"Henry Kolesnik" wrote in message
...
Colin
Good on yah mate..
Now to express it another way the winding ratio of the diode transformer
has to be such that when it reflects the diode and its load to the plate
of the last IF, the plate circuit will see the correct impedance for the
IF tube load. Transformers don't have impedance, only turns ratio to
reflect back whatever impedance they see in accordance with the turns
ratio.

Thats fine for untuned transformers, but surely in the case of these I.F.
transformers that consist of mutually coupled parallel tuned circuits, this
must be different?