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High voltages on Admiral 19A11.
Good evening gents,
I have been working on my Admiral 19A11 for some time now. This set has been completely recapped and all resistors replaced. Horizontal sweep transformer and filter choke have also been replaced. The set has been working fairly well, except for a vertical linearity issue (picture squashed at the bottom), which it has always had. I began to test voltages to try and track down this vertical linearity issue. However, I immediately noticed that all voltages were high across the entire set. Even at the 5Y3 tube (L.V, rect.). Pins two and eight should be 240VDC and are running around 266VDC. Pins four, and six should be 240VAC and are running around 292VAC. Any ideas where my issue may lie? My untrained, novice opinion is the power transformer. Nothing in the circuits really before the 5Y3 tube other then the power transformer. The transformer stays cool to the touch for about 40 minutes, then starts to warm up. Never gets too hot to touch, but does get fairly warm. Any advice would be greatly appreciated. Thanks.
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-Al |
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