Re: Favourite Test Equipment

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Sujet : Re: Favourite Test Equipment
De : dhg99908 (at) *nospam* hotmail.se (Dan Green)
Groupes : sci.electronics.design sci.electronics.repair
Date : 11. Apr 2024, 23:36:27
Autres entêtes
Organisation : A noiseless patient Spider
Message-ID : <7epg1j58rndepgcf07sj3nejuh5h3iqnh2@4ax.com>
References : 1 2 3 4 5 6
User-Agent : ForteAgent/8.00.32.1272
On Fri, 12 Apr 2024 06:04:45 +1000, Trevor Wilson
<trevor@rageaudio.com.au> wrote:

On 11/04/2024 11:55 pm, Phil Hobbs wrote:
On 2024-04-10 16:30, Trevor Wilson wrote:
On 11/04/2024 3:42 am, Cursitor Doom wrote:
On Wed, 10 Apr 2024 11:40:02 +1000, Trevor Wilson
<trevor@rageaudio.com.au> wrote:
>
On 1/04/2024 4:41 am, Cursitor Doom wrote:
Hi all,
>
I'm starting to get a bit fed up with having my test equipment blow up
just when it's needed. This is the drawback with vintage gear; if it's
not used frequently then it can go *bang* the next time you switch it
on. It makes for good practice in repairing stuff, but wastes a lot of
time which could be better spent doing other things.
I think it's time I modernised my test gear. I was just wondering if
anyone has any recommendations they can share. Is there a particular
piece of test equipment you couldn't live without? Something you're
particularly impressed with? I'd be interested to know so I can
perhaps acquire said item and thereby reduce the number of explosions
I experience.
>
Thanks,
>
CD.
>
**In my 55 years of servicing, I've only blown up one thing: A Micronta
DMM, which I connected to a laser power supply. I should not have done
it. Clear operator failure. Everything else works just fine. Even my
first multimeter. A Sanwa U-50D my dad gave me on my 14th birthday.
Still works fine. My first DMM. A cheap 'n cheerful SOAR. Works just
fine. My first Fluke meter. A 40 year old Fluke 85. Works fine. I've
had
to clean the switch a few times. Otherwise, no problems. Ditto my other
15 or so meters. Same deal with my 'scopes.
>
I don't know what your problem is. Test equipment, when treated
properly
lasts a long time.
>
To be fair, these "explosions" are typically capacitors: old, dried
-out electrolytics in test gear that hasn't been used in a long time
go bang when the power's switched on - as do old X2 safety caps. Those
are the chief culprits IME.
>
**Oh, I see. You ignore regular maintenance. That makes sense. I hope
no one buys a car from you.
>
 
Whereas all you Ozites are 100% rational reasonable polite beings who
are always on top of everything, including predicting the exact date
when an old cap will give up the ghost.
 
Silly me for forgetting. ;)
 
Cheers
 
Phil Hobbs
>
**The FIRST thing I do, when I acquire a new (second hand) piece of
equipment is to replace all the RIFA caps that are connected across the
mains I find. Then I carefully look for any signs of distress from
electros. After which, I experience no or few problems. Two items I
recently acquired (a Sound Technology 1000A and HP339A) were COMPLETELY
re-built with all new electros, as they are very old products. Most of
the electros measured acceptably well, but some were well below spec
(ESR). They now perform as new (better than new in the case of the
339A). OTOH, my recently acquired Panasonic VP-7721A required nothing
else but a new NiCad back-up battery. Performance was well beyond
specification. No RIFA caps either.
>
Here is the distortion profile of 1kHz output from the Pana:
>
https://ibb.co/2yqM1S4
>
>
I have no idea why the OP has so many problems with decent test
equipment, as test equipment tends to use superior quality components
when compared to domestic equipment. With the exception of RIFA caps.
>
And the only product that ever failed when I switched on was a second
hand Tektronix 2267B, I acquired from the Japan a few years back. It
seems that the RIFA caps in the power supply had become accustomed to
the Japanese 100VAC mains and 'chucked a wobbly' when connected to our
Aussie mains supply. Much smoke and more than a little panic from me.
Hence, I now replace ALL RIFA caps on sight.

Ah - you're Australian. That explains a lot.

Date Sujet#  Auteur
31 Mar 24 * Favourite Test Equipment81Cursitor Doom
31 Mar 24 +* Re: Favourite Test Equipment2John Larkin
1 Apr 24 i`- Re: Favourite Test Equipment1Cursitor Doom
1 Apr 24 +* Re: Favourite Test Equipment65Jan Panteltje
1 Apr 24 i+* Re: Favourite Test Equipment10Cursitor Doom
1 Apr 24 ii+* Re: Favourite Test Equipment6Jan Panteltje
1 Apr 24 iii+* Re: Favourite Test Equipment2legg
2 Apr 24 iiii`- Re: Favourite Test Equipment1Jan Panteltje
1 Apr 24 iii`* Re: Favourite Test Equipment3Liz Tuddenham
1 Apr 24 iii +- Re: Favourite Test Equipment1Cursitor Doom
2 Apr 24 iii `- Re: Favourite Test Equipment1Jan Panteltje
2 May 24 ii+* Re: Favourite Test Equipment2Jan Panteltje
2 May 24 iii`- Re: Favourite Test Equipment1John Larkin
2 May 24 ii`- Re: Favourite Test Equipment1Jan Panteltje
1 Apr 24 i+* Re: Favourite Test Equipment8piglet
1 Apr 24 ii+* Re: Favourite Test Equipment3Cursitor Doom
2 Apr 24 iii`* Re: Favourite Test Equipment2Phil Hobbs
2 Apr 24 iii `- Re: Favourite Test Equipment1John Larkin
2 Apr 24 ii`* Re: Favourite Test Equipment4Jan Panteltje
2 Apr 24 ii `* Re: Favourite Test Equipment3John Larkin
5 Apr 24 ii  `* Re: Favourite Test Equipment2Gerhard Hoffmann
6 Apr 24 ii   `- Re: Favourite Test Equipment1John Larkin
4 Apr 24 i`* Re: Favourite Test Equipment46Klaus Vestergaard Kragelund
4 Apr 24 i +- Re: Favourite Test Equipment1Jan Panteltje
4 Apr 24 i `* Re: Favourite Test Equipment44Phil Hobbs
4 Apr 24 i  +* Re: Favourite Test Equipment15bitrex
5 Apr 24 i  i+* Re: Favourite Test Equipment2Phil Hobbs
5 Apr 24 i  ii`- Re: Favourite Test Equipment1bitrex
5 Apr 24 i  i`* Re: Favourite Test Equipment12Jan Panteltje
5 Apr 24 i  i `* Re: Favourite Test Equipment11bitrex
5 Apr 24 i  i  `* Re: Favourite Test Equipment10john larkin
6 Apr 24 i  i   `* Re: Favourite Test Equipment9Klaus Vestergaard Kragelund
6 Apr 24 i  i    `* Re: Favourite Test Equipment8John Larkin
6 Apr 24 i  i     `* Re: Favourite Test Equipment7Cursitor Doom
6 Apr 24 i  i      +- Re: Favourite Test Equipment1John Larkin
7 Apr 24 i  i      +* Re: Favourite Test Equipment4Roger Hayter
7 Apr 24 i  i      i`* Re: Favourite Test Equipment3Cursitor Doom
7 Apr 24 i  i      i +- Re: Favourite Test Equipment1Phil Hobbs
7 Apr 24 i  i      i `- Re: Favourite Test Equipment1Ralph Mowery
7 Apr 24 i  i      `- Re: Favourite Test Equipment1Bill Sloman
5 Apr 24 i  +- Re: Favourite Test Equipment1Bill Sloman
5 Apr 24 i  `* Re: Favourite Test Equipment27Jan Panteltje
5 Apr 24 i   +* Re: Favourite Test Equipment11Liz Tuddenham
5 Apr 24 i   i+- Re: Favourite Test Equipment1Jan Panteltje
5 Apr 24 i   i+* Re: Favourite Test Equipment8John Larkin
5 Apr 24 i   ii`* Re: Favourite Test Equipment7Phil Hobbs
5 Apr 24 i   ii `* Re: Favourite Test Equipment6John Larkin
5 Apr 24 i   ii  +* Re: Favourite Test Equipment3Liz Tuddenham
5 Apr 24 i   ii  i+- Re: Favourite Test Equipment1john larkin
5 Apr 24 i   ii  i`- Re: Favourite Test Equipment1Gerhard Hoffmann
6 Apr 24 i   ii  `* Re: Favourite Test Equipment2Gerhard Hoffmann
6 Apr 24 i   ii   `- Re: Favourite Test Equipment1Phil Hobbs
5 Apr 24 i   i`- Re: Favourite Test Equipment1Cursitor Doom
5 Apr 24 i   +* Re: Favourite Test Equipment4John Larkin
5 Apr 24 i   i+* Re: Favourite Test Equipment2Cursitor Doom
6 Apr 24 i   ii`- Re: Favourite Test Equipment1Bill Sloman
6 Apr 24 i   i`- Re: Favourite Test Equipment1bitrex
5 Apr 24 i   `* Re: Favourite Test Equipment11Cursitor Doom
6 Apr 24 i    +- Re: Favourite Test Equipment1Bill Sloman
6 Apr 24 i    +- Re: Favourite Test Equipment1Bill Sloman
6 Apr 24 i    `* Re: Favourite Test Equipment8Cursitor Doom
6 Apr 24 i     `* Re: Favourite Test Equipment7John Larkin
7 Apr 24 i      `* Re: Favourite Test Equipment6Cursitor Doom
7 Apr 24 i       +* Re: Favourite Test Equipment2Phil Hobbs
8 Apr 24 i       i`- Re: Favourite Test Equipment1ehsjr
7 Apr 24 i       `* Re: Favourite Test Equipment3Cursitor Doom
7 Apr 24 i        `* Re: Favourite Test Equipment2John Larkin
8 Apr 24 i         `- Re: Favourite Test Equipment1Cursitor Doom
1 Apr 24 +- Re: Favourite Test Equipment1legg
10 Apr 24 `* Re: Favourite Test Equipment12Trevor Wilson
10 Apr 24  `* Re: Favourite Test Equipment11Cursitor Doom
10 Apr 24   `* Re: Favourite Test Equipment10Trevor Wilson
11 Apr 24    `* Re: Favourite Test Equipment9Phil Hobbs
11 Apr 24     +* Re: Favourite Test Equipment5john larkin
12 Apr 24     i+- Re: Favourite Test Equipment1ehsjr
12 Apr 24     i`* Re: Favourite Test Equipment3Bill Sloman
12 Apr 24     i `* Re: Favourite Test Equipment2Trevor Wilson
12 Apr 24     i  `- Re: Favourite Test Equipment1Bill Sloman
11 Apr 24     `* Re: Favourite Test Equipment3Trevor Wilson
12 Apr 24      `* Re: Favourite Test Equipment2Dan Green
12 Apr 24       `- Re: Favourite Test Equipment1Bill Sloman

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