Page 2 of 10
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 13:20
by rubber_jonnie
Right, so the axials and bipolar caps arrived today, axial removed at lunchtime and boy do those Atari ground planes suck up a LOT of heat :fire: :fire: :fire:
Will finish off removing the bipolar caps later, and then get the new ones in this evening and we'll see where we're at.
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 13:28
by stephen_usher
*crosses fingers*
You never know what causes these things. Analogue electronics is black magic. :-)
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 14:08
by rubber_jonnie
stephen_usher wrote: 30 Mar 2022 13:28
*crosses fingers*
You never know what causes these things. Analogue electronics is black magic. :-)
The finger crossing is appreciated!!
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 17:38
by rubber_jonnie
stephen_usher wrote: 30 Mar 2022 13:28
*crosses fingers*
You never know what causes these things. Analogue electronics is black magic. :-)
Well, no difference really, bit bloody annoying, as it was all fine (Same wiring, socket and cables) as in the 800XL, suggesting it's something in the 600XL.
Might go and see if FJC can give me any ideas.
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 19:36
by rubber_jonnie
Ok, been chatting with FJC, who also asked about my problem, Candle which is awesome.
Have retried the linear PSU, with any nearby SMPSUs unplugged, and also tested in a different TV in another room with no nearby SMPSUs, and the problem remains. So that rules out nearby interference.
I also retried the 65XE, and that has no shimmer either, so it is definitely the 600XL. Now wondering if it's picking up interference from the ICs under the VBXL, so that's another route to check.
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 20:03
by stephen_usher
Wrap everything in grounded tin foil. I'm sure it'll be fine then. Hehe
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 21:22
by rubber_jonnie
stephen_usher wrote: 30 Mar 2022 20:03
Wrap everything in grounded tin foil. I'm sure it'll be fine then. Hehe
You may laugh, but the thought had crossed my mind!
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 21:32
by PhilC
51b8e89ceab8eaa87d000009.jpeg.jpg
Seemed appropriate
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 22:15
by stephen_usher
Just how shimmery is it?
Surely it's nowhere near as bad as the chroma jailbars my C64 has. (Yes, chroma, not luma. If it were luma it would be less noticable.)
Re: A visually impaired duo - VIC-20 and Atari 600XL
Posted: 30 Mar 2022 23:03
by rubber_jonnie
stephen_usher wrote: 30 Mar 2022 22:15
Just how shimmery is it?
Surely it's nowhere near as bad as the chroma jailbars my C64 has. (Yes, chroma, not luma. If it were luma it would be less noticable.)
Pretty shimmery, it's like a very low sine wave going up the screen, but very noticeable. I did post a link to a video further up.
It's rgb to SCART, but also uses composite for sync as far as I can tell.