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 Oh and also replace c71 with a 33uf 16v. 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. Proceed at your own risk. (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. 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. 1) Flip your radio upside down so the speaker is facing up. Well said! by Dino November 10th, 2008, 7:49 pm, Post Remove C53 and solder it across C59. You butcher a radio to that extent, probably getting it wrong in the alignment process just to get the same power output you can do for spending $10 on a 40W linear from Ebay? 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. They are an option for radio's where the original final is either no longer made or is super expensive. Bookmarks. but when I check the voltage and it is low I change the resister to get it closer to 3.5 to 3.8 volts. 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). Is it because the driver is working, and the final isn't? When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Don't play with spreading the coils very much at all! Okay now that weve explained that lets continue. The WorldwideDX Radio Forum was originally established in 2001. I can't get good results out of rc mod. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. Cobra 29 ltd classic power mods . Look toward the rear of the radio and locate JP36. 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. 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. 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. and Handy Andy Do Your Research First, Then Decide. $4.50: Radio Cover Screws (Cabinet Screws) (Bag of 10) $2.50: Size: Fast-acting " x 1-1/4" glass . Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. Item discovered at ebay.com. It is very helpful. Cheers! Care to buy us a beer? Have a great day. 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. 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 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. don't know if it would be the same for the cobra or not. 992 have already sold. by Hawkeye138 Wednesday 28th May 2008, 13:02, Post Also is the radio tuned and aligned properly? You are using an out of date browser. The first thing to know about this modification is that you dont need a special kit to do it. I have a 29chr i would like to mod, but for some reason cant find the mod info. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads. by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. As mentioned there are different variations of this modification. Now you shouldnt have any wires running to your RF gain knob. 6) Now you will need to solder the cap into place on the solder side of the PC board. Thank you and everyone for taking the time to help me out. 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. Im merely providing information. cap. the resister across the bottom is the one that increases your input to the gate. It may not display this or other websites correctly. About . Remember, I didn't come up with this mod, I just documented it here. We'd really appreciate it! 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. Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to. the voltage for the final is the main item that drives it. 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. 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 . Your MO sounds awfully familiar. After tuning is finished, set VR4 to half-way. A modified 18WXST will Dead key at around 10 watts, swinging to 30. Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. by RedEye Friday 30th May 2008, 14:40, Post MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). JavaScript is disabled. 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. Do not do this modification if you are someone who wants clean, clear modulation. It may not display this or other websites correctly. is this correct for cobra 29 ltd lassic mosfet mod? http://www.cbtricks.com/miscellaneous/f 29_mod.jpg. We are working every day to make sure our community is the best Radio Hobbyist's site. They would need his bias circuit to turn on them mozfats. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. 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 A little solder on the pins , otherwise like new. cobra 29 receive mod. by sonoma August 5th, 2014, 1:22 pm, Post If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. The WorldwideDX Radio Forum was originally established in 2001. Thank you again for the info. It is only about halfway compared to the stock location setting. Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . by CBSlicer August 4th, 2014, 1:33 pm, Post hatchet told you that !!!!! JavaScript is disabled. 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. RFX mods done. Find the back side of your RF gain knob it will have two wires coming off of it. Post Where exactly was the reading taken? 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? We are working every day to make sure our community is the best Radio Hobbyist's site. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). This is the far left leg looking at the front of the mosfet. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Remove the slug from L14. I do use the 13n10 99% of the time when I mod my 29's and just role the mike gain back to help clean up the modulation. I also replace C62 with a 390 to 480pf cap. steady "aaaaah" sound into the mic. I know it's a old thread but my radio is doing the same what did y'all do to fix it? how about a update did you get what you want out of the radio. Here is a cheat sheet for installation. I was wondering because I was thinking of using a fixed resistor in place of the pot. Trouble shooting will help you understand and learn what to look for next time you have issues. The reality is that even numbers like 25 watts of peak power would not be an accurate representation of the real power. Hi, next time go with EKL components for 2scxxxx replacements. 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. Ships from United States. by Hawkeye138 Saturday 31st May 2008, 0:11, Post When installing make sure the negative side is installed closest to the back of the radio.). I dont promote it or condone it. 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. If you have access to a scope you can set vr4 to where you get the cleanes output off of your antenna output. I like the variable power mod. by CBSlicer August 5th, 2014, 1:32 pm, Post Should I just go with the 1969? JavaScript is disabled. Why not just get a linear and use that? How well is antenna grounded? Cobra 29 lx receive mod . 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. I dead key at 3.5 watts and swing to 7 watts. BACKGROUND INFO: I had already done a variable power/swing mod with 470uf cap, a transistor, a pot and 100 ohm resistor to ground from the pot. For a better experience, please enable JavaScript in your browser before proceeding. 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. 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. 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. Regarding the resistors around the VR and diodeI'll have to look at the schematic again tonight. Actually, the MOS upgrade is almost a necessity. Care to buy us a beer? The EN2030. I was thinking about trying the EN-369FN values (20k rather than 220k resister). Yes the c/r mod will work with it but really no need. by RadioEndeavor Tuesday 7th Oct 2008, 13:08, Post The 520 didn't produce the power the 13n10 did but it was a cleaner power. by RadioEndeavor Monday 13th Oct 2008, 14:16, Post The WorldwideDX Radio Forum was originally established in 2001. A forum to find other HAM / CB radio operators on-line? i have several new old stock units available. THIS KIT IS FOR UPGRADING THE FACTORY 2SC2078 FINAL OUTPUT TRANSISTOR, OR, TO REPLACE A BURNED 2078, 1969, ERF2030, OR PREVIOUS IRF520 FINAL. amzn_assoc_tracking_id = "cbradiotalk-20"; Care to buy us a beer? amzn_assoc_marketplace = "amazon"; http://www.worldwidedx.com/general--built-hot-cobra-29-local-boy-he-blew-up.html. I'm referring to the 13N10FQP response curve compared to a IRF520 - the 13's turn on quicker, but IRF520 provides more linearity. This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. **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 Thanks for the info. 7) The last thing you will want to do is locate the modulation potentiometer for your Cobra 29 LTD which is VR4. 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. I've had real good success with the IRF520N mosfet mods, and I make my own biasing circuit, so I'll look into this and see how this will work. i have several new old stock units available. no dead key im not to sure what i done wrong here any ideas .does the capacitors have to be a certain way ? This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). 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. Pop in and ask away. FIRST INSTALL: ERF2030 I followed all the instructions on CBTRICKS and I was getting 0 power out and 0 swing. To locate the ends of the jumper on the solder side see the picture below. People have a false idea about a mosfet mod or conversion. ALL KITS COME WITH COMPLETE INSTALLATION INSTRUCTIONS $15.00 EACH SELECT RADIO MODEL IRF-520 MOSFET FINAL TRANSISTOR REPLACEMENT FOR 858 PLL UNITS ONLY Pop in and ask away. 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. 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. 29 LX features a selectable LCD Dot Matrix display to complement the interior of your vehicle. Any attempt to reproduce or repeat anything shown or discussed on this website is done at your own risk. **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 irf520 mosfet for cobra 29. Cobra 29 ltd IRF520 mod Receive upgrade. 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). amzn_assoc_tracking_id = "cbradiotalk-20"; You will see that the board has a lot of small labels on it in white lettering. The recommended cap to add is a 68pf; just mentioned the limit range as a reference point BTW. Welcome to the forum. For a better experience, please enable JavaScript in your browser before proceeding. At the same time as that step we will add the resistor on the solder side as well. What type coax is in use? Doing it that way really lets you fine tune it. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. I attach one of the legs to the positive side of C116 and the other to the gate of your IRF520. amzn_assoc_region = "US"; Need some help with a radio mod? by sonoma August 4th, 2014, 4:41 pm, Post 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. If you dont' have the skills, knowledge and tools simply don't do that. Sounds like an SWR fluctuation and / or grounding issue to me. work with the mosfet? anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. amzn_assoc_marketplace = "amazon"; Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. 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. 273 round the big d wavin !!!!!!!! 3) Now you should be looking at the component side of the PC board. Did you post on this forum as "DualAntennas" " in the last year? anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? 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 C126. power. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. 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.. by SinStp Wednesday 8th Oct 2008, 12:51, Post Basically with it sounding good and not being pushed to the max. 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. Should be able to get atleast 40 w from it. 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 Dino November 10th, 2008, 8:59 pm, Powered by phpBB Forum Software phpBB Limited. 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. We'd really appreciate it! There are just too many variables. Everyone are here is Great people. by sonoma August 5th, 2014, 2:15 pm, Post I also suggest that you have a watt meter so you can test your output before and after and also so you can make adjustments if necessary. 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 + $4.25 shipping do not think I would change to much at one time. I was thinking you should have 3.5 to 3.8 volts at the gate when you dead key the radio with no modulation. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. You found us! Hope this helps you get what you want. How about the cap and resistor mod? Tweak L20 and L17 for best PEP when modulated. It'll get you a S point on the receiving end. This Will clean up the amc circuit and make it work better. (A watt meter is needed to see the results of course. Hey speedracer, do you know the exact resistance for setting the FET's bias? 9) Make sure that both the resistor and capacitor are firmly in place and arent loose, then screw your covers back on and you are ready to test out your radio. What I meant I guess is the max it will handle or be able to put out without any obvious stress being placed on it or pushing it extremely hard and without any sort of audio distortion. You can get all of the parts you need for this mod at Radio shack. Shipping: FreeStandard Shipping. We are working every day to make sure our community is the best Radio Hobbyist's site. So if you've a 10W rig, unless you can increase the power to 40W its not worth bothering with. Although the kits will work, they arent necessary. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). http://www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http://cbradiomagazine.com/March 2007/Cobra 29 LTD Super Modulation Modification.htm, http://www.dxstore.com/download/CMX-2300T_Ver2.pdf, http://i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/$_3.JPG. I could keep going, but point is, like stated, start somewhere and work your way back from there. What kind of power can be expected from this mod? anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Cobra 29LTD ST Night Hawk (Discontinued) Classic CB Radio with SoundTracker and backlit controls. just a thought.. probably not anything to worry about. by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. by Dino November 10th, 2008, 8:48 pm, Post That's it. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. All the other things I listed as well need to be taken into consideration as well. Digg; del.icio.us; StumbleUpon; Google; Facebook . This one's trending. Do you think this would be a better match? 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. Remove R55 amd solder a 22pf cap in its place. by tonyhatchetman November 10th, 2008, 7:57 pm, Post IRF520 MOSFET MOD 4 THE OLDER COBRA 29 LTDL CB RADIO. We are working every day to make sure our community is the best Radio Hobbyist's site. Now I'm having trouble pulling a good swing pep beyond 7 watts. See details Next time buy a RF Amp and forget this modification. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Sounds like an SWR fluctuation and / or grounding issue to me. its a new 2012 cobra not sure if that makes a difference. this will help you see what parts to use. We'd really appreciate it! 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. I have used both the irf520 and the 13n10. by Shadow Friday 28th Aug 2009, 20:30, Post It keys at 1/2 watt and swings waaay over to 5 watts. by halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited. my galaxy 959 has a 520 for the driver as well as the final. 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. The 50 swing numbers on a cobra 29 are greatly exaggerated numbers they usually are associated with a meter like Dozy, Paradynamics, Astatic Etc. Hi guys. Remove C 61 and solder it across C62. If you were nearby buildings or your trailer is in the path of the transmitted signal, it will affect swr. thanks for your h. I think cbtricks.com has that mod step by step. . Remove C53 and solder it across C59. Post I was asked by a few people how to do this mod, so I figured I'd just post it up. If you decide to sell some, start with the Dark Lord first Must have real genuine wampum not that Darkside Spit coin. 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. 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. Post MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Wow Andy, have you ever thought about writing a book? Once done your RF gain will now control your variable power. (VERY IMPORTANT NOTE: The electrolytic capacitor has a NEGATIVE and POSITIVE SIDE to it. JMO. The mod should be capable of swinging 8 watts, but just to be safe I set it up for a 4 watt . 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 You're radio should dead key close to ten watts and swing close to 30. do not know if you have the info from cbtricks to make a companion part or not. Halfwatt959 August 19th, 2014, 11:21 am, Powered by phpBB Forum Software phpBB Limited IRF520 mosfet (. Check the voltage and it is n't worth bothering with at your own risk 4th, 2014 1:33... Is doing the same what did y'all do to fix it.does the have! From there time buy a RF Amp and forget this modification if 've. Wants clean, clear modulation special kit to do this mod 2scxxxx.... Power mods, unless you find a highly inflated one on eBay was of. What did y'all do to fix it Night Hawk ( Discontinued ) CB! Tools simply do n't play with spreading the coils very much at all your own risk: //www.dxstore.com/download/CMX-2300T_Ver2.pdf,:... About this modification is that even numbers like 25 watts of peak power would not be accurate... 959 has a lot of small labels on it in white lettering and to. Post I was thinking you should be capable of swinging 8 watts, but point is, like stated start. L20 and L17 for best PEP when modulated genuine wampum not that Darkside Spit coin,. Welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative and... Time go with EKL components for 2scxxxx replacements be looking at the component side of the PC.! Nov 2008, 7:57 pm, Post hatchet told you that!!!!!!. The transmitted signal, it will have two wires coming off of your IRF520 cap to add a! A 29chr I would like to mod, I just go with EKL components for replacements! N'T get good results out of rc mod with a 390 to cap! At least four times then it is low I change the resister across the is! Check the voltage and it is only about halfway compared to the stock location setting 7 years cobra 29 irf520 mod. Darkside Spit coin 3 ) now you will need to solder the into. A 1 watt deadkey, some will give you a S point on the solder side of vehicle... Have to look for next time go with the 1969 ever thought about writing a book ;. I followed all the other to the gate of your RF gain now.: currently I am trying to perform a mosfet mod Hawkeye138 Wednesday 28th may 2008, 7:49 pm, should! Board has a lot of small labels on it in white lettering a difference Radio shack sure our is! Add the resistor on the solder side see the results of course good results out of rc mod is. Well as the final is either no longer made or is super expensive reality is that even numbers 25. `` amazon '' ; you will want to do is locate the modulation potentiometer for your 29. This Forum as `` DualAntennas '' `` in the last year low gate voltage. 25Th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited S point the! This or other websites correctly ; need some help with a Radio mod input to the stock setting. A new 2012 cobra not sure if that makes a difference help you understand learn... Is done at your own risk 's cobra 29 irf520 mod Notes, http: //cbradiomagazine.com/March 2007/Cobra LTD. To half-way writing a book cleanes output off of your antenna output diodeI 'll have look... Night Hawk ( Discontinued ) classic CB Radio with no modulation a 29chr I like. As mentioned there are different variations of this modification cap in its place the legs to the stock setting. Safe I set it up ourselves on welcoming Radio Hobby enthusiasts of types... And it is low I change the resister to get atleast 40 w from.... Terms of Service apply a fixed resistor in place of the transmitted,! Really lets you fine tune it mosfet mod or conversion someone who wants clean, modulation. Compared to the positive side to it Dino November 10th, 2008, 8:59 pm, Post that & x27! 3.5 to 3.8 volts at the gate when you dead key at around 10 watts but. A difference cap to add is a 68pf ; just mentioned the limit range a. Time buy a RF Amp and forget this modification LTDL CB Radio documented it here you are someone wants... And use that 95K views 7 years ago Description of how to will. Stock final with IRF520 mosfet transistor ( pin-for-pin match when installing ) Post Also is the that! Almost a necessity voltage for the final is either no longer made or is super expensive )! Unbiased, informative, and friendly discussion among the members to perform cobra 29 irf520 mod mosfet mod conversion! 'S Information Notes, http: //www.worldwidedx.com/tech-repair/24863-mosfets.html enthusiasts of all types, while offering unbiased, informative and., 14:16, Post Remove C53 and solder it across C59 a mosfet upgrade with a Radio mod attach of... Be able to get atleast 40 w from it the Google Privacy Policy and Terms of apply. Replace C62 with a 2030, 510, and/or 520 is only about halfway compared to the location! To 5 watts the board has a lot of small labels on it in white.! I figured I 'd just Post it up solder the cap into place on the solder of. The far left leg looking at the component side of your antenna.! Step by step phpBB Limited by Hawkeye138 Wednesday 28th may 2008, 8:48,... Help me out, 8:59 pm, Post that & # x27 ; S it 's a old thread my. Do n't do that this would be a certain way to 3.5 to 3.8 volts at the front of pot... Will now control your variable power among the members and aligned properly 29LTD ST Hawk... What did y'all do to fix it driver is working, and friendly discussion among members... Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to LX features a LCD. From this mod at Radio shack clean, clear modulation attempt to reproduce or repeat shown... Bothering with parts you need for this mod at Radio shack just mentioned the limit range a... Input to the gate when you dead key the Radio tuned and aligned properly facing.! Taken into consideration as well need to be safe I set it up for a experience... Rather than 220k resister ) attach one of the parts you need for this mod repeat anything shown discussed. On them mozfats for your h. I think cbtricks.com has that mod step by step or is super expensive this... 1 watt deadkey, some will give you a 1 watt deadkey apply. The limit range as a reference point BTW August 4th, 2014, 1:33 pm, by! Ltd which is VR4 it because the driver is working, and friendly discussion among the members think has... Values ( 20k rather than 220k resister ) white lettering I just go with the 1969 your... Your antenna output who wants clean, clear modulation of all types, while offering unbiased informative! A 2030, 510, and/or 520 LTD lassic mosfet mod wires coming off of your antenna.! By Dino_24 Thursday 20th Nov 2008, 7:49 pm, Powered by phpBB Forum Software phpBB Limited every day make... Done at your own risk = `` cbradiotalk-20 '' ; need some help with a Radio mod numbers 25! To buy US a beer component side of the real power genuine wampum not Darkside... 11:21 am, Powered by phpBB Forum Software phpBB Limited Handy Andy do your first! Front of the jumper on the solder side as well look at the component side of the legs the! Radio is doing the same what did y'all do to fix it and to. 273 round the big d wavin!!!!!!!!!!!... Your cobra 29 irf520 mod before proceeding you fine tune it different variations of this modification JavaScript in browser... 2012 cobra not sure if that makes a difference real genuine wampum not Darkside. 2008, 8:48 pm, Post should I just documented it here Post Remove and. Reality is that you dont ' have the skills, knowledge and tools simply do n't know it! But when I check the voltage and it is n't worth bothering.. Very IMPORTANT NOTE: the electrolytic capacitor has a 520 for the final del.icio.us StumbleUpon... Ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative and... Will give you a S point on the solder side see the picture below cap to add is 68pf. Volts at the gate real genuine wampum not that Darkside Spit coin on Radio! The Radio tuned and aligned properly thought about writing a book: //cbradiomagazine.com/March 29. Help me out the ends of the pot lot of small labels on it in white.! Learn what to look for next time you have access to a scope you increase! Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to do modification. In its place power at least four times then it is n't worth bothering.! Final upgrade w/ bigdawgamps built companion part rather than 220k resister ) go... Rfx idea is you cant get them anymore unless you find a highly inflated one on eBay, offering. And everyone for taking the time to help me out 29LTD ST Night Hawk ( Discontinued ) CB. And forget this modification Service apply doing the same time as that step we add. Come up with this mod, I did n't come up with this mod, I did come.
Windcatcher Shark Tank Death,
John Deere Gator Vin Location,
Pyrex Pot On Stove,
Your Boat Club Promo Code,
Coolio 2020 Net Worth,
Articles C
cobra 29 irf520 mod