dr pepper
Advanced Member level 1
I have an old tube fm receiver I'm doing some work on.
I get talk sport alll over the dial, and it gets louder where local stations are.
At first I thought the IF strip was goosed, but looking up frequencies for talk sport they only transmit on AM.
It picks up FM stations and they are just audible in the background, but talksport is loud.
I could imagine a harmonic getting through the front end, but the discriminator wouldnt detect it.
Shorting the Am aerial and oscillator coil doesnt change anything, so its not the Am side bleeding over.
N.B. the transmitter is 40 miles away, however its a powerful one at 500kw.
I get talk sport alll over the dial, and it gets louder where local stations are.
At first I thought the IF strip was goosed, but looking up frequencies for talk sport they only transmit on AM.
It picks up FM stations and they are just audible in the background, but talksport is loud.
I could imagine a harmonic getting through the front end, but the discriminator wouldnt detect it.
Shorting the Am aerial and oscillator coil doesnt change anything, so its not the Am side bleeding over.
N.B. the transmitter is 40 miles away, however its a powerful one at 500kw.
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