Hello All,
We must have one of the (well two) of the older units. We have one of your
222 repeaters on one of Cook Towers sites and that is what they installed.
One club is on two meters, we are on 222 and the two meter group has a 440
link to some where. We are all using the 1" and 5/8s run going up the tower
and it has worked very well for many years the Austin tri-plexter. They are
the ones in a cooper box in the tower building and the one up many hundreds
of feet is water proof I would think I have never viewed that end. We do
have a RFS PD-220 antenna up there but is has been there for many years as
well. The bottom line is we have had good luck with an older Austin. I guess
they have changed or something.
73 Russ, W3CH
----- Original Message -----
From: "Bob Dengler" <[EMAIL PROTECTED]>
To: <Repeater-Builder@yahoogroups.com>
Sent: Wednesday, February 02, 2005 2:49 PM
Subject: Re: [Repeater-Builder] Re: Homebrew a 2M/440 crossband coupler?
>
> At 2/2/2005 06:12 AM, you wrote:
> >Good morning All,
> >There is a small company called Austin
> >that makes a very nice Diplexer even
> >comes standard with type "N"'S in a nice
> >copper box. They even make it for tri-band
>
> We bought one several years ago specifically for diplexing a VHF & UHF
> system onto one antenna. However the box was not well assembled IMO & the
> loss on the 440 side was high (0.75 dB, their spec. was 0.5 dB). I was
> able to get the loss to just above 0.5 dB by drilling out the rivets,
> opening the case & adjusting something on the circuit board (can't
remember
> just what). This was all done on a VNA so band isolation was not
> compromised.
>
> Even after the tuning the loss would go up if the connectors were flexed
> due to the flimsy case, so we ended up using a Comet duplexer
> instead. Much lower loss.
>
> I also have an Austin triplexer that is much older. The construction of
> that unit is rock solid: well shielded & connectors don't flex at all.
>
> Bob NO6B
>
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> Yahoo! Groups Links
>
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>
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