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- Jun 15, 2012
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Regardless, not taught in university anymore...which was my point. And that's back from the 1990s...it's now 20 years later.
What type of engineering did you study?
Regardless, not taught in university anymore...which was my point. And that's back from the 1990s...it's now 20 years later.
Tubes are passe, until the sattelites, power stations, comms sysyems etc are hit with an electro-magnetic pulse from an H-Bomb or solar flare coronal mass discharge hits that turns all the solid state silicon into silicon ash.......
the silver panels are polished and clear anodized. a clear coat would probably not work.
Physical Dimensions (in inches):
Amp chassis: 15.5" (width) x 12.5" (depth) x 3" (height). Attenuator adds 13/16" to the 12.5" depth and the RCA jacks add 11/16" more. Cone feet add 1 1/2" to the height and the stock Mullard EL34 tubes when installed add 3 3/4" more.
PSU chassis: 7 5/8" (width) x 12 3/8" (depth) x 3.5" (height). Cone feet add 1 1/16" to the height.
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Price - I'll leave that one for Justin.
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My posts that the silver version is somehow sonically superior have been purely in jest. Sorry that the sarcasm is so poorly transmitted via "the net". There is no "silver bullet" unfortunately.
Any spec for the lifetime of tubes has to take into account how the tube is used and how hard it is driven. I've been using the same set of EL34's in my Blue Hawaii's for the last 10 years and they still measure good. A lot of that has to do with them only being run at 50% of the max power rating and the old Mullards being bulletproof. With light use you can expect at least 5-10 years of usage from a set of tubes.
Couple of things, if the filament fails on a EL34 in a Blue Hawaii then the amp should be turned off in an instant and that tube thrown out. This happened to one of the amps I built and it took out the active cathode load. Another thing, don't ever use a tube if it indeed looks burnt or if the silver getter has turned white. The BHSE is a rather expensive tube tester...
Very interesting information... Justin , do you think the BHSE could be seriously damaged by output tube breakdown?
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yes, since i now have some of the front panels i can finish some of the amplifiers. i am currently setting up to do that next week.
Does anyone know what the expected life span of the EL34PH in the BHSE would be in hours?
Is there any way of telling when the tubes are close to their demise?