[Elecraft] Audio Monitor

[Ron D'Eau Claire]

 -- "Why should I set two filter positions for OP1?"  I believe the answer
> is that the page 10/20 settings are optimum for transmit audio on SSB,
> although they may not be optimal for receive on SSB.  And that's why the
> manual says to also set FL2 to OP1.
>
> FL2 is never used in SSB transmit, so you can adjust the BFO for that
> filter to anything you wish (using Spectrogram or whatever) and it won't
> affect your SSB signal.
>
> Therefore, I would recommend that you do not change the settings for FL1
> OP1 from those derived at on page 10 of the manual (at least not very far
> from that!)..
>
> 73, de Earl, K6SE

That's very true, Earl, as is this statement under  "SSB Transmit BFO
Optimization" on Page 22 of the SSB module manual:

"...you may wish to experiment with these settings, adjusting them slightly
to obtain the best voice quality. You can use another ham-band receiver, or
ask a nearby station listen (sic) to your signal as your vary BF1. Use CAL
FIL, moving the BFO as much as 150 Hz from the frequencies listed..."

It would have been nice had they mentioned listening to your own voice as
well.  Most ops who I have spoken with, including myself, found the exact
frequencies given not optimum for best communications. The "stated"
frequencies in the manual work, but variations in voice and microphone make
a significant difference. I have a very low-pitched "gravelly" voice, for
example, and on-air tests with trusted ops as well as tests made by
recording my own voice on an auxiliary receiver suggest a setting that moves
the passband upward significantly, taking the low frequency "rumble" out of
my voice.

Ron AC7AC
K2 # 1289