On Mon, 25 Oct 2004 17:40:45 -0400, "arizona cowboy"
wrote:

lots of solid advice snipped for bandwidth

(avoid usa and chinese EL34)

The Chinese part is obvious, but the USA part may seem
strange. But it's good advice for use in lots of antique
amplifiers. The American 6CA7's seem to motorboat in
bone stock, up to speed, all good stock values, machines.
FWIW.

Chris Hornbeck