- Capacitors at RF - 3 Updates
- Commodore 1084S monitor - 1 Update
| Cursitor Doom <cd@noreply.com>: Jan 19 10:11PM On Tue, 19 Jan 2021 13:32:52 -0800 (PST), Phil Allison >I hope he is only a teenager. >If an adult - he has zero chance of ever recovering and becoming a functioning human being. >...... Phil I'm x-posting this to sed so the regulars there can see don't confine your obnoxiousness to that forum alone. The question I posted originally wasn't addressed to you. I always begin my posts to "Gentlemen" in the hope arsewipes like you will read no further and go straight to the next message. Didn't work this time did it? Why you saw fit to overlook that AND to stick your unwanted nose into a subject you know *nothing* about. You think aligning the IF stages of some old radio makes you and expert on RF? You're a no-mark, Allison. You don't design shit. You fix up stuff; that's all. And audio stuff at that - NOT RF. And no one needs a PhD in transmission line theory just to twiddle some pots in a chain of IF cans. A trained chimpanzee could do it. So you were strutting your stuff on a electronic design forum when you know nothing about design. You ignored the fact I'd addressed that post to *gentlemen* and you chipped in your 2c on a subject you know FUCK ALL about AND were foul-mouthed and abusive into the bargain. All probably because you were pissed as usual. You have nothing worthwhile to contribute so just fuck off back to the gutter where you belong, you hopeless drunken PoS. |
| Phil Allison <pallison49@gmail.com>: Jan 19 09:21PM -0800 Accursed Doperote: > probably because you were pissed as usual. You have nothing worthwhile > to contribute so just fuck off back to the gutter where you belong, > you hopeless drunken PoS. **Wow !!! That is *quite* a "dummy spit " .......... Bet the horroble puke punched him mom and chucked his toys about when he was 4 or 5 years old. And he's still doing it !!!!!!!!!!!!. ...... Phil |
| "Peter W." <peterwieck33@gmail.com>: Jan 20 03:45AM -0800 Three Things: 1. Tourette's Syndrome can be partially controlled with strong drugs. But the individual most take those drugs on schedule. This individual does not. 2. This particular individual is nearing its end-of-life with nothing to show for it, alone, and nothing to pass on. "Bitter" about covers it. 3. And, it never gives a good result to argue with the Village Idiot in any case, as said idiot is immune to reason and unencumbered by the thought process. Have a nice day. Peter Wieck Melrose Park, PA |
| Rayner Lucas <usenet202101@magic-cookie.co.ukNOSPAMPLEASE>: Jan 20 09:04AM In article <a5e3b4a1-a1ca-4343-9d1b-d7b44b6490b3n@googlegroups.com>, george.alibinisis@gmail.com says... > private message that his monitor is with an expert at the moment. > it definetely looks like some harmonic but my knowledge in CRTs is > very little at the moment - learning every day. Okay, if there are 7-8 lines it's not mains frequency. I'd say it's still worth checking the PSU output voltages for stability, though - it will help to know whether you can rule that section out or not. The number of horizontal lines suggests the unwanted oscillation has a 350 - 400Hz component, which might be a helpful clue. If investigating the PSU doesn't reveal anything, here's how I'd look at it. You've got a scope and a schematic annotated with expected voltages and waveforms. The problem shows up on the display, therefore it must be present among the signals and voltages that go to the CRT and deflection yoke. If you can figure out which one(s), you can then trace it back to the origin from there. It seems highly unlikely to be anything to do with the EHT or the focus grid voltage, which is good because those are the ones I'd least like to be messing with. It doesn't look much like a deflection problem either, as from the pictures on the edaboard thread I can't see any actual distortion to the image on screen. As far as I can see, that mostly just leaves the: +12V line +125V line -20V line RGB signal lines going to the CRT neck board as the likely candidates. The safety guidelines at https://www.repairfaq.org/sam/monfaq.htm#montrbs include some advice for staying safe when investigating a running monitor; I particularly recommend the bit about only ever connecting/disconnecting test leads when the monitor is unpowered and unplugged. Let us know if you manage to narrow it down. Rayner -- Big-8 Management Board: https://www.big-8.org Homepage: http://magic-cookie.co.uk |
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