AVO Multimeter survey

[millwright2309]

Originally Posted by Superscope

Dating Multiminors has always been a bit of a problem, and has been a pain for the Survey.
Made even more difficult when it came to light recently that Avo supplied replacement
Mk 5 Movements and Scaleplates for repairs to older Mk's.

Meaning a Multiminor displaying Mk 5 on its Scaleplate is not necessarily a Mk 5 and
other features might be required to actually identify what it is.
One assumes this could also have been the case previously with other Mk's.

Now, very little is cast in Stone with Avo meters as everybody knows, but is it possible that
Universal Instrument Services supplied the Multiminor Second Hand?
The reason I ask, is that it is unlikely (but not impossible of course) the Multiminor was still
being made or supplied in 1979.
The Multiminor was replaced around 1970 by the 70 Series Meters.
It could of course also have been sitting on a Shelf for years and sold as NOS.

Your Meter as you probably know will be a Mk II from 1953.
By square Batteries, I assume you mean the Two 4.5v Cycle Batteries, or do you mean the
single 1.5v Battery?

As a general rule.

Values of course will depend on it's condition and supplied accessories.
I'm not sure what the values are for Canada, but for the Uk, If its scruffy with chips and
scratches and doesn't work at all, then it has very little value.
You would struggle to get £10 for it here in the Uk for spares.

If it is in very good cosmetic condition with a Case and leads (even with missing Prods) and
it at least shows signs of life, you might be lucky and get around £25-£30.
Although I don't often see Model 7's get that high unless they really are in good shape.

The Model 7 for some reason is not a particularly sort after Avometer and that reflects in the
price.

Some photos would help to gauge general condition.



Ian

It has the square 1.5 volt battery.

[The Philpott]

Avominor Protimeter s/n- 545-558 !

How many do we know of now....would it be 6 including the ghastly steampunked one that featured on etsy some time ago?

I'll start a separate thread with images.

Dave

[Superscope]

Originally Posted by The Philpott

Avominor Protimeter s/n- 545-558 !

How many do we know of now....would it be 6 including the ghastly steampunked one that featured on etsy some time ago?

I'll start a separate thread with images.

Dave

Yes, it is indeed the sixth one we have listed, including the butchered, sorry, Steampunked etsy one.

One assumes this one is probably towards the end of production.


Although we have Six listed, it is not clear if these all actually still survive.

Two of the numbers were provided by Andy Gillham from Avo and I'm not sure if these
were surviving Meters or just happened to appear on historical documentation.



Ian

[millwright2309]

My model 7 and a Hoyt AC/DC volt meter.

[millwright2309]

The batteries that were in my model 7, bought in August this year 40632-A-353, AC/DC seems to be working well.

[The Philpott]

Wow! I believe that sulphur fumes from the rotting rubber test leads can blacken the switch contacts inside the avo, so best kept separate! Does the AVO 7 have a serial number at the bottom of the scaleplate?

Dave

[millwright2309]

40632-a-353

[bobbob!]

AVO Multiminor Mk. 5 : 014205

[Chrispy57]

Avo EM272, part number 5170-425, serial number 175771.

Sadly this faulty unit has been steampunked (sensitively I hope) into a Zener diode tester, as described in a post under the Homebrew Equipment section of the Forum!

Cheers
Chris

[Nickthedentist]

Just taken possession of:

AVO Model 8, Mk II.

Serial No: 114874-C-1160.

Thanks for letting me have it, Glyn.