Hallo Alan,
Thank you very much for your nice work!
What for me -of course- further an important subject is; to find some schema (or in optimale case a manual?) too, but I think it will not be very real?
Internally it has 14 tubes, overall is very clean, but somebode befor me has forget lot of the srews to drive back
_OK it was (maybe) over years staying in a laboratory cupboard.
The output signal has too much amplituden differences between bands & vs tuning....
The modulation seems to be not perfect too, I will it check exacter in the next time.
Can you tell me pls how big was these vendor, & is it still existing?
With best wishes!
Karl