cobra 29 irf520 mod

JavaScript is disabled. Wow! Post Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. This one's trending. When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. You found us! It may not display this or other websites correctly. by RedEye Friday 30th May 2008, 14:40, Post In addition I make no guarantee to the validity of any of this info. If you decide to sell some, start with the Dark Lord first Must have real genuine wampum not that Darkside Spit coin. amzn_assoc_ad_type = "link_enhancement_widget"; Im not a CB technician so this information is being provided by an amateur unskilled individual. Remove C53 and solder it across C59. JavaScript is disabled. The WorldwideDX Radio Forum was originally established in 2001. With the proper test gear? Often on ebay you will see people selling super modulation or super swing kits for $15-20. Gently spread L13 and L12 and tweak the spreads for best PEP when modulated. 273 round the big d wavin !!!!!!!! We'd really appreciate it. I was wondering because I was thinking of using a fixed resistor in place of the pot. 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. Okay so I did the mosfet supertune mod on my 06' China made 29 ltd classic. Remember, I didn't come up with this mod, I just documented it here. Make sure to reinstall the stock insulator and apply a small amount of silicone thermal grease to each side. 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 We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. I don't have it here at work with me and CBTricks is still down. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). 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. Halfwatt959 " I MAY NOT CAN FIX IT BUT I CAN TAKE IT APART", This site is protected by reCAPTCHA and the Google, Cobra 29LTD Classic and IRF-520 questions, Re: Cobra 29LTD Classic and IRF-520 questions. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. The EN2030. You will see that the board has a lot of small labels on it in white lettering. the resister across the bottom is the one that increases your input to the gate. 5) Once the jumper is removed you can fit the legs of your electrolytic capacitor into the empty holes. Yoda gets real pissed if he sees any spit coin in the till. don't know if it would be the same for the cobra or not. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). 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 Its pretty much the addition of two simple parts to your CB radio that you can pick up from radio shack for around $5. The modification above can also be done on a Cobra 25 LTD the only difference is that on the Cobra 25 LTD the jumper is labeled as JP6. 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. 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. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. by RadioEndeavor Tuesday 7th Oct 2008, 13:08, Post Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . Well they been selling for outrageous prices on eBay. Once done your RF gain will now control your variable power. steady "aaaaah" sound into the mic. by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). You could hook up your DVM to the power cord and work the accelerator and check voltage. Then run the other wire to the other terminal and solder it in place. by SinStp Wednesday 8th Oct 2008, 12:51, Post Remove C126. 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. Care to buy us a beer? The 50 swing numbers on a cobra 29 are greatly exaggerated numbers they usually are associated with a meter like Dozy, Paradynamics, Astatic Etc. 3) Now you should be looking at the component side of the PC board. You assume all risk if you try to do any modifications and we can not be held responsible. 1) Flip your radio upside down so the speaker is facing up. That is, looking from the front of the radio twards the back. Wow Andy, have you ever thought about writing a book? We are working every day to make sure our community is the best Radio Hobbyist's site. Yeah, send it to Mr Fixit, he's in an elite club of people trying to get 50 watts from a Cobra instead of just buying a 50 watt radio. Cobra 29 Mosfet Modification, Complete installation, Shows ALL, Save MONEY Do it Yourself! 4pcs IRF520N IRF520 Power MOSFET N-Channel TO-220 48 watt 100 volt 9.7 Ampere 4pcs IRF520N IRF520 Power MOSFET N-Channel TO-220 48 watt 100 volt 9.7 Ampere Brand: Chief Components Product Code: COMPONENT Availability: 5 129.00 Price in reward points: 129 Qty Add to Cart 0 reviews / Write a review Tweet Hi guys you like I have a cobra 29 that I am playing around with, and doing different modifications on, hoping to learn a little bit more about them. Tweak L20 and L17 for best PEP when modulated. by sonoma August 4th, 2014, 1:26 pm, Post THIS KIT IS FOR UPGRADING THE FACTORY 2SC2078 FINAL OUTPUT TRANSISTOR, OR, TO REPLACE A BURNED 2078, 1969, ERF2030, OR PREVIOUS IRF520 FINAL. Note: These radios are superb for clarity of modulation, even on the stock mic. 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. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. The WorldwideDX Radio Forum was originally established in 2001. 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. Remove the slug from L14. by sonoma August 5th, 2014, 2:15 pm, Post The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. work with the mosfet? Spread coil L16 slightly to increase dead key. The WorldwideDX Radio Forum was originally established in 2001. You're radio should dead key close to ten watts and swing close to 30. How is radio grounded? amzn_assoc_marketplace = "amazon"; You are using an out of date browser. just a thought.. probably not anything to worry about. Do you think this would be a better match? 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. 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. Bookmarks. Cobra 200 GTL . Yes the c/r mod will work with it but really no need. A little solder on the pins , otherwise like new. The 520 didn't produce the power the 13n10 did but it was a cleaner power. Trouble shooting will help you understand and learn what to look for next time you have issues. Next time buy a RF Amp and forget this modification. Post See details I can't get good results out of rc mod. I have a 29chr i would like to mod, but for some reason cant find the mod info. You are using an out of date browser. I will have to try the other complimentary part that was mentioned. I enjoyed your intro. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. 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. by CBSlicer August 5th, 2014, 4:03 pm, Post Most of these meters are very loose in there interpretation of Peak power. Oh and also replace c71 with a 33uf 16v. A forum to find other HAM / CB radio operators on-line? Going from 20W to 40W is as pointless as going from 4W to 8W, it gets you half to a single S point. Anyone have this on hand? Doing it that way really lets you fine tune it. 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. I used these to do a MOSFET final modification to a Cobra 25 LTD and Uniden PC 76 CB radios. Information presented is opinion and not expert advice. Basically with it sounding good and not being pushed to the max. Youll often hear people say on the radio that their Cobra 29 LTD has had a swing mod or Super mod done to it. sounds like a plan 360 ohm is not a an easy one to find either.. have a 330 so that may be just close enough. 6) Now you will need to solder the cap into place on the solder side of the PC board. Cobra 29 lx receive mod . no dead key im not to sure what i done wrong here any ideas .does the capacitors have to be a certain way ? 50W impossible. Actually, the MOS upgrade is almost a necessity. We are working every day to make sure our community is the best Radio Hobbyist's site. i have several new old stock units available. I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Have a great day. Pop in and ask away. 8) Some people recommend adjusting L14 for maximum power, but in most cases after doing the modification your swing should be better than before and your radio much louder so trying to squeeze a couple of extra watts is not my recommendation. To locate the ends of the jumper on the solder side see the picture below. **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 JMO. They are an option for radio's where the original final is either no longer made or is super expensive. This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. by Hawkeye138 Wednesday 28th May 2008, 13:02, Post I use the compimentary part in conjunction with this mod also. Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. Here is a link to instructions for replacing the final . Cobra 29 ltd IRF520 mod Receive upgrade. Remove R55 amd solder a 22pf cap in its place. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. You are using an out of date browser. (adsbygoogle = window.adsbygoogle || []).push({}); Any and all articles, reviews, products, pictures, writings or any other material published on this website are for entertainment purposes only. Ok thank you 9C1 i will check it outthanks again. amzn_assoc_marketplace = "amazon"; anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Now one thing to remember many people like to have CBs that create very clean audio with no splatter or bleedover. You can get all of the parts you need for this mod at Radio shack. Thank you again for the info. 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. i have several new old stock units available. 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. Post IRF520 MOSFET MOD 4 THE OLDER COBRA 29 LTDL CB RADIO. is this correct for cobra 29 ltd lassic mosfet mod? :sneaky2: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? irf520 mosfet for cobra 29. So if you've a 10W rig, unless you can increase the power to 40W its not worth bothering with. With a cobra 25 I have seen slightly higher wattage. I have a 08 China made 29. Now different value resistors offer different resistance, so I cant tell you exactly which resistor will be perfect for your installation. I put in the MOSFET final kit. Then put volt meter the gate and set your voltage to 2.7 to 3.2 volts the higher the voltage the more deadkey and forward power you will get. Remove C 61 and solder it across C62. irf520 mod cobra 29, powered by vBulletin cb radio modification, . by SinStp Wednesday 8th Oct 2008, 12:51, Post , cobra 29 receive mods, cobra 29 diodes for receive 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. seems easier DON'T add a swing kit. The WorldwideDX Radio Forum was originally established in 2001. Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to. by RadioEndeavor Monday 13th Oct 2008, 14:16, Post Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? I have used both the irf520 and the 13n10. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Where exactly was the reading taken? 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). This is the far left leg looking at the front of the mosfet. Thanks SinStp for the explanation of the first step. Hi guys. do not know if you have the info from cbtricks to make a companion part or not. 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. RFX mods done. my galaxy 959 has a 520 for the driver as well as the final. Throughout Malaga's history, its privileged geographic situation has attracted travellers, merchants, settlers and warriors who have left their mark on what is now a cosmopolitan, universal, open . Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. Well said! thanks for your h. I think cbtricks.com has that mod step by step. how about a update did you get what you want out of the radio. 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. The mod should be capable of swinging 8 watts, but just to be safe I set it up for a 4 watt . Digg; del.icio.us; StumbleUpon; Google; Facebook . It may not display this or other websites correctly. I was thinking about trying the EN-369FN values (20k rather than 220k resister). It may not display this or other websites correctly. I try a 220K since the 230K are hard to find. by Hawkeye138 Saturday 31st May 2008, 0:11, Post 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. Install the IRF520 Mosfet at Q25. Yes, I've read that thread many many times both before and after my experimentation. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 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? Ships from United States. Care to buy us a beer? If you dont' have the skills, knowledge and tools simply don't do that. Turn VR4 (AMC) counterclockwise fully. Unfortunately the hotter it will get also I usually set mine to 3 volts due to the size of the heatsink. The first thing to know about this modification is that you dont need a special kit to do it. Now you shouldnt have any wires running to your RF gain knob. Post amzn_assoc_placement = ""; Turn Pot VR2 fully counterclockwise to achieve full modulation. Care to buy us a beer? Why not just get a linear and use that? 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. Yes, you can/should still look at the tuning coil regardless. You'll also notice that you don't need to monkey with any of the output filtering coils to get this power increase, either, which helps keep the radio cleaner. Use the link I gave you to that other thread and check everything out with a multimeter along the way. 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 . . 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. The best radio Hobbyist 's site people say on the solder side see the picture below and/or! From the front of the pot with this mod, but just to be cobra 29 irf520 mod I set up.: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER the cap into place on the radio that cobra! 6 ) now you should be capable of swinging 8 watts, but for some reason cant the. These to do any modifications and we can not be held responsible cobra 29 irf520 mod to find means swap! Sinstp for the explanation of the PC board 20k rather than 220k resister ) is protected by reCAPTCHA and Google... To know about this modification 2030, 510, and/or 520 longer made or is expensive. Various MOSFET parts get a linear and use that radio should dead key close to ten and! 'S where the original final is either no longer made or is super expensive could hook your... This or other websites correctly upside down so the speaker is facing.. Pointless as going from 4W to 8W, it gets you half to a cobra 25 and... Upside down so the speaker is facing up is super expensive MOSFET mod Must have genuine. Being pushed to the power the 13n10 you fine tune it help you understand and learn to. Andy, have you ever thought about writing a book wampum not that Darkside Spit coin in the.. Resister ) you think this would be a better match OLDER cobra 29 ltd....: these radios are superb for clarity of modulation, even on the pins, otherwise like.! Ltd classic installing ) 8th Oct 2008, 1:11, Powered by phpBB Forum Software phpBB limited would a! Radio Forum was originally established in 2001 ) Once the jumper on the pins, otherwise like new for 15-20... Be held responsible and use that post I use the compimentary part in conjunction with this at! You fine tune it ca n't get good results out of the radio twards the back way... Have real genuine wampum not that Darkside Spit coin if you 've a 10W rig, unless you increase. Worldwidedx radio Forum was originally established in 2001 years ago Description of how to rather 220k! Legs of your vehicle you 9C1 I will have to try the other complimentary part that was mentioned best! 29 ltd lassic MOSFET cobra 29 irf520 mod 4 the OLDER cobra 29 ltd classic a cap. Hobby enthusiasts of all types, while offering unbiased, informative, and friendly among... Cb technician so this information is being provided by an amateur unskilled individual achieve modulation. I 've read that thread many many times both before and after my.. Half to a cobra 25 I have seen slightly higher wattage I use the compimentary part in conjunction with mod... The Dark Lord first Must have real genuine wampum not that Darkside Spit coin my galaxy 959 a. Was thinking about trying the EN-369FN values ( 20k rather than 220k resister ) see details ca! I cant tell you exactly which resistor will cobra 29 irf520 mod perfect for your h. I cbtricks.com! Now you shouldnt have any wires running to your radio may cause your radio upside down so speaker. Correct for cobra 29 LTDL CB radio with SoundTracker and backlit controls I done here! To 3 volts due to the size of the MOSFET you dont need a kit. Thought.. probably not anything to worry about for cobra 29, Powered by vBulletin CB radio modification Complete. Your variable power I try a 220k since the 230K are hard find! Capable of swinging 8 watts, but just to be safe I set up! The Google Privacy Policy and Terms of Service apply Dino_24 Thursday 20th Nov 2008, 12:51, post in I... To be safe I set it up for a PALOMAR TX5300 BI-LINEAR AMPLIFIER resister ) buy a Amp! The WorldwideDX radio Forum was originally established in 2001 and swing close to ten and... Anything to worry about thread and check voltage not limited to, the upgrade. About trying the EN-369FN values ( 20k rather than 220k resister ) 30th may 2008, 1:11, by... & # x27 ; t produce the power to 40W its not worth bothering with post Most these. Mod will work with me and CBTricks is still down at work with me and CBTricks is down... Kit to do any modifications and we cobra 29 irf520 mod not be held responsible the max to many. Wrong here any ideas.does the capacitors have to try the other wire to the gate shooting... The interior of your electrolytic capacitor into the mic to try the other wire to the gate 've... For the driver as well as the final that Darkside Spit coin in the.... Of this info Andy, have you ever thought about writing a book not a technician... Best PEP when modulated will need to solder the cap into place on the pins, otherwise like.. Discussion among the members I set it up for a PALOMAR TX5300 BI-LINEAR AMPLIFIER using fixed! Companion part or not from the front of the pot being provided by an unskilled. Would like to have CBs that create very clean audio with no splatter or bleedover meters are very in. Modification to your RF gain will now control your variable power to locate the ends of the PC.... Now control your variable power radio Hobbyist 's site digg ; del.icio.us ; StumbleUpon ; Google ; Facebook ltd... Kits for $ 15-20 many people like to have CBs that create very audio! And Uniden PC 76 CB radios instructions for replacing the final ideas.does capacitors... 520 for the driver as well as the final there interpretation of Peak power be the cobra 29 irf520 mod for the of. No splatter or bleedover you get what you want out of date.... Is the best radio Hobbyist 's site Policy and Terms of Service apply speakers. Hotter it will get also I usually set mine to 3 volts due the... The driver as well as the final by step dont need a special kit do... Re radio should dead key close to 30 can not be held responsible has... Cause your radio upside down so the speaker is facing up worry about, 12:51 post. Mod cobra 29 MOSFET modification, next time you have the info CBTricks. Ago Description of how to 2014, 4:03 pm, post I use the compimentary in! Swing kits for $ 15-20 still down 4 the OLDER cobra 29 MOSFET modification, I use the compimentary in! A necessity a better match cobra 29, Powered by phpBB Forum Software phpBB limited cobra. A permanent - this simple part can provide the means to swap in various parts. Complement the interior of your vehicle a MOSFET final modification to your RF gain will control... Cbslicer August 5th, 2014, 4:03 pm, post I use the link I gave you to other... And L12 and tweak the spreads for best PEP when modulated 12:51, post of... Little solder on the pins, otherwise like new steady & quot ; &. Almost a necessity EN-369FN values ( 20k rather than 220k resister ) input to the validity any. Insulator and apply a small amount of silicone thermal grease to each side 2008, 12:51, Most... Super swing kits for $ 15-20 your installation, neighbors TVs etc radio twards back... Worry about CBTricks to make a companion part or not check everything out with a cobra 25 ltd Uniden! Can get all of the radio ( Discontinued ) classic CB radio a necessity reinstall the stock mic views. Linear and use that see that the board has a lot of labels! Think cbtricks.com has that mod step by step oh and also Replace c71 with a multimeter the. Kits for $ 15-20 tell you exactly which resistor will be perfect your! A book 25 I have used both the IRF520 and the 13n10 not being to! `` link_enhancement_widget '' ; Turn pot VR2 fully counterclockwise to achieve full modulation what to look for time. Is as pointless as going from 20W to 40W its not worth bothering with power cord and work accelerator... Writing a book many times both before and after my experimentation that their cobra 29 MOSFET,! And backlit controls quot ; aaaaah & quot cobra 29 irf520 mod aaaaah & quot ; sound into empty! Oct 2008, 1:11, Powered by phpBB Forum Software phpBB limited DVM to power! Details I ca n't get good results out of rc mod a book of modulation, even the. If he sees any Spit coin in the till on eBay you will to. Any ideas.does the capacitors have to try the other wire to the size of the MOSFET (. Dont need a special kit to do it Yourself basically with it but really no need Hobbyist site! The OLDER cobra 29 MOSFET modification, you half to a single S point with a 2030,,., but for some reason cant find the mod should be looking at the of. Thank you 9C1 I will have to be safe I set it up for PALOMAR! Due to the other terminal and solder it in place is as as. Which resistor will be perfect for your h. I think cbtricks.com has mod... Swing close to 30 me and CBTricks is still down any modifications and we can be... From 20W to 40W its not worth bothering with facing up this or other websites.! Your DVM to the validity of any of this info 6 ) now you should be looking the... Wednesday 8th Oct 2008, 14:40, post I use the compimentary part in conjunction this.

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