help ID 4-500 old stock tubes - 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 25th September 2010, 06:33 PM   #1
diyAudio Member
Join Date: Mar 2004
Location: southern ont
Default help ID 4-500 old stock tubes

Hi: A neighbour was cleaning out his deceased Father in law's house. The old boy kept all his stuff from when (I guess) he was a TV and electronics repairman in the tube days. He asked if I could sort through the 5 boxes of tubes, sockets, and books in exchange I get to keep enough stock to build my own amp. Being only familiar with bjt and chip projects, I need some help with what is actually worth keeping. There is about 4-500 tubes , new in boxes. In one of the books (from GE) it lists essential characteristics of most tubes that I have in front of me. Is it safe to say that all listed for service in class A amplifier are the ones I should keep?
  Reply With Quote
Old 25th September 2010, 06:41 PM   #2
diyAudio Member
Join Date: Mar 2010
It's more complicated than that. Stuff the whole collection into a closet after making a list. Then let us know what you have and you can either use them or sell them or give them away. I would never suggest throwing any in the trash unless it's clear that they have no possible use.
  Reply With Quote
Old 25th September 2010, 07:44 PM   #3
taj is offline taj  Canada
diyAudio Member
taj's Avatar
Join Date: Feb 2005
Hey squarehdca,

I just went through this recently. Bob is right, make a list. It's the only way, until you familiarize yourself with tube amplifiers. There are a fair bunch of commonly used audio tubes, but there are even more that are probably only useful in old tube TV's, which aren't of much interest.

Start looking at tube amp schematics and take note of the tubes being used. There are hundreds (possibly thousands) of amp schematics on the internet. Make a list of all the tubes you see in those schematics. Those are the ones you want to keep.

The rest will end up in the list you post here, so people can point out some of the less common, but still useful audio tubes. There are a few types of TV tubes that work well for amps.

A couple tips: Separate the new (NOS) ones from the obviously used ones. Be careful with the flaps on the tube boxes, they tear off easily. Be VERY careful if you clean dirty tubes, the label paint wipes off REALLY easily. If you come across any tubes with inside of the glass covered with white residue, throw them out, they're dead. Try to find someone who can test the audio tubes you end up with.


Last edited by taj; 25th September 2010 at 08:00 PM.
  Reply With Quote
Old 25th September 2010, 08:26 PM   #4
diyAudio Member
Join Date: Mar 2004
Location: southern ont
Thanks , making a huge list now.
  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
B&K Dyna-Quik 500 shows good tubes as Shorted BmWr75 Tubes / Valves 19 11th July 2013 09:04 PM
WTB: Stock or near stock ART DI/O buzzinghive Swap Meet 0 16th March 2007 09:06 AM
help on id of tubes woodturner-fran Tubes / Valves 8 14th March 2006 09:17 PM
New stock pre -amp tubes. Whats good? RockysDad Tubes / Valves 7 3rd March 2006 09:46 PM
FS: JL 500/1 ($500 CAD located in GVA) Dynamix Lude Swap Meet 0 27th October 2004 03:21 AM

New To Site? Need Help?

All times are GMT. The time now is 08:18 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