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Strange part connected to flyback of Atari SC1224

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sandord
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Re: Strange part connected to flyback of Atari SC1224

Post by sandord »

Sideburn wrote: Fri May 09, 2025 12:50 am Wow a 5 year old thread and now I need help 😆

I have recently acquired an sc1224 monitor and the flyback appears to be shorter. Also see a crack on it.

It’s the exact same KF4825G white that snubber contraption in line with the anode cable.

I cannot find a replacement KF4825G anywhere. I found one that looks close to a match physically that is model 6174Z8005A but no idea if it is within the same specs.

Did the flyback work without the snubber? Anyone know of a compatible replacement or where I can find an original?
There's no place more appropriate for necromancing than a retro computing forum, isn't it? :D

OT: I ended up not replacing my flyback, mostly because it still worked (and still does) and I couldn't find a replacement part and I didn't want to resort to solutions I don't have enough knowledge for (like building a snubber on top of a different flyback model).

I've come to realize that retro flybacks that are sold as new may actually be scavenged parts. Even if I would have found a replacement part, it might look newer but actually be more worn than the flyback I already have. So I decided only to replace flybacks after they've gone bad. I know this includes accepting the risk of other parts dying along with the flyback, once it goes.
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rubber_jonnie
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Re: Strange part connected to flyback of Atari SC1224

Post by rubber_jonnie »

I think flybacks are a black art unless you truly understand what's what and can replicate factory wiring.

High voltage is notorious for finding any tiny failure in insulation so swapping anode cables is a risky business IMHO, especially if you have a tripler involved.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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