[MilCom] Question on multi scanner hook ups

[Bill "Superspy" Boltinghouse]

Take a look at Stridsberg

http://www.stridsberg.com/prod01.htm

-----Original Message-----
From: milcom-bounces at mailman.qth.net
[mailto:milcom-bounces at mailman.qth.net]On Behalf Of Ron
Sent: Saturday, August 27, 2005 4:23 PM
To: MilCom
Subject: [MilCom] Question on multi scanner hook ups


 Do directional couplers with -xx dB isolation taps help or hinder multi
scanner hook ups to a single antenna, in regards to them introducing birdies
or interference back up the antenna cable to the other scanners causing you
to run the 'squelch' on the units at a higher setting than if connected
individually to their own antennae? (Talk about run on sentences!)
     I was given several of these with F connectors (input, output and 4
isolation taps on each one,) with the 4 taps on each one being the same
'isolation' value of either -15, -20, -25 or -30dB, by a friend who does
CATV installs. Units are marked 4 Way directional tap, 5-500 MHz.
    Price was right (free), but before I start  buying a bunch of F
connectors and adapters to hook the scanners up to my present single ICOM
R7000 Disconne and experiment, I figured I'd throw it out to this august
group.
    And while you are all online here, would they be of any assistance
isolating an RS-392 Short wave receiver from a Racal 6790 using a single
shared HF feed line? Would they work on frequencies below 5 MHz? With
degraded functionality?
    Should the unused taps/outputs be terminated with 75 ohm terminators?
    If you think I have any idea of what I am talking about, you are
mistaken!
    TIA, Ron in Southern NH



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