[amsat-bb] Re: Arrow antenna reconfiguration results - UPDATE

i8cvs domenico.i8cvs at tin.it
Fri Sep 25 17:52:10 PDT 2009

----- Original Message -----
From: "Bruce Robertson" <ve9qrp at gmail.com>
To: "Jeff Yanko" <wb3jfs at cox.net>
Cc: "AMSAT-BB" <amsat-bb at amsat.org>
Sent: Friday, September 25, 2009 3:53 PM
Subject: [amsat-bb] Re: Arrow antenna reconfiguration results - UPDATE

Jeff --


2. If I'm correct, your replacement duplexer is rather larger than the
one it is replacing. It would be a great topic for a Journal article
if someone with the necessary equipment and expertise were to design a
replacement with less loss.

73, Bruce

Hi Bruce, VE9QRP

See QEX March/April 2002 page 47 "A Low-Loss VHF/UHF Diplexer"
by Pavel Zanek OK1DNZ
Loss = 0.15 dB at VHF and 0.40 dB at UHF
Insulation VHF/UHF = 70 dB
Max RF power at VHF or UHF or VHF/UHF = 100 watt CW at 25°

73" de

i8CVS Domenico

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