Stromberg-Carlson project - 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 29th March 2005, 07:32 AM   #1
diyAudio Member
 
Join Date: Mar 2005
Location: Oregon
Default Stromberg-Carlson project

I just picked up a Stromberg-Carlson Model 20 PA amp for conversion into a guitar amp. It' sfrom the forties; two huge white chickenhead knobs on the front. Where do I start? WHo has schematics? Will human sacrifice be necessary to get it running? Thanks.
Attached Images
File Type: jpg stromberg.jpg (6.6 KB, 1155 views)
  Reply With Quote
Old 29th March 2005, 07:43 AM   #2
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
Wow! Great! You could avoid remounting in a separate enclosure... that looks so cool!

The first thing in pa-guitar amp job is to check if the pa works as it was intended to work. First repair the pa then convert it to guitar amp. Sorry, no schematics. Could you tell us what tubes are inside?
  Reply With Quote
Old 29th March 2005, 08:26 AM   #3
Banned
 
Join Date: Jan 2005
pics PICS Take some pics of the inside.
  Reply With Quote
Old 29th March 2005, 11:14 AM   #4
diyAudio Member
 
Join Date: Sep 2003
Location: iowa
Default schematic

My experience with Strombergs of this era is that the schematic is pasted on the inside of the bottom cover. Have you opened it up?

Michael
  Reply With Quote
Old 29th March 2005, 12:54 PM   #5
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
I think that the guy hasn't recived yet the amp in question... just look at the ebay logo under the picture...
  Reply With Quote
Old 29th March 2005, 01:10 PM   #6
diyAudio Member
 
richwalters's Avatar
 
Join Date: Sep 2003
Location: Alps:Tube amp designs over 150W, SMPS guru.
Poss Duncan amps..for schematics.....
Watch out..........Sometime ago I across a golden oldie with AC/DC chassis of the sim vintage.....double check mains/line input.

richj
  Reply With Quote
Old 29th March 2005, 07:45 PM   #7
diyAudio Member
 
Join Date: Mar 2005
Location: Oregon
I do indeed have the amp; I bought it on FleaBay and it was delivered yesterday, but posting the auction pic was quick and easy.

And it's pretty rough. A cap can is physically disintegrating, the wires out of the octal connectors have been cut, and it looks like it's been sitting for about thirty years. That's the bad news. The good news is that there don't seem to be any major corrosion issues, the cloth covering on the wires is intact and not fragile, and the solder connections look solid. And, it looks cooler than anything I've owned in my 47 years.

More bad news: no schematic on the bottom cover, because there is no bottom cover.

Lots of work before it comes within ten feet of live electricity, but I'm psyched.
  Reply With Quote
Old 29th March 2005, 07:51 PM   #8
Banned
 
Join Date: Jan 2005
So take some pics, i want to see this thing! Both inside and outside. What tubes does it use ?
  Reply With Quote
Old 29th March 2005, 08:37 PM   #9
diyAudio Member
 
Join Date: Mar 2005
Location: Oregon
Photos will follow tomorrow; the tube lineup is 5U4, 6L6, 6L6, 6N7, 6J5, 6SJ7, 6SJ7.
  Reply With Quote
Old 30th March 2005, 10:36 AM   #10
Giaime is offline Giaime  Italy
diyAudio Member
 
Giaime's Avatar
 
Join Date: Oct 2004
Send a message via MSN to Giaime
Quote:
Originally posted by majorarmspeed
5U4, 6L6, 6L6, 6N7, 6J5, 6SJ7, 6SJ7.

YOU ARE A LUKY MAN! those tubes are very useful in a guitar amp... especially the 6L6 outputs...
  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: Stromberg Carlson AU-57 tube amp whitelabrat Swap Meet 8 18th December 2010 05:26 AM
Stromberg-Carlson ASR-433 Bran Kulez Tubes / Valves 10 20th October 2009 07:23 AM
Stromberg Carlson ASR 533 kc5scs Everything Else 0 22nd January 2008 02:58 AM
Stromberg Carlson speaker...please help. the_manta Multi-Way 5 7th March 2007 02:20 AM
Stromberg-Carlson 433 : Add standby or not? Vespasian Tubes / Valves 6 17th December 2006 11:15 PM


New To Site? Need Help?

All times are GMT. The time now is 02:41 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