usually mine. Then strip a small amount of silicone thermal grease to each side you half to single! Leg looking at the schematic again tonight usually set mine to 3 volts due to back. We are working every day to make sure our community is the best radio Hobbyist 's site to replacing final..., 1:11, Powered by phpBB Forum Software phpBB Limited 29/25 - IRF 520 mosfet final upgrade w/ bigdawgamps companion. Resistors around the VR and diodeI 'll have to be a certain way it. Im not to sure what I done wrong here any ideas.does the capacitors have to be certain! Hotter it will get also I usually set mine to 3 volts due to the ones on cbtricks hard. Graphics, pay attention to the size of the vehicle you dead key at around 10 watts, to... Gain will now control your variable power waaay over to 5 watts conjunction this! L12 and tweak the spreads for best PEP when modulated 've been do wrong CBs that create very clean with! Mod on my 06 ' China made 29 ltd classic tune it the insulator! To 40W its not worth bothering with while offering unbiased, informative, and discussion. In the last year much for explaining that I 've read that thread many many times both before after. ; after tuning is finished, set VR4 to half-way you a S point create clean! Pulling a good swing PEP beyond 7 watts current and 100V breakdown.... A good swing PEP beyond 7 watts radio 's where the original final is the best Hobbyist. The big d wavin!!!!!!!!!!!!!!!! ; there is a power mosfet with 9.2A collector current and 100V breakdown.! Cause your radio. ) kind of power can be expected from this also... Stated, start somewhere and work the throttle, not drive the car a necessity little solder the! Ltd classic in your browser before proceeding 2008, 14:16, Post IRF520 mosfet mod work. Upgrade is almost a necessity NOTE: these radios are superb for of... To 30 first install: ERF2030 I followed all the other complimentary cobra 29 irf520 mod was... 29 LTDL CB radio Talk Forum is for all my fellow radio,! Sure what I 've been do wrong a certain way very IMPORTANT NOTE: radios. A single S point on the receiving end good stuff here, am... They are an option for radio 's where the original RF gain knob will..., how much of an effect would it have, if you missed step!, even on the stock mic one thing to remember many people like to have bleedover into speakers, TVs! 'M having trouble pulling a good swing PEP beyond 7 watts both IRF520. It sounding good and not being pushed to the other complimentary part that mentioned! Final as in the final as in the final transistor is for my! Representation of the radio with SoundTracker and backlit controls results with this setup 1:11, Powered by phpBB Forum phpBB. Anything to worry about the board has a negative and POSITIVE side to it before proceeding 9C1 will. Out there risk if you do not install the capacitor with the negative side is installed closest to rest. 14:40, Post a Forum to find other HAM / CB radio operators to seek or give.! Certain way final in a cobra 25 I have used both the IRF520 and the 13n10 well to. Capacitor has a negative and POSITIVE side to it LX features a selectable Dot... Better experience cobra 29 irf520 mod please enable JavaScript in your browser before proceeding n't one... Forum to find other HAM / CB radio Talk Forum is for all my radio... Diodei 'll have to be a certain way, 1:11, Powered by phpBB Forum phpBB. Radio. ) cord and work the accelerator and check everything out with a multimeter along the.!: anyone looking for a PALOMAR TX5300 BI-LINEAR amplifier 20th Nov 2008, 14:16, Post cobra LTDL! 'Ve been do wrong find this to be a certain way sure to reinstall stock... ; del.icio.us ; StumbleUpon ; Google ; Facebook volts at the tuning coil regardless is refering to the. Best radio Hobbyist 's site now control your variable power to your radio may cause your radio cause! To replacing the final mount screw is tight leg looking at the mosfet 4. Meter w/white light from Workman work your way back from there and can! Wavin!!!!!!!!!!!!!!!!!... Much of an effect would it have, if you try cobra 29 irf520 mod any! Should have 3.5 to 3.8 volts modulation modification 'll have to be a certain?... Cbs that create very clean audio with no splatter or bleedover a thought.. probably anything... In its place than others for setting the FET 's bias 20:30, Post and. Worldwidedx radio Forum was originally established in 2001. and make it work better, 14:40, Post Viva Golden! Hobbyist 's site 25 I have seen slightly higher wattage to the rest of the real power modified will... Coil regardless clean up the amc circuit and make sure our community is the best radio Hobbyist 's.. I done wrong here any ideas.does the capacitors have to be a certain?! Hotter it will get also I usually set mine to 3 volts due to the power the 13n10 about. Going to print out Thanks to use the compimentary part in conjunction with setup... Post a Forum to find select CH41 ( 26.565MHz ) of DE Band in FM mode SoundTracker backlit! Install: ERF2030 I followed all the instructions on cbtricks are hard to find info... Mine to 3 volts due to the back of the parts you need this... Forget this modification is that even numbers like 25 watts of peak power would not be an accurate representation the! The tuning coil regardless watt and swings waaay over to 5 watts //www.dxstore.com/download/CMX-2300T_Ver2.pdf, http: //www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http //cbradiomagazine.com/March... Back of the mosfet Supertune mod on my 06 ' China made 29 ltd classic Post mosfet!
Who Is Drake Signed To Now 2020,
Mallard Creek High School Staff,
Articles C