Message-ID: <003701bfb77d$b2927180$261c893e@h9h2t8>
From: "Martin Evans." <radio@emart.freeserve.co.uk>
To: rsgb_lf_group@blacksheep.org
References: <000601bfb6fe$6ec18d30$0a00a8c0@server1.ThreeLakes.ca>
Subject: LF: Re: RF Thermo Couple Meter, calibration?
Date: Sat, 6 May 2000 18:01:27 +0100
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I always believed that you could calibrate true bolometric RF ammeters using
DC? I've checked a couple of thermocouple RF ammeters and it seems to work.
Martin Evans
Mollie's Loft bookshop
96 High Street
Clydach
Swansea   SA6 5LN
Tel 01792 842135
radio@emart.freeserve.co.uk
----- Original Message -----
From: Larry Kayser <kayser@sympatico.ca>
To: <rsgb_lf_group@blacksheep.org>
Sent: 06 May 2000 02:56
Subject: LF: RF Thermo Couple Meter, calibration?


> Greetings All:
>
> I uncovered two ancient RF Thermo Couple Meters this evening, I had put
them
> away some years ago in anticipation that at some point I might want to
> measure RF amps.  They are identical, made in 1940, Ref No. 10A/8479.
Full
> scale 2.5 amperes, noted "for Radio Frequency Only".  They are of what I
> would call "light construction" not the heavy duty construction that one
> associates with the better products made for WW II.
>
> How might I calibrate them?  I have some excellent calibrated resistors
but
> they are in general a little small to get a couple of amps into them
without
> some residual damage.   Is some 60 Hz a little to low "for Radio Frequency
> Only"?  If anyone has a simple process I would appreciate hearing about
it.
>
> Thanks in advance.
>
> Larry
> VA3LK
>
>
>
>
>