What do you use a Phaostron for?

[Leggs]

Anybody know what a Phaostron is used for? I found one in my Pop's Shop that I'm cleaning out.

 

[Don_Burke]

Phaostron is a manufacturer.

Avionics, Aircraft Instruments, Meters, Sensors, Transmitters, by: Phaostron

 

[jimvm]

Looks like a Field Strength Meter 'FSM' to me.

 

[kb2vxa]

Another home brew in a Budd mini box. I tend to agree, looks like a relative field strength meter using a surplus 100uA full scale DC meter so it's pretty sensitive.