Could this be a DSP noise blanker or noise reduction induced distortion?
The O-II (depending on the DSP version) can exhibit some audio distortion
from the digital signal processing if NB and or NR is enabled.
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Gary Hoffman
Sent: Sunday, March 29, 2009 4:35 PM
To: ken.d.brown@hawaiiantel.net; Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] poor harsh audio on OMNI-V
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>
>
>
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>
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