There is some information about these in the ARRL Handbooks - at least the older ones. Sweep alignments seem like they should be easier now than they were 30 or 40 years ago for most of us.
73,
Bill KU8H
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On 11/29/2017 11:44 AM, Glen Leinweber wrote:
Gang,
With all the crystal matching going on, I can imagine lineups of many crystals: one end being "low", the other end being "high" in frequency.
The middle group will be missing, and found buried in working radio I.F. filters of the ubiquitous ladder type.
Well, an outlier crystal might be useful for a BFO oscillator.
Another possible use for those outliers is lattice filters, a type sadly neglected by the homebrew community. These filters require crystals that have series resonant frequencies that have kilohertz offsets, rather than all being the same.
Yes, they're more complex than ladder types, but I'm wondering if some of those outliers might be mated up and employed in useful work?
--
bark less - wag more
