Search found 671 matches

by bd139
Sat Jun 22, 2024 6:13 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

Yeah, fair enough. The tube doesn't go beyond the M25. I believe there are companies that enable short-term use of horseless carriages, some requiring belonging to a club, some allowing you to walk up and present the appropriate papers, and drive out. Perhaps Dunstable Downs Sunday week? I did cons...
by bd139
Sat Jun 22, 2024 6:07 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

Won't be too many years before your kids have you :( Get a train to Newbury, then a taxi to Chieveley. I'm sure you could cadge a lift back to the station :) Urgh I'm not suicidal enough to get a train out that way on a Sunday :lol: While only £18.50 return with my railcard, I wouldn't make it unti...
by bd139
Fri Jun 21, 2024 10:00 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

We know you like such things: you keep on coming back for more. Unless, of course, you are just here for our company? (Newbury Sunday?) Alas I have no wheels and have the kids this weekend or I would. Won't be too many years before your kids have you :( Get a train to Newbury, then a taxi to Chieve...
by bd139
Fri Jun 21, 2024 9:28 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

That last picture gave me nasty flashback of that fucking D81. That has the same chassis as the 3 slot TM500. We know you like such things: you keep on coming back for more. Unless, of course, you are just here for our company? (Newbury Sunday?) Alas I have no wheels and have the kids this weekend ...
by bd139
Fri Jun 21, 2024 10:08 am
Forum: Test Equipment
Topic: Post a picture of a cat
Replies: 164
Views: 21758

Re: Post a picture of a cat

Regarding one point there, interesting statistics from a friend of mine who runs a meetup group with paid and free events. We were literally discussing this yesterday so it's a handy copy and paste men who paid cancellation before event -> 6% women who paid cancellation before event -> 23% men who d...
by bd139
Thu Jun 20, 2024 10:35 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

That last picture gave me nasty flashback of that fucking D81. That has the same chassis as the 3 slot TM500.
by bd139
Wed Jun 19, 2024 8:10 am
Forum: Test Equipment
Topic: Funky Fie-Dolla Flook (8860A)
Replies: 8
Views: 198

Re: Funky Fie-Dolla Flook (8860A)

Can't do it black. I mean med already claimed Bluke :lol:
by bd139
Tue Jun 18, 2024 11:24 am
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Specmaster wrote: Tue Jun 18, 2024 11:17 am
bd139 wrote: Tue Jun 18, 2024 10:33 am Having done it before I can confirm that a 1N4148 will take 2A for more than 1µs but only once. And it'll glow orange.
Here's that fascination with fire coming through again :lol: :lol:
I have no grounds to refute this :)
by bd139
Tue Jun 18, 2024 11:23 am
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

tggzzz wrote: Tue Jun 18, 2024 10:45 am
bd139 wrote: Tue Jun 18, 2024 10:33 am Having done it before I can confirm that a 1N4148 will take 2A for more than 1µs but only once. And it'll glow orange.
Is it then still a 1N4148? Or has it mutated into a blob of mixed badness?
Two blobs of mixed badness to be clear. Each bonded to their own lead.
by bd139
Tue Jun 18, 2024 10:33 am
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Having done it before I can confirm that a 1N4148 will take 2A for more than 1µs but only once. And it'll glow orange.
by bd139
Mon Jun 17, 2024 5:16 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Well I left this as neutral feedback: Badly modified with a series diode on the (-) terminal and had serious drift problems. Both corrected: removed diode and replaced U1 so not a write off. But clearly barely as described and this would have been known to the seller based on the current test shown....
by bd139
Mon Jun 17, 2024 5:02 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

I'll have a think about the seller. It was an easy enough fix and performance is as expected now. Neutral is fine. If I was a novice or without the diagnostic ability I have I probably would have just returned it. From what you have said, the seller deliberately misrepresented its operation in two ...
by bd139
Mon Jun 17, 2024 3:25 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Ok so this is now repaired and not drifting. As suspected the voltage amplifier opamp was wonky. It was replaced with a TI UA741CP which is just what I happened to have lying around. I'll calibrate it another day but it's delivering the rated current properly now anyway The culprit... IMG_0851.jpeg ...
by bd139
Mon Jun 17, 2024 3:20 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

The voltage drop was calibrated out by the seller. Obviously this changes due to the load and how much smoke was coming out of the 1N4148. ... Neutral feedback will be left as it’s obvious the seller was trying to hide this. If you can demonstrate they calibrated it out, then I'd screw the vendor -...
by bd139
Mon Jun 17, 2024 2:14 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Oh now hang on a minute, no it doesn't. There's a modification, clearly an insane one. There is what looks like a series 1n4148 with the negative lead :roll: Seems like a strange bodge. I'm wondering whether there might be a legitimate reason for doing it. Why a 1N4148 and not a 1N4007? From the ph...
by bd139
Mon Jun 17, 2024 2:08 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Re: Hooky HP E3610A

Just got an HP E3610A power supply from eBay for a respectable price. Initially looks good. ... Oh now hang on a minute, no it doesn't. There's a modification, clearly an insane one. There is what looks like a series 1n4148 with the negative lead ... Some people! I will have to very carefully check...
by bd139
Mon Jun 17, 2024 12:24 pm
Forum: Test Equipment
Topic: Hooky HP E3610A
Replies: 26
Views: 599

Hooky HP E3610A

Just got an HP E3610A power supply from eBay for a respectable price. Initially looks good. DSC_0020.jpg DSC_0018.jpg DSC_0021.jpg DSC_0017.jpg Oh now hang on a minute, no it doesn't. There's a modification, clearly an insane one. There is what looks like a series 1n4148 with the negative lead :roll...
by bd139
Fri Jun 14, 2024 10:41 am
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

I've just been trying and failing to resurrect a Rega Apollo CD player. It was skipping on early tracks, but not on late ones. I was willing to punt for a £10 replacement mechanism, but before it arrived I found some audiofool stuff indicating it was a common fault. Some of them had convinced thems...
by bd139
Wed Jun 12, 2024 9:53 pm
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

Well, that's interesting, but it has absolutely zero in common with that installation aside from being cows. :face_with_raised_eyebrow: The entire point of the CowParade cows is that they are a canvas for the artisan to work on and bring their message directly into the communities where their indiv...
by bd139
Wed Jun 12, 2024 5:14 pm
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

Definitely sent my youngest to the right school. They are time nuts. The school clock has milliseconds and is provided by NPL
IMG_0791.jpeg
by bd139
Wed Jun 12, 2024 6:51 am
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

Well it appears not to ask again this morning which makes their security claims lies and their motivations obvious.
by bd139
Wed Jun 12, 2024 6:16 am
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

tggzzz wrote: Tue Jun 11, 2024 9:46 pm We need an equivalent of mailinator for phone numbers.
I’ve got an effectively unlimited supply of phone numbers (giffgaff sims) but it means admin work so urgh.
by bd139
Tue Jun 11, 2024 9:15 pm
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

Just a heads up - please pass the message on to anyone still on Discord. So I went to fill up the dishwasher and came back and there's "suspicious activity" on my Discord account. They force you through a phone number verification process. Now I will not be giving my number to Discord for ...
by bd139
Mon Jun 10, 2024 7:18 pm
Forum: Test Equipment
Topic: TEK TM503 Project
Replies: 32
Views: 1018

Re: TEK TM503 Project

Oh now that was a winner. Interested in this one.
by bd139
Sat Jun 08, 2024 6:13 pm
Forum: Test Equipment
Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Replies: 2807
Views: 306416

Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread

Not even surprised it was fake. It was making diesely sorts of noises!

An art. I am disappointed. I'd rather have the boards in stock for parts!