[Test-Equipment] Information needed RF meter

[WA5CAB at cs.com]

If you are going to be using the SX-28-A (AN/GRR-2) anyway, first thing I 
would try is removing the antenna from the receiver.  If the S-meter still 
pegs, try shorting the two antenna posts.

I rather doubt that the 200 uA meter will be sensitive enough to give a 
usable reading without a series tuned circuit between it and the diode.  But 
you could try it if the bare receiver is too sensitive at a distance from the 
trnasmitter where you can still read the meter.  Put something like a 
1500-3300 uuf capacitor across the meter,  Connect a diode to the positive meter 
post.  Connect about 6' of wire to the other diode lead and to the meter's 
negative post and arrange them to be more or less parallel to the antenna on 
the transmitter.  You might get a usable reading, but I've no feel for it.  I 
know that the ME-61/GRC, which uses a 1 mA meter, just barely gets the 
needle off of the post with a BC-611 alongside.  The BC-611 runs a nominal 200 
mW.

In a message dated 10/20/2009 7:13:42 PM Central Daylight Time, w7ksg at q.com 
writes: 
> Hi Robert:  OKay.  Here is what I am doing.  I have an AM transmitter 
> rated at 100milliwatts on 1620Khz.  It is connected to a 8 foot vertical 
> antenna, with a loading coil and variable capacitor, and I would like to connect 
> the meter so that I can adjust the loading coil turns and capacitor for 
> maximum output.  I know that I can use a scope but I need this to be 
> portable.  What I am trying to do is demonstrate a recording that I have with 
> President FDR giving his December 8, 1941 talk to the nation about the Japanese 
> bombing of Pearl Harbor and declaring war on Japan.  I have a Hallicrafters 
> SX28A  tuned to 1620Khz so that the broadcast can be heard using the 1941 
> era receiver.  The transmitter is so close to the receiver that it pegs the 
> S-meter which is why I need the milliwatt RF meter.  Any suggestions?

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480