Asking for any and all info on this unit please

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abwdvm
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Asking for any and all info on this unit please

Post by abwdvm » Mon Feb 08, 2016 11:55 am

https://www.dropbox.com/s/4dcy1d6pi7fc3j0/Reg.jpg?dl=0

This is connected after a breaker, and before the 'Rack". We all assumed this protected the transmitter, and it may have when the old transmitter was used. Now it is connected to the equipment in rack in engineering. Orban 9200, DA, Computers, EBS etc.

1) Do we need this?
2) Anyone have a manual for this?
3 Would it be better used protecting the transmitter?
technician at an 1000w AM station in Texas

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PID_Stop
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Re: Asking for any and all info on this unit please

Post by PID_Stop » Mon Feb 08, 2016 1:05 pm

That resembles the motor-driven variac that used to feed our control room equipment; its purpose is not so much to protect the equipment as to stabilize the voltage. We bought ours back when we were located in a shopping mall, and the raw power would vary enormously depending on when the stores were open or closed. During the day it pretty much just sat there, but after 9pm you'd hear it periodically coming to life, dialing back the voltage as the stores shut down.

It was no good at killing noise or spikes -- our early Telemation character generator had a Sola ferroresonant transformer to help with that -- but for controlling longer-term variation it was excellent.

-- Jeff

abwdvm
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Re: Asking for any and all info on this unit please

Post by abwdvm » Mon Feb 08, 2016 4:13 pm

Another pic

https://www.dropbox.com/s/ids9h1nfee99lhc/reg1.jpg?dl=0

Once I turned it on, it makes clicks, etc, and the voltage moves slightly back and forth with changing loads. Looks like nothing is connected to LINE C, and Line A seems broken as all it does is click, and no voltage change is registered.
technician at an 1000w AM station in Texas

ChuckG
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Re: Asking for any and all info on this unit please

Post by ChuckG » Mon Feb 08, 2016 6:34 pm

Superior Electric Stabiline. It's exactly what Jeff said it was, a voltage regulator. It uses a Tube type comparator driving thyratrons that in turn operate the relays that control the reversible motor variacs. They don't do anything for quick spikes or sags nor do they offer surge protection.
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Chuck Gennaro
Central Wisconsin

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