The frequency you want is 11.1 MHz above the bottom of the band segment you
wish to cover.  For example, for the 29.0 MHz range, you want 40.1 MHz.  I
have a few crystals plugged into my R4C which I bought at a hamfest for
unknown frequencies; they give you some coverage in places.  But the real
way to go is to get an FS4 frequency synthesizer, which gives you general
coverage reception on the R4 series receivers.  There are some spurious
responses with the synthesizer, and I had to have mine repaired once,
because they can tend to unlock and sweep all over the place.  In fact, my
unit is doing it again.  Sometime soon I'm going to have to convince my wife
that it's time I bought a new transceiver.  But first I'm supposed to clear
some junk out of this basement.

Lloyd Rasmussen, Kensington, Maryland
Home:  http://lras.home.sprynet.com
Work:  http://www.loc.gov/nls
 

> -----Original Message-----
> From: For blind ham radio operators [mailto:[log in to unmask]]
> On Behalf Of Howard Traxler
> Sent: Saturday, September 29, 2007 9:41 PM
> To: [log in to unmask]
> Subject: crystals for the drake r-4 series receiver
> 
> Does anyone know how to figure out what the crystal frequency should be to
> cover a particular band on the R-4 series receiver?  I found some cristals
> on ebay but I don't know what ones to bid on.  I would just like to
> complete
> the 10 meter band and 160 meters.  not interested in those new warc
> bands--or whatever they're called.
> 
> Thank you anybody.
> 
> 73, de, Howard, wa9ryf