I found those 4.224 Crystal oscillators (ex equipment) on eBay .
Divide 4224 by 32 (first 8 and then make the quadrature signals), and the LO frequency ends up on 132 kHz. Not bad for a 136 kHz SDR.
Donnie WA9TGT's Direct Conversion Receivers
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*Donnie WA9TGT writes: *
*I recently built my first basic 40 meter (DC receiver)
from http://www.qrpkits.com/ that uses the common SA602 & LM386 chip c...
15 hours ago
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