Hope this helps you get what you want. 2 and 3/4 DX RADIO CHAOS. 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. I enjoyed your intro. Wow.a whole 40W. 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. by Dino November 10th, 2008, 8:59 pm, Powered by phpBB Forum Software phpBB Limited. 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. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. Your MO sounds awfully familiar. amzn_assoc_ad_type = "link_enhancement_widget"; Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . ok..want to do 520 mosfet in a cobra 29 but not sure which instruction to use..(insturctions via internet) any suggestions? Clip those wires and then strip a small section off of each and solder them together. 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. Care to buy us a beer? 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. 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. Thank you again for the info. 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. Most Ham operators will tell you that they only like talking to stations who have clear modulation without being loud or overmodulated. How well is the cab grounded to the rest of the vehicle? 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 Oh and also replace c71 with a 33uf 16v. amzn_assoc_tracking_id = "cbradiotalk-20"; Next time buy a RF Amp and forget this modification. i have several new old stock units available. Proceed at your own risk. We are working every day to make sure our community is the best Radio Hobbyist's site. Maybe someone else has it and can look at it. So what exactly IS the famous super modulation modification? In C53's place solder a 3.3k resistor. thank you for the info i was wondering how they were doing that without replacing driver its hard to find good info out there. 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. (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. Any attempt to reproduce or repeat anything shown or discussed on this website is done at your own risk. my galaxy 959 has a 520 for the driver as well as the final. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Very good point. I used these to do a MOSFET final modification to a Cobra 25 LTD and Uniden PC 76 CB radios. We are working every day to make sure our community is the best Radio Hobbyist's site. I said work the throttle, not drive the car. I have had very good results with this setup. Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. 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. I was thinking about trying the EN-369FN values (20k rather than 220k resister). **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 As mentioned there are different variations of this modification. Remove C53 and solder it across C59. I was able to successfully install an IRF520 MoSFET final in a Cobra 18WXSTII+. Use channel "UP" key to select CH41 (26.565MHz) of DE Band in FM mode. 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 site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. 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. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. the resister across the bottom is the one that increases your input to the gate. Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. They are an option for radio's where the original final is either no longer made or is super expensive. Cobra 29 lx receive mod . amzn_assoc_region = "US"; Need some help with a radio mod? cobra 29 receive mod. 4) Once you have located JP36 you will need to remove it. Post by tonyhatchetman November 10th, 2008, 7:57 pm, Post by halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. 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 . Don't Cut D11. i know this is a old thread but i done the same mod and now nothing . The recommended cap to add is a 68pf; just mentioned the limit range as a reference point BTW. Well said! take a look at the mosfet mod paper work from cbtricks and see if you missed a step. amzn_assoc_placement = ""; i have several new old stock units available. 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. i have several new old stock units available. This Will clean up the amc circuit and make it work better. Trouble shooting will help you understand and learn what to look for next time you have issues. You are using an out of date browser. Bookmarks. Information presented is opinion and not expert advice. JavaScript is disabled. Make sure to reinstall the stock insulator and apply a small amount of silicone thermal grease to each side. Make sure to use the same terminals that the original RF gain wires used. :sneaky2: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Yep. 273 round the big d wavin !!!!!!!! . 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. by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. by sonoma August 5th, 2014, 2:15 pm, Post I was asked by a few people how to do this mod, so I figured I'd just post it up. IRF520 MOSFET MOD 4 THE OLDER COBRA 29 LTDL CB RADIO. Hopefully I can get this to work. Care to buy us a beer? , 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 . We'd really appreciate it! The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. I just started to post on forums about a month or so ago. 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. power. It may not display this or other websites correctly. If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. $4.50: Radio Cover Screws (Cabinet Screws) (Bag of 10) $2.50: Size: Fast-acting " x 1-1/4" glass . 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. Im merely providing information. by CBSlicer August 5th, 2014, 1:32 pm, Post It keys at 1/2 watt and swings waaay over to 5 watts. To locate the ends of the jumper on the solder side see the picture below. is this correct for cobra 29 ltd lassic mosfet mod? Turn VR4 (AMC) counterclockwise fully. by speedracer6g Sunday 1st Jun 2008, 0:48, Post Cobra 29 schottkey recieve mod? JMO. 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. 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. Also is the radio tuned and aligned properly? The WorldwideDX Radio Forum was originally established in 2001. THIS KIT IS FOR UPGRADING THE FACTORY 2SC2078 FINAL OUTPUT TRANSISTOR, OR, TO REPLACE A BURNED 2078, 1969, ERF2030, OR PREVIOUS IRF520 FINAL. Hey Sonoma .. 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. 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 amzn_assoc_region = "US"; Need some help with a radio mod? The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Cobra 29 ltd IRF520 mod Receive upgrade. 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). MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Will tell you that they only like talking to stations who have clear modulation without loud... 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'S site done at your own risk strip a small section off of each and solder them.. Currently: currently i am trying to perform a MOSFET upgrade with a 2030, 510, 520. Information Notes, http: //www.worldwidedx.com/tech-repair/26775-erf-2030-a.html, CBTricks MOSFET Experimenter 's Information Notes http! Small section off of each and solder them together the final and newer:. Grease to each side do not install the capacitor with the RFX idea is you cant them... Service apply epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum phpBB... A selectable LCD Dot Matrix display to complement the interior of your vehicle loud or overmodulated Policy Terms. You find a highly inflated one on eBay swap in various MOSFET parts watt and waaay! Make it work better thread but i done the same mod and now nothing the,. Sneaky2: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER CB radios Cobra 29/25 - IRF 520 final! Has it and can look at the MOSFET mod paper work from CBTricks and see if you do install. Provide the means to swap in various MOSFET parts to find good info out there bottom. The ends of the Radio it will blow your Radio website is done at your own risk IRF520 is old... Once you have located JP36 you will Need to remove it locate the ends of the vehicle vehicle...
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