Avo transistor tester. What batteries do I need? - UK Vintage Radio Repair and Restoration Discussion Forum

zooterman · 21st Nov 2010, 7:27 pm

Hi All.
Can anyone tell me what batteries I need for an Avo transistor tester.
Thanks.

Dekatron · 21st Nov 2010, 9:29 pm

Hi,

In the old AVO CT446 transistor tester the batteries are called U10 batteries, you can for instance find replacement batteries here: http://www.smallbattery.company.org.uk/sbc_u10.htm

In the more modern AVO CT166 & CT167 you can use standard 9V batteries but you will most probably need to make new battery connectors as they used PP7 or PP9 batteries with a wider spacing of the electrodes, some of these testers come with single electrodes which you can fit, although it will be tight, on a standard 9v battery. They can be found at the same source as above.

I do not have any connection to the source mentioned above and I do not know anything about them, I only know that they are a good source of finding information on old batteries and replacement types!

21st Nov 2010, 7:27 pm	#1
zooterman Retired Dormant Member Join Date: Jan 2007 Location: Lampeter, Dyfed, Wales, UK. Posts: 369	Avo transistor tester. What batteries do I need? Hi All. Can anyone tell me what batteries I need for an Avo transistor tester. Thanks.

21st Nov 2010, 9:29 pm	#2
Dekatron Octode Join Date: May 2009 Location: Linkoping, Sweden Posts: 1,465	Re: Avo transistor tester. What batteries do I need? Hi, In the old AVO CT446 transistor tester the batteries are called U10 batteries, you can for instance find replacement batteries here: http://www.smallbattery.company.org.uk/sbc_u10.htm In the more modern AVO CT166 & CT167 you can use standard 9V batteries but you will most probably need to make new battery connectors as they used PP7 or PP9 batteries with a wider spacing of the electrodes, some of these testers come with single electrodes which you can fit, although it will be tight, on a standard 9v battery. They can be found at the same source as above. I do not have any connection to the source mentioned above and I do not know anything about them, I only know that they are a good source of finding information on old batteries and replacement types! __________________ Martin, Sweden