The listing of optional filters for the 9MHz and the 6MHz IF for the
Omni 6 and the Omni 6+ is listed at www.tentec.com .
Forget the 15kc filter. That is a non-changeable monolithic filter that
sets the pre-9MHz IF bandwidth for FM.
The Omni 6 has five filter selection buttons. The first three, left to
right, are for selecting the filters you install in the 6MHz IF. The
second two buttons are for selecting the filters in the 9MHz IF.
To select a filter, you push it's button to turn it ON, you push it's
button again to turn it OFF. They are back lighted so you will know
which one you have selected. You can turn on one or all of them at the
same time.
In the Omni 6 Upgrade 3 9MHz IF, there is a 'fixed' 2.4kc (factory
furnished) filter, or you can buy from Inrad, a replacement 2.8kc
filter, your choice. You MUST have a minimum of 2.4kc filter in this
slot because it is part of the transmit chain. Then there are two more
slots for you to buy optional filters for the 9MHz IF. These two slots
are optional bandwidth's of your choice. On the Passband Tuning Board
(PBT),or the 6MHz IF, you have a standard 2.4kc filter and three
additional optional filter slots. The standard filter is not switchable,
but all of the three optional filter slots are switchable. You buy the
optional filter bandwidths of your choice.
To know what filter your selecting, you must remember where you put each
filter...or you can label the switches yourself.
Tom/W4BQF
Chester Alderman
calderman@cox.net
-----Original Message-----
From: tentec-bounces@contesting.com
[mailto:tentec-bounces@contesting.com] On Behalf Of Ken Brown
Sent: Sunday, February 02, 2003 9:08 PM
To: tentec@contesting.com
Subject: [TenTec] Omni VI 9MHz IF
Hi all,
Thank you to those who have answered my previous question about the
various versions and upgrades of the Omni VI. It is still not completely
clear to me what is available for 9 MHz IF filters. My radio has two
filters (not counting Y1 the 15 kHz 2 pole filter) the "standard" 2.4
kHz filter and the "narrow" 0.5 kHz filter. And there is no space for a
third (or second optional) filter. Since there has been lack of clarity
in my question, and consequently a similar lack in the responses, I
still do not know whether the most available spaces is two total, or two
optional filters for a total of three (counting the standard 2.4 kHz
filter), not counting the 15 kHz two pole filter. If a total of three is
available on a more recent 9 MHz mixer/IF board, how does the selection
and indication of which filter is in use work? Push the button three
times to scroll through all three possibilities and back to the
beginning? How do you know which one of the narrow filter options is in
use (other than by how it sounds, or remembering how many times you
pushed the button) a two color LED perhaps?
Ken N6KB
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