[MRCA] AN/URT-12, T-408, PP-950 info needed (CW/AM Navy/CG set)

[Robert Flory]

Patrick,
The tuner may actually be made for a shortwire.  HI

Often these rigs are made to go into a short vertical.  

You can usually make networks like these tune into a 50-ohm resistive load
by adding an external series cap. of about 400pF.  A transformer to bring
the impedance down lower to about 25 ohms can sometimes help.  The
combination of the two makes my TCS sing on 80m into a 50 ohm load.  

My TCK does not need any external help to match nicely into a 50-ohm load,
nor did my TBW.  

Rob Flory


> [Original Message]
> From: Patrick J. Jankowiak <recycler at swbell.net>
> To: <mrca at mailman.qth.net>
> Date: 3/25/2009 11:24:36 PM
> Subject: Re: [MRCA] AN/URT-12, T-408, PP-950 info needed (CW/AM Navy/CG
set)
>
> I have talked to Sam. He does not have the manual.
> He has modded his due to the tuner being made for a longwire. I'd like 
> to keep mine stock if possible.
>
> The transmitter has two 4-65's modulated by two 4-65's. It will be a 
> shame if it is not gotten up and running.
>
> Patrick
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