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Re: AM Stereo? May still get a boast. More links!!!

May 11, 2015 06:28PM
I recently got the Meduci AM stereo detector card, haven't tried it yet, but I'd like to make some kind of super duper AM tuner with it. Even without stereo, I want to hear the low distortion of the sync detector on that card. I wanted it to replace the stereo AM detector in an MCS tuner I have, but I don't like the bandwidth in that tuner very much.

I'd have to get some wide ceramic filters, or try some ideas I've been thinking of, like a bandpass style IF strip rather than peak tuned, and bandwidth depending on signal strength, strong = wide.

That could be done by adding positive feedback to the IF strip, so when the AVC brings up the gain on small signals, the increased feedback increases the Q-factor of the IF, narrowing the bandwidth, plus increasing gain some too. I thought of that when reading about the Q multipliers that SWLs and hams used in the 1950s to narrow reception and improve signals.

Boast to the head!

Boomer
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AM Stereo? May still get a boast. The Pages are still up!

ThaDood 570 May 11, 2015 08:33AM

Re: AM Stereo? May still get a boast. More links!!!

ThaDood 344 May 11, 2015 02:37PM

Re: AM Stereo? May still get a boast. More links!!!

Radio Animal 348 May 11, 2015 06:28PM

Re: AM Stereo? May still get a boast. The Pages are still up!

jtart 311 May 11, 2015 02:47PM

Re: AM Stereo? May still get a boast. The Pages are still up!

Radio Animal 397 May 11, 2015 06:50PM

Re: AM Stereo? May still get a boast. The Pages are still up!

Lee 352 May 19, 2015 12:00PM



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