Reply
 
Thread Tools Display Modes
  #1   Report Post  
A F Four Kilo
 
Posts: n/a
Default FS: Jackson Type 648 Tube Tester

FOR SALE:
Jackson Dynamic Conductance Type Tube Tester - Model 648

Excellent condition with built-in roll chart.
Has almost all type of tube sockets and will test
a very broad variety of tubes. This is not just an
emission tester like most tube testers.

This is a full-feature transconductance type tester.
115V AC operation, with a good power cord.
Unit is in excellent working condition.
Will sell for $99.00 plus shipping.

E-mail:


and Remove that NOSPAM

http://s88932719.onlinehome.us/testgear.htm

  #2   Report Post  
Phread
 
Posts: n/a
Default

Jackson 648 is a good quality emission tester. It does not measure mutual conductance, aka transconductance. "Dynamic"
means they saved money on power supply filter caps and ran everything on unfiltered, full wave rectified AC.
"Conductance" without "Mutual" or "trans" ahead of it means "emission".

See Alan Douglas' "Tube Testers and Classic Electronic Test Gear", available at AES.

Phread

"A F Four Kilo" wrote in message ...
FOR SALE:
Jackson Dynamic Conductance Type Tube Tester - Model 648

Excellent condition with built-in roll chart.
Has almost all type of tube sockets and will test
a very broad variety of tubes. This is not just an
emission tester like most tube testers.

This is a full-feature transconductance type tester.
115V AC operation, with a good power cord.
Unit is in excellent working condition.
Will sell for $99.00 plus shipping.

E-mail:


and Remove that NOSPAM

http://s88932719.onlinehome.us/testgear.htm



Reply
Thread Tools
Display Modes

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FA: Eico 667 Tube Tester for Amps, Hi-Fi. tw General 0 March 5th 04 06:18 AM
FA: Eico 667 Tube Tester for Amps, Hi-Fi. tw Pro Audio 0 March 5th 04 06:18 AM
Tube settings on Hickok 752 tube tester John K Vacuum Tubes 1 January 2nd 04 03:26 AM
FA: AVO Mk4 Tube Tester Tasp Marketplace 0 October 24th 03 04:05 AM
B&K Dyna-Quik 500 tube tester manual RJK Vacuum Tubes 2 July 27th 03 12:02 PM


All times are GMT +1. The time now is 11:28 PM.

Powered by: vBulletin
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 AudioBanter.com.
The comments are property of their posters.
 

About Us

"It's about Audio and hi-fi"