January 2015 …
RA117E N0586 was given to me as a non-
I decided that this would be my New Year’s treat … get the ‘One Transistor’ Radio working. It was ‘stone deaf’ and only occasionally was it possible to receive the strongest of local MW signals. The logical approach was to strip it down to its individual modules and test each one in turn after refurbishment. That way, I would be sure to come across the illusive fault.
Unlike my plain-
The remaining carbon resistors and tubular capacitors were replaced with modern types
and the PSU smoothing pack was re-
Testing the PSU and audio circuitry is easy. The audio stages were working fine but a higher than expected voltage drop across the main smoothing choke, L80, indicated that something elsewhere was not right.
PSU/Audio compartment before and after