It would only let me see 6.5 KHz on one side.
I'm going to try putting two crystals in parallel, and try to pull them so I can get at least 10 KHz on either side of the IF, the crystals are cheap enough. I'll get the ones that are close to the center of the IF and pull them down. I'll also buy one that is 68.8KHz lower than the 4X IF frequency, just in case.
At 01:58 PM 9/28/2005, Tony Parks wrote:
Cecil,
The crystal that is 17 kHz low would work well if you are meaning the
crystal is 68 kHz low at its fundamental frequency. Seventeen kHz low even
at its fundamental frequency would still probably be ok.
----- Original Message -----
From: "KD5NWA" <KD5NWA@...>
To: <k4oah@...>
Cc: <softrock40@...>
Sent: Wednesday, September 28, 2005 1:51 PM
Subject: [softrock40] Re: [QRP-L] (no subject)
We are in the process of backing up and punting instead. I've been
advised to move the crystal frequency of SR-40 by 12KHz on the low or
on the high side, to get away from some of the noise in the center of
the receivers band.
Not an easy job due to lack of crystals at those high frequencies, I
found one 17 KHz low, too low for my taste. I'll be checking for
something closer later when I get a break.
Any guesses as to how low could I pull a 35.328 MHz crystal? 48KHz lower?
I kept the names of the interested parties, and will keep you posted.
Cecil Bayona
KD5NWA
www.qrpradio.com
'Never argue with an idiot. They drag you down to their level then beat you with experience.'
