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630TS capacitor reforming ramble
I read with interest the different electrolytic capacitor approaches for restoring these sets. I was in the very beginning of a restoration on one, so I thought I would experiment some. I measured the electrolytic caps in my 630 and found them in this state:
Cap. val@volts Measured Val Measured ESR C220 80@150 49 .84 40@450 33.4 3.94 10@450 9.1 1.84 C224 20@450 OPEN OPEN 80@340 OPEN OPEN C221 40@450 40.6 .78 40@450 38.2 1.08 10@450 10.5 3.32 C225 250@10 OPEN OPEN 1000@16 OPEN OPEN C222 80@450 59.6 .72 50@450 37.9 .99 C223 40@450 13.2 11.3 10@450 5.3 4.9 10@350 4.05 3.9 I built a computerized capacitor reformer based on my Sencore LC75 procedure along with tips from the pros here in the forums. I tried reforming C223 but it could not reach its working voltage at low leakage. I ended up restuffing C224, C225, and C223 and reformed C220, C221, and C222. I also replaced all of the paper caps and out of tolerance or open resistors. Attached are pictures of the set, original wiring including old fixes, the cap reformer in action, the recapped set wiring, and a test pattern with the set using the three reformed electrolytics. Last edited by Zenith6S321; 02-16-2015 at 06:32 PM. |
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