I have a Ballantine 323 AC voltmeter and a Boonton 91H RF "millivoltmeter".? The Ballantine is solid-state and has a usable range to 20 MHz, the Boonton is vacuum-tube and has a usable range to 1200 MHz.? The Boonton meters are relatively easy to find, but the probes, cables
and probe accessories are often very scarce.? Both meters have the lowest scale of 1 mV FS.??? The meters have different intended purposes.? I'm sure that you could use them interchangeably for a few limited applications, but that's not what they were designed for.
Mike, WB0LDJ
mharmon at att dot net
