Re: Ferrite rod antenna and RF amp for Valve radios
Yes, a resistor might seem crude, but the only alternative would be to apply negative feedback to the rod, and that starts to get a bit involved. Try about 75 ohms in series with the MF coil to start with.
BTW, I recall reading somewhere that if the LW coil of a MW/LW rod is left open circuit when MW is operating, it's possible for the LW coil to interact as it heads towards self-resonance.
John
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