The Shop > Tools
Controller board for a C3 mini lathe?
BaronJ:
--- Quote from: 75Plus on January 08, 2015, 10:34:25 AM --- :offtopic:
Separated again by a common language! I have heard of an AVO forever and always thought it was a brand name. I had to see DVM and AVO in the same sentence to realize that the item was a VOM! Live and learn. :doh:
Joe
--- End quote ---
Hi Joe,
Yes, the AVO which stands for "Amps, Volts, Ohms" became the brand name for the multimeter that for more than 60 years was the industry standard. The "Model 7" was aimed at the electrical market and the "Model 8" was aimed at the wireless/TV/electronics market. It's accurate 20K opv and mirrored scale set it apart from anything else.
There were variations of course, the AVO Minor, a pocket sized version, and the Model 8 with its seven or eight variants. All superb instruments, unfortunately no longer in production. In fact I don't think AVO as a company exist any more.
John Rudd:
--- Quote from: Baron on January 08, 2015, 03:05:24 PM ---
--- Quote from: 75Plus on January 08, 2015, 10:34:25 AM --- :offtopic:
Separated again by a common language! I have heard of an AVO forever and always thought it was a brand name. I had to see DVM and AVO in the same sentence to realize that the item was a VOM! Live and learn. :doh:
Joe
--- End quote ---
Hi Joe,
Yes, the AVO which stands for "Amps, Volts, Ohms" became the brand name for the multimeter that for more than 60 years was the industry standard. The "Model 7" was aimed at the electrical market and the "Model 8" was aimed at the wireless/TV/electronics market. It's accurate 20K opv and mirrored scale set it apart from anything else.
There were variations of course, the AVO Minor, a pocket sized version, and the Model 8 with its seven or eight variants. All superb instruments, unfortunately no longer in production. In fact I don't think AVO as a company exist any more.
--- End quote ---
They don't as the company was bought up by Megger, which does still exist...
BaronJ:
--- Quote from: Pete W. on January 08, 2015, 11:34:20 AM ---Hi there, Baron,
--- Quote from: Baron on December 30, 2014, 12:23:33 PM ---Hi Pete,
You hang on to the AVO ! I have both AVO 7 and a pair of 8's. One over 40 years old. Digital meters are OK for some jobs, but there are many jobs where an analog meter can't be beaten.
--- End quote ---
:offtopic:
How do you cope with the 15 volt dry battery problem (for the high Ohms range)? Years ago, I saw a press review of a DC to DC converter that produced the 15 volts from the 1½ volt battery but it never seemed to catch on. Also, I never did work out how you switched it on.
--- End quote ---
Me neither :palm: I use a piece of thin plastic wrapped around ten AG10 cells clipped in place of the original battery. The only downside is the contact between the cells deteriorates with time and you have to take the pack apart and clean them. They seem to grow some kind of mold across the insulator as well.
--- Quote ---By the way, my Senior Engineer mentor when I was a junior engineer used to emphasise that the Avo 8 is more sensitive than the Avo 7 (lower movement FSD) but the Avo 7 is more precise than the Avo 8 because the Avo 7 uses wirewound resistors while the Avo 8 uses carbon or metal film resistors!
--- End quote ---
The AVO 8 is 20K opv whilst the AVO 7 is 1K opv. As far as I am aware, bearing in mind circuit loading they are both the same.
BaronJ:
Thanks John,
I knew Megger was still around, but had no idea that they captured AVO.
Do they do the spares for them or is it just their own stuff ?
Bluechip:
Not that it's of any great significance but the B121 is not quite extinct ....
http://www.smallbattery.company.org.uk/sbc_a411.htm
Although the price would not appeal much ... :D
Dave
EDIT Whoops ... not in stock ... :scratch:
Could be a goner after all .... :zap:
Although there is a Varta 15v Battery and it looks like this is an adapter for same ???
http://uk.farnell.com/varta/v74px/battery-15v-10lf15-alkaline/dp/856174?ost=varta+15v
http://uk.farnell.com/avo-international/5210-064/adaptor-battery-avo-8/dp/4231454
So, looks like an easy job for that nice Mr Stevensons 3D printer ... :thumbup:
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