Ferguson 372 AM/FM receiver 1956.
I'm repairing what is quite a rare radio set, at least I've never seen a Ferguson radio set like this one before.
Unlike most AM/FM sets the VHF tuner employs an ECF82 triode-pentode instead of the more usual ECC85 double-triode. The pentode RF amplifier valve should offer more gain than the grounded grid triode but the noise level might be higher. Also, the VHF tuner appears to be wired among all the other circuits and not inside a separate tuner box assembly. According to the service manual schedule A production receivers employed a PCF80 as the FM RF amplifier and mixer-oscillator.
As stands now there is no response from the RF circuits on AM and FM. An ECH81 frequency changer valve was tried yesterday but still no results.
Fault could be in the waveband switches.
DFWB.
|