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Components and Circuits For discussions about component types, alternatives and availability, circuit configurations and modifications etc. Discussions here should be of a general nature and not about specific sets. |
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26th Nov 2021, 5:35 pm | #1 |
Dekatron
Join Date: Dec 2004
Location: East Yorkshire, UK.
Posts: 3,988
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What is this ?
Single coil of 18swg DCC wire measuring 0.3R Only has one fixing point that I can see, where the wires come out.
John.
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26th Nov 2021, 6:44 pm | #2 |
Tetrode
Join Date: Sep 2020
Location: Lewes, East Sussex, UK.
Posts: 66
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Re: What is this ?
Looks like school physics apparatus to me. It's presumably held vertically so that you can use one of those small plotting compasses to trace magnetic lines of force through the bore of the coil.
Best wishes Des |
26th Nov 2021, 7:36 pm | #3 |
Dekatron
Join Date: Dec 2004
Location: East Yorkshire, UK.
Posts: 3,988
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Re: What is this ?
Hi Des, I did wonder if it was part of a schools Galvanometer. Or DF because it has a copper screen? covering the windings.
John.
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My favourite text message "I'll be there in five minutes, if not read again" |
26th Nov 2021, 9:20 pm | #4 |
Dekatron
Join Date: Feb 2003
Location: Cottingham, East Yorkshire, UK.
Posts: 5,765
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Re: What is this ?
I don't know what it was, but I know what it would be ideal for!
The RF alignment instructions for the Bush DAC90A (for example), calls for a single loop of wire - 8" - 10" to be placed near to the frame aerial. I've attached a clip from the Bush Datasheet below. Just a loop of wire clipped to the tip and ground of the signal generator output lead would do, but I made my own loop, with a little stand. The alignment instructions also call for a 'sensitive output meter' as a visual indicator'. I made Paul Stenning's neat simple little output meter - ideal for that purpose, but irrelevant to this thread.
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David. BVWS Member. G-QRP Club member 1339. |
26th Nov 2021, 9:22 pm | #5 |
Banned
Join Date: Jun 2015
Location: Mareeba, North Queensland, Australia
Posts: 2,704
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Re: What is this ?
I think its a screened search coil for a metal detector. I made many over the years and this looks like a screened version.
Joe |