[Elecraft] CW rev, SSB tx and other stuff

[Don Wilhelm]

Nicholas,

CW is to CW reverse just as LSB is to USB.
For CW mode, the BFO is placed at a lower frequency than the filter center
and CW Reverse places the BFO above the filter center.  If using Spectogram
to set things, look carefully at the filter passband when changing from CW
to CW reverse - the passband will 'flip' (what was high audio frequencies
are now low and vice-versa).

If you change the BFO for best transmitted signal, and use OP1 filter for
receive, the received SSB signal will shift by that same amount - but we are
talking about a few tens of Hz here, so the pitch of the received audio will
not change significantly and you can simply tune a bit higher or lower to
compensate.

73,
Don Wilhelm  - Wake Forest, NC   W3FPR home page: http://www.qsl.net/w3fpr/
  QRP-L # 485   K2  SN 0020   mailto: w3fpr@arrl.net

----- Original Message -----
>
> Also, I have a few questions:
>
> What is the difference between CW and CW reverse?
>
> For 'SSB transmit BFO optimisation' (in the SSB adapter booklet), I
presume
> that means since the same filter is used for Tx and Rx. This means if I
> change the filter for better Tx audio, it will affect received signal as
> well?
>