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 Post subject: Eminent Test Unit
PostPosted: 24 Aug 2015 06:53 
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Joined: 16 Oct 2014 12:49
Posts: 46
My last purchase: an instrument where - in the early days - repairers
could find where an error was located in an organ. This instrument was made
by Eminent itself. I don't know how many Test Units were made but this instrument
is unique without a doubt. Again something vintage for my collection…

Bernard.

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 Post subject: Re: Eminent Test Unit
PostPosted: 24 Aug 2015 08:31 
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Joined: 16 Dec 2012 16:08
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Location: Rugby
Hi

Interesting - have you got any info on what the various buttons do?

Every Blessing

Tony


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 Post subject: Re: Eminent Test Unit
PostPosted: 24 Aug 2015 10:51 
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Joined: 16 Oct 2014 12:49
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Hi Tony,

The unit includes a tone generator, a listening amplifier, a noise meter etc.
A voltmeter is not missing.
The test unit could do all sorts of measurements in the organ so that certain errors could be located.

It contains:
- A signal generator (with various waveforms);
- A signal follower (with adjustable volume);
- A DC voltmeter (polarity change).

The brass tip of the probe is to press, and then the amplified signal by a factor of 10.

On the Eminent schemas are all the test points indicated neat.
At some points you measure voltage (+ or -).
At some points you need to add a signal and something commissioning.
At some points you need to pick up a signal and listen.

The 8 knobs (picture 3) were also used in the Eminent 2000/2500 Grand Theatre organs.

The tester is performed in a specially customized carrying case in simulated leather.

==========

I hope the text is a little bit clear. I've been using Google Translate… (Dutch to English).

Greetings from Bernard.


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 Post subject: Re: Eminent Test Unit
PostPosted: 25 Aug 2015 08:58 
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Joined: 16 Dec 2012 16:08
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Location: Rugby
Hi

Thanks. Looks an interesting & potentially useful piece of kit for analogue organ maintenance.

Every Blessing

Tony


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