19 Dec
2010
19 Dec
'10
7:17 p.m.
On 19 Dec 2010 at 13:43, William Donzelli wrote:
The big vendors would sell reject tubes to a 2nd tier
of vendors, but
these *never* had any logos or ID marks applied. They tried very hard
to keep their names in no way connected to these "seconds", and were
sold "out of sight, out of mind".
There *was* sort of a retread business going with some small vendors
testing old tubes, repainting them (bases in the case of a glass
tube; the whole thing in the case of a metal one). and a new logo
attached. You could pick them out by using a bit of lacquer thinner
on the base of glass tubes--the paint would come right off.
Come to think of it, I've even got a couple of 70's-era 7400-series
ICs that have been painted and relabeled. I suspect that was more of
a "house numbering" scheme, however.
--Chuck