>Carrier frequency: 60 Khz
>Modulation frequency: 1 - 10 Hz (square wave)
>Type modulation: Amplitude shift keying (10 db RF change)
>RF level: low (1 - 10 microvolts)
>Receiver design: TRF (solid state)
Hi Stan,
Well, it looks to me that you want to build a WWWV receiver.
I think what I would do is start with a tuned ferrite rod antenna. Than a
20 dB gain low noise tuned amp. That would feed a FM IF chip such as the
CA3089. The output of the FM limiter stages would give you the 60Khz square
wave. The RSSI signal strength output most likely could be used for
detecting the amplitude shift using some op amps.
It would cost more than 2 bucks, but should be less than 10, even with all
new parts.
Darn, now I'm gonna have to build one and see if it works...
72,
Steve, KD1JV....In the White Mountains of New Hampshire
"Melt Solder"
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