I have just substituted the Shanguang triple-mica 12ax7s for the stock tubes,it's a nice improvement and not expensive.I was turned on to them by a good friend,heavily into tube rolling.These list for $10-12/matched pair and as I was told are reproductions of the Telefunkens.My friend has had them in his amps for three years,so the comments about a short life-span maybe untrue-time will tell.
Next will be the 12au7s-have some neat French cryo'd ones to try.Hope they work as well,seeing that they ran $45/ea.
Tom
Next will be the 12au7s-have some neat French cryo'd ones to try.Hope they work as well,seeing that they ran $45/ea.
Tom