Nice to see someone from your side of the 'pond' appreciating products from our side. I know it's hard to believe now but we used to be an innovative, and industrious nation prior to the 'Banksters' getting control of everything. 😆 I have the Model 8 MkV which is a great piece of kit for certain functions. The only issue I have is [lack of] availability of the 15V battery at sensible prices but the one you show looks good if I can find one. To be honest I'm not that bothered as I don't tend to use it for resistance measurements.
I have one of the older models (I can't remember which model exactly). It originally was used in a military manufacturer building parts for the Royal Navy and R C N. years ago. We also specialized in high quality kit but thanks to successive governments we gave all that work away. So you might find some Canuck handiwork inside some of the vintage ships if any left.
Did you know the later models of the Avo 8 range had a completely different of movement. Gone were the pivot and jewels movement, and in comes a taught band suspension type. This move was a down grade as whole movement would collapse, and the ring magnet would go off centre
There was also an AVO 8 mark VII. They come up for sale on eBay quite often. I have an AVO 8 mark VI, an AVO 9 and an AVO 8 mk III. The Avo 8 mk VI is my favourite.
I've got a veritable collection going on, been buying up the really old type, they make interesting lamps. I've got a mk5 with a yellow dial legend, it seems too constant to be fading, i wondered if it was an anniversary special. The later ones were all made in Dover, just at the end of the A20, in the shadow of the Western Heights forts.
I was surprised that anyone would be interested in an ancient old Avo . AYY-VOW :-) I had a avo-8 given to me, the previous owner dropped it :-(, cracked case and smashed glass. The meter movement worked but the linearity of the meter was way off, i checked all of the resistors and anything i thought could be the problem. All of the components were fine. I saw the thick metal plate on the movement with a screw through it. I came to the conclusion that i could not make it worse so i loosened the screw and slid the plate and the movement became better. When i was finished i managed to get the movement linear and lined up with every measurement. I'm sure you know all about that, but i was finding out for the first time. I didn't need to touch anything else, the voltages were spot on. I also have one of those newer avos the one with the blue ribbon tracks, one resistor was open circuit, easy fix. Sorry for the long comment.
Nice one Harvey,I just got anAVO 8Mk6 for xmas being a hacker fan just had to get one, To many references in the service bookllets.What a confidence building piece of kit .Mr. Cristofi said more accurate than a Fluke . So that was good enough for me.See you Sunday on Grahams channel FRG 7700 I believe this week xx
@@roberthead127 i hope it's accuracy is still ok, people treat them roughly because they are ancient technology. The meter movement is the important part, i tested mine by putting the meter into the 10 volt d.c mode then applied 10 volts, the needle should go to the far right 10v mark, then apply 5v instead, half scale should the reading, it gives you an idea of the linearity of the meter movement. I would be surprised if the internal resistors were bad. Sorry ill shut my face now :-D
@@zx8401ztv I got it from Graham he cleaned an serviced it before dispatch. I trust his good work my basic knowledge in testing says it seems all ok.But maybe I should relent an get a new Fluke ??
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Nice to see someone from your side of the 'pond' appreciating products from our side. I know it's hard to believe now but we used to be an innovative, and industrious nation prior to the 'Banksters' getting control of everything. 😆
I have the Model 8 MkV which is a great piece of kit for certain functions. The only issue I have is [lack of] availability of the 15V battery at sensible prices but the one you show looks good if I can find one. To be honest I'm not that bothered as I don't tend to use it for resistance measurements.
I have one of the older models (I can't remember which model exactly).
It originally was used in a military manufacturer building parts for the Royal Navy and R C N. years ago.
We also specialized in high quality kit but thanks to successive governments we gave all that work away.
So you might find some Canuck handiwork inside some of the vintage ships if any left.
Very nice explanation! The use of transformer is a nice way to do it
3:32 frownie face and sad face would have been acceptable answers. love the train vids!
Did you know the later models of the Avo 8 range had a completely different of movement. Gone were the pivot and jewels movement, and in comes a taught band suspension type. This move was a down grade as whole movement would collapse, and the ring magnet would go off centre
There was also an AVO 8 mark VII. They come up for sale on eBay quite often. I have an AVO 8 mark VI, an AVO 9 and an AVO 8 mk III. The Avo 8 mk VI is my favourite.
I've got a veritable collection going on, been buying up the really old type, they make interesting lamps.
I've got a mk5 with a yellow dial legend, it seems too constant to be fading, i wondered if it was an anniversary special.
The later ones were all made in Dover, just at the end of the A20, in the shadow of the Western Heights forts.
My dad had one of those.
I was surprised that anyone would be interested in an ancient old Avo . AYY-VOW :-)
I had a avo-8 given to me, the previous owner dropped it :-(, cracked case and smashed glass.
The meter movement worked but the linearity of the meter was way off, i checked all of the resistors and anything i thought could be the problem.
All of the components were fine.
I saw the thick metal plate on the movement with a screw through it.
I came to the conclusion that i could not make it worse so i loosened the screw and slid the plate and the movement became better.
When i was finished i managed to get the movement linear and lined up with every measurement.
I'm sure you know all about that, but i was finding out for the first time.
I didn't need to touch anything else, the voltages were spot on.
I also have one of those newer avos the one with the blue ribbon tracks, one resistor was open circuit, easy fix.
Sorry for the long comment.
Nice one Harvey,I just got anAVO 8Mk6 for xmas being a hacker fan just had to get one, To many references in the service bookllets.What a confidence building piece of kit .Mr. Cristofi said more accurate than a Fluke . So that was good enough for me.See you Sunday on Grahams channel FRG 7700 I believe this week xx
@@roberthead127 i hope it's accuracy is still ok, people treat them roughly because they are ancient technology.
The meter movement is the important part, i tested mine by putting the meter into the 10 volt d.c mode then applied 10 volts, the needle should go to the far right 10v mark, then apply 5v instead, half scale should the reading, it gives you an idea of the linearity of the meter movement.
I would be surprised if the internal resistors were bad.
Sorry ill shut my face now :-D
@@zx8401ztv I got it from Graham he cleaned an serviced it before dispatch. I trust his good work my basic knowledge in testing says it seems all ok.But maybe I should relent an get a new Fluke ??
Very nice repair on the meter movement! Al the old movements have lots of friction also causing them to read low unless tapped
The Plate with the screw that you moved was a Magnet shunt for movement calibration