02-26-2014, 12:14 PM
The IF tuning seems quite a bit off. You could use your transmitter and gradually adjust the IF trimmers so that the LO freq is 260 kHz higher than the RF input freq. You can peak using the AVC output as a carrier level indicator, measuring with a DVM across the detector output to ground.
It is possible that the IF alignment may have some effect on the LO operation, as the plate circuit of the 36 is tuned both by the IF tranformer primary and the osc coil. I would get the IF tuned to 260 kHz before anything else.
As I recall, you had to rewind the osc coil, so any deviation as to the way the coil was wound and connected to the terminals may be significant.
It is possible that the IF alignment may have some effect on the LO operation, as the plate circuit of the 36 is tuned both by the IF tranformer primary and the osc coil. I would get the IF tuned to 260 kHz before anything else.
As I recall, you had to rewind the osc coil, so any deviation as to the way the coil was wound and connected to the terminals may be significant.
