[Boatanchors] Tube tester

[Mahlon Haunschild]

The Weston 798 is a very good mutual conductance tester.  Heathkit
thought enough of it to copy the circuit in their one-and-only
mutual conductance tester, the TT-1.

regards,

Mahlon - K4OQ
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 7 May 2011 12:24:07 -0400 (EDT)
> From: John Lawson<jpl15 at panix.com>
> Subject: Re: [Boatanchors] Tube tester
> To: LARRY D GODEK<telegrapher at q.com>
> Cc: boatanchors at mailman.qth.net
> Message-ID:<Pine.NEB.4.64.1105071217110.13191 at panix2.panix.com>
> Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
>
>
>
> 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