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Yesterday was a marathon recap day! I'm not a very fast solderer, I have big hands, a 30 watt iron, and can't friggin' see close up through my glasses anymore (I'm resisting bifocals). And some of those caps are in VERY tight spots, particularly the two that were in the metal box in one corner of the chassis..it took forever to finagle those out and then in again.
I still have the HV section to tackle today, but I feel I'm on the downhill side!
Here's a couple noteworthy events:
The parts list in the SAMS photofact appear fairly accurate. In general, in replacing the paper caps, I ordered one or two spares of each, in case I screwed up and ruined some, and that's about what I ended up with. EXCEPT the .05 value. I ordered 11 of them, and I'm pretty sure I ordered at least two spares and maybe three, because it uses far more of them than anything else..and I only have ONE spare left.
I will say this: I didn't take into account the productions changes bulletin when I ordered caps, primarily because I didn't think of it until after the order was placed, so that could account for coming up "short"...glad I ordered extras!
There are a couple other values that I have extra leftovers of, and that might coincide with the "shortage" of .05's.
MOST notable is that I came up one short on 10uf 25 volt electrolytics. There is only one listed on the parts list (I didn't order any spare electrolytics, primarily because of expense, and not being familiar enough to know what I might use in the future, and I might lose them down the road anyway...you should see my shed..I figured they're a tad more durable with their aluminum housings, too) Turned out there's one in the "main chassis", and there there's another one "hidden" inside the aforementioned metal box in one corner of the chassis. The SAMS photofacts photos show it there, with the cover off the box, but there is nothing at all denoting it's existence. None of the usual arrows corresponding to SAMS location numbers point to it. Seems it was missed somehow. I didn't find it in the production changes bulletin either. Luckily it's a value that our local Radio Shack appears to stock, for a couple bucks, so I'll go get one today and get it in there.
Evidence of prior replacement caps: In one case, location C2 on the SAMS, calls for a 50uf 150 volt electrolytic. What was actually there was a 16uf 150. It's listed as a "filter". Don't know the result of such a change, but it's back to the value as listed in SAMS. I'm sure it was an early replacement, as it was soldered to a cut "pigtail".
There was also a couple older plastic caps in there. A HUGE Mallory .5 "Plascap" and a plastic Sprague.
Pretty much every old paper wax coated caps was "gooey". I saw in a previous write up by someone that they had to get the residue off their hands with Boraxo. I keep Boraxo around too! Works wonders!
I did not "restuff" any of the old cardboard or aluminum caps, but did leave them in place for aesthetics. Frankly, I'm not completely confident in my abilities, I've never worked with multiple can caps before, and figured if something goes haywire in the power up, I wanted to be able to see, smell, and hear what was going on...and having everything out in the open will make replacement in that case easier.
Here's a photo of what appears to me to be a couple of obvious failures:
Last edited by CaryLee; 01-26-2014 at 10:25 AM.
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