--- In FT817@y..., "Richard B Drake" <rich@w...> wrote:
According to the instructions on page 14 of the manual turning
"Nar" on or off controls either the YF-122C (CW) or the YF-122S
(SSB) filter depending on which one you have installed. I don't
have the SSB filter, but it's likely that it makes so little
difference that it is difficult to tell whether it's on or off!
----
73, Rich - W3ZJ
Rich,
I think the material on page 14 is in error regarding the SSB filter.
The only time the NAR works is when Menu 38 is in CW. If you have
the SSB filter in and set #38 to CW, NAR "works" but it not working
right and sounds strange.
If your hearing is OK (still hearing the lows and mid-range), then
you should be able to hear the difference with and without the SSB
filter. The SSB filter is really flat while the ceramic filter is
not even close. The "boosted" lows and highs are apparent when
listening to background noise. (I'm using boosted in relationship to
the ceramic filter.) With a good speaker (like the SP-8) hooked to
the 817, I find that the audio from many stations is more
understandable with the optional SSB filter. The filter also cuts
off the real lows (and highs) much better than the stock filter
resulting in less muddle in the audio. Again, I point out that this
filter is a refinement to the rig in contrast to the BIG improvement
resulting from adding the CW filter (makes CW useful with the 817).
72 de Barry - W4WB
