[amsat-bb] Re: Downconverter drift

["Rich Dailey, KA8OKH" <okh.npi@xxxxxxx>]

>I have been very pleased with the frequency stability of my downconverter
after I soldered a 60C PTC thermistor to the L.O. crystal.  Drift is
negligible 5 minutes after I turn it on.

I wrapped my 3733 in two layers of tin foil (shiny side out),  and 
saw a marked improvement in stability after 30 minutes or so.  I also
mounted the downconveter *under* the c-band feed of the dish,  for
whatever that is worth.

tu de Rich


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Rich Dailey, KA8OKH - Phyllis Dailey, KB4NPI
mailto:okh.npi@gte.net
http://home1.gte.net/web22jfw/
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