Re: question about crystal spacing in filter

Heinz Schnait <oe5eep@...>
 

Hi,

Have a look at messages 124 and 131.

I found a set of 4 crystals within 30 Hz and they are doing fine for
SSB. I have posted a plot of the resulting filter passband in the
files section. Look for BITX20_10MHz_crystalfiler_2.sxc.pdf

73 Heinz, OE5EEP

--- In BITX20@..., "eternalesquire" <eternalsquire@c...>
wrote:
Hi,

I never saw anything about the original article about this. I've used
the BFO and a frequency counter to measure all my crystals. How
closely do they need to be matched for SSB reception? for CW reception?
P.S. I am using 10.7 Mhz as the IF

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