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[TowerTalk] Looking for a HP 80/40 Duplexer

To: towertalk@contesting.com
Subject: [TowerTalk] Looking for a HP 80/40 Duplexer
From: Randy Farmer <w8fn@windstream.net>
Date: Mon, 17 Nov 2025 17:54:08 -0500
List-post: <mailto:towertalk@contesting.com>
I'm investigating upgrading my station from its present 500W capability to 1500W. I've located sources for most of the up-rated bandpass filters and other hardware required for the project, but can't seem to find a source for a duplexer to split a 80-40 dipole for SO2R use. I'm presently using one of the Low Band Systems 500W 80/40/20 triplexers for this function. LBS apparently makes a 1500W 80/40 duplexer, but it appears the LBS stuff is no longer available in the USA. Does anyone have or know of a suitable 1500W unit? I do NOT need it to be rated for 100% duty cycle since I'm only interested in CW and occasional SSB use, but it needs to hold up under contest conditions with a full power amplifier.

4O3A makes a nice 20/15/10 triplexer, but they don't have any high power 80/40 units. Antennas-Amplifiers (distributed by DX Engineering) makes nice HP bandpass filters, but not a triplexer or duplexer. VA6AM (also distributed by DX Engineering) doesn't have any high power devices.

73...
Randy, W8FN
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