[BC] Modulation measurement

[RichardBJohnson at comcast.net]

You know, the HV probe doesn't need to be connected
to high voltage. You could connect it to some lower
voltage you can already measure such as 300 VDC.

Then you can establish what the ratio really is
with your multimeter.

I remember a physicist at PPL who was all bent out
of shape because his calibration set had gotten
destroyed so he couldn't measure the voltage
on his HV supply (about 250,000 volts) until
Congress approved a new budget. I couldn't make
up a story like that. A call to Vishay, and some
plastic sewer pipe got him an accurately-calibrated
voltage sample by the end of the day. I became
an instant hero.

Vishay makes resistors that have about zero change
in resistance with voltage. Many glass film resistors
by other vendors are not so lucky.

Cheers,
Richard B. Johnson
Website http://AbominableFirebug.com

----- Original Message -----
From: "Tom" <Radiofreetom at gmail.com>

Hmm

I always wondered about that - you'd have to match - or at least know 
what the conversion would be - to use any given probe with any given 
meter.....