1950s C.G. Conn Strobotuner Piano Tuner

[Electronic M]

That was probably a service instrument for tuning their electronic organs.

[Captainclock]

Originally Posted by Electronic M

That was probably a service instrument for tuning their electronic organs.

Could of been as well it does have a 1/4" input jack on the front and a single RCA jack on the back for a speaker to be hooked up for an audible pitch tone to be put out so you can hear the note you're tuning (kind of like an electronic tuning fork or pitch pipe) although the reason why I think this might of been used for instruments like the piano or even band instruments is because it came to me with a Radio Shack/Realistic floor mic attached to the unit which would tell me that it was being used at one time to tune acoustical instruments and not just electronic instruments. I did noticed though that the 2 neon bulbs in the unit will eventually need to be replaced because they aren't glowing as bright as they should be, with very little neon glow left around the cathode of the neon bulbs.

[Ed in Tx]

When I was in the school band in Jr. High and High school back in the previous century 1964-'69, there was one of those in the band hall to help keep everyone in tune.

[dieseljeep]

Originally Posted by Captainclock

Could of been as well it does have a 1/4" input jack on the front and a single RCA jack on the back for a speaker to be hooked up for an audible pitch tone to be put out so you can hear the note you're tuning (kind of like an electronic tuning fork or pitch pipe) although the reason why I think this might of been used for instruments like the piano or even band instruments is because it came to me with a Radio Shack/Realistic floor mic attached to the unit which would tell me that it was being used at one time to tune acoustical instruments and not just electronic instruments. I did noticed though that the 2 neon bulbs in the unit will eventually need to be replaced because they aren't glowing as bright as they should be, with very little neon glow left around the cathode of the neon bulbs.

If the neon lamps are on the inside, they might be used as a voltage regulator or a simple tone generator.

[rca2000]

how do you USE the thing?

[Ed in Tx]

Originally Posted by Captainclock

Could of been as well it does have a 1/4" input jack on the front and a single RCA jack on the back for a speaker to be hooked up for an audible pitch tone...

Originally Posted by rca2000

how do you USE the thing?

You should take a look on YouTube to see how these work.