[Milsurplus] T-47/ART-13 into 50 ohm load

[Meir WF2U]

Dennis,

What plate voltage are you feeding your ART-13 with? 

Obviously, not the standard voltage as produced by the dynamotor. The values
are going to be different, as in you case, because the output impedance of
the 813 will be different, requiring different output circuit values. 

Meir WF2U
Landrum, SC

-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of mac
Sent: Saturday, March 23, 2013 1:22 PM
To: WA5CAB at cs.com
Cc: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] T-47/ART-13 into 50 ohm load

For 50 ohms I use fixed shunt caps, 400pf for 75/80 meters, 200 for 40  
and 100 for 20.  A 400pf variable would cover the whole range, of  
course.  Range of adjustment inherent in the ART-13 tank circuit os  
very wide, I can load into 50 ohms FB on 75M with only my 200pf  40M  
shunt switched in for ex. and conversion articles I've seen over the  
years list shunt cap. values all over the lot.  Never tried a UnUn....

Dennis D.  W7QHO
Glendale, CA

************
On Mar 23, 2013, at 9:00 AM, WA5CAB at cs.com wrote:

> How well does a T-47 (or equivalent) match a 50 ohm resistive load  
> on say 3
> to 10 MC?  Is there any standard outboard "fix" like an UnUn or shunt
> variable capacitor?  Purpose would be to feed a remote antenna tuner.
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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