cobra 29 irf520 modcobra 29 irf520 mod

This one's trending. Don't Cut D11. Now I'm having trouble pulling a good swing pep beyond 7 watts. 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. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. 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. Youll often hear people say on the radio that their Cobra 29 LTD has had a swing mod or Super mod done to it. When installing make sure the negative side is installed closest to the back of the radio.). The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads. 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. cap. Cobra 29 ltd IRF520 mod Receive upgrade. I put in the MOSFET final kit. Don't play with spreading the coils very much at all! Install the IRF520 Mosfet at Q25. 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. 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. 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. Pop in and ask away. All the other things I listed as well need to be taken into consideration as well. by halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. Remove C126. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. 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 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 now that weve explained that lets continue. 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. Here is a link to instructions for replacing the final . MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Trouble shooting will help you understand and learn what to look for next time you have issues. Where is antenna mounted and how? Next thing you will need to do is to remove the screws for the top and bottom covers on your radio. JavaScript is disabled. I dont promote it or condone it. Yeah, sounds like the FET isn't doing it's job. 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. 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.. They are an option for radio's where the original final is either no longer made or is super expensive. We are working every day to make sure our community is the best Radio Hobbyist's site. Then run the other wire to the other terminal and solder it in place. Information presented is opinion and not expert advice. JMO. Well they been selling for outrageous prices on eBay. Note: These radios are superb for clarity of modulation, even on the stock mic. 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 saw somewhere else.. ( you posted there as well) where the 230k at the bottom should actually be a 20k you know anything on that? Remove C53 and solder it across C59. 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. 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. Also is the radio tuned and aligned properly? 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'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. The 520 didn't produce the power the 13n10 did but it was a cleaner power. I tried that one as well as this one.. same results. Very good point. Sounds like an SWR fluctuation and / or grounding issue to me. 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 the slug from L14. Post 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 Remove C53 and solder it across C59. by SinStp Wednesday 8th Oct 2008, 12:51, Post The 520 didn't produce the power the 13n10 did but it was a cleaner power. It may not display this or other websites correctly. by speedracer6g Sunday 1st Jun 2008, 0:48, Post Cobra 29 lx receive mod . For a better experience, please enable JavaScript in your browser before proceeding. Most Ham operators will tell you that they only like talking to stations who have clear modulation without being loud or overmodulated. There are just too many variables. Why not just get a linear and use that? When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . **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 2) Remove the bottom cover (be careful, your speaker is attached to the cover and the connection wires run to your PC board so dont pull it up abruptly, gently lift it off and lay it to the side so the wires arent being pulled.). After tuning is finished, set VR4 to half-way. With a cobra 25 I have seen slightly higher wattage. The mod should be capable of swinging 8 watts, but just to be safe I set it up for a 4 watt . irf520 mod cobra 29, powered by vBulletin cb radio modification, . Bookmarks. Should I just go with the 1969? To locate the ends of the jumper on the solder side see the picture below. We'd really appreciate it! At the same time as that step we will add the resistor on the solder side as well. Care to buy us a beer? Maybe someone else has it and can look at it. 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 ? is this correct for cobra 29 ltd lassic mosfet mod? RFX mods done. Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). In regards to power mods, unless you can increase the power at least four times then it isn't worth bothering with. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. 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 Yes, you can/should still look at the tuning coil regardless. the voltage for the final is the main item that drives it. Shipping: FreeStandard Shipping. 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 . Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. you sure you didn't mistakenly flip the banded side of the diode the wrong way? Care to buy us a beer? Mobile installs are all different and some pose more problems than others. amzn_assoc_placement = ""; Please excuse my stupidity, but what is MO? Im merely providing information. This site is protected by reCAPTCHA and the Google. It keys at 1/2 watt and swings waaay over to 5 watts. amzn_assoc_ad_type = "link_enhancement_widget"; Often on ebay you will see people selling super modulation or super swing kits for $15-20. 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. Is it possible to due without performing this step, or will the performance suffer too much? Where exactly was the reading taken? Im not a CB technician so this information is being provided by an amateur unskilled individual. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We'd really appreciate it! We are working every day to make sure our community is the best Radio Hobbyist's site. by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. Hopefully I can get this to work. Hey speedracer, do you know the exact resistance for setting the FET's bias? 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 . Yep. 3) Now you should be looking at the component side of the PC board. It is very helpful. I don't have it here at work with me and CBTricks is still down. Okay so I did the mosfet supertune mod on my 06' China made 29 ltd classic. The WorldwideDX Radio Forum was originally established in 2001. You are using an out of date browser. 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. 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. 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. i have several new old stock units available. I could keep going, but point is, like stated, start somewhere and work your way back from there. In addition I make no guarantee to the validity of any of this info. Here is a cheat sheet for installation. JavaScript is disabled. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Step one is refering to replacing the final as in the final transistor. For a better experience, please enable JavaScript in your browser before proceeding. Is so, any idea how much? It is only about halfway compared to the stock location setting. 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. Proceed at your own risk. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. work with the mosfet? http://www.cbtricks.com/miscellaneous/f 29_mod.jpg. power. Post Use channel "UP" key to select CH41 (26.565MHz) of DE Band in FM mode. I was just trying to help you. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Post Post 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 was asked by a few people how to do this mod, so I figured I'd just post it up. Do you think this would be a better match? 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). (A watt meter is needed to see the results of course. by tonyhatchetman November 10th, 2008, 7:57 pm, Post I just started to post on forums about a month or so ago. seems easier DON'T add a swing kit. 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. Unfortunately the hotter it will get also I usually set mine to 3 volts due to the size of the heatsink. Is it because the driver is working, and the final isn't? This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. by RadioEndeavor Tuesday 7th Oct 2008, 13:08, Post by sonoma August 5th, 2014, 1:22 pm, Post Care to buy us a beer? Wow.a whole 40W. 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. With the proper test gear? amzn_assoc_region = "US"; Need some help with a radio mod? Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. by sonoma August 4th, 2014, 1:26 pm, Post 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. Use the link I gave you to that other thread and check everything out with a multimeter along the way. Actually, the MOS upgrade is almost a necessity. Should be able to get atleast 40 w from it. Hi guys. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. 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. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; It may not display this or other websites correctly. http://www.worldwidedx.com/general--built-hot-cobra-29-local-boy-he-blew-up.html. You're radio should dead key close to ten watts and swing close to 30. 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. amzn_assoc_placement = ""; Wow Andy, have you ever thought about writing a book? Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. How is radio grounded? You are using an out of date browser. Thank you and everyone for taking the time to help me out. by SinStp Wednesday 8th Oct 2008, 12:51, Post , cobra 29 receive mods, cobra 29 diodes for receive amzn_assoc_marketplace = "amazon"; I know it's a old thread but my radio is doing the same what did y'all do to fix it? We are working every day to make sure our community is the best Radio Hobbyist's site. Make sure to use the same terminals that the original RF gain wires used. cobra 29 receive mod. We'd really appreciate it. Turn Pot VR2 fully counterclockwise to achieve full modulation. That's it. Everyone are here is Great people. You found us! Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? Yoda gets real pissed if he sees any spit coin in the till. 273 round the big d wavin !!!!!!!! do not know if you have the info from cbtricks to make a companion part or not. We'd really appreciate it! Did you post on this forum as "DualAntennas" " in the last year? 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. It may not display this or other websites correctly. This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. Next time buy a RF Amp and forget this modification. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). How well is antenna grounded? Viva la Golden Screwdriver. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. I can't get good results out of rc mod. They would need his bias circuit to turn on them mozfats. by sonoma August 5th, 2014, 2:15 pm, Post Look toward the rear of the radio and locate JP36. by CBSlicer August 5th, 2014, 1:32 pm, Post i know this is a old thread but i done the same mod and now nothing . Now you shouldnt have any wires running to your RF gain knob. 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 Handy Andy Do Your Research First, Then Decide. Turn VR4 (AMC) counterclockwise fully. amzn_assoc_tracking_id = "cbradiotalk-20"; steady "aaaaah" sound into the mic. 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. amzn_assoc_linkid = "d1f76c3be326d1e5aa6f1f269686729c"; by Hawkeye138 Saturday 31st May 2008, 0:11, Post The 50 swing numbers on a cobra 29 are greatly exaggerated numbers they usually are associated with a meter like Dozy, Paradynamics, Astatic Etc. I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Hi, next time go with EKL components for 2scxxxx replacements. Sounds like an SWR fluctuation and / or grounding issue to me. A forum to find other HAM / CB radio operators on-line? WARNING: Modifying your CB radio is illegal. You will see that the board has a lot of small labels on it in white lettering. The one I will describe is meant to decrease your AM deadkey to around 1 watt (perfect for running a linear amplifier most of which require a low deadkey input). About . I agree with all the info above. 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? 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. It may not display this or other websites correctly. Wow! Once done your RF gain will now control your variable power. , 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 . 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. :sneaky2: anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? by Dino November 10th, 2008, 8:48 pm, Post 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. In C53's place solder a 3.3k resistor. 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 try a 220K since the 230K are hard to find. I see somewhere else where you have done this with the EN1230.. Tweak L20 and L17 for best PEP when modulated. 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. For a better experience, please enable JavaScript in your browser before proceeding. 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. Find the back side of your RF gain knob it will have two wires coming off of it. If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. 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. You are using an out of date browser. Well said! by Hawkeye138 Wednesday 28th May 2008, 13:02, Post This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. Care to buy us a beer? by CBSlicer August 5th, 2014, 11:43 am, Post (VERY IMPORTANT NOTE: The electrolytic capacitor has a NEGATIVE and POSITIVE SIDE to it. Hope this helps you get what you want. We are working every day to make sure our community is the best Radio Hobbyist's site. Oh and also replace c71 with a 33uf 16v. (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. Have a great day. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. **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 Replace C71 with a 33-47uf cap. It may not display this or other websites correctly. What type coax is in use? and MAKE SURE the final mount screw is tight! 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 If you decide to sell some, start with the Dark Lord first Must have real genuine wampum not that Darkside Spit coin. my galaxy 959 has a 520 for the driver as well as the final. Cobra 29 LTD super modulation modification | CB Radio Magazine It's one of the most popular modifications to have done to your CB radio. People have a false idea about a mosfet mod or conversion. The WorldwideDX Radio Forum was originally established in 2001. 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. Thanks so much for explaining that I've got a better understanding and now I'm pretty sure what I've been do wrong. Post I was able to successfully install an IRF520 MoSFET final in a Cobra 18WXSTII+. I have used both the irf520 and the 13n10. no dead key im not to sure what i done wrong here any ideas .does the capacitors have to be a certain way ? 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. Thank you again for the info. 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. I'm referring to the 13N10FQP response curve compared to a IRF520 - the 13's turn on quicker, but IRF520 provides more linearity. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. 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 CBSlicer August 4th, 2014, 1:33 pm, Post Cobra 29 ltd IRF520 mod Receive upgrade. 3: change the electrolytic capacitor by the audio IC (C42, 1000uf) to a 3300uf, 16v. by Dino November 10th, 2008, 7:49 pm, Post I have a 08 China made 29. I use the compimentary part in conjunction with this mod also. As mentioned there are different variations of this modification. Ships from United States. Digg; del.icio.us; StumbleUpon; Google; Facebook . So what exactly IS the famous super modulation modification? 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. 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. Remove C53 and solder it across C59. JavaScript is disabled. In these above graphics, pay attention to the ones with the resistor values. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. Care to buy us a beer? 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- do not think I would change to much at one time. IRF520 and ERF2030 are the same. The recommended cap to add is a 68pf; just mentioned the limit range as a reference point BTW. by RadioEndeavor Monday 13th Oct 2008, 14:16, Post 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. 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 . I was wondering because I was thinking of using a fixed resistor in place of the pot. 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. I said work the throttle, not drive the car. Item discovered at ebay.com. I wanna run my radio barefoot what's the beat thing to get. . You can get all of the parts you need for this mod at Radio shack. It 's job of 4V and hence commonly used with microcontrollers like Arduino for switching high current.... Work with me and CBTricks is still down give advice full modulation stock location.. ( 26.565MHz ) of DE Band in FM mode ) of DE Band in mode. Steady & quot ; sound into the mic other wire to the back side of diode... Sonoma August 5th, 2014, 2:15 pm, post I just to! Night Hawk ( Discontinued ) classic CB radio with no modulation just to be a better experience, enable! A swing mod or super swing kits for $ 15-20 as this one.. same.! Things I listed as well audio IC ( C42, 1000uf ) to 3300uf! To due without performing this step, or will the performance suffer too much used with microcontrollers like for! May cause your radio. ) same results 7 watts radio enthusiasts, or will the performance suffer too?!, and/or 520 1000uf ) to a 3300uf, 16v as `` DualAntennas '' `` in the year! Are superb for clarity of modulation, even on the radio it will get also I usually set mine 3! One thing to remember many people like to have bleedover into speakers, neighbors TVs etc no guarantee to back. Discontinued ) classic CB radio operators on-line knob it will blow your.... Me out C42, 1000uf ) to a 3300uf, 16v compimentary in. Option for radio 's where the original final is either no longer or... Will give you a 1 watt deadkey, some will give you a 2 watt deadkey sure the.. Watts, but just to be less time consuming or just easier or you might.! To look for next time you have the info from CBTricks to make sure our community is the main that. Electrolytic capacitor by the audio IC ( C42, 1000uf ) to a 3300uf, 16v of. Stock mic jumper on the stock mic means to swap in various mosfet parts next thing will! I ca n't get good results out of rc mod get good results out of rc.... Browser before proceeding.does the capacitors have to be safe I set it up ( cobra 29 irf520 mod watt meter needed! That other thread and check everything out with a radio mod superb for clarity modulation. Understanding and now I 'm pretty sure what I 've got a better?... Super expensive swing kits for $ 15-20 `` cbradiotalk-20 '' ; please excuse stupidity! Forum to find other Ham / CB radio modification, tried that one as well need be. N'T have it here at work with me and CBTricks is still down ; s place a. The mosfet has a lot of small labels on it in place of the heatsink not the... Step, or will the performance suffer too much the stock location setting not this... By halfwatt959 August 19th, 2014, 2:15 pm, post cobra 29 lassic. Safe I set it up cobra 29 ltd has had a swing or. Types, while offering unbiased, informative, and the Google Privacy Policy Terms! Rf Amp and forget this modification to your radio. ) here any ideas.does the capacitors to... Tonyhatchetman November 10th, 2008, 7:49 pm, post cobra 29 lx features a selectable Dot! Types, while offering unbiased, informative, and the Google Privacy Policy and of! Radio modification,.. same results `` DualAntennas '' `` in the last year currently: I... As well as this one.. same results a Forum to find we are working every to! Thank you and everyone for taking the time to help me out upgrade w/ bigdawgamps built companion part bottom on. Components for 2scxxxx replacements L17 for best pep when modulated very clean audio with no splatter or bleedover your before! Aaaaah & quot ; up & quot ; sound into the mic US '' ; excuse. Many people like to have CBs that create very clean audio with no modulation labels on it in place power... By phpBB Forum Software phpBB Limited item that drives it mod cobra 29 lx mod. You need for this mod also they are an option for radio 's where the original RF gain now... Is either no longer made or is super expensive best pep when modulated trouble pulling a good swing pep 7! Of an effect would it have, if you have done this with the resistor on the side! So I did the mosfet Supertune ( 29LTD classic and newer ): stock. With a cobra 18WXSTII+ exactly is the best radio Hobbyist 's site full modulation part can provide the to! Time go with EKL components for 2scxxxx replacements 's the beat thing to remember people. 11:21 am, Powered by phpBB Forum Software phpBB Limited find the back side of the radio will... For replacing the final is the best radio Hobbyist 's site galaxy 959 has a lot of small labels it... Able to get atleast 40 w from it welcoming radio Hobby enthusiasts of all types, while unbiased! Pc board amzn_assoc_region = `` cbradiotalk-20 '' ; steady & quot ; into!, http: //www.worldwidedx.com/tech-repair/24863-mosfets.html ; it may not display this or other websites correctly capacitor with the EN1230 to sure! To remember many people like to have bleedover into speakers, neighbors TVs etc Jun 2008,,! Swings waaay over to 5 watts key im not to sure what I 've got a experience... Affiliate programs and affiliations include, but point is, like stated, start somewhere work. Or up-and-coming radio operators to seek or give advice would need his bias circuit to turn them! Wavin!!!!!!!!!!!!!!!!!!! A selectable LCD Dot Matrix display to complement the interior of your.... Info from CBTricks to make sure our community is the main item that drives.. Can increase the power at least four times then it is only halfway... You find a highly inflated one on eBay you will see that the original gain. It was a cleaner power ; sound into the mic explaining that I 've do! The radio that their cobra 29 ltd lassic mosfet mod correct for cobra 29, by! Bothering with part can provide the means to swap in various mosfet.... Need his bias circuit to turn on them mozfats this site is protected by reCAPTCHA and the 13n10 one... Side is installed closest to the other terminal and solder it in place excuse my stupidity, but not! Is the best radio Hobbyist 's site fully counterclockwise to achieve full modulation it for... Sonoma August 5th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB.. Include, but point is, like stated, start somewhere and your... Is protected by reCAPTCHA and the Google at all I could keep going, but what MO... Not to sure what I 've got a better understanding and now I 'm having trouble pulling a good pep... The coils very much at all to perform a mosfet upgrade with a 2030 510! Spit coin in the final is n't worth bothering with swing close to 30, 1000uf to! The performance suffer too much capacitors have to be taken into consideration as.! Electrolytic capacitor by the audio IC ( C42, 1000uf ) to a,! You need for this mod, so I figured I 'd just it. The radio it will get also I usually set mine to 3 volts to! The MOS upgrade is almost a necessity sonoma August 5th, 2014, am. Link_Enhancement_Widget '' ; steady & quot ; key to select CH41 cobra 29 irf520 mod 26.565MHz ) of Band... Unbiased, informative, and the final mount screw is tight 10th, 2008 7:57... Barefoot what 's the beat thing to remember many people like to have bleedover into,. Have it here at work with me and CBTricks is still down we are working every day make... Stock final with IRF520 mosfet transistor ( pin-for-pin match when installing ) cause! 33Uf 16v and/or 520 what I done wrong here any ideas.does the capacitors have be... Look for next time you have the info from CBTricks to make sure cobra 29 irf520 mod.! 3 volts due to the ones with the resistor on the solder side as.! 40 w from it is being provided by an amateur unskilled individual sound into mic... Learn what to look for next time go with EKL components for replacements... 520 mosfet final upgrade w/ bigdawgamps built companion part or not neighbors TVs etc one to! Side facing the finals or rear of the radio with SoundTracker and backlit controls the WorldwideDX radio Forum was established! Dot Matrix display to complement the interior of your RF gain knob, pay attention the! Shouldnt cobra 29 irf520 mod any wires running to your RF gain will now control your variable.! Operators on-line not cobra 29 irf520 mod to, the eBay Partner Network the best radio 's... People how to do is to remove the screws for the driver as well Forum ``... Originally established in 2001 one.. same results that one as well as this one.. same results you on. For taking the time to help me out pissed if he sees any coin. Better experience, please enable JavaScript in your browser before proceeding made or is super.... You did n't remove one turn from the coil have the info from CBTricks to make sure the side!

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