Time for a game...

G

Geordie Spark

• Sep 22, 2012

• #2

You may as well just give Tony his 2 points now. :wink_smile:

 

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HandySparks

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• Sep 22, 2012

• #3

OK, a stab in the dark. How about an AVO meter for blind people? Though how they'd read it, or why they would want one, I don't know.

 

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telectrix

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• Sep 22, 2012

• #4

it's an avo, obviously, think it's a model 8 modified. was it a blue peter project?

 

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Des 56

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• Sep 22, 2012

• #5

My stab in the dark
#Its not shown here The Museum of Technology, the Great War and WWII" where most extra old meters are found,so

Its a prototype universal avometer :hurray:

Good post by the way,so I'm going to give you a like because I likes

 

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Brightspark2

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• Sep 22, 2012

• #6

It isnt a modified AVO meter nor is it a prototype. This was wasnt a one off although I'm not sure how many where actually made but this was available to buy.

 

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Brightspark2

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• Sep 22, 2012

• #7

Des 56 said:

My stab in the dark
#Its not shown here The Museum of Technology, the Great War and WWII" where most extra old meters are found,so

Its a prototype universal avometer :hurray:

Good post by the way,so I'm going to give you a like because I likes

Click to expand...

ha ha thank you

Although it wont be in the musuem becuase unfortunately there are none in existance, that are known of anyway.


I'll keep this going for a bit yet before I give the answers...

 

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ackbarthestar

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• Sep 22, 2012

• #8

Here's my shot......Its AVO's journey into 50V high current AC Ohmmeter. used for stressing conduit joints

 

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Guest123

• Sep 22, 2012

• #9

Avo series 1???

 

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telectrix

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• Sep 22, 2012

• #10

avo's venture into pregnancy testing?

 

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Brightspark2

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• Sep 22, 2012

• #11

telectrix said:

avo's venture into pregnancy testing?

Click to expand...

Apparantly 22.2% accurate...

 

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Bobster

• Sep 22, 2012

• #12

Another clue?

 

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Guest123

• Sep 22, 2012

• #13

One of these then...........

Model 7-1936
Model 40-1940
Model 8-1948
8 Mk II-1956
8 Mk III-1965
8 Mk IV-1970
8 Mk V-1972 [new design]
8 Mk V1-1984
8 Mk VII-1992-2008

 

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Brightspark2

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• Sep 22, 2012

• #14

RoB2 said:

Another clue?

Click to expand...

Well it has sort of been answered but I thought I would leave it too see if any one else knew.

HandySparks said:

OK, a stab in the dark. How about an AVO meter for blind people? Though how they'd read it, or why they would want one, I don't know.

Click to expand...

Thats a fine stab in the dark sir as thats exactly what it is. Its an AVO meter for blind people.

telectrix said:

it's an avo, obviously, think it's a model 8 modified. was it a blue peter project?

Click to expand...

And you sir are also correct as it is indeed an AVO model 8 variant but to give it its full name it is an AVO model 8 braille (IIRC).






Introduced in 1951, this meter was designed to be used by the visually-impaired, and consisted of a more-or-less standard AVO7 with a 'feeler mechanism' pointer over the scale, swung from the movement, and braille markings moulded above the arc of the scale window for V, I and R. The switch positions have similarly-marked braille mouldings and a milled slot each of the range selector switches.

The markings on the braille scale are said to allow users to interpret readings to within 1% of FSD.

So reading the meter is all well and good but how would they know where to put the probes?!?! ha

This website has quite a few pictures and a badly translated description http://translate.google.com/transla...le.co.uk&sl=nl&u=http://www.pa4tim.nl/?p=1833


And while searching for this website again I stumbled across this site The Braille Avometer - UK Vintage Radio Repair and Restoration Discussion Forum

With some good information and also someone claiming to own one.

Prizes will be given out in due course....

 

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HandySparks

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• Sep 22, 2012

• #15

Thanks; nice thread. I've never seen one, but the raised AC and DC symbols were the main clue for me.

Reading the translated article in the link, it sounds as if you connect to the circuit, then possibly lock the needle?, then move the external lever to make contact with needle movement, at which point you can then read the lever position on the braille scale.

I suppose if you were taking measurements in a repetitive manufacturing situation, or testing the same item of equipment in various locations, you'd get to know where to stick the probes.

 

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