Why would you
buy audio tubes, or valves as we call them over here, from
eBay, when they're cheap enough in Maplins?
Because a 12AX7 (ECC83) made by ICC and an identical 12AXY (ECC83) made by
Telefunken makes ALL the difference.
Well this is a good read on why tubes may sound different.
William Donzelli
aw288 at
osfn.org