Baron wrote in message
...
N_Cook Inscribed thus:

That last more than 5 years before the gap in the socket pin opens up
enough to break contact on the grid pin?
octal EL34 type valves seem to have pins about 2.2/2.3 mm diameter.
Failing socket pins , measured cold , a gap in the Y as large as
2.1mm. Luckily I've found a NOS McMurdo , British made socket that I
will rob 4 of the pins from, for the 4 grids, as physically compatible
in the base matrix. These unused ones measure 1.7/1.8mm in the active
part of the Y gap. The failed ones from 2007 have reduced metal in the
region where its required , the 2 prongs , except for a swelling at
the contact point ,
measure in cross-section .7x.9mm down to the 2to1 middle of the pin .
The older ones measure .55 x 1.4mm , the 1.4mm dimension in the sense
that you
want it , for long-term/hot-cold cycling strength.
Any modern makes have engineering drawings disclosing these pin
dimensions ? has the metal composition changed/ trade secret
formulation lost?

Didn't you see my post a while ago where I said I had found a brand new
pack of five !

--
Best Regards:
Baron.

A sustainable source of robust sockets?

Or even a source of pins of part spiral type perhaps , scaled up to 2mm of
turned pin socket type say or even scaled up QM. I've only once come across
bent pins on octal valves (owner bent them for easier access) . Just to
replace the grid pins of modern sockets, if not the remainder.
What else uese 2 to2.2mm size pins these days that has mating sockets?