Hi Fraser -
You are right about the different audio in the T-T rigs. The LSB on both my
Paragon II and my OMNI 6+ is much warmer than when changed to USB. There it
is thinner and sharper, which am sure you have already noted. It is the
filter slope, I believe. Your filter is not faulty. I have tried three of
them and the results are much the same.
See you do a bit SSB from your club. Hope to see you on CW as well.
73 - Don, ve1bn@eastlink.ca
----- Original Message -----
From: "Fraser Robertson" <g4bjm@hotmail.com>
To: <ken.d.brown@hawaiiantel.net>; "Discussion of Ten-Tec Equipment"
<tentec@contesting.com>
Sent: Monday, March 17, 2008 8:49 PM
Subject: Re: [TenTec] Omni VI Plus audio
>
> Our club's Omni6+ option3 sounds very different on USB and LSB, and it's
> not possible to correct it by adjusting the BFO frequencies, so it must be
> down to the filter being asymetrical. I understood that was a common
> failing, but perhaps our filter is faulty?
>
> 73 Fraser G4BJM
>> Date: Sun, 16 Mar 2008 18:37:51 -1000> From: ken.d.brown@hawaiiantel.net>
>> To: tentec@contesting.com> Subject: Re: [TenTec] Omni VI Plus audio> > >
>> > Now I don't know why the higher bands are different on your rig.> >
>> Wonder if you have an antenna problem? > >> > > If the SSB Receive (or
>> transmit) audio sounds different on 10, 15, 20 > meters than it does on
>> 40, 75 meters, you should be comparing the sound > on USB versus LSB.
>> Your SSB audio characteristic should not change at > all due to changing
>> bands, other than because of the convention of using > USB above 9 MHz
>> and LSB below 9 MHz. The audio characteristics also > should not change
>> very much from USB to LSB. If it does change, that is > an indication
>> that your BFO frequencies are misaligned for one or both > SSB modes.
>> Another possibility, although not nearly as likely, is a > partially
>> failed crystal filter with a non-symmetrical passband shape. > The first
>> thing to do is check the BFO frequencies. If you install new
> > filters, of any brand, without getting the BFO frequencies right, you >
> will still have a problem.> > DE N6KB> >
> _______________________________________________> TenTec mailing list>
> TenTec@contesting.com> http://lists.contesting.com/mailman/listinfo/tentec
> _________________________________________________________________
> Share what Santa brought you
> https://www.mycooluncool.com
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
_______________________________________________
TenTec mailing list
TenTec@contesting.com
http://lists.contesting.com/mailman/listinfo/tentec
|