Not only that, but an SSB contester might never care to listen to a signal
any wider than 1.8 kHz and put such a filter in the wide position on
purpose, as I have done. I don't care a darn about "lows" in SSB signals I
receive, and in fact filter them out anyway, in post-IF filters. This gives
me better selectivity, and an enhanced ability to understand the speech, in
a hostile audio environment. If I want nice audio, I go in the living room
and listen to my stereo (grin).
73 de Gary, AA2IZ
----- Original Message -----
From: "Ken Brown" <ken.d.brown@hawaiiantel.net>
To: <geraldj@storm.weather.net>; "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Sent: Sunday, March 29, 2009 1:30 AM
Subject: Re: [TenTec] poor harsh audio on OMNI-V
Its certainly possible to have a faulty or none-standard narrow
filter.
Someone not interested in SSB operation could have put a 1.8 kHz filter
in for the "wide" default 9 MHz filter. (I am guessing the Omni V filter
selection scheme is very similar to the Omni VI, if I'm wrong about that
point then I could be wrong about this whole message) Check out the
stock number on the filter and see what you've got. If it was an Omni
VI, it should be a 48058, maybe the same for an Omni V. If it is a
48037, it is too narrow for "nice" sounding SSB. If that were the case,
it would be in the SSB transmit path too. What kind of TX audio reports
do you get?
DE N6KB
Ten-Tec IF filter data
Model Number / Stock Code / Bandwidth Hz / Center frequency MHz / Poles
Following the number of poles are other numbers that have been reported
seen on these filters. They may be date codes or PCB design numbers.
216 / 48161 / 500 / 9.002210 / 6 RTTY filter
217 / 48036 / 500 / 9.000750 / 8
218 / 48037 / 1800 / 9.001500 / 8
219 / 48055 / 250 / 9.000750 / 6 /8047 / 6840
??? / 48057 / ??? / ???? / 4 / 84-05
220 / 48058 / 2400 / 9.001500 / 8 /8307 / 6840
221 / 48243 / 250 / 9.000500 / 6 Low note CW filter
282 / 48054 / 250 / 6.299250 / 8
285 / 48053 / 500 / 6.299250 / 8
288 / 48075 / 1800 / 6.300000 / 8 / 9125 / N5
unk / 48127 / 6000 / 9 / ?
unk / 48074 / 2400 / 6.3 / Stock (non-option) 6.3 MHz filter>
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|