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Bruce Esquibel <bje@ripco.com>: Dec 16 12:28PM > I have two of them that run without problems. I also have about 5 > customers that have them. Batteries have been lasting about 5 years > and no lightning bolts or smog problems.   No clue unless the OP chimes back.   In the post he said it was XS1500 on the front and BX1500 on the back, which was how the ones I had were marked. Since the one you show is also an XS1500, maybe the BX is something with year or series type. I do notice though, some of the current ones are BX1500G, so maybe they are all like that. No letter is maybe the first run?   It still doesn't change the fact those white ones were crap.   -bruce bje@ripco.com

N_Cook <diverse@tcp.co.uk>: Dec 16 09:02AM On 15/12/2015 20:46, Dave Platt wrote:   > As to playing the disc... the cat's meow might be to gain access to an > ELP laser turntable, which doesn't use a physical-contact stylus at > all. No wear... but not cheap nor common.   There is also a step and repeat low power microscope multi-capture system , then auto stitched images, then wiggles converted to sound.

adrian@poppyrecords.invalid.invalid (Adrian Tuddenham): Dec 16 09:40AM Adrian Tuddenham <adrian@poppyrecords.invalid.invalid> wrote:   [...] > A straightforward variable circuit that can be connected directly to the > pickup is shown at: > http://www.poppyrecords.co.uk/other/Equaliser/Equaliser.gif   I initially uploaded the wrong circuit, the correct one is now shown.   Apologies for any confusion that caused.     -- ~ Adrian Tuddenham ~ (Remove the ".invalid"s and add ".co.uk" to reply) www.poppyrecords.co.uk

jurb6006@gmail.com: Dec 15 11:32PM -0800 >"Does it, though? I mean, you could save even more time by just >running all the caps through an ESR meter test and just replacing >those that fail. Given how fragile some of those old PCB traces can >be, I'd only want to replace the caps that really way out of spec. "   Not so much that, but the ones that matter. For example you could draw a graph of the dissipation of a vertical deflection IC (or transistors for that matter)against the ESR of the boost cap. Usually 100 - 330 uF in value these boost the Vcc to the ouptu stage during retrace. When the cap ESR rises the output circuit operates in linear mode longer to try and compensate. Usually, its dissipation is quite a bit higher before you see anything on the screen like a compression at the top or a foldover. It over heats and burns out and about 80 % of the time the tech finds it with a foldover after replacing the IC or transistors.   So there are CERTAIN ones you want to just replace or at least check. But things are out there with hundreds of caps and it might be impractical to change them all.   And another thing, I would highly recommend getting the unit working properly before recapping. Then, recap in steps, rechecking proper operation in between every one.   Maybe some people are lucky, but I have been where Murphy's law was strictly enforced. And Murphy himself told me "You make your own luck". (the story of Murphy is something I will post eventually but it belongs in another place)

"Gareth Magennis" <sound.service@btconnect.com>: Dec 16 12:41AM "Phil Allison" wrote in message news:6046f3c8-69b7-49ed-bb61-8d0ee0a337e2@googlegroups.com...   Gareth Magennis wrote:   > a > signal wire lying beside an earth wire. > I don't know what level of protection that actually offers.   ** Close to none.   The layout relies on the two plate wires being in close proximity so the out of phase electric fields cancel at a distance.       ... Phil         Thanks.         By the way, and off topic now, I had a young lad come to me today to ask about how he might learn how to digitally model valve amps for his University project. He was sent by a customer of mine who I've repaired valve amps for, and is a teacher at his college.   I recommended this book, as this is the one I first read to learn the basics, and I think it is quite good for that. Certainly taught me a lot. http://www.amazon.co.uk/Valve-Amplifiers-Morgan-Jones/dp/0750656948   Do you or anyone else have any knowledge/opinion of this publication, or anything else I could recommend him?     Gareth.

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