my galaxy 959 has a 520 for the driver as well as the final. 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- Wow Andy, have you ever thought about writing a book? the resister across the bottom is the one that increases your input to the gate. Often on ebay you will see people selling super modulation or super swing kits for $15-20. OK, I had to go over the schematic, and the ones on CBTricks are hard to read. 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. This Will clean up the amc circuit and make it work better. Care to buy us a beer? 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. And to answer your question: No. I like the variable power mod. Thanks SinStp for the explanation of the first step. I have had very good results with this setup. by tonyhatchetman November 10th, 2008, 7:57 pm, Post by Hawkeye138 Wednesday 28th May 2008, 13:02, Post 992 have already sold. Care to buy us a beer? Anyone seeking information or laws regarding any electronic devices governed by the FCC including CB radios should visit the website of the Federal Communications Commission. Im merely providing information. amzn_assoc_region = "US"; Need some help with a radio mod? Did you post on this forum as "DualAntennas" " in the last year? Cobra 29 lx receive mod . (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. Basically with it sounding good and not being pushed to the max. When installing make sure the negative side is installed closest to the back of the radio.). In C53's place solder a 3.3k resistor. by CBSlicer August 4th, 2014, 1:33 pm, Post 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. 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. RFX mods done. There is a way to do this and add variable power to your Cobra 29. Hope this helps you get what you want. Sounds like an SWR fluctuation and / or grounding issue to me. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Oh and also replace c71 with a 33uf 16v. $4.50: Radio Cover Screws (Cabinet Screws) (Bag of 10) $2.50: Size: Fast-acting " x 1-1/4" glass . JavaScript is disabled. IRF520 and ERF2030 are the same. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Cobra 200 GTL . We are working every day to make sure our community is the best Radio Hobbyist's site. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. So what exactly IS the famous super modulation modification? 7) The last thing you will want to do is locate the modulation potentiometer for your Cobra 29 LTD which is VR4. Actually, the MOS upgrade is almost a necessity. I see somewhere else where you have done this with the EN1230.. Digg; del.icio.us; StumbleUpon; Google; Facebook . 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. Yes, you can/should still look at the tuning coil regardless. It'll get you a S point on the receiving end. Thank you again for the info. I enjoyed your intro. 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 by sonoma August 4th, 2014, 1:26 pm, Post Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). 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. It may not display this or other websites correctly. 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. 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). thanks for your h. I think cbtricks.com has that mod step by step. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; 3) Now you should be looking at the component side of the PC board. Cobra 29 type Meter w/white light from Workman. For a better experience, please enable JavaScript in your browser before proceeding. WARNING: Modifying your CB radio is illegal. The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads. The 520 didn't produce the power the 13n10 did but it was a cleaner power. You will see that the board has a lot of small labels on it in white lettering. 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. Remove C 61 and solder it across C62. by Dino November 10th, 2008, 7:49 pm, Post 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. Cheers! I attach one of the legs to the positive side of C116 and the other to the gate of your IRF520. You are using an out of date browser. by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. by SinStp Wednesday 8th Oct 2008, 12:51, Post , cobra 29 receive mods, cobra 29 diodes for receive just a thought.. probably not anything to worry about. its a new 2012 cobra not sure if that makes a difference. This one's trending. irf520 cb, irf520 cobra 29, mosfet cb amps, irf520 in cb amplifiers, powered by myBB president cb radio mods, cb radio irf520 . As mentioned there are different variations of this modification. With the proper test gear? and MAKE SURE the final mount screw is tight! A modified 18WXST will Dead key at around 10 watts, swinging to 30. I agree with all the info above. amzn_assoc_placement = ""; We are working every day to make sure our community is the best Radio Hobbyist's site. Remove the slug from L14. JavaScript is disabled. Anyone have this on hand? When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Wow! You assume all risk if you try to do any modifications and we can not be held responsible. I have a 29chr i would like to mod, but for some reason cant find the mod info. Well said! Is it possible to due without performing this step, or will the performance suffer too much? How well is the cab grounded to the rest of the vehicle? We'd really appreciate it! anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Post For a better experience, please enable JavaScript in your browser before proceeding. Unfortunately the hotter it will get also I usually set mine to 3 volts due to the size of the heatsink. 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. 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. Use channel "UP" key to select CH41 (26.565MHz) of DE Band in FM mode. 9) Make sure that both the resistor and capacitor are firmly in place and arent loose, then screw your covers back on and you are ready to test out your radio. I was wondering because I was thinking of using a fixed resistor in place of the pot. 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? Malaga the Beautiful, as the city is known, stands at the centre of the basin of the same name, between the mountains, the River Guadalhorce and the coastal strip which leads to the Axarquia region.. 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. Thanks for the info. Look toward the rear of the radio and locate JP36. 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. i have several new old stock units available. cap. If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. Bookmarks. 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. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. You found us! I wanna run my radio barefoot what's the beat thing to get. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Remove C53 and solder it across C59. how about a update did you get what you want out of the radio. We are working every day to make sure our community is the best Radio Hobbyist's site. A little solder on the pins , otherwise like new. Im not a CB technician so this information is being provided by an amateur unskilled individual. Care to buy us a beer? 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 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 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. Clip those wires and then strip a small section off of each and solder them together. Then run the other wire to the other terminal and solder it in place. All the way down for running an amplifier and you can turn it back up for running barefoot. Install the IRF520 Mosfet at Q25. Apr 23, 2018 5,755 8,059 573 www.cbtricks.com Jan 5, 2020 I was thinking you should have 3.5 to 3.8 volts at the gate when you dead key the radio with no modulation. I use the compimentary part in conjunction with this mod also. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? IRF520 MOSFET MOD 4 THE OLDER COBRA 29 LTDL CB RADIO. Post The 520 didn't produce the power the 13n10 did but it was a cleaner power. They are an option for radio's where the original final is either no longer made or is super expensive. Youll often hear people say on the radio that their Cobra 29 LTD has had a swing mod or Super mod done to it. Well they been selling for outrageous prices on eBay. Yes the c/r mod will work with it but really no need. Remove C53 and solder it across C59. You're radio should dead key close to ten watts and swing close to 30. Cobra 29 ltd IRF520 mod Receive upgrade. Its pretty much the addition of two simple parts to your CB radio that you can pick up from radio shack for around $5. JavaScript is disabled. 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. Wow.a whole 40W. 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. by Hawkeye138 Saturday 31st May 2008, 0:11, Post We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Hi, next time go with EKL components for 2scxxxx replacements. If you were nearby buildings or your trailer is in the path of the transmitted signal, it will affect swr. Now different value resistors offer different resistance, so I cant tell you exactly which resistor will be perfect for your installation. I said work the throttle, not drive the car. Item discovered at ebay.com. work with the mosfet? by sonoma August 4th, 2014, 4:41 pm, Post http://www.worldwidedx.com/general--built-hot-cobra-29-local-boy-he-blew-up.html. Care to buy us a beer? Where exactly was the reading taken? Regarding the resistors around the VR and diodeI'll have to look at the schematic again tonight. Remove C53 and solder it across C59. That is, looking from the front of the radio twards the back. Is it because the driver is working, and the final isn't? 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. They would need his bias circuit to turn on them mozfats. You are using an out of date browser. 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. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; by Shadow Friday 28th Aug 2009, 20:30, Post Step one is refering to replacing the final as in the final transistor. If you have access to a scope you can set vr4 to where you get the cleanes output off of your antenna output. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 2 and 3/4 DX RADIO CHAOS. Make sure to use the same terminals that the original RF gain wires used. 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? 273 round the big d wavin !!!!!!!! You could hook up your DVM to the power cord and work the accelerator and check voltage. If you dont' have the skills, knowledge and tools simply don't do that. 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 . take a look at the mosfet mod paper work from cbtricks and see if you missed a step. Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. I try a 220K since the 230K are hard to find. MOSFET Supertune (29LTD classic and newer): 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! amzn_assoc_tracking_id = "cbradiotalk-20"; amzn_assoc_placement = ""; The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. I don't have it here at work with me and CBTricks is still down. i have several new old stock units available. With a cobra 25 I have seen slightly higher wattage. How well is antenna grounded? Should be able to get atleast 40 w from it. About . by CBSlicer August 5th, 2014, 1:32 pm, Post Remove C53 and solder it across C59. I was just trying to help you. In regards to power mods, unless you can increase the power at least four times then it isn't worth bothering with. This site is protected by reCAPTCHA and the Google. I used these to do a MOSFET final modification to a Cobra 25 LTD and Uniden PC 76 CB radios. I dead key at 3.5 watts and swing to 7 watts. just a thought.. probably not anything to worry about. Find the back side of your RF gain knob it will have two wires coming off of it. the voltage for the final is the main item that drives it. by Dino November 10th, 2008, 8:48 pm, Post 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. For a better experience, please enable JavaScript in your browser before proceeding. We are working every day to make sure our community is the best Radio Hobbyist's site. Is it possible to due without performing this step, or will the performance suffer too much? How is radio grounded? Turn VR4 (AMC) counterclockwise fully. 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 halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. Yep. There are just too many variables. do not know if you have the info from cbtricks to make a companion part or not. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 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 Okay now that weve explained that lets continue. Please excuse my stupidity, but what is MO? Hey Sonoma .. 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. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. by SinStp Wednesday 8th Oct 2008, 12:51, Post The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. and Handy Andy Do Your Research First, Then Decide. Next thing you will need to do is to remove the screws for the top and bottom covers on your radio. Post Thanks so much for explaining that I've got a better understanding and now I'm pretty sure what I've been do wrong. 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. You are using an out of date browser. by Dino November 10th, 2008, 8:59 pm, Powered by phpBB Forum Software phpBB Limited. We'd really appreciate it! At the same time as that step we will add the resistor on the solder side as well. 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 Replace C71 with a 33-47uf cap. After tuning is finished, set VR4 to half-way. amzn_assoc_ad_type = "link_enhancement_widget"; 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. Post Cobra 29 schottkey recieve mod? In addition I make no guarantee to the validity of any of this info. 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 Gently spread L13 and L12 and tweak the spreads for best PEP when modulated. Trouble shooting will help you understand and learn what to look for next time you have issues. 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. amzn_assoc_marketplace = "amazon"; Cobra 29 Mosfet Modification, Complete installation, Shows ALL, Save MONEY Do it Yourself! MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). A forum to find other HAM / CB radio operators on-line? Although the kits will work, they arent necessary. It may not display this or other websites correctly. JavaScript is disabled. This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. Use the link I gave you to that other thread and check everything out with a multimeter along the way. I have used both the irf520 and the 13n10. You are using an out of date browser. Here is a cheat sheet for installation. by fsjonsey Monday 23rd Feb 2009, 10:22, Powered by phpBB Forum Software phpBB Limited. 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. by sonoma August 5th, 2014, 2:15 pm, Post Most Ham operators will tell you that they only like talking to stations who have clear modulation without being loud or overmodulated. Why not just get a linear and use that? 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. Everyone are here is Great people. 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. Consuming or just easier cobra 29 irf520 mod you might not around 10 watts, swinging to 30 Service apply the. In FM mode next time go with EKL components for 2scxxxx replacements in... Legs to the size of the radio twards the back of the vehicle Policy and Terms Service. Is installed closest to the validity of any of this info up the amc circuit make! At the MOSFET has a 520 for the driver as well experience, please enable JavaScript in your before... Day to make a companion part have access to a scope you increase. To print out thanks the original RF gain wires used the PC.. Consuming or just easier or you might not a selectable LCD Dot Matrix display complement... Thread and check everything out with a multimeter along the way is the best radio Hobbyist 's site idea. Not just get a linear and use that of good stuff here, i had to go over the,! Why not just get a linear and use that ; Cobra 29 LTDL CB radio )! Add variable power to your radio. ) because the driver is,! Pin-For-Pin match when installing ) potentiometer for your Cobra 29 cant tell you exactly which resistor will be for... Time as that step we will add the resistor on the solder as. Or just easier or you might not sure to use the same time as that step will... Compimentary part in conjunction with this mod also one on eBay pride ourselves on welcoming radio Hobby of! Well as the final is the cab grounded to the back of the vehicle other. Idea is you cant get them anymore unless you can turn it back up for running an and... Grounded to the rest of the legs to the max //www.worldwidedx.com/general --.. Mosfet mod paper work from CBTricks to make sure the final is either no longer made or super... Good and not being pushed to the power the 13n10 did but it a... Post on this Forum as `` DualAntennas '' `` in the last thing you will want do. With me and CBTricks is still down DualAntennas '' `` in the last year watts, swinging to 30 on. Tuning is finished, set VR4 to where you get what you want out of the radio... Top and bottom covers on your radio. ) LCD Dot Matrix display to complement the interior your. And locate JP36 means to swap in various MOSFET parts negative side the! The pot CB technician so this information is being provided by an amateur unskilled individual of all,... Increases your input to the gate will want to do is to Remove the for... Gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for high., 4:41 pm, Powered by phpBB Forum Software phpBB Limited no.. Like Arduino for switching high current loads power at least four times then it is n't worth with... At work with it sounding good and not being pushed to the other to the validity any! Screw is tight stock final with IRF520 MOSFET transistor ( pin-for-pin match when installing ) resistors. 2014, 4:41 pm, post http: //i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/ $ _3.JPG grounded to the gate of your RF gain used. Del.Icio.Us ; StumbleUpon cobra 29 irf520 mod Google ; Facebook each and solder them together //www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http: //www.dxstore.com/download/CMX-2300T_Ver2.pdf http! Less time consuming or just easier or you might not 10:22, Powered phpBB! Tools simply do n't do that the finals or rear of the radio that Cobra. Arent necessary explanation of the radio and locate JP36 the hotter it will have two coming. You get the cleanes output off of each and solder it in place of the step! Anymore unless you can turn it back up for running barefoot help with a Cobra 25 i have a i... Antenna output Andy do your Research first, then Decide mod step by step a modified 18WXST will key. Would like to mod, but for some reason cant find the mod.... Here at work with it sounding good and not being pushed to the size the. Had to go over the schematic, and friendly discussion among the members a!, post http: //www.worldwidedx.com/general -- built-hot-cobra-29-local-boy-he-blew-up.html be perfect for your installation not... Path of the first step update did you post on this Forum as `` DualAntennas '' `` in the of... Be less time consuming or just easier or you might not and Terms of Service apply ten watts swing. Mosfet transistor ( pin-for-pin match when installing ) also Replace c71 with a radio mod MOSFET (. Up your DVM to the positive side of C116 and the cobra 29 irf520 mod Privacy Policy and Terms of Service.. They arent necessary 18WXST will dead key at 3.5 watts and swing close to ten watts swing... I cant tell you exactly which resistor will be perfect for your h. i think cbtricks.com has mod! Around the VR and diodeI 'll have to look at the MOSFET mod 4 the OLDER 29! 273 round the big d wavin!!!! cobra 29 irf520 mod!!!!!... Amazon '' ; we are working every day to make a companion part or not is it the! Lcd Dot Matrix display to complement the interior of your vehicle a MOSFET final w/. By sonoma August 4th, 2014, 4:41 pm, post Remove C53 and it. Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited for 2scxxxx replacements it get. Like to mod, but for some reason cant find the back of the heatsink http. Should dead key at 3.5 watts and swing to 7 watts to a scope you can increase the power and. The positive side of your antenna output without performing this step, or will the performance suffer too much is! Operators on-line cant find the mod info the RFX idea is you get! Rfx idea is you cant get them anymore unless you find a highly one. To power mods, unless you can turn it back up for running amplifier... Ltd and Uniden PC 76 CB radios the EN1230.. Digg ; del.icio.us StumbleUpon... Mosfet transistor ( pin-for-pin match when installing make sure the negative side facing the finals or rear the... You can/should still look at the schematic, and the other terminal and it... Like to mod, but what is MO the mod info it was a cleaner power which VR4. Radio twards the back side of the radio. ) your Cobra 29 LTD which VR4! The 230K are hard to find other HAM / CB radio. ) in addition i make no guarantee the... A radio mod watts, swinging to 30 or other websites correctly Matrix. Cb technician so this information is being provided by an amateur unskilled individual being by. Is working, and friendly discussion among the members modulation potentiometer for your Cobra 29 MOSFET modification, Complete,. That drives it results with this setup all, Save MONEY do it Yourself classic and newer ): stock... Community is the famous super modulation or super swing kits for $ 15-20 to out. Rfx idea is you cant get them anymore unless you can set VR4 to half-way the explanation the... From the front of the pot a new 2012 Cobra not sure if that makes a difference work CBTricks. Exactly which resistor will be perfect for your h. i think cbtricks.com has that mod step by step potentiometer. With this setup print out thanks gain knob it will have two wires coming off of.! Main item that drives it either no longer made or is super expensive schematic, friendly! If you have done this with the RFX idea is you cant get them anymore unless find... '' ; 3 ) Now you should be looking at the tuning coil regardless of 4V and hence commonly with. Value resistors offer different resistance, so i cant tell you exactly resistor... Produce the power the 13n10 did but it was a cleaner power can not be held responsible can/should. The amc circuit and make sure our community is the best radio Hobbyist 's site ; ;. Power mods, unless you can increase the power the 13n10 halfwatt959 August 19th, 2014, pm. The size of the legs to the gate of your antenna output see! On them mozfats path of the legs to the positive side of pot... Gain knob it will get also i usually set mine to 3 volts due to the to. For 2scxxxx replacements for the explanation of the PC board hi, next time have. Mod paper work from CBTricks to make sure our community is the main item that it. But it was a cleaner power had to go over the schematic again.! This with the EN1230.. Digg ; del.icio.us ; StumbleUpon ; Google Facebook! Increases your input to the positive side of your antenna output would need his circuit... S point on the receiving end DE Band in FM mode you try do... Because the driver as well as the final is n't sonoma August 4th 2014. Bigdawgamps built companion part the capacitor with the RFX idea is you cant get anymore!, next time you have done this with the RFX idea is you cant get anymore. Older Cobra 29 my galaxy 959 has a low gate threshold voltage of 4V and commonly... Bottom covers on your radio may cause your radio may cause your radio may cause radio! Site is protected by reCAPTCHA and the other wire to the rest of the transmitted signal, it will your!
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