VTVM w/RF Probe

[Mike Foerster]

Make your own.  Might not be terribly accurate, but most of the time, you're
looking for a relative indication.

Tip comes into a  .001 cap, then to about a 4 meg resistor to the DVM
input..  Then, put a 1n4148 diode do ground (cathode to gnd).
    Actually, the old Radio Amateurs Handbook that I got it out of, shows
two different versions, the other with the anode of the diode to ground.
The only difference would be the output polarity.

I've got one that I built years ago, but I can't find it now...

Mike


----- Original Message -----
From: "ejforwood Jerold Forwood" <ejforwood at MSN.COM>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Wednesday, December 12, 2001 12:34 PM
Subject: VTVM w/RF Probe


I have been away from working on ham equipment since the 70's now I am
trying to start to align a SB-401 Transmitter.  The manual calls for the use
of a VTVM with an RF Probe.  I asked a clerk at RadioShack.com what is used
today for this type of measurements? His reply was, "What's a VTVM?".
So now I pose the question here.  What do you use today, if you don't have
an old VTVM with an RF Probe?  I also don't want to spend an arm and a leg
for it.  I don't feel I need to spend enough on the meter to buy another
radio.

Thanks and 73's,
Jerry, K0EJF

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