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RE: [TowerTalk] Help need Vacuum Relay Isolation 1.8 to 30

Subject: RE: [TowerTalk] Help need Vacuum Relay Isolation 1.8 to 30
From: "OM7ZZ, Jozef Urban" <>
Date: Wed, 05 Jan 2005 23:38:58 +0100
List-post: <>
We're builded 10 ANT / 2 Radio switch with Gigavac G2SP relays. On each ANT 
port are three of them used.
Achieved -60dB isolations on adjacent ANT ports and more than -70dB on non 
adjacent ports.
When both radios would like to select the same antenna, isolation is still 
around -68dB. 
All mentioned isolations was measured at 28MHz.

Some fotos and measurements are here:
Insertion loss
Isolations same ANT port
Isolations adjacent ANT ports
Isolations non-adjacent ANT ports

73 Jozef OM7ZZ

Skontrolované antivírovým programom NOD32


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