[Boatanchors] Converting a milliamp meter to an RF Milliamp meter

[William L Howard]

> Is there any way to convert a milliamp meter to an RF Milliamp meter?
>
 Thanks, to all who replied. To explain what I am working on, I just got
a WW II German KF 42 training transmitter. Very unusual set and no one
seems to know anything about it. Art Bauer does not have one and he
seems to have one of everything the Germans made.

The set is supposed to work on 220 or 110 volts. The plug fits our
standard US 110 (120) volt sockets. There is no change over switch so it
must have some sort of a voltage sensing system or you may have to have
it rewired by local technician. Seems to feed the output to several
selenium rectifiers. It does have an on/off switch.

The previous owner claimed to have powered it up and loaded it into a
dummy antenna despite the fact there is no antenna connection as such.
It also looks like someone in the USA has rebuilt it a time or two as
some of the capacitors are non German.  Two holes in the front panel,
one for some sort of neon ? glow lamp, which is probably an on/off
indicator. Second hole which seems to be on the output side? held a
meter. I was able to get a WW II German ma meter. There were two loose
wires behind the meter which I assume were connected to the original
meter. There was a US made object connected to one of the wires and I
think it was a capacitor.

The set works from either the Maus key, a hand mike, a field telephone
handset or the standard German throat mike.  There are three tubes, and
I assume one is a modulator, one an oscillator, and the third a power
amplifier ?.  It also looks like when the set was designed they had
planned to use the large transmitting tubes that are in all their
transmitters but before it was produced, they switched to the small
tubes used in their aircraft sets. This observation is based on the
large space for the tubes.

There are two male plugs on the back side which someone has labeled in
pencil "Antenna".  It requires a female plug which I am told is very
hard to find and was standard on all Luftwaffe equipment.

I have not had time to do much circuit tracing due to a ceiling collapse
and roof replacement and several other sets ahead of it.

If any one has a circuit or any information on the WW II German F 42
transmitter, I would like to get a copy.

Bill Howard