Restoring Baldwin 40 watt amps - 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 4th December 2010, 05:08 PM   #1
ratbagp is offline ratbagp  United States
diyAudio Member
 
Join Date: Mar 2008
Location: North East, MD
Default Restoring Baldwin 40 watt amps

I'm at the very early stages of restoring a couple of Baldwin 40 watt amps that Doug Piccard gave me several years back. There is some information about these amps scattered all over the web (including DIY Audio), so I have created a blog to try to bring these together and help me keep track of where they are.

The blog is at Baldwin 40 watt amplifier

Towards the end of the first entry I have some questions I would like some help with, particularly the connection of the choke to ground. Any answers would be appreciated.

ray
  Reply With Quote
Old 4th December 2010, 05:43 PM   #2
diyAudio Member
 
artosalo's Avatar
 
Join Date: Feb 2010
Quote:
I would like some help with, particularly the connection of the choke to ground.
This connection is a typical choke input filter even though the choke is situated in an unusual place.

Same circuitry is presented in Radiotron Designer's Handbook 4 Edition at page 1163 (fig. 30.1G). Here the choke is also located between ground and the center tap of power transformer.
  Reply With Quote
Old 4th December 2010, 06:33 PM   #3
ratbagp is offline ratbagp  United States
diyAudio Member
 
Join Date: Mar 2008
Location: North East, MD
OK thanks. I suspected that it might be a variation of the choke input filter but it did seem different from anything I had seen before.

I've downloaded RDH4 and posted the diagram on the blog.

Thanks,

ray
  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
FS: Radio Shack 40-1354a, 40-1197, 40-1242e db6546 Swap Meet 2 26th November 2009 12:11 PM
JJ 2A3-40 Watt? sgerus Tubes / Valves 0 10th July 2006 03:44 PM
Why is 40 volts DC comming out of my amps left channel? sound_prodigy Solid State 4 14th March 2006 05:44 PM
FS: Scott Nixon LM3875 40 watt Amplifier Modules Firebottle Swap Meet 1 30th November 2004 06:59 AM
10k a-a/40 Watt Output Iron Bandersnatch Swap Meet 8 15th November 2004 12:39 PM


New To Site? Need Help?

All times are GMT. The time now is 08:30 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