Re: Aerial blocking circuit for TRFs anybody any ideas
I'd suggest a parallel-resonant circuit in the antenna-lead.
You can achieve this using the ferrite-rod/coil and tuning-capacitor from a scrap transistor-radio.
[Something similar was commonly fitted in 1940s/1950s radios, but resonant at the radio's intermediate frequency, to stop interference from aviation navigation-beacons operating in the 300-500KHz range]
|