Question about Hickok 539C - diyAudio
Go Back   Home > Forums > Design & Build > Equipment & Tools
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Equipment & Tools From test equipment to hand tools

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 19th September 2010, 02:04 AM   #1
diyAudio Member
Join Date: Mar 2010
Default Question about Hickok 539C

I am using a 539C to test a bunch of tubes. With every tube I test, the Gm reading will stay solid but the plate current will slowly bounce between 2 values - usually within 4 mA of each other. For instance, I was just testing a 2A3 and the plate current would slowly bounce between 24.2mA and 27.8mA. I am letting the tubes warm up and the tester was recently calibrated.
  Reply With Quote
Old 25th February 2014, 05:46 PM   #2
diyAudio Member
Join Date: Apr 2008
Hello maxseeley,

The 2A3, despite being listed, may be a difficult tube to test due to direct heating interfering with signal grid current, both being 50/60Hz : this can be an explanation.

  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
Anyone Have a Hickok 800A skidave Equipment & Tools 7 22nd April 2015 07:21 AM
settings for 300b tubes on 539c tester TubeHound Parts 2 25th February 2014 05:58 PM
Looking to "Borrow" an Amplitrex, 539C or other High-End Tube Tester in SE PA Area baileyler Swap Meet 0 14th January 2009 02:07 PM
Hickok Upgrades Zero Cool Equipment & Tools 0 22nd June 2008 11:36 PM
Hickok 533A help cwujek Equipment & Tools 4 20th July 2007 12:09 PM

New To Site? Need Help?

All times are GMT. The time now is 07:19 PM.

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