12SX7 coin base tubes? Fake? - 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 7th February 2012, 04:02 PM   #1
dgta is offline dgta  United States
diyAudio Member
 
Join Date: May 2011
Default 12SX7 coin base tubes? Fake?

I just saw some tubes labelled JAN12SX7 that are coin base with green silkscreening, nothing etched in the glass. Are they fake? I've never seen a coin base 12SX7. Supposedly GE from the 1970s. Has anyone seen anything like that?
  Reply With Quote
Old 7th February 2012, 04:43 PM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
How about some pictures?
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 7th February 2012, 04:53 PM   #3
diyAudio Member
 
the_manta's Avatar
 
Join Date: Nov 2006
Location: Munich, Bavaria
There are some very rare coin base variations of tubes. I don't think anyone would fake a standard 12SX7. Just some rare late production.
There are more coin base types of tubes as you would think. Just look here. For years now I tried to get just one of them but never ever had the luck to get one.
__________________
Терпенье и труд все перетрут
  Reply With Quote
Old 7th February 2012, 04:55 PM   #4
dgta is offline dgta  United States
diyAudio Member
 
Join Date: May 2011
Sorry Kevin, no pics. I'll get some next time I see him.
  Reply With Quote
Old 7th February 2012, 05:11 PM   #5
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Cool, that will help. They could be real or fake, although I am not aware of anyone currently building tubes on coin bases, but that does not make it so.. I suspect they are probably just very late production.

Coin base Sylvanias and GE/RCA types are quite common around here, and are generally very very late production articles - for this reason they are often avoided by the cognoscenti because the allegation was that production quality was starting to lapse. Sort of marks a line in the sand for late North American tube production. Most, not all of the 6EM7 I have on hand are coin base, but for me that is about it, and they have all worked fine.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 7th February 2012, 05:16 PM   #6
dgta is offline dgta  United States
diyAudio Member
 
Join Date: May 2011
I wasn't necessarily thinking "fake" as in recently manufactured. I was thinking along the lines of someone taking old Russian tubes and silkscreening new and wonderful labels on them
  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
12SX7 gianis Tubes / Valves 11 30th September 2012 05:43 PM
fake 1 coin DF96 The Lounge 33 17th July 2011 07:05 PM
6SN7 coin base tubes Original Burnedfingers Tubes / Valves 3 18th May 2008 01:00 AM
Wanted to buy 5691 red base tubes Original Burnedfingers Swap Meet 0 6th March 2008 12:07 PM
Anyone remember the coin tweak? JCoffey Multi-Way 32 17th December 2003 08:37 PM


New To Site? Need Help?

All times are GMT. The time now is 04:49 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