" wrote in message
...
On Oct 8, 6:21 pm, "Richard Knoppow"
wrote:
Not exactly boatanchor but pretty old. I obtained a
Hickok 890A transistor tester recently. I can find nothing
whatever about it on the web. Does anyone have a handbook
or
know much about them? In particular I want to know what
sort
of battery was used. It has clips for five batteries,
three
are obviously for C cells but the other is evidently for a
high voltage battery of some sort. Its nearly the size of
a
size-D cell but its not. I can get some action from the
calibration adjustment from two 9V batteries in series. I
think the original must have been either a 12.5 or perhaps
22.5 volt cell. If anyone can help it would be greatly
appreciated. I have posted to the test equipment list but
my
posts don't seem to show up there.

--
Richard Knoppow
Los Angeles
WB6KBL


At one time, there were 9 volt batteries of about the "D"
cell size
and shape.

Paul

Thanks for the reply. It might be but I tried it with a
single 9V battery and it did not seem to be enough. Two
batteries in series allowed the cal adjustment to work but I
don't want to just put 18V on it without knowing what the
actual required voltage is. I found a manual at a pay-for
site but its nearly as much as I payed for the tester.

--
Richard Knoppow
Los Angeles
WB6KBL