[Boatanchors] Meter for ARC antenna relay

[J. Forster]

Severaql things:

In the ARC-5 or BC-442 there is an RF current transformer between the
antenna circuit and the thermocouple. It may or may not be 1:1

No RF is applied to the meter. The meter current "19.5 +/- 1.5 mv, 750 ma"
is produced by heating of the thermocouple. It is DC.

The meter is a low resistance voltmeter, approximately 20 mV FS. The
voltmeter resistance is such that it draws 750 mA at 20 mV.

-John

==================




> Does anyone happen to know what meters go with the thermocouples used with
> the command sets?  Fair has the thermocouples but not the meters and
> they'd
> probably work for some of my lower power projects.  According to the data
> plate, they're rated at "19.5 +/- 1.5 mv, 750 ma" but is that RF, whatever
> to the meter or something else?  For full output on CW (40w into a roughly
> 16 ohm capacitive load for the AN/ARC-5 transmitters), the RF current
> should
> be around 2 amps with a little rounding and some wiggle room which makes
> things slightly confusing.
>
>
>
> Any thoughts or advice?
>
>
>
> Best regards,
>
>
>
> Michael, WH7HG, A&P 1803851 Ph: 1-866-733-0218
>
> I live with a maniac at home... my other me.
>
>  <http://www.nationalmssociety.org/chapters/NTH/index.aspx>
> http://www.nationalmssociety.org/chapters/NTH/index.aspx
>
>  <http://wh7hg.blogspot.com/> http://wh7hg.blogspot.com/
>
>  <http://kludges-other-blog.blogspot.com/>
> http://kludges-other-blog.blogspot.com
>
> Hiki Nô!
>
>
>
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