HR-1680

[Mark Graalman WB8JKR]

 Correction, the USB BFO frequency is too far from the
filter center frequency, or the LSB is too close.
 The reason there is no change when going from USB to CW
is that the BFO frequency is the same.

Mark  WB8JKR


>Second question:  With this 1680,
> there is a noticable degeneration in audio quality (the base
> disappears) when the function switch moves from LSB to USB, and no
> change at all from USB to CW.  My hunch is that it's miswired.  Any
> ideas?  Thanks in advance.  Also, many thanks for the schematics, to
> all who answered my request.
>
> Fred Wittman

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