Tube ID & Code Help Needed - 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 8th January 2007, 03:24 PM   #1
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
Question Tube ID & Code Help Needed

I aquired an old 60's Lowery organ over the weekend.

Long story short,

I got a quad of 7591's out of it, But I have never seen this particular brand.

The date codes on the 12AX7's are RCA style year/week (65-17)

But The 7591's use a code I am not familar with, Possible Sylvania? I would Like to date these.

See pictures

I have never heard of CMI tubes , perhaps re-labels. They say made it usa.

CMI 7591

CMI 7591 Top View

Thanks
Trout
  Reply With Quote
Old 8th January 2007, 04:31 PM   #2
Trout is offline Trout  United States
diyAudio Member
 
Trout's Avatar
 
Join Date: Nov 2004
Location: Midwest Madman
OK, I think I found at least part of the info.
337 Is the manufacture " Westinghouse"

So I assume the lower numbers are date?

526?, I know for sure the unit was from the 60's
Trout
  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
Problem witht [code]blah[/code] ? elseif Forum Problems 1 17th August 2008 12:30 AM
Tube info needed Marik Tubes / Valves 0 13th February 2008 06:11 AM
Tube phono pre-amp needed. Runco990 Tubes / Valves 28 23rd March 2007 03:20 AM
help needed 1st tube diy gelder Tubes / Valves 4 27th November 2005 05:21 AM
Help needed on tube rectification. w00t Tubes / Valves 10 10th March 2004 02:14 PM


New To Site? Need Help?

All times are GMT. The time now is 01:01 PM.


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