Gary,
The Uniden ARU-251K is a 450-470 MHz CRYSTAL based repeater/base station with a
very limited internal controller. If it can be dropped into the 440 ham band
you will then need an external controller. The standard duplexer with the unit
is a simple notch type which may be suitable for operation on an isolated site
but will be nothing but problems on a crowded one. The first thing to do is to
check the repeater on the frequency that it is currently set up for and
determine if it is working properly. After that with a service manual and the
proper test equipment and a new set of crystals you may be able to move it into
the ham bands.
Milt
N3LTQ
----- Original Message -----
From: ke5...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 18, 2010 8:24 PM
Subject: [Repeater-Builder] uniden aru 251k
I have this repeater and I need the modification for 440 amateur use. Any
help on this will be appreciated. Thanks in advance. Gary
Sent from my Verizon Wireless BlackBerry
------------------------------------------------------------------------------
From: MCH <m...@nb.net>
Date: Tue, 18 May 2010 20:17:14 -0400
To: <Repeater-Builder@yahoogroups.com>
Subject: Re: [Repeater-Builder] Sinclair dipole phasing harness
I can't speak specifically of Sinclair, most all of the models I've used
will do either omni or cardioid by moving the elements. The spacing from
the mast stays the same.
Joe M.
Nate Duehr wrote:
> On 5/18/2010 12:29 PM, Larry Horlick wrote:
>> I suspect that the harness does not affect the
>> pattern, but rather it is the dipole to mast spacing.
>
> Yes, I believe this is correct. Whenever I've looked, notice that the
> omni versions are 1/2 wave spacing from the mast, and the cartioid are
> 1/4 wave spacing from the mast, in almost all of Sinclair's product line.
>
> Nate WY0X
