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In Reply to: RE: Jim, just to be clear... posted by FenderLover on April 04, 2016 at 21:42:50
The Philips family tubes (and companies that used Philips machinery/parts later such as Ei) are the ones that use the high inrush current heaters. There are others like (IIRC) the 2E26 that flash at startup because they are designed to warm VERY quickly.
I can only recall seeing this on the Philips miniatures.
Follow Ups:
You're just jealous of all that cool looking equipment that guy has.
If I had all that testing equipment I'm pretty sure my house would have burnt down by now.
If you take note most of it pretty old too. I suspect, as Jim alludes to that it's there for show. Or maybe he's a collector and that's his storage cabinet.
Edits: 04/08/16 04/08/16
I'd be willing to place a bet that says most of that gear never gets used. I have the same thing occur here. I don't have as much test gear as shown in that picture he posted, but even with less gear I end up using the same relatively few pieces a lot - while the rest just sits. I bought one of the real nice refurbished Keithley units that Parts Express had late last year, really nice units - and I haven't even opened the box yet!
I have an American 12AU7 that I believe is Sylvania that flashes. Strangest thing.
I have also run across an occasional brand that also flashes. I had one Russian tube do that but perhaps, those tubes are actually defective or about to experience a short. Maybe, it is wiser to let that one sit on the sideline? regards, dak
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