Re: BITX40 with QRPLabs VFO
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Thanks for the great info, Hans!? Firmware is s1.02c.? The other piece that I'm sure I saw before, ?but I can't seem to find now. ? What are the pin connections between the BITX40 and the VFO module? I know I'm supposed to connect Clk0 and Ground on the VFO, just need to figure out which is which on the BITX.
Kent W9WB
On Dec 31, 2016 12:49 AM, "Hans Summers hans.summers@... [BITX20]" < BITX20@...> wrote:
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Hi Kent
First check your firmware version, it is displayed at startup. For use with the BITX40 you need version s1.02a or above.?
Set the IF offset parameter to -012,000,000
Later you may refine that to the exact BFO frequency, if you can measure or infer it.
If you use the GPS and set the GPS Mode Baud parameter to 2 009,600 (which i suppose you did already) then the reference frequency is automatically calibrated.?
Otherwise (with no GPS) the Ref Freq parameter also needs to be set to the exact reference crystal frequency. If you set it to 27,004,000 the VFO will be within a couple of hundred Hz and you can improve on that later.
Please let me know if any other questions!
73 Hans G0UPL? ?
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