diy

  1. G

    New amp design based on Origin 20 - Part 2

    Hi all! This is the continuation of the Thread: New amp design based on Origin 20 Based on an Origin 20 I replaced the main PCB with a custom one. This second revision is loosely based on a JCM 800 JEL design with other mods from the first revision. Attached you find the schematics and the BOM...
  2. Xenrelic

    Marshall SV20H Full Board Set Plus Knobs For Sale

    I have a full board set from a brand new Marshall SV20H if anyone is interested in it. I also have a dropbox folder with all the schematics, hookup pictures, voltage chart, transformer pictures/specs, chassis pictures/specs and a faceplate pdf to help you complete the build. Hit me up. SV20H Files
    • Xenrelic
    • Thread
    • 20 watt board set diy marshall plexi studio vintage sv20 sv20h
    • Replies: 0
    • Forum: Member Classifieds
  3. Michael Inglis

    Modified MOD102+ Build Progress (Fender Champ Style 5 Watt Build with S.S. Rectification)

    EDIT: Ah shit, i posted this in "The Workbench" not "Building the Classics" If a mod sees this, could you move it? Thanks! Well i finally had some time the past couple days to start the MOD102+ project ive been planning. The MOD102 and MOD102+ is a Fender Champ style amp with SS rectification...
  4. ckaudio

    SV20 - Bright Cap Mod is Worth it

    Hi all - I’ve been a Studio Vintage SV20 owner for a couple of years now. While I quite love the amp I’ve never truly been able to love the bright channel as much as I’d like to. I felt like the normal channel was too dark and the bright channel was too bright, and when cranking the bright...
    • ckaudio
    • Thread
    • bright cap diy marshall studio vintage sv20 sv20 bright cap sv20 mods
    • Replies: 90
    • Forum: Marshall Amps
  5. MatFnEhUK

    DIY grill cloth replacement

    I’m debating changing the grill cloth on my 4x12 and some advice from those of you with experience doing this would be appreciated. I’ve always loved the look of those 80’s JCM 800 era faded grill cloths. But a material like that is not going to be easy to find, so the next best thing for me...
  6. Chris-in-LA

    Amp Parts Direct

    It looks like Amp Parts Direct is making a big push to try to get the replacement transformer market.
  7. KyrosK

    Hello guys, new Guitarist/DIYer here :)

    Hello everyone! I'm a long time fan of the forum, since I started messing with pedals, amps and guitars. (messing meaning destroying propably :P) I just need some help. What is the suitable thread to post amp mod questions and is there any section for discussing new songs? (for some...
  8. W

    JCM800 custom build prices - UK 2020/21

    Hi all, I did a quick search on these forums but didn't really come up with any close answers for 2020/2021 dates - just a lot of old outdated threads and US prices. I'm looking at a few diy custom hand built schematics for a JCM800, and just wondered if anyone knew a ball park figure for a...
  9. Tore knutsen

    Combo amps

    Hi everyone! Hope you are doing ok in these Corona times. I'm gonna build at jtm50 clone, and I'm gonna make it look as a bluesbreaker combo. Anybody here who has done something like that? I really think the looks of the bluesbreaker are really classic. Cheers
  10. Michael Inglis

    Just built a Brian May style treble boost....love it!!!

    This is a brian may TB veroboard project, if you wanna build one the veroboard diagram is all over online. It sounds great. Still waiting on my control knobs. The switch is the tone control. The middle position is stock(treble) the top position is mids and the bottom is bass. The volume control...
  11. InfernoChicken

    A/b/y Pedals: Switching Channels On A Jcm800 2204

    So I built a sweet JCM800 2204 last year and it is the sound I was always looking for!! Both channels sound great, but for me, as for many others, the HIGH input is the way to go. But if you need a real clean tone, I mean really clean, by not only rolling down the Volume Knob on your guitar...
    • InfernoChicken
    • Thread
    • 2204 channel switch diy electronics jcm800 pedal pedals and marshall
    • Replies: 8
    • Forum: Marshall Amps
  12. SpHj

    Some Sort Of Marshall Clone Build...

    So I happened into a bunch of parts last week for real cheap (Smallbox Headshell, Steel chassis, 800 Plexi faceplate, & a set of Classic Tone 800 transformers). I've got most of the small parts on hand as I repair amps locally so there's really not much more to pick up and have a great clone of...
  13. InfernoChicken

    Jcm800 2204 / Oscillating Whistle/high Pitch Noise When Turning Power Off

    Hi, already posted about my amp project, the other (solved) issue is going into another topic, so here, fresh, my newest issue. So I am building a 2204 jcm800, already kinda working. Presence does not work, i dont know if this is related to this issue. The amp makes this strange oscillating...
  14. InfernoChicken

    Which Fuse Characteristics For Main And Ht?

    Hi im new to this forum and this is my first post. This forum is really awesome, so many knowledge inside here, glad I joined! :) Now to my problem: I have completed my very first build (JCM800 2204) and am now troubleshooting a problem. Powering up seems to be no problem, but as soon as I...
  15. I

    Jcm800 2204 Bias Problem

    Hi, I have a problem with my jcm800 2204.The bias current in el34s goes up to 10ma max. I turn the potenciometer all the way up and all I can get is 10ma per tube. I measure the output voltage of the el34s and is about 468v.
  16. Mr. Nick

    I Can't Decide Which Amp To Build...

    Good morning, evening, or afternoon wherever you may be... Ive already posted other threads as I wanted to build a 50 watt Plexi. Unfortunately it is not that simple. Im getting lost in the model numbers, names, and everything else. It seems that there is a different schematic for everything...
  17. Jeffv145

    2205 Or 2210

    Does anyone own both? I would prefer the 2205 to save on maintenance, but if they sound bad I'm not going to mess with it. Do the 2205s weigh much less? I've owned a 2203 for a few years, but my buddy's 2210 (on gain) has that distinct soapy growl I can't live without. I'm trying to capture the...
    • Jeffv145
    • Thread
    • adolescents bad religion descendents diy green day jcm 800 punk
    • Replies: 25
    • Forum: Marshall Amps

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