Bruce Beford

开云体育

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@... 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

Tony Parks

#174

开云体育

Hi 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

Show quoted text

----- Original Message -----

From: Bruce Beford

To: qrp-l@... ; QRP-Z@... ; softrock40@... ; 'Alex' ; 'Bill Tracey' ; 'Stan Rife' ; 'Steve Miller' ; 'Jim Giammanco' ; 'Chuck Carpenter' ; 'KD5NWA' ; w9ya@... ; '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@... 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

Bruce Beford

#176

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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