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Old 10-03-2012, 11:53 AM   #1
Alphaform
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EL34's in an AC30

If I switched the 84's to 34's in my AC30C2, what kind of tone would I be more expecting? Like a more Marshally crunch?

I was thinking about doing this. Although I'm unsure if it's even possible

Cheers.

Last edited by Alphaform : 10-03-2012 at 11:55 AM.
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Old 10-03-2012, 11:56 AM   #2
Cathbard
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Can't be done. They don't even use the same sized sockets.
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Old 10-03-2012, 11:57 AM   #3
Alphaform
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Quote:
Originally Posted by Cathbard
Can't be done. They don't even use the same sized sockets.


Yeah thought something wouldn't work with it.

Ta anyway.
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Old 10-03-2012, 11:58 AM   #4
GABarrie
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a) the sockets are the wrong size so you would need to punch larger holes in the chassis and fit new sockets

b) the power transformers won't be able to handle the higher current draw, or the higher power output and the impedance will be wrong

c) the cathode biasing resistor value would be wrong and probably not high enough wattage rating to handle the current, plus would probabaly be far too low a bias and would result in the 34s red plating

in short... lots of work, money, and you will end up destroying your amp
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Old 10-03-2012, 01:02 PM   #5
Kevin Saale
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Quote:
Originally Posted by GABarrie
a) the sockets are the wrong size so you would need to punch larger holes in the chassis and fit new sockets

b) the power transformers won't be able to handle the higher current draw, or the higher power output and the impedance will be wrong

c) the cathode biasing resistor value would be wrong and probably not high enough wattage rating to handle the current, plus would probabaly be far too low a bias and would result in the 34s red plating

in short... lots of work, money, and you will end up destroying your amp


Pretty much. Not to mention, it'll still sound more like an AC30 than a Marshall Those 18w marshalls don't sound like AC30s even though they run el84s, just a little food for thought.
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Old 10-03-2012, 01:05 PM   #6
Cathbard
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Quote:
Originally Posted by Kevin Saale
Pretty much. Not to mention, it'll still sound more like an AC30 than a Marshall Those 18w marshalls don't sound like AC30s even though they run el84s, just a little food for thought.

Indeed. An 18W'er sounds like a plexi and is running EL84's.
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