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Old 20th June 2004, 06:29 AM   #1
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Default Metal VS Glass

Hey guys,

Does a tube in metal package sound different to an ordinary glass one?

For example, 6V6 Y and 6V6 GT...
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Old 20th June 2004, 06:36 AM   #2
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Only if you think it does. There's no electrical reason for it so it's up to you.

I think they sound tinny. Dark, concealed sound stage.

Tim
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Old 20th June 2004, 07:09 AM   #3
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I think they make music sound processed, compressed, bland, tinny--

Canned.

Best,

George "I Kill Me" Ferguson
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Old 20th June 2004, 11:53 AM   #4
benny is offline benny  Australia
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if the metal has magnetic properties or is earthed for some reason, then it will effect the sound... but it's not going to make your sound more tinny... more likely less tinny.. although i doubt you'd hear a difference at all because it's pretty unlikely the metal case will have much effect at all really... just like using a metal shield around an otherwise glass preamp tube... because this is earthed, it creates a capacitance to ground, and this is fact, just look at a data sheet, the output capacitance goes up in a relatively big amount, but this is 'relative' to what it was, and in reality, this capacitance is very small... thing is, does anyone hear what a shield does apart from it's intended job of reducing interferance??? so fear not... i think the advantage of metal tubes would be if you drop them on a hard floor, it's only the internal parts that will break, so you don't have to clean up the glass if you break it! now that's gotta be good eh?

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Old 20th June 2004, 11:04 PM   #5
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Actually, a 6V6Y consists of a miniaturized glass tube sealed in a metal case...
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Old 21st June 2004, 01:57 AM   #6
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Hi,

Quote:
thing is, does anyone hear what a shield does apart from it's intended job of reducing interferance???
Errr...sorry, yes I definetely do hear the difference most of the time depending on what valve/circuit it's being used.

Quote:
Actually, a 6V6Y consists of a miniaturized glass tube sealed in a metal case...
That's not the case of all metal tubes but quite alot are indeed just a glass tube with a metal can around it.
Some of them also have a bad reputation of being microphonic and gassy.
Other than that....I don't like'm.

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Old 22nd June 2004, 03:45 PM   #7
chops is offline chops  United States
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I've been known to be very gassy at times!

As far as metal tubes sounding different, I woud think that it wouldn't be any different than just switching out brand X tube with brand A tube, being glass or metal.

I mean, that IS the point behind rolling tubes, right?
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