Bottlehead Forum

General Category => General Discussion => Topic started by: JamieMcC on September 16, 2016, 10:47:06 AM

Title: What is it?
Post by: JamieMcC on September 16, 2016, 10:47:06 AM

Does anyone know what this is? It was about to thrown in the skip with a load of other old electrical bits and pieces it looked interesting.

Title: Re: What is it?
Post by: 2Bornot2B on September 16, 2016, 10:55:27 AM

Looks like a Wheatstone Bridge from high school physics.

Title: Re: What is it?
Post by: Adrian on September 16, 2016, 12:55:08 PM

http://www.curiousminds.co.uk/Instruments/used_vintage/potentiometer-two-metres-vintage-curious-minds- (http://www.curiousminds.co.uk/Instruments/used_vintage/potentiometer-two-metres-vintage-curious-minds-)

Title: Re: What is it?
Post by: JamieMcC on September 17, 2016, 02:37:00 AM

Perfect thanks the makers name plate on it is even the same "Philip Harris".

Title: Re: What is it?
Post by: howardnair on September 17, 2016, 10:09:22 AM

Well now that we know what it is. Are you going to hook it up to something. I would be tempted just for fun

Title: Re: What is it?
Post by: RayP on September 19, 2016, 12:24:03 PM

What resistance is it and how much power do you think it could take?

ray

Title: Re: What is it?
Post by: Adrian on September 20, 2016, 03:23:30 PM

resistance and power rating?
It is advertised to contain 24 standard wire gage Constantan alloy.
Here's a start on its properties https://en.wikipedia.org/wiki/Constantan (https://en.wikipedia.org/wiki/Constantan).
This alloy is normally found in thermacouples but can also be used in wire wound resistors IIRC (simular to nichrome wire).
I'm sure you can find out much more about with a little google curiosity.

Title: Re: What is it?
Post by: RayP on September 21, 2016, 08:06:06 PM

http://www.iecpl.com.au/site/prod_det.php?recordID=4794-001 (http://www.iecpl.com.au/site/prod_det.php?recordID=4794-001)

So 1.99 ohms per meter. I'm struggling to think of a use for the device.

ray