Eminent Test Unit

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At almost any single period during the years 1970-1985 there were over 45 brands of new electronic organs on the UK market: Between them they managed to produce, 183 models under £1000, 137 models between £1000 & £2000 and 201 models over £2000+

Eminent Test Unit

Postby Bernard » 24 Aug 2015 07:53

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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Bernard
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Re: Eminent Test Unit

Postby Rev Tony Newnham » 24 Aug 2015 09:31

Hi

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

Every Blessing

Tony
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Rev Tony Newnham
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Re: Eminent Test Unit

Postby Bernard » 24 Aug 2015 11:51

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.
Bernard
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Posts: 44
Joined: 16 Oct 2014 13:49

Re: Eminent Test Unit

Postby Rev Tony Newnham » 25 Aug 2015 09:58

Hi

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

Every Blessing

Tony
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Rev Tony Newnham
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Location: Rugby


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