I am curious about this precision 910 tester. I have a 612 which is not
unlike this, but it has 10 lever switches to select the connections of the
10 tube terminals. On this photo of the 910 there is just a row of buttons.
Anyone know how the three choices [common, 'plate' and filament] of element
connection are selected in this model??
Thanks

Neil S.

"PeterD" wrote in message
...
On Sun, 06 Jan 2008 20:58:03 GMT, John
wrote:

Here is a photo. Works great, still need to clean it up a little. Thanks,
John

Man, blast from the past, I had one of those when I was younger. Great
tester, I loved it. Sadly I have no idea what happened to it, but it
was great.

On Mon, 07 Jan 2008 16:53:05 GMT, "Neil S"
wrote:

I am curious about this precision 910 tester. I have a 612 which is not
unlike this, but it has 10 lever switches to select the connections of the
10 tube terminals. On this photo of the 910 there is just a row of buttons.
Anyone know how the three choices [common, 'plate' and filament] of element
connection are selected in this model??
Thanks

Neil S.


Way too long ago for me, but I remember punching those buttons a lot.
bg I think the grid, filament plate are all controlled by the rotary
switches, iirc.

I am curious about this precision 910 tester. I have a 612 which is not
unlike this, but it has 10 lever switches to select the connections of the
10 tube terminals.

Similar to my 10-12?

Phil Nelson

Uhh, I was, of course, referring to the 912 in the photo, not a 910.
The 612 is a bit like your 10-12 and the 912 in general layout but it has 3
rotary controls to select test voltage/current, filament voltage and meter
shunt and then a bank of 10 lever switches [one for each tube pin] that
connect the pin to common or 'test' or open or filament supply. The levers
are flicked from common [the rest postion] to test one at a time to check
for shorts and then all active elements except cathode are set to test and
the 'test' button pressed for measuring emission.
On the 912 it is not obvious how the tube terminals are connected to the
appropriate test circuits in the tester.
Your 10-12 is pretty obvious how it is done with the added convenience of
push buttong shorts test.

Neil

"Phil Nelson" wrote in message
...
I am curious about this precision 910 tester. I have a 612 which is not
unlike this, but it has 10 lever switches to select the connections of the
10 tube terminals.

Similar to my 10-12?

Phil Nelson