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Test Equipment Anonymous (TEA) group therapy thread

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Vince:
COMPONENT SORTING


OK done digesting that large drawer.

Now found another drawer... a smaller one this time ! OK, I promise... I think... I am pretty suuuure... I really believe they aren't any more hiding anywhere now, this is the last drawer/box/bag of components that was left to process !  I guess only time will tell if that was a lie or not...

Lots of IC's again ! A whole plastic bag of brand new TO92 things as well.... guess it's all BJT...

A few cool IC's in metal cans with gold plated leads, just as I like them  :-+

A few EPROM, love these old ceramic EPROM, they look so cool, and I am always so curious to read their contents, it's like opening a mystery box !  >:D
... but that will have to wait for the lab to be computerized and equipped with a chip programmer of course... so not anytime soon. The longer the wait the bigger the excitement !  :-DD

But that will be for another day... 00H40 here and I am yawning badly.

Good night people....  :=\

 

mnementh:

--- Quote from: AVGresponding on June 27, 2022, 07:59:00 pm ---* adds fuel to the fire *
https://www.ebay.co.uk/itm/325245934818


--- End quote ---

That's a nice bong, but I dunno that it's 150 quid worth of nice...

mnem
 >:D

vk6zgo:

--- Quote from: bsdphk on June 27, 2022, 08:20:03 am ---I doubt that cable is for sub-sea use, almost all such cables have at least one layer of steel, and much thicker envelopes.

But it is not a trivial cable either: It could transfer between two and thirty thousand simultaneous telephone conversations, depending on the route and repeater spacing.

--- End quote ---
It looks a lot like the terrestrial "coax cables" which were a big deal in Oz back in the early 1960s, before microwave links became widespread.

When the old PMG's Dept ran such a cable from Perth to Geraldton, back around '62/'63, They used the "direct burial system", & had a crew with several Cat D9s ripping a trench.

A large part of the route became  very "heavy going" for the ripper assemblies, which were lasting a lot shorter time than had been predicted.
After discussions, Cat sent an Engineer, who was "embedded" with the crew, & "burnt the midnight oil" a lot examining the damage to the rippers.
Ultimately, following his insights, Cat made some new ripper blades which did have the predicted life.

I wonder if they would go to such lengths today-----I somehow doubt it!

tautech:

--- Quote from: vk6zgo on June 28, 2022, 01:38:50 am ---
--- Quote from: bsdphk on June 27, 2022, 08:20:03 am ---I doubt that cable is for sub-sea use, almost all such cables have at least one layer of steel, and much thicker envelopes.

But it is not a trivial cable either: It could transfer between two and thirty thousand simultaneous telephone conversations, depending on the route and repeater spacing.

--- End quote ---
It looks a lot like the terrestrial "coax cables" which were a big deal in Oz back in the early 1960s, before microwave links became widespread.

When the old PMG's Dept ran such a cable from Perth to Geraldton, back around '62/'63, They used the "direct burial system", & had a crew with several Cat D9s ripping a trench.

A large part of the route became  very "heavy going" for the ripper assemblies, which were lasting a lot shorter time than had been predicted.
After discussions, Cat sent an Engineer, who was "embedded" with the crew, & "burnt the midnight oil" a lot examining the damage to the rippers.
Ultimately, following his insights, Cat made some new ripper blades which did have the predicted life.

I wonder if they would go to such lengths today-----I somehow doubt it!

--- End quote ---
If it were for a ~400km trench(Perth to Geraldton = 373km straight line distance) you'd think so but these days an off the shelf microwave link solution would be way cheaper.....you just couldn't even get the machinery on the job for less !

vk6zgo:

--- Quote from: tggzzz on June 27, 2022, 09:52:25 am ---
Another point is that the cable is extremely inflexible, and would be very difficult to draw between exchanges. On land they would have used single coax cables, and added more as and when extra capacity was required.
--- End quote ---

Nope! the "coax cable" runs used in Australia, which were very similar to the example in your pix, were used for very long distance  runs, like Perth to Geraldton & Melbourne to Sydney where it was "direct buried". (see my posting above).
It was never fed through normal urban cable ducts.
--- Quote ---
 Another point is that point-to-point microwave links were preferable to coax: faster/easier to install, higher capacity.
--- End quote ---

Indeed, & cheaper!
The equivalent of the East-West Microwave system between the Eastern & Western seaboards of Australia, completed in 1969, would have been prohibitively expensive to provide using coax cable.

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