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**Reel Slots** Gaming Machines => Bally Electromechanical => Topic started by: David Walz on July 05, 2023, 02:43:13 PM

Title: Bally manufactured voltmeter.
Post by: David Walz on July 05, 2023, 02:43:13 PM

Today I purchased a Bally voltmeter 10, 50, 150 . I don't know if it works, however it seems pretty straightforward. I've rebuilt old tube radio's and I shouldn't have much trouble getting this operational if it needs work.

Anyone with any information about this tester, paperwork, diagram, etc. please let me know. Thanks.

Title: Re: Bally manufactured voltmeter.
Post by: wolftalk on July 06, 2023, 09:43:16 PM

looking at the multiple jacks for voltage ranges, you'd suspect there's nothing in there besides the gauge and a few resistors.

if ya open it up, please post pics of the inside.

Title: Re: Bally manufactured voltmeter.
Post by: David Walz on July 06, 2023, 11:37:24 PM

Quote from: wolftalk on July 06, 2023, 09:43:16 PM

looking at the multiple jacks for voltage ranges, you'd suspect there's nothing in there besides the gauge and a few resistors.

if ya open it up, please post pics of the inside.

That's my first order of business, open it up and see if it needs repairs.

Title: Re: Bally manufactured voltmeter.
Post by: David Walz on July 11, 2023, 03:02:18 PM

More photo's...

Title: Re: Bally manufactured voltmeter.
Post by: David Walz on July 11, 2023, 03:03:31 PM

More photo's.

Title: Re: Bally manufactured voltmeter.
Post by: David Walz on July 12, 2023, 06:22:19 AM

Quote from: wolftalk on July 06, 2023, 09:43:16 PM

looking at the multiple jacks for voltage ranges, you'd suspect there's nothing in there besides the gauge and a few resistors.

if ya open it up, please post pics of the inside.

Emailed you some photo's.

Title: Re: Bally manufactured voltmeter.
Post by: wolftalk on July 12, 2023, 10:12:34 AM

looks like a hand-wound resistor in series to the 150V jack.  Maybe they couldn't get a standard resistor in the value they needed or that's how they compensated for the 2% tolerance of the resistor to calibrate the device.

Title: Re: Bally manufactured voltmeter.
Post by: David Walz on July 12, 2023, 02:10:53 PM

Quote from: wolftalk on July 12, 2023, 10:12:34 AM

looks like a hand-wound resistor in series to the 150V jack.  Maybe they couldn't get a standard resistor in the value they needed or that's how they compensated for the 2% tolerance of the resistor to calibrate the device.

One good thing about resistors, they are like the Energizer Bunny, keeps going indefinitely.