| Taking a wild guess here about cross-over design [message #14650] |
Sat, 31 July 2004 10:31  |
wunhuanglo
Messages: 912
Registered: May 2009
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Illuminati (2nd Degree) |
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Somebody's "eBaying" a pair of ancient crossovers. They incorporate what looks like a standard-base porcelain bulb socket. Probably the same intent as the Eminence crossovers that use a 12V bulb for tweeter protection? If so, it a pretty interesting object lesson in the evolution of a design concept.
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| Not that I know nuthin' about nuthin', but... [message #14657 is a reply to message #14655] |
Sun, 01 August 2004 07:12  |
wunhuanglo
Messages: 912
Registered: May 2009
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Illuminati (2nd Degree) |
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Not that your hypothesis is impossible, but I find it extraordinarily implausible. This is a commercial product – what could possibly be more inconvenient than a porcelain as a connector for anything other than a light bulb? I looked up a DIY ESL amplifier design from the same era (1968). In that design the author used light bulbs “to equalize the voltage to the capacitors” in the high voltage section of the output. After reading that, I remembered that Nelson Pass has an amp design that uses four standard base light bulbs in some sort of regulation scheme. It may not represent an component of a crossover section as I originally thought it might, but I find it very difficult to believe that it’s intended to terminate the panel leads either.
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| Re: Not that I know nuthin' about nuthin', but... [message #14658 is a reply to message #14657] |
Sun, 01 August 2004 10:36 |
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Wayne Parham
Messages: 18723
Registered: January 2001
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Illuminati (33rd Degree) |
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That might be true too. You're right that the socket would be inconvenient as a connector. But it kind of seems like a large device to use as a as a current sensitive resistor and/or fusable link. I would have though a smaller device could have been used instead. Maybe it is a fuse socket? Remember the large current fuses that were used in house wiring panels before circuit breakers became common? Do you think maybe one of those kind of fuses is used in the socket? It would be interesting to know.
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