Tube standoff ? - 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 February 2012, 11:04 AM   #1
diyAudio Member
 
Join Date: Feb 2012
Default Tube standoff ?

I am looking for a test accessory for measuring signals and voltages on various types of tubes. I haven't dealt with tube equipment for years but am wanting to get involved once again.

This device was made of an inert material (Bakelite?) which you would insert into the tube socket, then plug the tube into the device - on which there were exposed contacts around the base where the tube plugged in, each connected to one pin.

The device allowed you to have easy access for troubleshooting and you did not have to take the chassis apart to get to things. There were different sizes: octal and others for various types of tubes.

I've looked for these in various places but am usually met with the questioning look "Tubes?" . Thank you for any help you can give!
  Reply With Quote
Old 29th February 2012, 11:15 AM   #2
diyAudio Member
 
Rundmaus's Avatar
 
Join Date: Aug 2005
Hey there,

your description sounds like a socket saver:

Vacuum Tube Socket Saver, 8 Pin / Octal | Amplified Parts

But most of them do not seem to have accessible contacts for testing purposes, maybe a drill will help with this

Greetings,
Andreas
  Reply With Quote
Old 29th February 2012, 11:25 AM   #3
diyAudio Member
 
Join Date: Feb 2012
Thank you Andreas - that is close to what I'm looking for but not quite.

Along the top of the adapter where the tube would plug in was a set of metal contacts, each being numbered for the corresponding pin of the tube. This made it quite easy to check signals and/or voltages.

It has been quite a long time since I worked on tube equipment (from USAF back in the 60's) but I now find myself with quite a bit of glass-bottle equipment - from audio amps to Hammond B3 and B4's. Just hate to see those quality pieces go to waste.

Thank you again!
KenC
  Reply With Quote
Old 29th February 2012, 11:25 AM   #4
diyAudio Member
 
bayermar's Avatar
 
Join Date: Oct 2007
Location: Tuebingen
There are commercial bias meters that use such sockets.
Maybe you can find one cheap on ePay and salvage the sockets from there.

See example here:
Weber Bias Rite cathode current monitor

(I do not have any affiliation with the company).

Cheers,
Martin
  Reply With Quote
Old 29th February 2012, 02:49 PM   #5
speaker is offline speaker  United States
diyAudio Member
 
speaker's Avatar
 
Join Date: Mar 2004
Location: USA
Pomona & Vector made them as well as a few others. Search eBay for "Vector Tube Socket Test Adapter Set T-789" or "Vector T12C" and you should find them, hint hint......
  Reply With Quote
Old 29th February 2012, 03:28 PM   #6
tgreese is offline tgreese  United States
diyAudio Member
 
tgreese's Avatar
 
Join Date: Feb 2012
Pretty easy to make one with a tube base, a socket and some stiff bare copper wire. Clipping on with mini-clip test leads is straightforward. SF-207A-R: JAMECO BENCHPRO: Test, Tools & Supplies
  Reply With Quote
Old 29th February 2012, 04:10 PM   #7
diyAudio Member
 
tubelab.com's Avatar
 
Join Date: Jul 2005
Location: South Florida
Quote:
This device was made of an inert material (Bakelite?) which you would insert into the tube socket, then plug the tube into the device - on which there were exposed contacts around the base where the tube plugged in, each connected to one pin.
These things used to be pretty common items in TV and radio repair shops in the 1960's. I used to have a set myself back then. Unfortunately I haven't seen my set since the 70's. They do show up every once in a while at hamfests, but I don't remember seeing one recently. I think they were called test adaptors.
__________________
Too much power is almost enough! Turn it up till it explodes - then back up just a little.
  Reply With Quote
Old 29th February 2012, 04:29 PM   #8
diyAudio Member
 
Michael Koster's Avatar
 
Join Date: Jan 2008
Location: Eureka, CA
Found these on ebay:

72 BRIMAR BVA Valve Röhre England EL506 NOS NIB Tube with Socket Guarantee Test | eBay
  Reply With Quote
Old 29th February 2012, 04:39 PM   #9
diyAudio Member
 
HollowState's Avatar
 
Join Date: Aug 2006
Location: Taxland, New Jersey
You just missed a set of Pomonas on feeBay last week. $22.50
Attached Images
File Type: jpg 2974327868B34B69899AD75731287C81.jpg (200.5 KB, 129 views)
__________________
"It is hard to imagine a more stupid or more dangerous way of making decisions than by putting those decisions in the hands of people who pay no price for being wrong." ~Thomas Sowell
  Reply With Quote
Old 29th February 2012, 08:33 PM   #10
diyAudio Member
 
Join Date: Feb 2012
Thank you HollowState and Speaker - those are exactly what I was attempting to describe. Now all I have to do is locate a set.

Now the question - what is the current method of troubleshooting valve circuits? Swapping out expensive tubes only gets you so much information (and you never know the quality of the tube you are inserting) and taking apart an entire chassis to gain access to live pin connections sounds time consuming and exposes you to too many problem areas.

Think of trying to trace a signal in an 50's electronic organ with it's 50-60 tubes! You can spend literal hours just getting to things. Just not an efficient use of time.

Thank you again to everyone - this is a great welcome to the website!
  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
need diy tube preamp (line-stage) recommendation and general tube advice Musiclover4 Tubes / Valves 16 18th May 2013 03:19 PM
Telefunken Tube Receiver, Magnetophon 97 (Tube R2R) and Record Player Dredfred Swap Meet 1 3rd April 2011 01:12 AM
FS tube tuner, Active filter kit, tube amp, amp3 Josephjcole Swap Meet 9 20th July 2007 04:05 PM
SS or tube voltage amplifying stages in an amp with tube output? ray_moth Tubes / Valves 14 4th July 2007 03:09 AM
How to Remove Standoff eris Chip Amps 9 25th February 2007 03:10 PM


New To Site? Need Help?

All times are GMT. The time now is 05:07 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