I found a nice crystal frequency on eBay : 10.6875 MHz
Yes, 10700 - 12.5 kHz.
Combined with a 15 kHz wide 10.7 MHz FM filter and a direct conversion receiver this should make a 10.7 MHz spectrum scope with 15 kHz bandwidth, so :
10.7MHz signal from R7000 or similar receiver -->
possibly a preamplifier, in any case some termination for the filter -->
10.7MHz FM filter for 25kHz channel spacing (BW = 15 kHz) and 2nd termination -->
DC-mixer with oscillator frequency of 10687.5 kHz (possibly pulled up to 10690 kHz) -->
AF amplifier -->
output to PC running spectrumLab
Looks like yet another 'little' project.
should be good for looking at satellite transponders with (not too wideband) digital signals, and some Doppler tracking at the lower satellite frequencies.
Wes W4JYK's FB SolderSmoke Direct Conversion Receiver by a Vienna Wireless
Society Makers Group Member
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*I was very glad to see Wes W4JYK finish this reciever. Wes is a member of
our local radio club -- the Vienna Wireless Society, and is part of the
club's...
23 hours ago
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