Valve base ID - UK Vintage Radio Repair and Restoration Discussion Forum

jonmiller · 24th Nov 2015, 8:52 am

Hello
Does any body know what these bases are for?

Many thanks

n_r_muir · 24th Nov 2015, 9:15 am

hi,

there is an American 4 pin UX4, aEuropean F8 and the other one is probably a CRT base.

llama · 24th Nov 2015, 9:16 am

12 hole one for a 1950s/'60s CRT
4 hole one looks like UX4. One use was power connector for an HRO (from memory) as well as some (mainly pre-war) US valves
Other - dunno.

2 out of 3 ain't bad
Graham

FERNSEH · 24th Nov 2015, 4:09 pm

The eight pin socket is the German Y8A type.
Here's an example, the EF12 pentode, Stahl rohre. There was also a ten pin socket, the Y10A.
http://www.r-type.org/exhib/aaa1398.htm

The twelve pin socket is the duodecal base used on CRTs such as the MW31-74 and many other 1950s CR tubes.

The four pin socket is the type used on common rectifier tubes such as the type 80.

DFWB.

24th Nov 2015, 8:52 am	#1
jonmiller Pentode Join Date: Mar 2009 Location: Worcester, Worcestershire, UK. Posts: 241	Valve base ID Hello Does any body know what these bases are for? Many thanks Attached Thumbnails

24th Nov 2015, 9:15 am	#2
n_r_muir Hexode Join Date: Jul 2007 Location: Edinburgh, UK. Posts: 344	Re: Valve base ID hi, there is an American 4 pin UX4, aEuropean F8 and the other one is probably a CRT base.

24th Nov 2015, 9:16 am	#3
llama Octode Join Date: Jun 2006 Location: St Osyth, Nr Clacton, Essex, UK. Posts: 1,482	Re: Valve base ID 12 hole one for a 1950s/'60s CRT 4 hole one looks like UX4. One use was power connector for an HRO (from memory) as well as some (mainly pre-war) US valves Other - dunno. 2 out of 3 ain't bad Graham __________________ Half my stuff is junk - trouble is, I don't know which half!

24th Nov 2015, 4:09 pm	#4
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: Valve base ID The eight pin socket is the German Y8A type. Here's an example, the EF12 pentode, Stahl rohre. There was also a ten pin socket, the Y10A. http://www.r-type.org/exhib/aaa1398.htm The twelve pin socket is the duodecal base used on CRTs such as the MW31-74 and many other 1950s CR tubes. The four pin socket is the type used on common rectifier tubes such as the type 80. DFWB.