[NLRS] Want to measure 4 5 to 45 mw at 28.2 Mhz

[Barry VE4MA]

Why not use an RF voltmeter probe ( even a home made probe with a shunt 
diode and coupling cap  accross a good load...this is only HF and it works 
well

Barry VE4MA
----- Original Message ----- 
From: "Dr.Gerald N. Johnson" <geraldj at ispwest.com>
To: <nlrs at mailman.qth.net>; "Carl Estey" <cestey at mn.rr.com>
Sent: Thursday, October 13, 2005 8:18 PM
Subject: Re: [NLRS] Want to measure 4 5 to 45 mw at 28.2 Mhz





Dr. Gerald N. Johnson, Electrical Engineer
----- Original Message -----
From: Carl Estey [mailto:cestey at mn.rr.com]
Sent: 10/13/2005 4:55:09 PM
To: nlrs at mailman.qth.net
Subject: [NLRS] Want to measure 4 5 to 45 mw at 28.2 Mhz

>
>
> Recently CJ, K0CJ, did a mod on my Radio Shack HTX-100 10-meter
> transceiver to work as a I/F for use with my Microwave Modules
> MMT-432-28-S.  CJ got it to work, but the RF output of the transverter
> is pretty low and we would like to measure how much drive the HTX-100 is
> providing to the transverter since low drive could result in lower than
> expected output power.  And we are afraid to crank up the drive for fear
> something else might be causing low power output and the extra drive
> might do damage.
>
> Does anyone have the means to measure from 5 to 50 mw of 28 Mhz RF?  If
> so, I would like to bring the radio/transverter over to make the
> measurements.
>
> Any ideas?
>
> 73
> Carl Estey WA0CQG
> wa0cqg at arrl.net
> (952) 250-3110 (Cellphone)
> (952) 835-0056
>
>
If all fails you could try an old fashioned measuring tool. A couple 2 volt 
60 ma. lamps. One of them runs full brilliance with 120 mw. Z is 30 ohms, so 
its not a perfect match. You can put a pair of them side by side and match 
the color and brilliance with DC on the reference lamp and get the power 
that way. Lamp numbers 48 or 49 if I remember the numbers correctly.

73, Jerry, K0CQ

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