[Boatanchors] TCS-9 output matching?

[Mark Foltarz]

I think the TCS sets are an "L network" output.

Try adding a shunt capacitance like a couple broadcast band variables ( 
something like 800 uufd )  across the antenna to ground to make it a PI output.

Hook the antenna up also across the antenna output and ground connections.

Adjust the TCS as normal and then peak the shunting capacitor.

Go back and forth  -  dipping and peaking - until satisfied.

de KA4JVY

Mark




----- Original Message ----
> From: Roger Basford <Roger at new-gate.co.uk>
> To: Boatanchors at mailman.qth.net
> Sent: Thu, May 5, 2011 12:51:15 PM
> Subject: [Boatanchors] TCS-9 output matching?
> 
> Hi All,
> 
> I'm putting together a TCS-9/TCS-12 station and I read a mention  of a 
> simple mod to allow the TX to use coax-fed antennas. Has anyone got a 
> copy of this? I'm getting  about 1.5 amps RF into a BC-375 dummy load 
> but not had much success with an end-fed 66ft inverted L on 80  metres.
> 
> Also, the handbook I downloaded has an addendum showing a mod to  the 
> antenna current meter, moving it from a ground lead to the feed to the 
> antenna terminal, which seems more logical to me. Any thoughts on this? 
> With an external RF ammeter in the feed to the dummy  load I get the 
> same reading as the panel-mounted meter.
> 
> 73
> 
> Roger/G3VKM,  Norfolk,  England.
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