Assembly is the reverse of disassembly...

http://www.telegraph.co.uk/technolo...-apart-and-photographed-by-Todd-McLellan.html

--
Ivan Reid, School of Engineering & Design, _____________ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

Using the patented Mavis Beacon "Hunt&Peck" Technique, Ivan D. Reid

Oh, cooooooooooooool.

 

Talking of vintage devices - I've accquired an AVO so old it doesn't
appear to have a model number.

 

No way, those buggers were hand made. I reckon you just haven't found
it yet...

Is it just me or did those things *ooze* quality. Even now when I pick
one up I think "Yep, they don't make 'em like they used to".

 

This one oozes a fine stink of old PVC and mould. It's ex WD, as far as
I can tell, and has an olive green jacket - which pongs horrid.

 

I notice that the last item is only shown fully assembled.

 

It's all 'character'.

 

My dad has quite a collection of them, some ex-MOD and mostly civvie
spec. A few years ago he had most of them checked over, rebuilt and
recalibrated, but it did help that my eldest sister works for Megger in
Dover and they still have some technicians left over from their
AVO-MEGGER days

One of them belongs to me, it's an ancient but immaculate AVO Junior in
a rawhide case that I was given when I was about 13.

--
Lozzo
Versys 650 Inter-Continental Hyperbolistic Missile , CBR600F-W racebike
in the making, TS250C, RD400F (somewhere)
BMW E46 318iSE (it's a car, not one of those 2-wheeled pieces of shite
they churn out)

 

Ooh, I have an AVO 7 and an 8. The 7 was my dads when he were a lad
and I bought the 8 from an old radio collector[1] back in the 70`s.

Sadly my Avo 8 has a fault in that it doesn't always read correctly. A
tap on the glass restores operation till next time it goes wrong. I`ve
been inside it a few times looking for the fault but nevery managed to
mend it. I'd hoped it was a dry joint, but it's probly the movement.

Ron

[1] either.

 

I'd guess not the movement, unless the needle stops in the same place
every time. In which case, a good magnifying glass and a very delicate
hand are needed.

If all else fails, give Megger in Dover a call, and ask about a refurb.

 

No, it's not a mechanical fault on the movement, that is free. It just
sometimes only reads about half of whatever it should read, and a tap on
the glass puts it right. It might be one of the many trim 'pots' inside
or just a bad connection, but of course, as soon as the meter is slipped
out of its rear case, the boodly thing works fine.

What`s the going rate for an AVO 8 these days £20/£30? A thing of beauty
but sadly almost obsolete.

Ron T'Otheren

 

Someone has tapped the glass of this one too much and it's dropped
through.

 

How like the rest of us.

 

Of course as any fule kno, the glass is recessed so you can safely
store all the dead fuses, diodes and transistors in there till the
repair is complete/abandoned.

Ron T'Otheren

 

Ah, yes, Murphy's at work.

Circuit diagram for the Mk3 here:-

http://www.richardsradios.co.uk/Images/mk3diagram.jpg

I'd be looking at the area round the thermistor or the resistor which
shunts it.

About £50 per week to hire.

http://www.inlec.com/electrical-c2/...ium=ppc&utm_term=802&utm_campaign=froogle#802

If the link doesn't break....

Or eBay has one in Israel for just over 70 quid at the moment with a
fortnight to go. With just a terminal post going for £3, it's worth more
than you reckon just as spares.

 

I've got one with a simla fault. It reads about 60% of what it should. It was
sent for calibration at one time, and shortly afterwards regained the above
fault. Unfortunately it was then unmantled for local repare, during which it
lost it's case so all the jbexf are now exposed. It still reads wrong, and
hfrvat the resistance ranges is difficult due to the non-extant case.

When you find the fault let me kno, it may be the same problem.

 

Yeah, but he has a beauty of a thing.

 

There are times I prefer the swing of a needle to the flashing up of
digits.