Battery Eliminator for AVO 8?

snipped-for-privacy@o2.co.uk formulated on Friday :

I think the usual way to solve it, is a series of button cells made up into a suitable battery.

Batteries are available on Ebay for about six quid inc postage.

you can wire two 9 volt PP3 batteries in series with a 5v zener diode, insulate the metal cases and slide them in sideways between the contacts for the correct battery.

AVO VC1 eliminator

See also this for making a battery

I have a feeling at least five years ago you could still get those batteries but they were not cheap and some make like saft.

Brian

Having had a quick look online, it?s only used for high resistance range. Which I?m not bothered about.

However, I can?t zero the Ohms ranges.

Perhaps the 1.5 V battery is past its best after all.

It's only a D cell. Not expensive!

I got a 15v battery off eBay, and it works fine.

Yes, I will replace the D cell, but as the 15V only seems to do stuff I?m unlikely to be interested in, I will pass on that.

My thoughts are an AVO which needed a mains supply rather pointless. Given you can buy far more accurate bench top mains powered units for not a lot, if it's only ever going to be used where you can plug it in.

AVO batteries last a long time. The 1.5v cell is cheap. The 15v once can be made up from button cells.

I've just put 7 AVOs on a shelf in the lab, 3 upside down as they look better like that as smiley meters :-)