Hi Mike,
You may wish to consider a different IF for which rocks are more
readily available (as I was typing this, I saw Steve J's reply
pointing out yet another reason for considering a different IF). For
instance, there are tons of chroma subcarrier crystals for NTSC and PAL. I see
these going for $0.20 in quantities of 10 from Digikey, making
it easy to buy a bag from which to find a good set of matched
ones. A higher IF would also give you improved
image rejection as an additional benefit. Would that be an option at
all for you?
--Tom
--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
420 Via Palou Mall
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu
On 6/18/2024 11:43 AM, Mike Kana wrote:
Hi all
This is for a crystal filter. The RX designs I’m looking at are th HBR Rx or the 6-4 from the 1964 hand book
If the xtal isn’t exactly 1700, a few KC either side would require some VFO trickery.
Thx
Mike
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