15th Nov 2021, 6:27 pm | #401 |
Nonode
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
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Re: Commodore PET 2001 voltage regulators
That's odd Tim. I suppose I could be mistaken about the three prongs. Let's see if anyone else has a view.
Alan |
15th Nov 2021, 6:33 pm | #402 | |
Pentode
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Location: Falkirk, Scotland, UK
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Re: Commodore PET 2001 voltage regulators
Quote:
Tim. |
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15th Nov 2021, 7:09 pm | #403 |
Dekatron
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Location: Newcastle, Tyne and Wear, UK.
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Re: Commodore PET 2001 voltage regulators
I have to admit that, with the smaller bit being electrically connected to the two longer bits, it does seem that the smaller bit should go inside the tube as well. I could be wrong though.
Did you (Tim) remember what we said about how pinching the round centre part on the cap from the sides should make the two prongs retract inwards towards each other so they will fit through the hole they are supposed to grab onto from behind when they are released? If you do that, does that allow the prongs + extra bit to go deeper in? I wonder if AJ or Colin might be able to look to see what theirs looks like in-situ, after discharging them first of course. Maybe Colin might remember having to negotiate the same problem. The main thing to note is whether there is a dark coating on the main body of the tube, and then to observe how close to the edge of the hole it approaches. Normally there is a fairly wide un-coated gap surrounding the hole. If that's the case here as well then maybe that bent 'hook' is supposed to be the 'spring' which pulls the hooks on the ends of the prongs firmly up against the inside of the hole, in which case it may well be meant to rest on the outside of the hole. Last edited by SiriusHardware; 15th Nov 2021 at 7:18 pm. |
15th Nov 2021, 7:36 pm | #404 | |
Nonode
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Re: Commodore PET 2001 voltage regulators
Quote:
Alan |
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15th Nov 2021, 7:38 pm | #405 | ||
Pentode
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Re: Commodore PET 2001 voltage regulators
Quote:
Thanks again, Tim. |
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15th Nov 2021, 7:46 pm | #406 |
Nonode
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Re: Commodore PET 2001 voltage regulators
Having caused the confusion in the first place Tim, I was obliged to take a look. Better still the PET is still working!
Alan |
15th Nov 2021, 8:03 pm | #407 | |
Pentode
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Re: Commodore PET 2001 voltage regulators
Quote:
Tim. |
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15th Nov 2021, 9:08 pm | #408 |
Pentode
Join Date: Oct 2021
Location: Falkirk, Scotland, UK
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Re: Commodore PET 2001 voltage regulators
Everything has been put back together and the monitor mounted onto the PET. I'm pleased to say it all still works!
That's a big relief, and not something I'd really like to do for quite a while again! A really fiddly job trying to get the CRT in (and out) of the case. Thanks again for all your help and support. The gloss paint had hardened well, and it certainly looks better inside the monitor case now. Hopefully the rust is now a thing of the past. The PCB also had a light clean, as well as the anode cap. I've kept the cable airbourne as SiriusHardware mentioned (sorry, I had to google LOPT!), and it's not touching anything, nor the case. Next job is to finish off the case, then we're onto the keyboard. Tim. |
15th Nov 2021, 10:02 pm | #409 |
Dekatron
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
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Re: Commodore PET 2001 voltage regulators
Oops, I did it again, yes, LOPT = Line OutPut Transformer, that chunky thing which the thick, high voltage cable comes out of.
It looks very smart now, well done. |
16th Nov 2021, 2:09 pm | #410 | |
Octode
Join Date: May 2012
Location: Perth, Scotland
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Re: Commodore PET 2001 voltage regulators
Good work. The PCB is nice and clean too.
Getting there. Colin. Quote:
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16th Nov 2021, 6:40 pm | #411 | |
Nonode
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Re: Commodore PET 2001 voltage regulators
Quote:
Alan |
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17th Nov 2021, 6:08 pm | #412 | ||
Octode
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Re: Commodore PET 2001 voltage regulators
You have no sense of adventure.
Colin. Quote:
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17th Nov 2021, 6:30 pm | #413 |
Nonode
Join Date: May 2004
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Re: Commodore PET 2001 voltage regulators
True and I can't type accurately either (skake!?).
Alan |
17th Nov 2021, 10:24 pm | #414 |
Pentode
Join Date: Oct 2021
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Re: Commodore PET 2001 voltage regulators
The case has now been cleaned, so they keyboard beckoned. It turned into a rather large job. On taking out the keyboard, I was hoping I might get away with what Alan suggested; however, the keyboard was absolutely filthy. So I ended up having to remove the keycaps in order to give it a good clean, then the keyboard itself. After a lot of cleaning, it was put back into the PET and all works as expected. So another job off the list!
Tim. |
17th Nov 2021, 10:26 pm | #415 |
Pentode
Join Date: Oct 2021
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Re: Commodore PET 2001 voltage regulators
All of the exterior cleaning has now been done; screen, casing, and keyboard. The rust has been addressed in the monitor case, and the very small specks on the case have had a drop of the rust neutraliser. The whole lot has then had a polish. I don’t think I’ll do anything further as I think it looks okay now.
With that now done, it’s time to address the inside of the case (mainly dust again in the bottom under the PCB), and the transformer. It's getting there. Tim. |
17th Nov 2021, 11:13 pm | #416 |
Nonode
Join Date: May 2004
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Re: Commodore PET 2001 voltage regulators
Stunning! Strange to think that this thread started with a question about voltage regulators.
Alan |
17th Nov 2021, 11:34 pm | #417 |
Nonode
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Re: Commodore PET 2001 voltage regulators
The two prongs fit in the crt cavity, the third bit stays in the final anode rubber cap, don't worry about it, it is only a monochrome crt, the voltages here are fairly low compared to colour tubes.
__________________
I don't suffer from Insanity. I enjoy every minute of it. |
18th Nov 2021, 11:53 am | #418 | |
Pentode
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Re: Commodore PET 2001 voltage regulators
Quote:
Thanks once again! Tim. |
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