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From: N_Cook on 16 Sep 2009 10:55
I decided to break into my 1000V DC, 10 Gigohm insulation tester, today. No
particular reason , just curious, as still in perfect working order.
Had to break a seal to get inside, never needed repair by me or previous
owners, just my adapting to 9V nicad use rather than pair of unobtainable
4.5V batteries.
Made in Austria , Norma Isolationmesser 667 001
Date inside is 15 December 1965, i thought it would be 1970s
Just disintegrated foam inside, compenentry like Siemens AD130, AC153 and
OC75 all fine. Whenever I check calibration with a 1G glass cased resistor
it is the same cal setting, no switch problems or anything else.


--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



From: Adrian Tuddenham on 16 Sep 2009 13:01
N_Cook <diverse(a)tcp.co.uk> wrote:

> I decided to break into my 1000V DC, 10 Gigohm insulation tester
[...]
> Date inside is 15 December 1965,

Not sure of the exact date, but my Solartron CO 546 Audio Sig. Gen. is
probably 10 years older than that - and is still used several times a
week. It was rescued from a skip in the 1980s. I cleaned it up and
replaced the valves as a precautionary measure and have recently had to
replace one electrolytic capacitor.

Also I use a BBC audio oscillator TS/10/404 and a pair of PPM/Measuring
Sets on a daily basis. All of those appear to date from the late 1950s
or early 1960s. They have not been quite as trouble-free as the
Solartron, but most of the problems have been caused by dirty contacts
on the attenuators and pre-set pots. In the 20 years I have owned
them, they have needed one replacement valve between the whole lot.

I don't know if you would count 316 plugs and jack strips, but some of
mine are pre-war.


--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk
From: Martin Whybrow on 16 Sep 2009 14:35


"N_Cook" <diverse(a)tcp.co.uk> wrote in message
news:h8qu9s$buu$1(a)news.eternal-september.org...
>I decided to break into my 1000V DC, 10 Gigohm insulation tester, today. No
> particular reason , just curious, as still in perfect working order.
> Had to break a seal to get inside, never needed repair by me or previous
> owners, just my adapting to 9V nicad use rather than pair of unobtainable
> 4.5V batteries.
> Made in Austria , Norma Isolationmesser 667 001
> Date inside is 15 December 1965, i thought it would be 1970s
> Just disintegrated foam inside, compenentry like Siemens AD130, AC153 and
> OC75 all fine. Whenever I check calibration with a 1G glass cased resistor
> it is the same cal setting, no switch problems or anything else.
>
>
> --
> Diverse Devices, Southampton, England
> electronic hints and repair briefs , schematics/manuals list on
> http://home.graffiti.net/diverse:graffiti.net/
>
>
>
I have an AVO transistor analyser, the data book that's with it is dated May
1960 but not sure of the actual manufacturing date. It doesn't get any use
because it needs 14 U10 sized cells which are �4.90 each from The Small
Battery company! I suppose I could make an adapter (well, 14 of them) to use
AA cells but I just haven't got around to it.
Lovely piece of kit, built like a tank and in remarkably good condition.
Martin
--
martin<dot here>whybrow<at here>ntlworld<dot here>com


From: Metabastler on 16 Sep 2009 16:05
We still use some General Radio Stuff at work. Not GenRad or followup.
And I have a 20m (steel) tape ruler still in use from about 1930, does
this count too? :-)

Greetings from Germany
Metabastler
From: Adrian C on 16 Sep 2009 19:57
N_Cook wrote:

>

Hammer.

--
Adrian C
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