Extra gain stage Marshall plexi 50watt - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 21st March 2004, 08:35 AM   #1
edsmith is offline edsmith  Australia
diyAudio Member
 
Join Date: Mar 2004
Location: Australia
Question Extra gain stage Marshall plexi 50watt

Hi,
I am building a plexi 50 watt and am working out my options.
On the thunder tweak website they have done some modifications on the 50 watt plexi and have sent the first gain stage directly into the next(their version is only single channel).

ModifiedPlexi:
http://sonicdeli.com/ThunderTweakWeb/topfuellayout.htm

Normal Plexi:
http://sonicdeli.com/ThunderTweakWeb/m-typelayout.htm

I was wondering if I could have a 2 channel (normal, bright) amp like a normal plexi, but have a switch that in positon 1 it would:

Send the signal from Normal volume pot(1M) to the 470k mixer resistor.

And in position 2 it would:

Take the signal from the Normal volume pot and send it straight back down into the gain stage for the bright input(pin 7 V1), like the thunder tweak version.

But, would having the normal signal being fed into the bright gain stage screw things up if I had something plugged into the bright channel?

Would this idea work, or do I have no idea what I'm talking about?

Thanks guys
ed
  Reply With Quote
Old 22nd March 2004, 04:58 PM   #2
Mark_S is offline Mark_S  United States
diyAudio Member
 
Join Date: Mar 2004
Location: Illinois
you could try using a dpdt switch and use the other set of contacts to disconnect the bright input jack when you are in the high gain position.

If you just use a spdt switch and you have something else such as another guitar pluged into the bright input it will be like putting a resistor ( and some inductance and capacitance ) at that point and tying the other end to ground.
The some of the signal from the normal channel will be sent through the other guitar and you might even be able to change the sound of overdriven signal by changing the tone, volume ,and pickup settings on the unused guitar.
__________________
Mark_S
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Marshall AVT 50 preamp gain/distortion increase Voland Tubes / Valves 3 27th November 2010 01:05 PM
Marshall Valvestate 8080 low gain on Boost Channel mgjimbo Solid State 0 28th May 2008 02:04 AM
Building Marshall Plexi zxx123 Tubes / Valves 1 19th June 2004 03:01 PM
Building a Marshall Plexi edsmith Tubes / Valves 10 18th May 2004 05:38 AM
50watt Plexi Again edsmith Tubes / Valves 2 23rd March 2004 07:14 PM


New To Site? Need Help?

All times are GMT. The time now is 03:53 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2