The MK Safety plug

[OldGermanHeaps]

Dr Doofenshmirtz said:

OldGermanHeaps said:

As far as electricity is concerned all things being equal, moisture, salinity, distance, area in contact with the source etc then due to ohms law as voltage increases current flow increases in relation so with 240v applied a lot more current flows through you than at 55v, and its the current flow that harms you, voltage doesn't really harm you from a current limited source, you can be zapped with 100000v and just feel a tickle as long as there isn't much current available, but in terms of a supply which has enough grunt to kill you lower voltage = lower current frowing through your bodies fixed resistance = safer.

Spot the person who's never worked on CRT monitors !

Just spotted this, I worked on crts i
pcs, viewdata terminals and atms for years at fujitsu/icl, never got a belt though, at least not from monitors. I was always judicious in applying the fairystick under the suction cup to discharge it, twice to account for dielectric memory. There is a fair bit of current in a crt belt, a lot of joules discharged in a very short time.
Had a few hair raising moments from big printers though.

[JustALooseScrew]

Halmyre said:

Oh yes. Cursing and swearing trying to wrap the bare wire round the post and screw it down without it unravelling and escaping. And then finding the cover lying on the table laughing at you - "hey, you forgot to thread me on first! Ha ha, loser!"

Isn't there an old saying "It's only a mistake if you do it twice."?

I've had one too many 'Ha ha, loser!' moments over the years more often than not with those bulkhead cable glands, it's even funnier when running six cables into an enclosure you realise you've left a key piece off every cable. Then cursing and getting yourself into a hissy fit you realise that even after rewiring the whole lot No. 6 is still devoid of some parts.


These are the buggers:

[JustALooseScrew]

Gary C said:

AlexC1981 said:

Gary C said:

I'm more interested in the things at the other end. Pics please.

(I too have a few 80's computers, A 3032 PET, TRS-80 IV,C64,ZX81,Spectrum,BBC B, DEC MicroVAX3100,Vax4000,Vax3300, Amstrad 8512, Tatung einstein, Apple II)

That's an interesting collection you have there. Those plugs were on a Toshiba HX-10 + tape drive, Atari STe and a Spectrum 128 +2.

I've got a few pics. I'm sure techiedave wont mind the intrusion on his thread

I made some stickers for the Speccy to cover up some scratches on the case.



Photo of my C64 when I first bought it and one after restoration. Bonus shot of the busted plug it came with. You can see where it had been arcing and burnt the inside brown.

Dribble

128K :swoon:

[Halmyre]

JustALooseScrew said:

Halmyre said:

Oh yes. Cursing and swearing trying to wrap the bare wire round the post and screw it down without it unravelling and escaping. And then finding the cover lying on the table laughing at you - "hey, you forgot to thread me on first! Ha ha, loser!"

Isn't there an old saying "It's only a mistake if you do it twice."?

I've had one too many 'Ha ha, loser!' moments over the years more often than not with those bulkhead cable glands, it's even funnier when running six cables into an enclosure you realise you've left a key piece off every cable. Then cursing and getting yourself into a hissy fit you realise that even after rewiring the whole lot No. 6 is still devoid of some parts.


These are the buggers:

Oh yes, been there done that. Repairing a worn seven-core cable on a caravan. Waterproof box, terminal block, two cable glands. Feed one end of cable through hole, fix wires to terminal block, forget gland nut, swear loudly and redo it all. Feed second cable through, fix wires to terminal block and you can guess the rest...

[anonymous-user]

I thought the twisting of the internal wires was quite novel on this little beauty I took apart yesterday