[TenTec] filters

[patents@dx0man.prestel.co.uk]

Scott; you do not need to take the bottom off, unless you need to
change a filter. The right hand filter button is the "narrow" option
for the 9 mHz IF on the Omni-V. Hit the narrow button and tune thru a
steady carrier. Now release the narrow button and hit the 500 button
to activate the 500 Hz filter in the 6 mHz second IF.  Tune thru the
same carrier. You should hear the difference in bandwidth quite
easily. If you really do have a 1.8 kHz filter in that narrow
position, you can also copy SSB with it - if all the other filter
buttons are not activated. Thats another test.

Tuning thru a steady carrier will also show up a 250 Hz filter, if
you have one. They tune very sharply. Note that the button for any
slot where there is no installed filter will do nothing much !!

If you mainly use CW then I recommend a 500 Hz filter in the 9 mHz
first IF narrow position. I use that filter most of the time. Its
only disabled for SSB. I have tried a 250 there but in my view its
too narrow to be really useful. The 9 mHz 500 Hz filter  plus a second
500 Hz filter in the 6 mHz second IF addresses 99% of my CW
requirements. If I had no other filters I'd be comfortable with
just the two 500's for CW, and the stock 2.4 kHz filter for SSB.

I do have a 1.8 kHz filter installed (6 mHz second IF only) and a 250
Hz filter (also second IF only). I rarely need to use them. 

Hope this is helpful  -- John G3JAG


On 09-Feb-99 Scott Howell wrote:
> 
>               wonder if my msg regarding filters ever got to the
list.
> Does not look as if it did so I'll repost.
> 
> If you did see it then please excuse the repeat.
> 
> I have an Omni V. I first off need to know if I open the rig and
> look at
> the bottom or I should say I'll have my Xyl look at it. How can I
> determine
> which filter is in the first if as opposed to the two in the
> second. Then
> assuming my assumption is correct, I then believe I have a 1.8 in
> the first
> if and a 500 and 250 in the second I may have this backward in that
> the 500
> might be in the first if. In any case if this helps.
> On the front pannel there is a button in the row of filter buttons
> which is
> the last one on the right and I believe this kicks in the 1.8. 
> Ok, so assuming for the sake of I don't know, if you have a 1.8 in
> the
> first if a 500 and 250 in the second, what would performance would
> be
> gained by replacing the filter in the first if with a 500 as
> opposed to the
> 1.8. Now lets assume the first if in fact is a 500 and the second
> contains
> the 1.8 and 250. What if I were to replace the 1.8 with a 500.
> What performance would be gained.
> 
> any info would be appreciated. I am just curious and not
> necessarily going
> to do this unless its really the way to go.
> 
> tnx es 73 de Scott/n3byy
> 
> 
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----------------------------------
E-Mail: patents@dx0man.prestel.co.uk
Date: 10-Feb-99
Time: 10:25:17
John Crux
Consultant in product forgery - Asia and
Africa

----------------------------------

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