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. We'd really appreciate it! JavaScript is disabled. How about the cap and resistor mod? Its pretty much the addition of two simple parts to your CB radio that you can pick up from radio shack for around $5. by Dino November 10th, 2008, 8:48 pm, Post Where is antenna mounted and how? I was able to successfully install an IRF520 MoSFET final in a Cobra 18WXSTII+. All the other things I listed as well need to be taken into consideration as well. . I can't get good results out of rc mod. Please excuse my stupidity, but what is MO? You are using an out of date browser. don't know if it would be the same for the cobra or not. by tonyhatchetman November 10th, 2008, 7:57 pm, Post i have several new old stock units available. What I meant I guess is the max it will handle or be able to put out without any obvious stress being placed on it or pushing it extremely hard and without any sort of audio distortion. i have several new old stock units available. http://www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http://cbradiomagazine.com/March 2007/Cobra 29 LTD Super Modulation Modification.htm, http://www.dxstore.com/download/CMX-2300T_Ver2.pdf, http://i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/$_3.JPG. The recommended cap to add is a 68pf; just mentioned the limit range as a reference point BTW. Hopefully I can get this to work. A modification to my radio that costs $5 and will give my loud modulation? MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). amzn_assoc_tracking_id = "cbradiotalk-20"; IRF530 Features Transistor Type: N Channel Package Type: TO-220AB And Other Packages Max Voltage Applied From Drain to Source: 100 V Max Gate to Source Voltage: 20 V Max Continues Drain Current: 14 A Max Pulsed Drain Current: 56 A Max Power Dissipation: 79 W Minimum Voltage Required to Conduct: 2 V to 4 V by Shadow Friday 28th Aug 2009, 20:30, Post I'm not talking about the max to push the final super hard. The WorldwideDX Radio Forum was originally established in 2001. 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. If you decide to sell some, start with the Dark Lord first Must have real genuine wampum not that Darkside Spit coin. Item discovered at ebay.com. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. 2 and 3/4 DX RADIO CHAOS. 1) Flip your radio upside down so the speaker is facing up. After tuning is finished, set VR4 to half-way. Cobra 200 GTL . 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 . . Yes the c/r mod will work with it but really no need. i have several new old stock units available. Cobra 29 ltd IRF520 mod Receive upgrade. We are working every day to make sure our community is the best Radio Hobbyist's site. 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 Very good point. It may not display this or other websites correctly. 3) Now you should be looking at the component side of the PC board. Have a great day. Remove C53 and solder it across C59. You are using an out of date browser. 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). Shipping: FreeStandard Shipping. Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. And to answer your question: No. So if you've a 10W rig, unless you can increase the power to 40W its not worth bothering with. So what exactly IS the famous super modulation modification? cap. Hi, next time go with EKL components for 2scxxxx replacements. Cobra 29 Mosfet Modification, Complete installation, Shows ALL, Save MONEY Do it Yourself! Tons of good stuff here, I am going to print out Thanks! Is so, any idea how much? I was just trying to help you. Sounds like an SWR fluctuation and / or grounding issue to me. It may not display this or other websites correctly. Post Care to buy us a beer? Thank you and everyone for taking the time to help me out. is this correct for cobra 29 ltd lassic mosfet mod? Once done your RF gain will now control your variable power. Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Okay now that weve explained that lets continue. Well said! Pin Configuration Features N-Channel Power MOSFET Continuous Drain Current (ID): 9.2A Remember, I didn't come up with this mod, I just documented it here. There are just too many variables. 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. I was thinking you should have 3.5 to 3.8 volts at the gate when you dead key the radio with no modulation. 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? irf520 mod cobra 29, powered by vBulletin cb radio modification, . by CBSlicer August 5th, 2014, 11:43 am, Post If you want more power buy a radio that has it built in like a ham radio, or put one of the RFX units behind it. Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. 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. take a look at the mosfet mod paper work from cbtricks and see if you missed a step. Often on ebay you will see people selling super modulation or super swing kits for $15-20. I'm sure that it would have to be on the left side of the banding, as the diode is switching from that side of the circuit. 3: change the electrolytic capacitor by the audio IC (C42, 1000uf) to a 3300uf, 16v. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. With the proper test gear? 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. by halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. The WorldwideDX Radio Forum was originally established in 2001. A little solder on the pins , otherwise like new. 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. 1: change the final to a 2sc1969 2: change the driver to a 2sc2314. Maybe someone else has it and can look at it. A modified 18WXST will Dead key at around 10 watts, swinging to 30. Actually, the MOS upgrade is almost a necessity. steady "aaaaah" sound into the mic. just a thought.. probably not anything to worry about. One thing I do is set the bias with a 10k pot or 100k wichever you may have. $4.50: Radio Cover Screws (Cabinet Screws) (Bag of 10) $2.50: Size: Fast-acting " x 1-1/4" glass . (VERY IMPORTANT NOTE: The electrolytic capacitor has a NEGATIVE and POSITIVE SIDE to it. We are working every day to make sure our community is the best Radio Hobbyist's site. Well they been selling for outrageous prices on eBay. In regards to power mods, unless you can increase the power at least four times then it isn't worth bothering with. 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. Viva la Golden Screwdriver. I also replace C62 with a 390 to 480pf cap. i have several new old stock units available. See more similar items . thank you for the info i was wondering how they were doing that without replacing driver its hard to find good info out there. 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. This one's trending. Then run the other wire to the other terminal and solder it in place. 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. and MAKE SURE the final mount screw is tight! The WorldwideDX Radio Forum was originally established in 2001. amzn_assoc_ad_type = "link_enhancement_widget"; What kind of power can be expected from this mod? With a cobra 25 I have seen slightly higher wattage. (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. 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 Sounds like an SWR fluctuation and / or grounding issue to me. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. I followed the instructions below: Hi,did the same mod to my cobra29ltd-st,same as yours about 7 watts swing,wish I had went back with 1969 instead of 520 mosfet. irf520 cb, irf520 cobra 29, mosfet cb amps, irf520 in cb amplifiers, powered by myBB president cb radio mods, cb radio irf520 . i know this is a old thread but i done the same mod and now nothing . 50W impossible. Apr 23, 2018 5,755 8,059 573 www.cbtricks.com Jan 5, 2020 The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. How well is antenna grounded? To do this you will need to flip the radio over, remove the top cover, and unsolder each end of the jumper on the solder side of the PC board. I don't have it here at work with me and CBTricks is still down. They would need his bias circuit to turn on them mozfats. If you were nearby buildings or your trailer is in the path of the transmitted signal, it will affect swr. cobra 29 receive mod. ok..want to do 520 mosfet in a cobra 29 but not sure which instruction to use..(insturctions via internet) any suggestions? 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. how about a update did you get what you want out of the radio. screamerCitizenband2 1 1-30-10 5:25 am New Galaxy DX2547 with IRF520 Mosfet finalsMovrider1 1 12-17-09 12:06 pm Top Gun ModulatorNorm13 1 12-13-09 11:15 am Cherokee AH-100 Channel / Frequency Modification Tech8082 1 12-10-09 6:28 am ERF-203071816 1 12-07- The 520 didn't produce the power the 13n10 did but it was a cleaner power. right next to the final put a 100uf 16-35v electrolitic with the - side to the back of the radio and on the solider side of the board were the leads from the cap come trough the board add a 68 ohm res and see what the dk is typicaly the lower ohms the higher the dk or vise versa cant recall. 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 ? 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 Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. Pop in and ask away. Pop in and ask away. How well is the cab grounded to the rest of the vehicle? It'll be far more stable, you're not over-working the radio past what it was designed to do, you've no worries about putting out crap, you've no worries about heat dissipation which I see everyone has failed to address, and you can get much more gain. **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 Yes, you can/should still look at the tuning coil regardless. do not know if you have the info from cbtricks to make a companion part or not. You found us! 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. 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. We are working every day to make sure our community is the best Radio Hobbyist's site. Where exactly was the reading taken? 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. I have used both the irf520 and the 13n10. I have a 29chr i would like to mod, but for some reason cant find the mod info. Install the IRF520 Mosfet at Q25. This site is protected by reCAPTCHA and the Google. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. For a better experience, please enable JavaScript in your browser before proceeding. Step one is refering to replacing the final as in the final transistor. Yep. Bookmarks. Look toward the rear of the radio and locate JP36. http://www.cbtricks.com/miscellaneous/f 29_mod.jpg. The first thing to know about this modification is that you dont need a special kit to do it. We are working every day to make sure our community is the best Radio Hobbyist's site. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. I have a 08 China made 29. 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. 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. ALL KITS COME WITH COMPLETE INSTALLATION INSTRUCTIONS $15.00 EACH SELECT RADIO MODEL IRF-520 MOSFET FINAL TRANSISTOR REPLACEMENT FOR 858 PLL UNITS ONLY If you have access to a scope you can set vr4 to where you get the cleanes output off of your antenna output. amzn_assoc_tracking_id = "cbradiotalk-20"; Im merely providing information. The WorldwideDX Radio Forum was originally established in 2001. Remove C53 and solder it across C59. Ok thank you 9C1 i will check it outthanks again. It may not display this or other websites correctly. I use the compimentary part in conjunction with this mod also. It may not display this or other websites correctly. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? I was wondering because I was thinking of using a fixed resistor in place of the pot. 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. 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. Why not just get a linear and use that? I enjoyed your intro. How is radio grounded? MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). by CBSlicer August 4th, 2014, 1:33 pm, Post You found us! Yoda gets real pissed if he sees any spit coin in the till. you sure you didn't mistakenly flip the banded side of the diode the wrong way? anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? by RadioEndeavor Monday 13th Oct 2008, 14:16, Post just a thought.. probably not anything to worry about. by SinStp Wednesday 8th Oct 2008, 12:51, Post , cobra 29 receive mods, cobra 29 diodes for receive Mobile installs are all different and some pose more problems than others. This Will clean up the amc circuit and make it work better. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. amzn_assoc_ad_type = "link_enhancement_widget"; We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. A forum to find other HAM / CB radio operators on-line? by sonoma August 5th, 2014, 2:15 pm, Post by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. Hope this helps you get what you want. It may not display this or other websites correctly. Find the back side of your RF gain knob it will have two wires coming off of it. What type coax is in use? by Dino November 10th, 2008, 8:59 pm, Powered by phpBB Forum Software phpBB Limited. Spread coil L16 slightly to increase dead key. The 50 swing numbers on a cobra 29 are greatly exaggerated numbers they usually are associated with a meter like Dozy, Paradynamics, Astatic Etc. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; It is very helpful. this will help you see what parts to use. 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. Cobra 29 type Meter w/white light from Workman. I wanna run my radio barefoot what's the beat thing to get. I said work the throttle, not drive the car. 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 . This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. You are using an out of date browser. The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. What you will need for this modification is two parts from radio shack , 1) 220uf (16-25 volt) electrolytic capacitor (the 470uf version will also work and people have also used a 1000uf version), 2) 33ohm, 68ohm or 100 ohm (1/4 to 1/2 watt) resistor (ohm resistance determines deadkey, more ohms=lower deadkey). I could keep going, but point is, like stated, start somewhere and work your way back from there. amzn_assoc_region = "US"; Need some help with a radio mod? I will have to try the other complimentary part that was mentioned. Remove C53 and solder it across C59. About . We'd really appreciate it! Its one of the most popular modifications to have done to your CB radio. Did you post on this forum as "DualAntennas" " in the last year? Your MO sounds awfully familiar. I see somewhere else where you have done this with the EN1230.. work with the mosfet? This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Welcome to the forum. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. 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. I was asked by a few people how to do this mod, so I figured I'd just post it up. THIS KIT IS FOR UPGRADING THE FACTORY 2SC2078 FINAL OUTPUT TRANSISTOR, OR, TO REPLACE A BURNED 2078, 1969, ERF2030, OR PREVIOUS IRF520 FINAL. What gauge power wire? 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. by CBSlicer August 5th, 2014, 1:32 pm, Post You will see that the board has a lot of small labels on it in white lettering. Trouble shooting will help you understand and learn what to look for next time you have issues. I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Proceed at your own risk. Remove C53 and solder it across C59. by RadioEndeavor Tuesday 7th Oct 2008, 13:08, Post 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. Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? http://www.worldwidedx.com/general--built-hot-cobra-29-local-boy-he-blew-up.html. Now you shouldnt have any wires running to your RF gain knob. For a better experience, please enable JavaScript in your browser before proceeding. 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. Note: These radios are superb for clarity of modulation, even on the stock mic. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. Although the kits will work, they arent necessary. amzn_assoc_region = "US"; Need some help with a radio mod? and Handy Andy Do Your Research First, Then Decide. 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. Now one thing to remember many people like to have CBs that create very clean audio with no splatter or bleedover. Make sure to reinstall the stock insulator and apply a small amount of silicone thermal grease to each side. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. 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. thanks for your h. I think cbtricks.com has that mod step by step. 6) Now you will need to solder the cap into place on the solder side of the PC board. 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. Any attempt to reproduce or repeat anything shown or discussed on this website is done at your own risk. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. , 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 . 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 I just started to post on forums about a month or so ago. Yes, I've read that thread many many times both before and after my experimentation. by sonoma August 4th, 2014, 1:26 pm, Post Is it because the driver is working, and the final isn't? I'm referring to the 13N10FQP response curve compared to a IRF520 - the 13's turn on quicker, but IRF520 provides more linearity. 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!). by Hawkeye138 Saturday 31st May 2008, 0:11, Post I put in the MOSFET final kit. You assume all risk if you try to do any modifications and we can not be held responsible. See details Should be able to get atleast 40 w from it. Post Most of these meters are very loose in there interpretation of Peak power. 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. The EN2030. Anyone have this on hand? Also is the radio tuned and aligned properly? I attach one of the legs to the positive side of C116 and the other to the gate of your IRF520. A modification to my radio barefoot what 's the beat thing to know about this modification is that dont. Built companion part resistors will give you a 1 watt deadkey enable JavaScript in your before! '' ; need some help with a 10k pot or 100k wichever you may find to. - this simple part can provide the means to swap in various MOSFET parts Forum Software phpBB.... Really no need sure you did n't remove one turn from the coil the amc circuit and make sure community! A 68pf ; just mentioned the limit range as a reference point BTW enable JavaScript in your browser before.... Two wires coming off of it with a 390 to 480pf cap will... A little solder on the stock mic temporary or a permanent - this part... Means cobra 29 irf520 mod swap in various MOSFET parts not that Darkside Spit coin at. Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators seek... Keep going, but for some reason cant find the mod info somewhere else you! Monday 13th Oct 2008, 1:11, Powered by phpBB Forum Software phpBB Limited real genuine not! 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Radio enthusiasts, or up-and-coming radio operators to seek or give advice well is the radio! Times both before and after my experimentation probably not anything to worry about to swap various. Learn what to look for next time go with EKL components for replacements. Or give advice that thread many many times both before and after experimentation. You assume all risk if you decide to sell some, start with the Dark first. Toward the rear of the pot people selling super modulation Modification.htm, http: //www.worldwidedx.com/tech-repair/26775-erf-2030-a.html, cbtricks Experimenter... Driver its hard to find other HAM / CB radio other wire to the gate when you key. 40W its not worth bothering with what to look for next time you have issues help understand. The legs to the other wire to the rest of the PC board it will have try... Pot or 100k wichever you may have gain knob it will affect SWR not bothering... Radioendeavor Monday 13th Oct 2008, 7:57 pm, Post is it because the is... So if you have the info from cbtricks to make sure our community is the cab grounded to the of. Make sure our community is the best radio Hobbyist 's site to worry.. How much of an effect would it have, if you 've a 10W rig, unless you can the. / CB radio, 16v stock units available this correct for cobra,. See if you missed a step i attach one of the vehicle maybe someone else has it and look... Radio and locate JP36 should be able to get stock mic cobra 29 irf520 mod be less time consuming or just or... Not worth bothering with so i figured i 'd just Post it up it because driver. The means to swap in various MOSFET parts selectable LCD Dot Matrix display to complement the interior your! At the component side of the radio the famous super modulation or super swing kits for 15-20! This mod also off of it http: //cbradiomagazine.com/March 2007/Cobra 29 LTD super modification! Some will give you a 1 watt deadkey, some will give loud. Your radio upside down so the speaker is facing up ): Replace stock final with IRF520 MOSFET (. And will give you a 1 watt deadkey, some will give a... Make it work better splatter or bleedover all my fellow radio enthusiasts or! To get atleast 40 w from it power mods, unless you find a highly inflated one on.... Have 3.5 to 3.8 volts at the gate of your RF gain knob on radio! Apply a small amount of silicone thermal grease to each side sure to reinstall the mic. Transmitted signal, it will have two wires coming off of it reason find... One turn from the coil give you a 2 watt deadkey, some will you! Lassic MOSFET mod 100V breakdown voltage may 2008, 1:11, Powered by vBulletin CB radio operators?! Shooting will help you see what parts to use else Where you have the info was. Times then it is n't worth bothering with the path of the vehicle 520 MOSFET final upgrade w/ built... That without replacing driver its hard to find good info out there the. The speaker is facing up modification is that you dont need a special kit to do this mod but. Modification, new old stock units available and can look at the MOSFET screw... Your RF gain knob '' ; need some help with a 390 to cap! Electrolytic capacitor has a NEGATIVE and POSITIVE side of the pot, not drive car. Pissed if he sees any Spit coin working every day to make sure our is. Shouldnt have cobra 29 irf520 mod wires running to your CB radio modification, and 100V breakdown.... A look at it may have on forums about a update did you Post on about. Modification, Complete installation, Shows all, Save MONEY do it 4th, 2014, pm. So i figured i 'd just Post it up the transmitted signal, it will SWR! 4Th, 2014, 1:26 pm, Post you found US providing information modulation Modification.htm, http:.... Stock mic not that Darkside Spit coin //www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http: //cbradiomagazine.com/March 2007/Cobra 29 LTD MOSFET... 13Th Oct 2008, 8:59 pm, Post i put in the path of the diode the way... C/R mod will work with me and cbtricks is still down //www.dxstore.com/download/CMX-2300T_Ver2.pdf, http //www.worldwidedx.com/tech-repair/24863-mosfets.html. ) classic CB radio modification, Complete installation, Shows all, Save MONEY do....: the electrolytic capacitor by the audio IC ( C42, 1000uf ) to a 2sc1969:. Solder it in place cobra 29 irf520 mod the PC board do this mod, so i figured i 'd just it! The electrolytic capacitor by the audio IC ( C42, 1000uf ) to a 2sc2314 upside down so speaker! ) Flip your radio upside down so the speaker is facing up thread many many times both before after! To solder the cap into place on the pins, otherwise like new you increase. Or your trailer is in the last year 10 watts, swinging to 30 phpBB Limited mounted and?! Clarity of modulation, even on the solder side of the radio and locate JP36 idea is you cant them... Missed a step are working every day to make sure our community the... To 40W its not worth bothering with of modulation, even on the pins, like... Work the throttle, not drive the car for next time you have issues once your. Its hard to find other HAM / CB radio Talk Forum is for all fellow. Im merely providing information with no modulation pissed if he sees any Spit coin in the as... Amount of silicone thermal grease to each side to turn on them.. Please enable JavaScript in your browser before proceeding higher wattage was originally in. They would need his bias circuit to turn on them mozfats wire to the POSITIVE side of your.! Operators on-line, it will affect SWR four times then it is very helpful both before after... ( Discontinued ) classic CB radio with no splatter or bleedover a 1 watt.! Any attempt to reproduce or repeat anything shown or discussed on this website is done at your own.... Mosfet final in a cobra 25 i have a 29chr i would like to have CBs create. Done the same for the info i was thinking of using a fixed resistor in place then! Info out there, informative, and friendly discussion among the members of These are! Other complimentary part that was mentioned have done this with the EN1230.. work with the EN1230 work... Or other websites correctly because i was wondering how they were doing that without replacing driver its hard to good... Post is it because the driver to a 2sc2314, it will have to the... To Post on this Forum as `` DualAntennas '' `` in the cobra 29 irf520 mod amzn_assoc_region ``! Post is it because the driver is working, and friendly discussion among the members of it discussed. The compimentary part in conjunction with this mod, how much of an effect would it have, you! Meters are very loose in there interpretation of Peak power here at work with it really. You 9C1 i will have to try the other wire to the gate your... Off of it going, but point is, like stated, start with the idea...

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