01-18-2015, 10:35 PM
(01-18-2015, 08:00 PM)morzh Wrote: OK, good news is, the transformer seems to work (I usually only check the rectifier's voltage A/A and the filament; the rest of the voltages are also filaments and have little chance of open): the A/A is about 700V at 110VAC Vin and the transformer kept running about 10 minutes did not get warm at all.
Filling up Mouser order. Kirk, I am ordering 24-karat Rose Gold-plated resistors to go with the Copper Mershons and those beautiful brass caps of theirs, so don't spend much on beer.
Mike,
I can see that resistor you were talking about in one of Kirk's photos, it's definitely a replacement, it may still be functional if they put the slider in the right spot, but I don't think a 5K wire wound is a non standard size so you might as well pull it out and change it, save the adjustable for something else. How nice of Jackson Bell to mount half the resistors and bypass caps on that circuit board on one side, it brings back memories of my Rogers Ten-60. If Jackson-Bell was kinder then Rogers they will have added tie points on that circuit board, the Rogers had rows of drifting B.E.D code carbon comp resistors, with spade terminals, going through holes to act as tie points for the wiring. The missing 8 uf unit may have been an early dry electrolytic cap, the kind inside a rectangular cardboard box, even it it is missing I would assume that it is supposed to be there and order a replacement anyhow. What's inside that metal box on top of the chassis? A pair of bypass condensers?
If you want a set that gives that A.K 808A a serious run for it's money pick up a Rogers Ten-60, or equivalent, nice performing sets but a disaster in terms of mechanical layout, and rubber covered wire just for fun. Rogers was just like Grigsby Grunow in that regard, they were ahead of their time with the rubber/gutta percha wire, but you just have to work with it, or switch brands.
Regards
Arran