Depends on how you do it.
Allard's code simply moves the VFO from 5mhz to 19mhz, which flips between usb and lsb.
No hardware mods required, other than to remove C91,C92 to keep them from sucking away too much of the 19mhz VFO.
C91 and C92 are only needed if you are using the old analog VFO, not for the Raduino.
Alternately you can leave the VFO at 5mhz (that way the sharper edge of the crystal filter is nearest the bfo)
and somehow move the bfo down in freq by about 3khz.
You could drive the bfo from CLK0 of the si5351 on the Raduino as per the ubits, not switch required
to go between usb and lsb. ?Requires a change to the raduino code and coax from Raduino to bfo.
Or you could whack at the analog bfo with coils and caps to move it around.
Your choice.
Jerry, KE7ER
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On Fri, Jul 28, 2017 at 06:28 pm, Mr Sheesh wrote:
If you want switchable USB/LSB I had thought you'd want to jumper across L5 (which comes jumpered in the v3) or instead have a few uH in there, but how many uH isn't clear yet.
?
