And, another thought: Often times on ebay, and at swap meets, you will
see
ones by Measurments Corp-- Model 59. (think some also calles "Boontown"
meters , were made in Boontown, N.J.)

Actually, it's Boonton, N.J., I've been to the
Measurements Corp factory. There was
another company there that used the name
"Boonton". I have one of their RF Voltmeters.

...These
come in 2 varieties- a LOW freq head (freq range unknown), and a HF-VHF
version 2.2 MHz to 400 MHz ...

One meter/power supply unit, three tuning
heads. Mine are packed at the moment,
but the LF head covers roughly 60 kHz to
2.3 MHz, the most common head covers
2.2 to 400 MHz, and the UHF head covers
up to about 1GHz, as I recall.

I have all three heads, and use them all.
Great instrument, but many newcomers
(even a Hewlett-Packard RF engineer I
once worked for) have never seen one.

73, John - K6QQ