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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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Old 19th Sep 2023, 5:41 pm   #1
David Simpson
Join Date: Mar 2008
Location: Aberdeen, UK.
Posts: 2,785
Default B4 Plug-in Coils

Does anyone recognise these plug-in coils, please? The two shiny bakelite ones are made by "Energo", and the r/h ebonite one is un-named.
Had a quick lewk through "Radio Radio" & Tickling the Crystal" bewks, but nothing pops up. Maybe something out of a Scott-Taggart book.

Regards, David
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Old 19th Sep 2023, 7:39 pm   #2
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,018
Default Re: B4 Plug-in Coils

Hi David, try early WW, AW etc adverts and you may get lucky

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Old 25th Sep 2023, 12:18 pm   #3
Mr Moose
Join Date: Jul 2008
Location: Gloucestershire, UK.
Posts: 1,039
Default Re: B4 Plug-in Coils

I think that they may be 1920s HF transformers used for coupling in sets with one or more HF stages.
The two marked ones would probably have been tuned with a tuning capacitor.
The unmarked one could be a home-wound one as you could buy the formers to wind yourself.
Yours, Richard
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