[Boatanchors] tube tester readings

[J. Forster]

Not SPECIFICALLY about your unit, but about Transconductance in general:

==========

Transcoinductance is:

Change in Plate Current / Change in Grid Voltage

The units of measure are reciprocal Ohms (1/Ohms) also called Mhos

If the Plate Current is in mA and the Grid Voltage in Volts the numbers
are inconvenient so uM is used (MicroMhos)

Example: If Ip change = 5 mA ; for a Vg change of 1 V:

Ch. Ip / Ch. Vg = 0.005/1 Mhos or 5000 uMhos.

If you look at your meter multiplier, there is likely x100 position, so
5000 uM would read 50 on your scale of 0 to 120.

Best,
-John

===================

> Ok, this may seem like a duh to some, but on my B&K Dyna-jet tube
> tester, the meter is scaled numerically from 1-120 but I have no idea
> what the reference quantity means. The REPLACE-REJECT-GOOD markings
> are not too much for my small brain. I know this is a mutual
> conductance tester and I know what that means but have no idea how
> this scale translates to that.
>
> Another unknown is regarding dual section tubes. The chart shows a
> test 1 and test 2 but no reference in the manual as to which section
> of the tube is which.
>
> Please enlighten me.
>
> Thanks and 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!