Not much luck on abpr, so I'll try it here. Got this on ebay just for
the fun of it, pics on binary under whatzitfor. It's a Signal Corps
Frequency Meter type BC-153, 75 to 1500kc. It consists of a large tuning
cap and three coils that are switched in series to get three different
bands, 75-225kc, 200-700kc and 600-1600kc. These form a tank circuit
with a meter in series with the tuning cap and coil. It also has an
adjustable buzzer feeding the top of the tank, and a battery for the
buzzer. I figure you set the buzzer going and pick up the freq you want
with the tuning. Someone has put a dc voltmeter in place of the original
one, probably was an ac ammeter, which shows the internal tank current,
a power indicator probably? There are no external connections except to
add more inductance for a lower resonance. My guess is, this tank
circuit radiated the resonant frequency to be picked up by a receiver,
like a sig gen. Any guesses out there, and what type meter might have
been used? I think this might be early 30's. Any info available? Ken

Its an absorbtion/field strength meter for LF beacons and similar
transmitters. It does not radiate, per se.

Ken wrote:
Not much luck on abpr, so I'll try it here. Got this on ebay just for
the fun of it, pics on binary under whatzitfor. It's a Signal Corps
Frequency Meter type BC-153, 75 to 1500kc.

K3HVG wrote:

Its an absorbtion/field strength meter for LF beacons and similar
transmitters. It does not radiate, per se.

Ken wrote:

Not much luck on abpr, so I'll try it here. Got this on ebay just for
the fun of it, pics on binary under whatzitfor. It's a Signal Corps
Frequency Meter type BC-153, 75 to 1500kc.


Also known as a Wave Meter. With a buzzer it is a low power "spark"
transmitter.

Bill K7NOM

So it can either generate or receive it's resonant freq? What value
current meter would have been used in the tank, I assume it's ac? Ken

Bill Janssen wrote:

K3HVG wrote:

Its an absorbtion/field strength meter for LF beacons and similar
transmitters. It does not radiate, per se.

Ken wrote:

Not much luck on abpr, so I'll try it here. Got this on ebay just for
the fun of it, pics on binary under whatzitfor. It's a Signal Corps
Frequency Meter type BC-153, 75 to 1500kc.



Also known as a Wave Meter. With a buzzer it is a low power "spark"
transmitter.

Bill K7NOM