Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Was There a Heathkit W-1M or WM?
Was There a Heathkit W-1M or WM?
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 April 2009, 02:40 AM   #1
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Question Was There a Heathkit W-1M or WM?

I know the Heathkit Williamson W-3M very well. It was the first amplifier that I worked on as a young kid. It was old at the time - caps were probably getting old. This Heathkit version used 5881's, UL, and an Acrosound output transformer.

I found the W-2 Schematic on the net which also uses 5881s, is UL, but has a Peerless output transformer.

I'm working on what I think is a Heathkit, but with 807s, triode connected, and a Peerless OT without UL taps. Here's a picture:
http://baselaudiolabs.googlepages.com/Williamson3.JPG

Was there a version like this from Heathkit, an earlier Williamson? Confirmation or any more info would be appreciated.

Pete B.
  Reply With Quote
Old 18th April 2009, 03:22 AM   #2
tomtt is offline tomtt
diyAudio Member
 
tomtt's Avatar
 
Join Date: Aug 2002
Location: kansas city mo, and on occasion, around the world ...
http://www.heathkit-museum.com/hvmhifi.shtml

http://en.wikipedia.org/wiki/Heathkit


http://www.hifilit.com/hifilit/Acrosound/acrosound.htm


10/?
  Reply With Quote
Old 19th April 2009, 03:09 AM   #3
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Thanks, the Acrosound data is new to me, but saw the rest. I've not seen anything on a Heathkit with 807s.
I should probably write to one of the Heathkit historical sites.

Pete B.
  Reply With Quote
Old 19th April 2009, 03:19 AM   #4
DHT112A is offline DHT112A  United States
diyAudio Member
 
Join Date: Jun 2005
Location: Tacoma , WA
Just a shot but maybe

http://www.retrovox.com.au/A515.pdf
  Reply With Quote
Old 19th April 2009, 04:05 AM   #5
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Yes, I have that also. That seems to be the paper where 6L6 type tubes such as the 807 were tested in place of the original KT-66. The 6l6 types were not rated for the higher plate and screen voltage used in the Williamson. All the Heathkit Williamsons that I've mentioned use a 420-440V plate supply.

That paper does seem to be the basis for the one that I have triode connected rather than Ultra-Linear, and using 807s. I think this is a very early Heathkit implementation. That design seems to be one chassis, and uses more choke filtering. Other than that it is very close to this unit.

Thanks,
Pete B.
  Reply With Quote
Old 19th April 2009, 05:18 AM   #6
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Here's a discussion:
http://www.antiqueradios.com/forums/...a62aa9e043db2c

And more AWV Radiotronics scans:
http://greygum.net/radiotronics/
  Reply With Quote
Old 20th April 2009, 07:24 PM   #7
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Heathkit WA-1 is listed here with a picture of the power supply alone:
http://www.nostalgickitscentral.com/...kit_audio.html
  Reply With Quote
Old 20th April 2009, 08:35 PM   #8
Tom Bavis is offline Tom Bavis
diyAudio Member
 
Tom Bavis's Avatar
 
Join Date: Jun 2002
Location: Macedon NY
Gary Kaufman said that there were two versions of the W1 - triode (earliest) and ultralinear - and said he had both schematics. You might give him an email: gkaufman(at)the-planet(dot)org.
  Reply With Quote
Old 21st April 2009, 04:28 AM   #9
PB2 is offline PB2  United States
diyAudio Member
 
PB2's Avatar
 
Join Date: Sep 2004
Location: North East
Thanks, yes I saw that in his post on the linked forum above. I will email him and see if I can get more information about this particular unit.
  Reply With Quote
Old 21st April 2009, 04:22 PM   #10
The-Planet is offline The-Planet  United States
diyAudio Member
 
Join Date: Mar 2003
Location: New Hampshire
Yup, that's the output section of the W1.

Hopefully you have the power supply section as well. Same shape chassis with a potted power transformer, choke and 5V4G.

Send me a private email and I can set you up with manual/schematic etc.

- Gary
  Reply With Quote

Reply


Was There a Heathkit W-1M or WM?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Heathkit AS 101's jshirar Swap Meet 3 23rd April 2009 03:35 PM
Heathkit aa-121 maritimer Tubes / Valves 4 16th July 2008 03:45 PM
Heathkit A7 ? adalin Tubes / Valves 4 14th November 2004 05:05 PM
Heathkit TT-1A lpd Swap Meet 0 21st November 2003 05:01 AM
Heathkit EA-2 Hewie Tubes / Valves 6 14th October 2003 06:41 PM


New To Site? Need Help?

All times are GMT. The time now is 09:06 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio
Wiki