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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 9th Mar 2005, 10:26 pm   #41
pmmunro
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Default Re: AVO Multimeter survey

Colin,

As you'll see on the first page of the thread, your meter was made in November 1958, so it wasn't very old when you got it. The 12 repair was about half the new cost in the 1960s.
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Old 9th Mar 2005, 10:54 pm   #42
Wayne H
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Post Re: AVO Multimeter survey

From the Left coast of the Atlantic -
Model 9SX, Pan-Climatic No. 1, S/N 1210-1S-461, Lower left corner. Brown Bakelite Panel, Bronze paint metal case, green vinyl carry case.
NATO, No. 1, S/N 5150, Lower left corner. Brown Bakelite Panel, Bronze paint metal case, green vinyl carry case.
Model 40, S/N 8433-B-1152, Lower right corner, Black bakelite, 166-ohm/volt DC sensitivity. Fitted wood case with shunts, current transformer, and voltage extender.
Model 8, Mk II, S/N 148617-C-1162. Black Bakelite.
Model 8 Mk V, S/N 51985 8V/1/75. Black plastic. S/N in battery compartment.
Model 8 Mk 7, S/N ??. Black Plastic.
Model 8 Mk ??, 18913-C-1253, Lower right. Black Bakelite Panel, Gray metal case, terminals do not accept banana plugs.
Model 8 Mk 6, S/N 1063BE Decal on rear. Black plastic.
Model 7 Mk II, S/N 84528-A-460, Lower right. Black bakelite panel Gray metal case. 500-ohm/volt DC sensitivity. Made by Automatic Coil Winder.
Is that enuf for now?
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Old 12th Mar 2005, 12:59 pm   #43
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Default Re: AVO Multimeter survey

In our test department at work there is a model 7 gathering dust. Serial number 01612 7/3/77

I'm not 100% sure about the last 7 as it is partially rubbed off.
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Old 6th Apr 2005, 5:44 pm   #44
Muddled
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Default Re: AVO Multimeter survey

Hi SPCh. I'm a newbie to this forum, I came accross it while googling for info on a Model 7 Avometer that has just been given to me. It has this serial number on the bottom RH side of the scale 7XXXX-A-557. It has a black Bakelite face & battery cover, a hammertone gold painted body & a gold instruction plate screwed to the back which also bears the model & patent numbers. It also has the 1, 1.5, 2 & the W hand printed in red on the power scale. It seems in very good condition & the only deviations from standard are the probes & a modified battery compartment - A "C" cell & holder plus a 9volt battery connector soldered onto the appropriate tabs that would have serviced the 2 x 4.5 volt batteries. Also, it has a decal on it stating it was sold by the Australian agent Electrical Equipment of Australia Ltd. 75 Liverpool St, Sydney.

Hope this helps your survey.
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Old 6th Apr 2005, 10:39 pm   #45
G Barham
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Default Re: AVO Multimeter survey

Hi

I've had about 8 in the last 2 years, including a AM one from the WW2 period.

Currently I have a lovely model 7 in excellent condition which nobody wants ...it's number is 21669-A-251

Cheers


Tony.
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Old 6th Apr 2005, 11:34 pm   #46
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Default Re: AVO Multimeter survey

Quote:
Originally Posted by G Barham
I've had about 8 in the last 2 years, including a AM one from the WW2 period.
An AM Avo meter now I'm really puzzled.

Mike
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Old 7th Apr 2005, 12:06 am   #47
SPCh
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Default Re: AVO Multimeter survey

I think "Air Ministry", Mike, not "Amplitude Modulation".

Sorry guys and gals; I've been out of circulation for a few weeks. Thanks for the new inputs, they'll be absorbed & processed over the next few days, and I'll get back to you individually for any queries/clarifications.
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Old 7th Apr 2005, 8:56 pm   #48
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Default Re: AVO Multimeter survey

Quote:
Originally Posted by SPCh
I think "Air Ministry", Mike, not "Amplitude Modulation".
Thanks SPCh it seems the older I get the dafter I become.

Mike.
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Old 12th Apr 2005, 12:11 pm   #49
MB60
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Thumbs up Re: AVO Multimeter survey

I have an AVO 8 MkIII.

Serial number; 89672 1268

This would indicate a production date of December 1968.

As I now know; the MkIII was introduced in 1964 and the MkIV in 1968, so my MkIII must have been a very late one.
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Old 12th Apr 2005, 4:31 pm   #50
ekco1953
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Default Re: AVO Multimeter survey

Avo 8 MkV bought on ebay last year , so serial number is: 0xxxx 8V/4/77. Told it was a college sale. Great meter, great condition, great buy.

When I was apprenticed to EKCO in Glasgow I bought a wee Avominor. A while later it got nicked . Wish I could remember the serial number!

HTH
Jim
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Old 13th Apr 2005, 12:12 pm   #51
maxwell
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Default Re: AVO Multimeter survey

Hi all.

A couple more for your list;

No 7; 4804-A-448
No 8; 12637-365

Regards.
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Old 21st Apr 2005, 2:12 pm   #52
barryinrugby
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Default Re: AVO Multimeter survey

Avo 8 Mk V

Serial no 47418 8V/11/74

barry
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Old 12th May 2005, 3:27 pm   #53
Ian G Bennett
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Default Re: AVO Multimeter survey

Here is another one for your survey, it must be a monster!
Avo model 8 MK2 ser No 6054 1069
Cheers Ian
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Old 23rd May 2005, 12:19 pm   #54
drek
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Default Re: AVO Multimeter survey

Hi,
I have aquired a Universal Avominor - the number appears to be 48547/742. There is another reference on the back stating - Type H and REF.10S/46.
I hope this is of assistance to you.

Please can anyone advise me where I may obtain a 1.5 battery of the correct size etc to operate this meter or an alternative battery.

thanks, Drek
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Old 23rd May 2005, 3:42 pm   #55
SPCh
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Default Re: AVO Multimeter survey

Thanks for the input.

I'm afraid they don't sell that battery type any more. It's the old U10 "Standard" battery, but I believe the 1289 "FLAT" battery (the one with two prongs on top) is built up from three of them. Alternatively, you can use a normal AA battery, fattened up by wrapping paper round it, and "extended" by a metallic packing-piece (a piece of volume control spindle has been known to serve).

Good luck
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Old 2nd Jul 2005, 5:59 pm   #56
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Question Re: AVO Multimeter survey

I saw this Forum on researching my newly aquired (Ebay) AVO Model 8 MkV meter, I have a few DMM but still like to see trends in my metering rather than constant digital confusion.
But working out it serial number compared to every one else has me confused, maybe it been back for major repairs so here is mine.
GC No 0043701 (then next line down)
8V

This number is taken from the RH side casing and from inside the battery compartment.
Question - do you have From/To dates of manufacture for the Model 8
I also note the front appears to use only 3 screws for fixing, as well as that the trick of using two PP3 and 5v zener diode seems impossible in the space provided for the BLR121 battery (off the Maplins then).

Thanks in anticapation
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Old 3rd Jul 2005, 9:23 am   #57
SPCh
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Default Re: AVO Multimeter survey

Thanls, Belmond.

The serial number looks right enough, apart perhaps for the preceding two letters and the missing date. I presume these numbers are on twin labels, one at top centre of the RH side of the case, and one in the battery compartment below the BLR121. The serial number is typically five digits followed by space 8V (=Model 8 Mark 5) then the date as /m/yy.

The AVO history is poorly documented (despite the attempts of a few of us to improve it) so it is not possible to simply look up the date of any given serial-numbered unit. That is essentially the point of the present survey.

Even with the generous response to date, it has not been possible to populate a comprehensive list yet - it's still very patchy.

If you want more details about AVOs generally, you should look at the many excellent contributions by PMMunro.
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Old 3rd Jul 2005, 9:35 am   #58
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Sorry, Belrond; I got your name wrong, and misspelled my gratitude. Need to get my fingers sharpened !
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Old 3rd Jul 2005, 8:05 pm   #59
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Smile Re: AVO Multimeter survey

Hi I have a model 7 number 463-a-1147 which I picked up cheap from a boot sale( 5.00).
Unfortunately it now has a sticking needle.
I will have to get round to sorting it out.
Good luck with your survey,
Paul.
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Old 3rd Jul 2005, 8:47 pm   #60
Family_Dog
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Default Re: AVO Multimeter survey

Hi,

I can contribute two models to your survey:

AVO 7 Serial # 37466 7/3/71
and
AVO 8 Mk3 Serial 27691 . 1065

Both these meters are nearly mint condition, the AVO 8 has some of the white marking paint flaking off. I would be interested in knowing the easiest practical way to repaint these markings, suppose a toothpick & white enamel paint should do it?

-Eric
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