K2 Softrock IF - solved

[STEPHEN BUNTING]

Hi Folks,

Thanks for all the replies. Mr Soft Rock, Tony Parks, kindly emailed me
all the details through. I will post them here so that people searching
the archive can find them in the future:

The K2 specific components are listed below:

4.915 MHz SoftRock Lite II for K2 IF application

Then SoftRock Lite II operates with crystal frequency divided by 4.  The
Lite II center frequency will be about 4.919 MHz and when used with a
soundcard that can sample at 48 kHz will give IF band coverage from
4.895 MHz to 4.944 MHz.

C10 100pF
C11 not used

L1 43T of #30 on a T25-2 core (6.4uH)
T1 12T of #30 on primary and 6T of #30 on each of two secondary windings
bifilar over the top of the primary on a T25-2 core. (0.5uH on primary).

C3 180pF
C4 2200pF

Crystal X1 is 19.68 MHz SMT type with crystal between pins 1 and 3.

73
Steve
M0BPQ
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[DaveL G3TJP]

I'm sorry to advise that the component identifiers in Tony Parkes' response
don't tally with the identifiers on the 6.2 Softrock Lite circuit diagram
for components that are band specific.  It seems some wires are crossed

 

I've emailed Tony, seeking clarification, and will post the outcome on here.

 

73  DaveL  G3TJP

 

 

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html