Can anyone identify/specify my ECM Compspeed?

Tony Cleather
Posts: 9
Joined: Fri Oct 03, 2008 9:57 am

Can anyone identify/specify my ECM Compspeed?

Postby Tony Cleather » Sat Aug 24, 2013 11:49 am

My transformer which supplies my old ECM Compspeed controller has just failed and I must replace it. The problem is: does my Compspeed require an AC input (16V?) or a 12V DC input? I cannot tell from either component, both of which were bought years ago. The Compspeed is mounted on my home-made panel in such a way that I cannot turn it upside down to see if there is a data plate which could help. The image below shows the front face of the unit but it does not carry a model number or spec at all.

The transformer I think was from Danbury Electronics and appears to show a 16V output but without specifying AC or DC.

So, does my Compspeed include a rectifier such that 16V AC would be the correct input; or do I need a transformer with a rectified 12V DC output?

As a secondary point, can anyone suggest why the transformer might have failed?

Any help on this will be much appreciated.
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Ian Everett
Posts: 379
Joined: Tue Jul 21, 2009 9:43 pm

Re: Can anyone identify/specify my ECM Compspeed?

Postby Ian Everett » Sat Aug 24, 2013 12:38 pm

My Compspeed Rambler Minors require 16V AC and I would suspect yours will be similar.

Re the transformer - check the obvious, such as fuse, terminations of wires in the plug etc. then if it still is a failure check whether you have a degree in electrical engineering.

If you find you haven't, chuck it out.

If you find you have, still chuck it out - it's not worth your time. :)

Ian

nigelcliffe
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Joined: Mon Jul 21, 2008 8:31 am

Re: Can anyone identify/specify my ECM Compspeed?

Postby nigelcliffe » Sat Aug 24, 2013 1:12 pm

From what Tony said, I'd expect 16v AC.
Use of AC input was the normal arrangement when the Compspeeds were made, and a 16v AC output transformer is a very standard device of the period.
It would be possible to trace the circuit on the Compspeed to see if a rectifier was the first component.

- Nigel

Alan Turner
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Joined: Sun Jul 20, 2008 4:24 pm

Re: Can anyone identify/specify my ECM Compspeed?

Postby Alan Turner » Sat Aug 24, 2013 2:26 pm

What you have is a Compspeed F.

On the heat shield that should be on the back of the conroller is:
scan0011.jpg


regards

Alan
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ginger61
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Joined: Wed Jan 30, 2013 4:00 pm

Re: Can anyone identify/specify my ECM Compspeed?

Postby ginger61 » Sat Aug 24, 2013 7:22 pm

Hi. It is definately a compspeed as I still have one and occasionally gets used!!!!
I power mine with a Gaugemaster M1 cased transformer which has 2 outputs of 16v but only 1amp.
Hope that helps,
Nick.

Tony Cleather
Posts: 9
Joined: Fri Oct 03, 2008 9:57 am

Re: Can anyone identify/specify my ECM Compspeed?

Postby Tony Cleather » Sun Aug 25, 2013 10:29 am

Thanks everyone for your quick responses; problem solved I think!

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Ian Everett
Posts: 379
Joined: Tue Jul 21, 2009 9:43 pm

Re: Can anyone identify/specify my ECM Compspeed?

Postby Ian Everett » Sun Aug 25, 2013 11:23 am

16 volts or 14 - 18 volts.

What's a Voldemort between friends on Hogwort Railways? :lol:

(Sorry!)
Ian


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