strange tube? E-8128 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs 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

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
Thread Tools Search this Thread
Old 11th January 2009, 06:13 PM   #1
Electar is offline Electar  United States
diyAudio Member
Join Date: Jan 2009
Default strange tube? E-8128

I have a few guitar amps from the 30's and 4o's .the one from the 40's has a Black metal tube that reads

E-8128 clarostat

I cant find any info on it or any codes for testing.

  Reply With Quote
Old 11th January 2009, 06:32 PM   #2
diyAudio Member
Tom Bavis's Avatar
Join Date: Jun 2002
Location: Macedon NY
Clarostat made resistors - could that be a clue?

This is probably a ballast resistor for a series heater string. Such amplifiers are potentially very hazardous unless an isolation transformer is used.
  Reply With Quote
Old 13th January 2009, 01:21 PM   #3
Electar is offline Electar  United States
diyAudio Member
Join Date: Jan 2009
I added an isolation transformer in line, I would like to test that resistor but i cant find any info on it,or another one.Its been getting hotter and hotter lately.

  Reply With Quote


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
strange tube gianis33 Tubes / Valves 19 26th January 2009 12:23 AM
strange tube adalin Tubes / Valves 5 28th August 2007 09:52 PM
strange tube G1 S/5 Mr. Triatic Tubes / Valves 22 6th June 2006 10:42 AM
strange tube gianis Tubes / Valves 10 7th March 2005 10:42 PM
Strange Tube adalin Tubes / Valves 11 14th July 2004 07:30 AM

New To Site? Need Help?

All times are GMT. The time now is 08:55 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2