Adams Amp Discussion, please help! :) - 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 18th March 2005, 09:12 PM   #1
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
Default Adams Amp Discussion, please help! :)

Hello, I finally got a copy of the schematic for my amp scanned...here is a piece of it:

What I want to do is replace the auxillary volume pot with just a normal 1 meg pot and use an aux input as a separate channel. Next I want to put the master volume just after the plate of V1B. Would the master volume pot be the same? and would I just connect the mic volume output to the grid of V1B? Any suggestions would be helpful
Attached Images
File Type: gif schematic.gif (14.0 KB, 463 views)
__________________
Guitar is Good
  Reply With Quote
Old 21st March 2005, 03:48 PM   #2
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
Angry grrrrr......

grrrr........
Attached Images
File Type: png schematic.png (30.7 KB, 491 views)
__________________
Guitar is Good
  Reply With Quote
Old 21st March 2005, 10:51 PM   #3
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi 9am53
Nice tube. Reminds me of a Bogen amp schematic.

-Chris
  Reply With Quote
Old 24th March 2005, 03:23 PM   #4
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
yeah, it is a Bogen CHB20A...do you have any suggestions about the stuff I proposed in the first post of the thread?
__________________
Guitar is Good
  Reply With Quote
Old 24th March 2005, 06:25 PM   #5
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
any suggestions abaout my proposed modifications? will my ideas work or are there any major flaws with my ideas? I dont want to start cutting and soldering only to find out I messed something up...
__________________
Guitar is Good
  Reply With Quote
Old 25th March 2005, 02:25 AM   #6
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi 9am53,
What are you trying to accomplish? You need the extra gain V1a gives you for the mic. Are you trying to make a mixer?
From what you have said, I'd use the circuit as is. You can replace the AUX pot with a single 1Meg if you don't like the way it works now.
-Chris
  Reply With Quote
Old 28th March 2005, 03:45 PM   #7
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
Ok, I guess I could be more specific...I would just like to make a simple guitar amp...not a mixer of any sort. I was thinking I could use the mic channel as a "hotter" channel, and the aux channel as a quieter channel...but I have never done this before, so I have no clue if I can use the aux channel as a guitar channel...let alone what it would sound like. I dont really need the second channel at all, so I think I will start off with just the mic channel. Also, I read in an article "converting PA amps into Guitar amps" that the master volume should go after the second amp stage, that is why I want to move the master volume.
__________________
Guitar is Good
  Reply With Quote
Old 29th March 2005, 01:03 AM   #8
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi 9am53,
You need high gain for both the mic and pickup. You do not want to move the master behind the tube because you are driving the tone control ciruit from there. It looks like you need to add a tube stage before that point.
-Chris
  Reply With Quote
Old 29th March 2005, 04:24 PM   #9
9am53 is offline 9am53  Canada
diyAudio Member
 
Join Date: Feb 2005
Location: Ontario
Send a message via MSN to 9am53
Ohh I see, so I need a tube section before every individual circuit...ie, I cant have the tone circuit and a volume control next to each other without a tube section in between. Cool, thats not a problem at all. So from the sounds of it I just need to change my tone stack to be more suitable for guitar... Can I use the mic volume as a pre-amp volume? Speaking of which, can I keep the 1 Meg pots for the volume controls, or will I have to replace them? thanks for all your patience and help
__________________
Guitar is Good
  Reply With Quote
Old 31st March 2005, 02:10 AM   #10
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi 9am53,
The best thing for you do do is check out a bunch of Fender schematics, Hiwatt or Marshall. Whatever. After looking at these I thing you'll have a very good idea on how to do this. You are on the right track. I forsee success in your future.
-Chris
  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
John Adams, Harmonium eStatic Music 4 8th February 2008 05:15 PM
Car HU Discussion fr0st Digital Source 4 11th March 2004 08:42 AM


New To Site? Need Help?

All times are GMT. The time now is 01:19 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