Inrad still makes two versions of the 400hz filter for the 9MHz IF, one for
600hz center freq and one for 750hz center freq
Barry N1EU
On Tue, Apr 2, 2019 at 5:39 PM Ken Brown <kenradiobrown@gmail.com> wrote:
> Hi Jim, You're right about being able to use the N-1 and N-2 functions when
> you put optional filters in those two slots on the 9 MHz IF board.
>
> One thing to remember is that filters in 9 MHz IF do not work exactly the
> same as filters on the 6.3 MHz IF. The 6.3 MHz Passband Tuning IF.
>
> The oscillator that mixes with the 9 MHz IF to convert to 6,3 MHz, and
> again back up to 9 MHz is adjustable. That is what the PBT knob does, and
> it allows you to move the apparent position of the 6.3 MHz IF filter around
> within the bandwidth already determined by the filters in the 9 MHz IF.
> That way you can use a narrow filter and adjust it for the audio tone you
> like.
>
> The oscillator that mixes the 9 MHz output of the PBT board down to audio,
> the BFO, is not adjustable (at least not from the front panel of the radio)
> and so when using narrow filters in the 9 MHz IF you do not have the same
> audio tone flexibility. That is why Ten-Tec used to sell more than one
> version of the 9 MHz IF filters for the narrow bandwidths.
>
> DE N6KB
>
>
> On Tue, Apr 2, 2019 at 8:49 AM Jim C <1291jim@gmail.com> wrote:
>
> > Hello,
> >
> >
> >
> > Moving from an Omni-V to a 6 Plus (I can finally afford one!)
> >
> >
> >
> > With my Omni-V I had just two filters. A 500 in the passband and another
> > 500 in the IF. That gave me a "500" and a "Narrow" (N-1) which worked
> > fine,
> > but I'd like to see if I can do better with the 6 plus.
> >
> >
> >
> > This will be for CW only.
> >
> >
> >
> > My 6+ Pass-Band board has the following filters:
> >
> > 1. INRAD #757 2400 Hz
> >
> > 2. INRAD #750 400 Hz
> >
> > 3. Ten Tec # 285 500 Hz
> >
> > 4. INRAD # 757 250 Hz
> >
> >
> >
> > My 6+ IF board is empty with room for 2-filters
> >
> > 1. Empty
> > 2. Empty
> >
> >
> >
> > I believe that when I fill the IF slots I will be able to use the N-1 and
> > N-2 options?
> >
> >
> >
> > I'd like to know my options for the IF slots and if I have the proper
> > set-up
> > in the Pass-Band area?
> >
> >
> >
> > Thanks for your help,
> >
> >
> >
> > Jim
> >
> > W6JIM
> >
> > _______________________________________________
> > TenTec mailing list
> > TenTec@contesting.com
> > http://lists.contesting.com/mailman/listinfo/tentec
> >
> _______________________________________________
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>
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