Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
tggzzz:
--- Quote from: bd139 on July 17, 2022, 09:10:09 am ---Ok on way back from hamfest now.
--- End quote ---
I couldn't have gone; I was visited by a 1972 ice cream van full of ice cream :) It was equally full when it left, due to supply chain difficulties :(
--- Quote ---That absolute turd arrived at 08:30 and emptied it again >:(
--- End quote ---
Stop whining and copy him! If necessary, look in the left column of one of your posts.
--- Quote ---Did manage to grab a manky tek 465, a solartron 7150, some 10 turn pots, TO18 heat sinks and a book to sell. And I still have change from £25 :-DD
--- End quote ---
I thought "meh" until I saw the price.
Sounds like all the newly retired have bought the 465 they always hankered after, so market become softer. Or was it just "keep in garage not in house" manky?
What are you going to do with the 7150? I have a 7151 with cal until August 2020 that I ought to flog.
EDIT: I've now read more than your first tweet.
bd139:
--- Quote from: factory on July 17, 2022, 01:16:06 pm ---
--- Quote from: bd139 on July 17, 2022, 11:29:40 am ---Put some bananas in before the potatoes too :)
Solartron. Also works apart from two missing decimal points. I swapped a couple of the rather ancient LED displays around expecting that to be the issue but it wasn’t. Hopefully the main IC isn’t at fault :(
Should read 9.6245.
Got to go do some shopping now :(
--- End quote ---
Could it be a bad connection? I had this with my Solartron 7075, it was working fine before I got it, when it arrived it would only display even numbers (original cal seals were intact), I reseated some connectors & have had no problems since.
David
--- End quote ---
Possibly. Good idea. I’ll have a poke around it when I get a minute. The main ASIC is plessey so I bet something is broken inside it :-DD
grizewald:
So, here's the innards of the Datron 1071 as I received it. Everything is spotless and dust free due to the complete lack of fans.
Top layer, left: the main analogue board.
Note the row of guaranteed dead Phillips electrolytics at the lower front of the board. I knew I would have to replace all of them as a matter of course. At the top left of the picture are the two selected 1N829 Zener diodes that provide the positive and negative reference voltages.
Top layer, right: the digital board.
The battery which powers the RAM with the calibration constants reads 3.6V. A classic 6800 CPU as the brains of the unit.
Both boards show date codes in the range of late 1986 to mid 1987, so this is a relatively new model, which is also evidenced by the lack of bodge wires anywhere. Under the heatsink is the Ferranti ZNA2035 A-D chip - made from pure unobtanium.
Once I'd extracted both boards from the case, there was evidence that the analogue board has previously been repaired as there were flux residues on the underside which hadn't been cleaned off.
Underside layer, left: GPIB interface and display control board.
Both boards with chips of the same vintage as the main boards on the other side.
Underside layer, right: the current, AC and ohms boards.
So the machine has the full set of boards. No obvious problems like discoloured tants on any of them, which is a relief.
But of course, it's rare to find one of these meters in perfect working order and this one was no exception...
edit:images shrunk to 500 pixel previews - clickable for full size
bd139:
--- Quote from: tggzzz on July 17, 2022, 01:24:57 pm ---
--- Quote from: bd139 on July 17, 2022, 09:10:09 am ---Ok on way back from hamfest now.
--- End quote ---
I couldn't have gone; I was visited by a 1972 ice cream van full of ice cream :) It was equally full when it left, due to supply chain difficulties :(
--- Quote ---That absolute turd arrived at 08:30 and emptied it again >:(
--- End quote ---
Stop whining and copy him! If necessary, look in the left column of one of your posts.
--- Quote ---Did manage to grab a manky tek 465, a solartron 7150, some 10 turn pots, TO18 heat sinks and a book to sell. And I still have change from £25 :-DD
--- End quote ---
I thought "meh" until I saw the price.
Sounds like all the newly retired have bought the 465 they always hankered after, so market become softer. Or was it just "keep in garage not in house" manky?
What are you going to do with the 7150? I have a 7151 with cal until August 2020 that I ought to flog.
EDIT: I've now read more than your first tweet.
--- End quote ---
I should change the avatar away from Ferengi. The Ferengi antics are now relegated to covering the fuel costs. I will be keeping equipment where possible and using it for a few projects.
It’s a 7050 not a 7150 to be clear. Typo when I was sitting in the car. I will probably keep it if I can fix it as it smells of 70’s electronics and sort of has 5.5 digits.
vk6zgo:
--- Quote from: Robert763 on July 17, 2022, 09:29:13 am ---
--- Quote from: bd139 on July 17, 2022, 09:10:09 am ---Ok on way back from hamfest now.
That absolute turd arrived at 08:30 and emptied it again >:(
Did manage to grab a manky tek 465, a solartron 7150, some 10 turn pots, TO18 heat sinks and a book to sell. And I still have change from £25 :-DD
--- End quote ---
Is the turd a dealer?
--- End quote ---
I think he is a globetrotter!
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