15-08-2015, 02:41 PM
(15-08-2015, 01:26 PM)pwdrive Wrote: With reference to the Pye 65A service sheet what does "Aperiodically tuned aerial coupling coils" mean? I've seen the term aperiodic used many times in reference to radios etc but never really looked into what it means, anyone know?
Aperiodic means 'untuned', Lawrence, in this case only referring to the aerial coupling coils - the main windings are tuned.
However, a better insight might be provided by an extract from the Trader sheet for the Mullard MAS221:
"For SW operation ... the tuning capacitor C34 is disconnected due the opening of S5, so that the input circuit is aperiodic."
