07-05-2022, 09:08 AM
Any thoughts as to why Radio mode is so dead?
Edited version of DE domestic version from NVHR. Very similar. Main differences are the 240V input position and extra winding for switched 100mA pilot lamp at volume control.
Electrotanya has the older EC92 version
I'll check the 4uF (+ to chassis of course) on EABC80 for FM, but total lack of any AM too is odd, esp with ECH81 and EF89 swapped. The EABC 80 triode is working and the AM diode doesn't usually fail.
All the AM and FM IFTs are in series, so if one winding anywhere is open circuit then no IF (except on final detector drive).
Edited version of DE domestic version from NVHR. Very similar. Main differences are the 240V input position and extra winding for switched 100mA pilot lamp at volume control.
Electrotanya has the older EC92 version
I'll check the 4uF (+ to chassis of course) on EABC80 for FM, but total lack of any AM too is odd, esp with ECH81 and EF89 swapped. The EABC 80 triode is working and the AM diode doesn't usually fail.
All the AM and FM IFTs are in series, so if one winding anywhere is open circuit then no IF (except on final detector drive).
