Hi Lee, Below is the info I usually send out with 8.83 MHz SoftRock Lite kit orders. Component changes from the 40m SoftRock Lite schematic are listed.
73, Tony KB9YIG 8.817 MHz SoftRock Lite IF use (version 9/19/07) SoftRock operated in 1/3 sub-harmonic sampling mode. Reverse audio cable connection to board with tip going to R on board and ring going to T on board. C3 180pF C4 omit R6 22.1k L1 32T of #30 on a T25-2 core (3.5 uH) T1 8T of #30 on primary and 4T of #30 in each of the two secondary windings "bifilar" over the top of the primary on a T25-2 core (0.2 uH on primary) C21 100 pF C22 1500 pF Crystal X1 is 23.512 MHz with JP1 divider set for x8 to result in a 1/3 sub-harmonic center frequency of about 8.817 MHz. ----- Original Message ----- From: Lee To: [email protected] Sent: Monday, June 09, 2008 11:07 AM Subject: [softrock40] Softrock Lite IF Hi Tony, I have a softrock IF kit that I ordered from you awhile back. It was designed for a 455 IF. I have not assembled it yet and would like to know if you can tell me which parts I would have to change in order to use it on the 8.83 Mhz IF on the Kenwood 870. 73 WD4Lee
