[Motorola] Can TDN7407A 450-470 CELLWAVE Duplexer be Tuned for440-450???

[KBØNLY]

That duplexer is actually a Motorola-branded Celwave 633-6A-2N, it will do 
the ham band as I have a couple of them working there just fine, low power 
less than 50w on these.  I have one on my repeater here at 25w and it work 
fantastic, no sign of desense.

It takes some good test gear to get them tuned, at a minimum a spectrum 
analyzer and sweep generator to get the notches adjusted correctly.  But yes 
what your asking is possible!

73,

Scott KBØNLY


-----Original Message----- 
From: Michael, W1RC
Sent: Friday, June 03, 2011 7:42 AM
To: motorola at mailman.qth.net
Subject: [Motorola] Can TDN7407A 450-470 CELLWAVE Duplexer be Tuned 
for440-450???

I recently acquired a nice UHF Motorola GR300 mini-repeater and am
considering setting it up on 440-450 MHz.  The duplexer label says it
covers from 450-470 MHz and I am wondering if anyone with more
experience than I with these units has had success tuning it down to
work in the 440-450 MHz range?

TIA,

73,

Michael, W1RC

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