Identfication required: Vintage Octal Adapter - UK Vintage Radio Repair and Restoration Discussion Forum

radiozero · 9th Jul 2018, 1:37 pm

Hi. Can someone please identify this octal adapter and what it would be used for? Thanks.

Herald1360 · 9th Jul 2018, 2:14 pm

Maybe if the two sockets go to pins 2 and 7 it's to access heater volts?

Otherwise someone will need actually to recognise it!

vidjoman · 9th Jul 2018, 7:13 pm

Have you checked which pins are connected to the two on the top?. Also check if any other pins on the octal end are shorted. Many jukebox and other amps used the speaker plug to short the centre tap of the HT transformer winding to earth to remove the HT to protect the o/p transformer if the speaker plug was removed.

M0FYA Andy · 9th Jul 2018, 9:00 pm

I'd be tempted to unscrew the screws and have a look inside!

Andy

ms660 · 9th Jul 2018, 9:11 pm

Xtal socket?

Lawrence.

Refugee · 9th Jul 2018, 9:18 pm

Go for it with a continuity buzzer before you bother with opening it up.
It looks pristine.

FrankB · 16th Jul 2018, 10:01 am

It looks identical to some of the oddball sockets I got with a used Digital readout Chinese Tube Tester. The set of adaptor sockets came in a beautiful wood case.

9th Jul 2018, 1:37 pm	#1
radiozero Hexode Join Date: Mar 2008 Location: Wakefield, West Yorkshire, UK. Posts: 444	Identfication required: Vintage Octal Adapter Hi. Can someone please identify this octal adapter and what it would be used for? Thanks. Attached Thumbnails

9th Jul 2018, 2:14 pm	#2
Herald1360 Dekatron Join Date: Feb 2007 Location: Leominster, Herefordshire, UK. Posts: 16,535	Re: Identfication required: Vintage Octal Adapter Maybe if the two sockets go to pins 2 and 7 it's to access heater volts? Otherwise someone will need actually to recognise it! __________________ ....__________ ....\|____\|\|__\|__\_____ .=.\| _---\__\|__\|_---_\|. .........O..Chris....O

9th Jul 2018, 7:13 pm	#3
vidjoman Dekatron Join Date: Jun 2013 Location: East Sussex, UK. Posts: 3,326	Re: Identfication required: Vintage Octal Adapter Have you checked which pins are connected to the two on the top?. Also check if any other pins on the octal end are shorted. Many jukebox and other amps used the speaker plug to short the centre tap of the HT transformer winding to earth to remove the HT to protect the o/p transformer if the speaker plug was removed.

9th Jul 2018, 9:00 pm	#4
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: Identfication required: Vintage Octal Adapter I'd be tempted to unscrew the screws and have a look inside! Andy

9th Jul 2018, 9:11 pm	#5
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Identfication required: Vintage Octal Adapter Xtal socket? Lawrence.

9th Jul 2018, 9:18 pm	#6
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,553	Re: Identfication required: Vintage Octal Adapter Go for it with a continuity buzzer before you bother with opening it up. It looks pristine.

16th Jul 2018, 10:01 am	#7
FrankB Heptode Join Date: Oct 2005 Location: Olympia, Washington, USA. Posts: 664	Re: Identfication required: Vintage Octal Adapter It looks identical to some of the oddball sockets I got with a used Digital readout Chinese Tube Tester. The set of adaptor sockets came in a beautiful wood case.