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