"WayneJ" wrote in message
newsp.vtkzcetenatzq9@dellilah...
On Thu, 07 Apr 2011 06:09:51 -0700,
wrote:

I was wondering if anyone out there has any additional information
with respect to the dynamic mutual transconductance circuitry of the
above mentioned tube tester? For instance, there are three coils in
this circuit that must have a certain number of turns and turns
ratios. This would also allude to using a certain wire gauge.

The information I have found on places like BAMA only discusses the
theory of this design and do not specifically address this unit's
intimate repair. Any help here would be useful whereas this
information seems rather illusive. Thanks in advance.

Fabe
CBS, Newfoundland



I believe the Stark 9-66 is based on the Hickok tube tester circuit,
either licensed from Hickok or possibly built for Stark by Hickok.
While the circuit may not be completely identical, repair info for
Hickok designs from the 40's and 50's is more readily available and
should be of great assistance.

WayneJ


It not only appears to be built by Hickok, it is identical to the Hickok
533(A)
- even down to an identical drawing number (677W). Even the manual is
the
same with the Stark name substituted for Hickok.

73, Dr. Barry L. Ornitz WA4VZQ