Yes, Tony. You may still order crystals. I am posting here, because
I don't have you direct email address. 73, Bruce.
--- In softrock40@..., "Tony Parks" <raparks@c...> wrote:
MessageHi Bruce,
Very good!! I would like two of the crystals. Please let me know
if I am in time and I will send the payment via Paypal.
Thanks,
Tony KB9YIG
----- Original Message -----
From: Bruce Beford
To: qrp-l@m... ; QRP-Z@f... ;
softrock40@... ; 'Alex' ; 'Bill Tracey' ; 'Stan
Rife' ; 'Steve Miller' ; 'Jim Giammanco' ; 'Chuck
Carpenter' ; 'KD5NWA' ; w9ya@a... ; 'Don' ; 'david feldman' ; 'Curt
Knight' ; 'Brian B. Riley (N1BQ)' ; 'Pete Barth' ; 'Don Johnson,
KD8UA'
Sent: Saturday, September 24, 2005 5:56 PM
Subject: [softrock40] SoftRock40 on 30M- Success! Crystals
available now.
Hello all.
I have successfully converted a SoftRock40 for use on 30M. Two
capacitors need to be changed from their original values, and a new
oscillator crystal installed. Capacitors C6 and C7 are changed from
their original 100pF to 33pF. The crystal is changed from its
original 28.224 to 40.500 Mhz. The original crystal still works with
the new capacitor values (in two units here). (I had tried this
before, and didn't think it worked, but my experiment was flawed. It
is working now.)
By using a machined-pin socket (or similar) for the crystal,
band change is as easy as swapping the crystal. A switch could also
be wired in to select different crystals. The receiver input band
pass filter is wide enough to allow good operation on 30M. When
using the PowerSDR software, just go to Setup, and select the
SoftRock tab. Uncheck "Fixed HW Osc" and enter 10.125 in the Freq
box. Then, recheck the "Fixed HW Osc" box. That's it. PowerSDR will
now display the correct frequencies. Please note that these crystals
are fundamental mode, HC-49 size crystals, 100 ppm. The actual
center freq on 30M will be +/- 1Khz or so. A slight tweaking of the
image reject settings may be needed for best performance when
changing bands.
I have available a quantity of the 40.500 Mhz crystals required.
These allow nearly full coverage of the Amateur 30M band with the
SoftRock receiver. As I announced earlier, I am making these
available to all. The price for US delivery is $2.00 for one
crystal, $1.50 each for quantities of two or more. For foreign
addresses (including Canada) the price is $2.50 for one, $2.00 each
for two and up. You may send payment via PayPal to bruce.beford@v...
I will fill orders on a first-come, first served basis.
Any questions? Email me direct, and I'll answer as best I can.
73,
Bruce N1RX
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