Plexi/JCM800 (2204) build report and mods - Metropoulos Forum
2020年4月23日 · I actually used the bright channel volume pushpull to do this (one half of the DPDT), while the other half is used to raise the 2.2nF coupling cap of the bright channel to …
5F6A Mods - Rob Robinette
Pentode / Triode Half Power Switch. This is a simple mod that allows you to cut your output power almost in half. I installed a DPDT (Dual Post Dual Throw) ON/ON mini-switch between the …
Marshall Plexi Mod (More Gain) - Metropoulos Forum
2008年3月18日 · I'm going to be using some of the ideas from the Jose Arredondo schematic that is floating around... Since I've never done anything like this, I'm first going to go to the Egmater …
Demo of my cathode-biased tube-rectified 6V6 Plexi
2017年1月25日 · And it has a trick half-power scheme that disengages the bypass capacitors on the power amp cathode bias resistors (each tube has its own) but I'm not digging it so the …
100W Plexi variable power mod. - The Amp Garage
2008年3月1日 · Any suggestions as to how to efficiently mod a 1967 100W Plexi so that I can put a half power switch?
School me on Marshall Mods - Rig-Talk
2012年8月13日 · From what I gather and have seen the mod uses a stock marshall front end, phase inverter and power section and adds a "urinal cake" which essentially is a circuit that …
Marshall 50w YJM MOD - Rig-Talk
2011年1月25日 · The idea behind this design was to re-create the “recorded tone” of a dimed Marshall plexi that is using a treble booster or preamp “gain box” in the front end, close miked, …
Jvm Mods - Marshall Amp Forum
2018年4月1日 · Personally, I like less negative feedback (more dynamic and tube-like) but others like a tighter power amp. The cap is to correct phase differences that's inherent in that type of …
POST PHASE INVERTER MASTER VOLUME SCHEMATIC LAYOUT FOR PLEXI
2010年8月20日 · Timbo, you gotta add the red caps to a fixed bias power amp to prevent changing the bias with the MV. Without the red caps, the EL34s will melt when the MV is …
Building a Marshall Plexi - diyAudio
2004年3月19日 · As far as power tranformers go, what you need is something like 400-0-400 @ 180mA and 6.3V at 6A. This will be a nice cool running, long lasting transformer as it is over …