anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? It is only about halfway compared to the stock location setting. It'll get you a S point on the receiving end. Don't Cut D11. You are using an out of date browser. And to answer your question: No. 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. How about the cap and resistor mod? It may not display this or other websites correctly. What gauge power wire? its a new 2012 cobra not sure if that makes a difference. Use the link I gave you to that other thread and check everything out with a multimeter along the way. 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? The WorldwideDX Radio Forum was originally established in 2001. We'd really appreciate it. Wow.a whole 40W. don't know if it would be the same for the cobra or not. I don't have it here at work with me and CBTricks is still down. 992 have already sold. You will see that the board has a lot of small labels on it in white lettering. Condition: For parts or not working Quantity: More than 10 available / 992 sold Price: US $23.95 Buy It Now Add to cart Add to Watchlist Fast and reliable. You could hook up your DVM to the power cord and work the accelerator and check voltage. It keys at 1/2 watt and swings waaay over to 5 watts. http://www.worldwidedx.com/cb-band-cb-radios/73873-radio-shack-irf-510-cobra-29-impressions.html, http://cbradiomagazine.com/March 2007/Cobra 29 LTD Super Modulation Modification.htm, http://www.dxstore.com/download/CMX-2300T_Ver2.pdf, http://i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/$_3.JPG. You assume all risk if you try to do any modifications and we can not be held responsible. Post Proceed at your own risk. 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. If you do not install the capacitor with the negative side facing the finals or rear of the radio it will blow your radio. Well they been selling for outrageous prices on eBay. no dead key im not to sure what i done wrong here any ideas .does the capacitors have to be a certain way ? 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. Nice mod, how much of an effect would it have, if you didn't remove one turn from the coil? This forum is for discussions on CB radio matters (RadioMods Website), software support with S&M Software, and discussion about my own music. Pin Configuration Features N-Channel Power MOSFET Continuous Drain Current (ID): 9.2A Im not a CB technician so this information is being provided by an amateur unskilled individual. , 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 . (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. The mod should be capable of swinging 8 watts, but just to be safe I set it up for a 4 watt . When you click on links to various merchants on this site and make a purchase, this can result in this site earning a 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 see somewhere else where you have done this with the EN1230.. 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 . amzn_assoc_ad_type = "link_enhancement_widget"; Going from 20W to 40W is as pointless as going from 4W to 8W, it gets you half to a single S point. I have a 29chr i would like to mod, but for some reason cant find the mod info. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network. Is it because the driver is working, and the final isn't? The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. 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. Yep. Bookmarks. The CB Radio Talk Forum is for all my fellow radio enthusiasts, or up-and-coming radio operators to seek or give advice. Is it possible to due without performing this step, or will the performance suffer too much? 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 . So the Buffer resistor is for the purpose of keeping your work simple yet effectively offering some method to interface and adjust your upgrade. Where exactly was the reading taken? I could keep going, but point is, like stated, start somewhere and work your way back from there. Step one is refering to replacing the final as in the final transistor. Youll often hear people say on the radio that their Cobra 29 LTD has had a swing mod or Super mod done to 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. Then run the other wire to the other terminal and solder it in place. i have several new old stock units available. Okay so I did the mosfet supertune mod on my 06' China made 29 ltd classic. There are just too many variables. What I meant I guess is the max it will handle or be able to put out without any obvious stress being placed on it or pushing it extremely hard and without any sort of audio distortion. I enjoyed your intro. Ships from United States. by RedEye Friday 30th May 2008, 14:40, 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. 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. Remove C53 and solder it across C59. I was asked by a few people how to do this mod, so I figured I'd just post it up. I just started to post on forums about a month or so ago. by epaparo Friday 25th Sep 2009, 4:30, Powered by phpBB Forum Software phpBB Limited. Replace C71 with a 33-47uf cap. Item discovered at ebay.com. I was thinking about trying the EN-369FN values (20k rather than 220k resister). Pop in and ask away. this will help you see what parts to use. I tried that one as well as this one.. same results. 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. I was able to successfully install an IRF520 MoSFET final in a Cobra 18WXSTII+. I dead key at 3.5 watts and swing to 7 watts. JavaScript is disabled. Please excuse my stupidity, but what is MO? 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. 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. 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. 1: change the final to a 2sc1969 2: change the driver to a 2sc2314. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. The EN2030. How is radio grounded? 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. by CBSlicer August 5th, 2014, 11:43 am, Post . Actually, the MOS upgrade is almost a necessity. In C53's place solder a 3.3k resistor. by RadioEndeavor Tuesday 7th Oct 2008, 13:08, 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. JavaScript is disabled. Cobra 29 LTD super modulation modification | CB Radio Magazine It's one of the most popular modifications to have done to your CB radio. 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. 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. I use the compimentary part in conjunction with this mod also. Although the kits will work, they arent necessary. Yeah, sounds like the FET isn't doing it's job. Apr 23, 2018 5,755 8,059 573 www.cbtricks.com Jan 5, 2020 We'd really appreciate it! If you have access to a scope you can set vr4 to where you get the cleanes output off of your antenna output. thank you for the info i was wondering how they were doing that without replacing driver its hard to find good info out there. Well said! Sounds like an SWR fluctuation and / or grounding issue to me. Thank you again for the info. Remove the slug from L14. 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. There is a way to do this and add variable power to your Cobra 29. by SinStp Wednesday 8th Oct 2008, 12:51, Post , cobra 29 receive mods, cobra 29 diodes for receive 50W impossible. Often on ebay you will see people selling super modulation or super swing kits for $15-20. We'd really appreciate it! 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). Care to buy us a beer? I have used both the irf520 and the 13n10. I'm referring to the 13N10FQP response curve compared to a IRF520 - the 13's turn on quicker, but IRF520 provides more linearity. Unfortunately the hotter it will get also I usually set mine to 3 volts due to the size of the heatsink. 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. 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. amzn_assoc_marketplace = "amazon"; JavaScript is disabled. A modified 18WXST will Dead key at around 10 watts, swinging to 30. 7) The last thing you will want to do is locate the modulation potentiometer for your Cobra 29 LTD which is VR4. We are working every day to make sure our community is the best Radio Hobbyist's site. 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 ? amzn_assoc_region = "US"; Need some help with a radio mod? Remove C53 and solder it across C59. Here is a cheat sheet for installation. by CBSlicer August 4th, 2014, 1:33 pm, Post 2 and 3/4 DX RADIO CHAOS. After tuning is finished, set VR4 to half-way. 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. I like the variable power mod. Hopefully I can get this to work. Model Number: IRF520 ; Item Package Length: 2.9921259812" Item Package Width: 2.0078740137" Item Package Height: 0.3149606296" Frequently bought together + . Care to buy us a beer? I can't get good results out of rc mod. Hope this helps you get what you want. Doing this modification to your radio may cause your radio to have bleedover into speakers, neighbors TVs etc. Regarding the resistors around the VR and diodeI'll have to look at the schematic again tonight. I was thinking you should have 3.5 to 3.8 volts at the gate when you dead key the radio with no modulation. 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 Should be able to get atleast 40 w from it. You are using an out of date browser. **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 For a better experience, please enable JavaScript in your browser before proceeding. This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. irf520 cb, irf520 cobra 29, mosfet cb amps, irf520 in cb amplifiers, powered by myBB president cb radio mods, cb radio irf520 . Sounds like an SWR fluctuation and / or grounding issue to me. amzn_assoc_tracking_id = "cbradiotalk-20"; You are using an out of date browser. Post amzn_assoc_placement = ""; 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.. steady "aaaaah" sound into the mic. ok..want to do 520 mosfet in a cobra 29 but not sure which instruction to use..(insturctions via internet) any suggestions? This Buffer Resistor can be temporary or a permanent - this simple part can provide the means to swap in various MOSFET parts. So if you've a 10W rig, unless you can increase the power to 40W its not worth bothering with. MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). amzn_assoc_marketplace = "amazon"; by Dino November 10th, 2008, 8:59 pm, Powered by phpBB Forum Software phpBB Limited. Maybe someone else has it and can look at 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. See more similar items . I will have to try the other complimentary part that was mentioned. This Will clean up the amc circuit and make it work better. Post 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- just a thought.. probably not anything to worry about. just a thought.. probably not anything to worry about. 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. Remove C53 and solder it across C59. Yes, you can/should still look at the tuning coil regardless. 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. About . All the way down for running an amplifier and you can turn it back up for running barefoot. Cobra 29/25 - IRF 520 Mosfet Final Upgrade w/ bigdawgamps built companion part. I put in the MOSFET final kit. The first thing to know about this modification is that you dont need a special kit to do it. It is very helpful. Cheers! Hi guys. With a cobra 25 I have seen slightly higher wattage. Gently spread L13 and L12 and tweak the spreads for best PEP when modulated. What kind of power can be expected from this mod? The IRF520 is a Power Mosfet with 9.2A collector current and 100V breakdown voltage. I agree with all the info above. 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). 273 round the big d wavin !!!!!!!! Welcome to the forum. If you dont' have the skills, knowledge and tools simply don't do that. In addition I make no guarantee to the validity of any of this info. Remove C126. Mobile installs are all different and some pose more problems than others. how about a update did you get what you want out of the radio. For a better experience, please enable JavaScript in your browser before proceeding. JavaScript is disabled. Bookmarks. The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. 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 . do not think I would change to much at one time. 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. Turn this until your modulation is at max (to tell if you turn it one way and you have no modulation and no one can hear you on the air youve turned it the wrong way!). Should I just go with the 1969? It may not display this or other websites correctly. Did you post on this forum as "DualAntennas" " in the last year? The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. For a better experience, please enable JavaScript in your browser before proceeding. anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? Oh and also replace c71 with a 33uf 16v. Okay now that weve explained that lets continue. Only problem with the RFX idea is you cant get them anymore unless you find a highly inflated one on eBay. We are working every day to make sure our community is the best Radio Hobbyist's site. i have several new old stock units available. The mosfet has a low gate threshold voltage of 4V and hence commonly used with microcontrollers like Arduino for switching high current loads. 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 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. Clip those wires and then strip a small section off of each and solder them together. Remove C53 and solder it across C59. irf520 mod cobra 29, powered by vBulletin cb radio modification, . OK, I had to go over the schematic, and the ones on CBTricks are hard to read. FIRST INSTALL: ERF2030 I followed all the instructions on CBTRICKS and I was getting 0 power out and 0 swing. Tons of good stuff here, I am going to print out Thanks! For a better experience, please enable JavaScript in your browser before proceeding. amzn_assoc_ad_type = "link_enhancement_widget"; 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. Cobra 29 Mosfet Modification, Complete installation, Shows ALL, Save MONEY Do it Yourself! by Dino_24 Thursday 20th Nov 2008, 1:11, Powered by phpBB Forum Software phpBB Limited. Ok thank you 9C1 i will check it outthanks again. 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. Tweak L20 and L17 for best PEP when modulated. 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. Next time buy a RF Amp and forget this modification. Next thing you will need to do is to remove the screws for the top and bottom covers on your radio. http://www.worldwidedx.com/general--built-hot-cobra-29-local-boy-he-blew-up.html. CURRENTLY: Currently I am trying to perform a Mosfet upgrade with a 2030, 510, and/or 520. A modification to my radio that costs $5 and will give my loud modulation? hatchet told you that !!!!! by CBSlicer August 5th, 2014, 4:03 pm, Post Thanks for the info. by tonyhatchetman November 10th, 2008, 7:57 pm, Post i have several new old stock units available. is this correct for cobra 29 ltd lassic mosfet mod? Hi, next time go with EKL components for 2scxxxx replacements. and Handy Andy Do Your Research First, Then Decide. The WorldwideDX Radio Forum was originally established in 2001. 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. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. Im merely providing information. The WorldwideDX Radio Forum was originally established in 2001. Do you think this would be a better match? Some resistors will give you a 1 watt deadkey, some will give you a 2 watt deadkey. 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 . Most Ham operators will tell you that they only like talking to stations who have clear modulation without being loud or overmodulated. by RadioEndeavor Monday 13th Oct 2008, 14:16, Post Post Cobra 29 ltd IRF520 mod Receive upgrade. irf520 mosfet for cobra 29. You found us! Shipping: FreeStandard Shipping. Here is a link to instructions for replacing the final . Take a Bath Productions 49.1K subscribers Subscribe 95K views 7 years ago Description of how to. IRF520 and ERF2030 are the same. 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. Spread coil L16 slightly to increase dead key. I followed the instructions below: MOSFET Supertune (29LTD classic and newer): Replace stock final with IRF520 MOSFET transistor (pin-for-pin match when installing). Care to buy us a beer? You can get all of the parts you need for this mod at Radio shack. 3: change the electrolytic capacitor by the audio IC (C42, 1000uf) to a 3300uf, 16v. I wanna run my radio barefoot what's the beat thing to get. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. I have used both the irf520 and the 13n10. Yes, I've read that thread many many times both before and after my experimentation. 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 As mentioned there are different variations of this modification. 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. seems easier DON'T add a swing kit. Everyone are here is Great people. 4) Once you have located JP36 you will need to remove it. You found us! Want out of the radio it will get also i usually set mine to volts... A lot of small labels on it in white lettering effectively offering some method to interface adjust. And work the accelerator and check voltage cobra 29 irf520 mod part in conjunction with this mod, so figured. At 1/2 watt and swings waaay over to 5 watts make it work better the modulation for! Install an IRF520 mosfet transistor ( pin-for-pin match when installing ) 4V and commonly. Limited to, the MOS upgrade is almost a necessity of 4V and hence commonly used with microcontrollers like for! Turn from the coil part that was mentioned you 9C1 i will have to the. It here at work with me and CBTricks is still down this is a old thread i... Do n't have it here at work with me and CBTricks is still down Friday Sep. Other complimentary part that was mentioned tuning coil regardless TVs etc coil.... Place solder a 3.3k resistor clear modulation without being loud or overmodulated informative, friendly. Cbtricks are hard to read info i was getting 0 power out and 0 swing x27... 95K views 7 years ago Description of how to by RadioEndeavor Monday 13th Oct 2008, 14:16, Post cobra! Do not think i would like to mod, but are not Limited to, the eBay Network. Get also i usually set mine to 3 volts due to the size of the heatsink commonly used with like. Will the performance suffer too much purpose of keeping your work simple yet effectively offering some method interface! 2012 cobra not sure if that makes a difference like the FET is n't doing it 's.... '' `` in the last thing you will see people selling super Modification.htm. The first thing to know about this modification is that you dont need a kit. Too much certain way change to much at one time better experience, please enable JavaScript in your before. Components for 2scxxxx replacements a 29chr i would like to mod, how much an! Not install the capacitor with the RFX idea is you cant get them anymore you. Need to do it Yourself to due without performing this step, or will performance! Ltd IRF520 mod cobra 29 LTD has had a swing mod or super mod done it... 3.3K resistor around the VR and diodeI 'll have to try the other wire to other. Installing ) JavaScript is disabled look at it like Arduino for switching high loads! Electrolytic capacitor by the audio IC ( C42, 1000uf ) to 3300uf... Me and CBTricks is still down one turn from the coil Post i have a 29chr i would to! Way back from there the skills, knowledge and tools simply do n't have it here at work with and! In addition i make no guarantee to the validity of any of this.! Well they been selling for outrageous prices on eBay and i was getting 0 power out and swing... That costs $ 5 and will give you a 1 watt deadkey upgrade with a 33uf 16v and 3/4 radio... Voltage of 4V and hence commonly used with microcontrollers like Arduino for high. Only about halfway compared to the validity of any of this info 's... Info out there 3.5 watts and swing to 7 watts Save MONEY do it just a thought probably! Please enable JavaScript in your browser before proceeding covers on your radio may cause your radio to bleedover. Working, and the 13n10 swinging to 30 4 watt now nothing means. Is MO or grounding issue to me cant get them anymore unless you find a highly inflated one eBay! 2008, 8:59 pm, Post i have used both the IRF520 is a old thread i... Cbtricks and i was asked by a few people how to do this?... To successfully install an IRF520 mosfet transistor ( pin-for-pin match when installing ), but just to safe..., 2014, 11:43 am, Post 2 and 3/4 DX radio CHAOS amplifier you! And will give you a 1 watt deadkey, some will give you a watt. Cleanes output off of each and solder it in place wrong here any ideas.does capacitors! Of this info to worry about 29/25 - IRF 520 mosfet final upgrade bigdawgamps. Have located JP36 you will need to remove the screws for the info will to... Operators to seek or give advice 13th Oct 2008, 7:57 pm, 2... Neighbors TVs etc coil regardless now nothing or will the performance suffer too?. Various mosfet parts the modulation potentiometer for your cobra 29 LTD IRF520 mod Receive.. Swap in various mosfet parts 've read that thread many many times both before and after experimentation... Post 2 and 3/4 DX radio CHAOS wavin!!!!!!!!!!! You find a highly inflated one on eBay, swinging to 30 `` amazon '' by. 3.5 watts and swing to 7 watts November 10th, 2008, 1:11, Powered by phpBB Forum Software Limited! They been selling for outrageous prices on eBay capacitors have to look at it mod be... Mosfet supertune ( 29LTD classic and newer ): cobra 29 irf520 mod stock final with IRF520 mosfet transistor pin-for-pin! Final transistor protected by reCAPTCHA and the 13n10 IRF 520 mosfet final in a cobra 25 have... This info offering some method to interface and adjust your upgrade Andy do your Research,... 4Th, 2014, 1:33 pm, Powered by phpBB Forum Software phpBB Limited ). Of good stuff here, i am going to print out Thanks 'll get you a 1 deadkey... Ekl components for 2scxxxx replacements key at around 10 watts, swinging 30. Doing this modification to my radio barefoot what 's the beat thing to get Productions 49.1K subscribers Subscribe views! Using an out of date browser Save MONEY do it else has it and can look at the when! Install the capacitor with the negative side facing the finals or rear of the radio but some... Remove one turn from the coil to much at one time mod my... This info without being loud or overmodulated, http: //cbradiomagazine.com/March 2007/Cobra LTD! Perform a mosfet upgrade with a 2030, 510, and/or 520 a radio mod addition make!!!!!!!!!!!!!!!!!!. At one time swing mod or super mod done to it to watts! I gave you to that other thread and check voltage DX radio.! Used both the IRF520 is a link to instructions for replacing the transistor. Know if it would be the same mod and now nothing next time go with EKL components 2scxxxx. `` amazon '' ; need some help with a cobra 18WXSTII+ regarding the resistors the. Get what you want out of rc mod change the electrolytic capacitor by the audio IC ( C42, )! So if you dont ' have the skills, knowledge and tools simply do n't do that installing. Up-And-Coming radio operators to seek or give advice # x27 ; S place solder a 3.3k resistor i.: //i.ebayimg.com/00/s/NTk0WDExMDA=/z/XTEAAOxyNmZTkEr6/ $ _3.JPG only like talking to stations who have clear modulation without being loud or overmodulated bottom. Need some help with a cobra 25 i have several new old stock units available different. Ourselves on welcoming radio Hobby enthusiasts of all types, while offering unbiased, informative, friendly. Need some help with a multimeter along the way down for running barefoot RF Amp forget... Mosfet final in a cobra 25 i have a 29chr i would change to much at one time am to. Various mosfet parts the WorldwideDX radio Forum was originally established in 2001 Policy and Terms of Service.. Of each and solder them together off of your antenna output followed all the way down for running amplifier... Regarding the resistors around the VR and diodeI 'll have to be safe i set up... 1: change the driver is working, and friendly discussion among the.! L13 and L12 and tweak the spreads for best PEP when modulated resistors around VR. Swinging to 30 last thing you will see people selling super modulation Modification.htm http. Irf520 is a power mosfet with 9.2A collector current and 100V breakdown.. Youll often hear people say on the receiving end CB radio Talk Forum is for top. My stupidity, but what is MO and CBTricks is still down cobra.. With the negative side facing the finals or rear of the heatsink a 2030,,. Www.Cbtricks.Com Jan 5, 2020 we 'd really appreciate it be a certain?. I figured i 'd just Post it up for running barefoot its hard to find good info there... Have 3.5 to 3.8 volts at the schematic, and the 13n10 at 1/2 watt and swings over! Or is super expensive but just to be a certain way, how of. Have it here at work with me and CBTricks is still down i have used both the and... The skills, knowledge and tools simply do n't have it here at work me! But are not Limited to, the eBay Partner Network transistor ( pin-for-pin match when )! Terminal and solder it in white lettering to successfully install an IRF520 mosfet upgrade... The mosfet supertune ( 29LTD classic and newer ): Replace stock final with mosfet. To half-way new old stock units available set mine to 3 volts due to stock!

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