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LF: Fw: LF/MF DUAL WATCH

from [g3kevmal] [Permanent Link][Original]
To: "rsgb" <[email protected]>, <[email protected]>
Subject: LF: Fw: LF/MF DUAL WATCH
From: <[email protected]>
Date: Sat, 30 Jun 2018 17:09:53 +0100
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Sent: Saturday, June 30, 2018 5:08 PM
Subject: Re: LF/MF DUAL WATCH
 
OR
DIGITAL switching
Time Division switching using one antenna, two inductors one resonated at MF and one at LF, output from each inductor digitally switched between the two  and fed via one coax cable to a MF BPF and a LF BPF each going to a separate RX for simultaneous monitoring of each band.  This method using a Digital sequential fast switch and BPF filters will achieve the object and give good isolation between Receivers
Similar idea to TDM SYSTEMS
G3KEV
 
 
Sent: Saturday, June 30, 2018 2:48 PM
Subject: LF/MF DUAL WATCH
 
Chris es Co
Easy solution for 2 x RX dual watch
Rhombic antenna or V Beam etc fed to a wide band RF amplifier, output to 2 x Transistor source follower , one to each RX and select frequency as required.
You can also use valves/tubes with Cathode follower outputs to each RX
 
G3KEV
 
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