[Boatanchors] Tube tester

[John Lawson]

On Sat, 7 May 2011, LARRY D GODEK wrote:

>
> I have uncovered a Weston 798 tube tester. It works although the adapters for testing some tubes are missing.  Otherwise its in excellent shape, not NIB of course.  Anyone know anything about it?  I have a pictue of it if anyone wants to see what it looks like.  Came with charts charts inside.  Original type written charts.
>
> I've never heard nor seen one of these before.  Wonder if they were popular or just a few made and if for non-ham use, who was their main market.


Here is a pdf of the manual and some charts:

http://bama.edebris.com/manuals/weston/798


Interesting dual-frequency "Proportional Mutual Conductance" scheme.


As a matter of curiosity, I have a Weston 686 10-B and a General Radio 
561D - plus a Tektronix 575 curve tracer to drive tube characteristic 
curves in real-time.  Cumbersome to set up, but useful if one needs to 
really know the details of what's going on between the OD of the cathode 
and the ID of the plate.


Cheers

John KB6SCO