[Peter Wieck]

On Jan 9, 1:40*am, Cipher wrote:
using a little Jolida 102b *while my Mastersound is down, *want a matched
pair of 12AT7s or any suitable substitute pair.. same manufacturer and
type, please.....

will pay , of course

With respect, the 12AT7 is a high-mu twin-triode. "matching" if it is
to be meaningful requires that the plate current for all sections of
both tubes be within 5%, between sections and from tube-to-tube. In a
*SMALL SIGNAL* tube. This will be disproportionately difficult
(therefore expensive) to achieve in any meaningful way. Further to
this, unless your source has both the correct equipment to determine
such matches *AND* is fantastically honest, you have no way of being
sure that the results are real in what you receive - unless you can
verify it yourself - back to the equipment.

Nor will your equipment require such matching. Nor will such matching
last more than the first few dozen hours of use, if that.

Just look for two good-testing, screened-for-noise-and-microphonics
12AT7s and save your money for something meaningful.

Peter Wieck
Melrose Park, PA