|
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. |
|
Thread Tools |
14th Jul 2015, 11:13 am | #1 |
Nonode
Join Date: Jul 2005
Location: Hull, East Yorkshire, UK.
Posts: 2,083
|
Coil Formers
I have a pair of Coil Formers. They were sold as Eddystone, but are un-marked.
There are six pins, which do not correspond with an Octal valve base. They are a larger diameter circle and the pins are thicker. To use these I am going to need something to plug them into. I don't know their age, so I don't know if the 'right thing' would be for screw fit to a baseboard or into a punched chassis hole. |
14th Jul 2015, 4:39 pm | #2 |
Hexode
Join Date: May 2005
Location: Wigan, Greater Manchester, UK.
Posts: 479
|
Re: Coil Formers
Except for missing pin1, it looks like it could plug into a B7 valve base.
Last edited by Alf; 14th Jul 2015 at 4:45 pm. |
14th Jul 2015, 9:04 pm | #3 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,171
|
Re: Coil Formers
Hi Neil, it may be possible to get insulated sockets for these depending on the pin diameter.
In use they were often plugged into simple turned brass sockets that were fitted into the ebonite baseboard. Do you have access to a lathe? Ed |
14th Jul 2015, 10:22 pm | #4 |
Dekatron
Join Date: Jan 2012
Location: Brentwood, Essex, UK.
Posts: 5,316
|
Re: Coil Formers
Similar coil formers (plain as yours evidently originally were, or threaded at 14 tpi), various made-up coils wound on the formers, and two different types of socket for them, are illustrated in the 1938 Eddystone Short Wave Components Catalogue: PDF extract attached. Possibly yours pre-date 1938 as they have straight split contact pins rather than the helically slotted pins of the 1938 versions.
Last edited by emeritus; 14th Jul 2015 at 10:36 pm. |