Junk shop meter - UK Vintage Radio Repair and Restoration Discussion Forum

brunel · 1st Oct 2007, 4:07 pm

Not quite in the AVO class, but works perfect. Fitted an AA and the two lower
resistance rages are ok. All it needs is a "battery dry 35" if I ever require the high range to function.

Wondering when the P.O. took this out of service?

Another small meter added to the collection.

Brunel

GMB · 1st Oct 2007, 5:28 pm

I thought I had the exact same thing but it turns out to have a different bottom scale. It calls itself "minitest" by G.E.C. - but clearly the same basic design.

brunel · 1st Oct 2007, 6:42 pm

I have seen a similar clear Perspex knob fitted on a GEC meter, perhaps this PO type was manufactured by them.

Just had a look inside the case, it has stamped in the plastic..EE BFD.

Whether this refers to English Electric, who did have a very large factory in Bradford W.Yorks, I do not know.

Brunel

Tim · 1st Oct 2007, 6:55 pm

This looks like a "Meter multi function 12..." something. Probably an "A" or "B". I have a "C" and a "D" so it's not one of those. Not sure what the battery dry 35 is. I think it might be one of those 15 volt avo types with the contacts at each end.
The "Meter multi function", particularly the later types C&D are still occasionally seen in use. These were designed for bench or exchange equipment use rather than for faulting telephone circuits.

GMB · 1st Oct 2007, 7:17 pm

Mine still has an old battery in it and it is indeed a 15V one.

brunel · 1st Oct 2007, 8:03 pm

I have cleaned off a large sticky label on the back, to reveal 12C.

Yes the "Battery dry 35" contacts are for a double ended type.

Brunel

Tim · 1st Oct 2007, 8:22 pm

A MMF 12c from a different manufacturer then. Mine looks different to that, and is actually manufactured by AVO. Is yours also 20,000 ohms per volt? Quite nice small meter(and very useable). I would have liked a higher dc volts range and an anti paralax mirror behind the needle. I still use mine from time to time if I am playing with a radio in my lunchbreak(My 12C lives in my BT van). We can't get the 15 volt batteries from stores any longer though.

brunel · 1st Oct 2007, 8:42 pm

Can just make out, lower LH side of scale 20,000 Ω/V. DC

B

mickjjo · 1st Oct 2007, 9:00 pm

Hi Brunel, I have a P.O. M.M.R. No 12C, in a different style case to yours, this one is dated 28 August 1974 and came from the BT scrap pile many years ago. I glued together the broken case and have used it ever since, I have the leather protective case for it too, good little meters these

.

Regards, Mick.

1st Oct 2007, 4:07 pm	#1
brunel Heptode Join Date: Sep 2005 Location: LEEDS.......North of the River Aire. Posts: 872	Junk shop meter Not quite in the AVO class, but works perfect. Fitted an AA and the two lower resistance rages are ok. All it needs is a "battery dry 35" if I ever require the high range to function. Wondering when the P.O. took this out of service? Another small meter added to the collection. Brunel Attached Thumbnails

1st Oct 2007, 5:28 pm	#2
GMB Dekatron Join Date: Aug 2003 Location: near Reading (and sometimes Torquay) Posts: 3,092	Re: Junk shop meter I thought I had the exact same thing but it turns out to have a different bottom scale. It calls itself "minitest" by G.E.C. - but clearly the same basic design.

1st Oct 2007, 6:42 pm	#3
brunel Heptode Join Date: Sep 2005 Location: LEEDS.......North of the River Aire. Posts: 872	Re: Junk shop meter I have seen a similar clear Perspex knob fitted on a GEC meter, perhaps this PO type was manufactured by them. Just had a look inside the case, it has stamped in the plastic..EE BFD. Whether this refers to English Electric, who did have a very large factory in Bradford W.Yorks, I do not know. Brunel

1st Oct 2007, 6:55 pm	#4
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,307	Re: Junk shop meter This looks like a "Meter multi function 12..." something. Probably an "A" or "B". I have a "C" and a "D" so it's not one of those. Not sure what the battery dry 35 is. I think it might be one of those 15 volt avo types with the contacts at each end. The "Meter multi function", particularly the later types C&D are still occasionally seen in use. These were designed for bench or exchange equipment use rather than for faulting telephone circuits. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

1st Oct 2007, 7:17 pm	#5
GMB Dekatron Join Date: Aug 2003 Location: near Reading (and sometimes Torquay) Posts: 3,092	Re: Junk shop meter Mine still has an old battery in it and it is indeed a 15V one.

1st Oct 2007, 8:03 pm	#6
brunel Heptode Join Date: Sep 2005 Location: LEEDS.......North of the River Aire. Posts: 872	Re: Junk shop meter I have cleaned off a large sticky label on the back, to reveal 12C. Yes the "Battery dry 35" contacts are for a double ended type. Brunel

1st Oct 2007, 8:22 pm	#7
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,307	Re: Junk shop meter A MMF 12c from a different manufacturer then. Mine looks different to that, and is actually manufactured by AVO. Is yours also 20,000 ohms per volt? Quite nice small meter(and very useable). I would have liked a higher dc volts range and an anti paralax mirror behind the needle. I still use mine from time to time if I am playing with a radio in my lunchbreak(My 12C lives in my BT van). We can't get the 15 volt batteries from stores any longer though. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

1st Oct 2007, 8:42 pm	#8
brunel Heptode Join Date: Sep 2005 Location: LEEDS.......North of the River Aire. Posts: 872	Re: Junk shop meter Can just make out, lower LH side of scale 20,000 Ω/V. DC B

1st Oct 2007, 9:00 pm	#9
mickjjo Rest in Peace Join Date: Jul 2004 Location: Dartford, Kent, UK. Posts: 1,661	Re: Junk shop meter Hi Brunel, I have a P.O. M.M.R. No 12C, in a different style case to yours, this one is dated 28 August 1974 and came from the BT scrap pile many years ago. I glued together the broken case and have used it ever since, I have the leather protective case for it too, good little meters these . Regards, Mick. Attached Thumbnails