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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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22nd Jun 2018, 12:35 am | #1 |
Hexode
Join Date: Oct 2017
Location: Manchester, UK.
Posts: 363
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Unusual tuning condenser.
Another unusual component I have had for a number of years. A POLAR MICROMETER CONDENSER.Pics attached.Does anyone know anything about it?.
Last edited by radiograham; 22nd Jun 2018 at 12:36 am. Reason: Another photo |
22nd Jun 2018, 12:42 am | #2 |
Hexode
Join Date: Oct 2017
Location: Manchester, UK.
Posts: 363
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Re: Unusual tuning condenser.
Another pic.
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22nd Jun 2018, 3:35 am | #3 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,902
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Re: Unusual tuning condenser.
Micrometer drives are often found as part of adjusters for waveguide and cavity filters.
I've got some Moore and Wright ones with about a 50mm diameter micrometer barrel which once positioned plungers into a waveguide device. David
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22nd Jun 2018, 8:43 am | #4 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Unusual tuning condenser.
Hi, I have a few of these. I believe they were used on early sets to adjust neutralisation in the triode RF stages.
Probably only a few pF in value. Ed |
22nd Jun 2018, 10:26 pm | #5 |
Hexode
Join Date: Oct 2017
Location: Manchester, UK.
Posts: 363
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Re: Unusual tuning condenser.
HI I thought something along those lines,They were found with a few readyradio swinging coil holders and vintage rheostats in Wales a good number of years ago. Graham.
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