-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 On 2015-08-11 03:08, James Knott wrote:
On 08/10/2015 08:51 PM, Carlos E. R. wrote:
I reviewed them when I was a student, replacing several of the capacitors and some browned resistors. Apparently electronics last for ever, but it is not so.
One problem vacuum tube equipment had was heat, which caused a lot of components to fail prematurely.
Yes. For that reason they were typically built in a box with a metal grid, horizontal, some centimetres from the bottom. The lamps were above, and the passive electronics and wiring, below, where it was cooler. And the components were built for the heat: those things could easily survive half a century. Do you know that valve electronics work better than solid state under radiation? Like in space. Or in a nuclear plant.
We had a tube TV when I was a kid and the top of it was *HOT*! Properly rated devices don't normally fail on their own. It generally takes something else, such as a power surge to degrade them.
Oh, they do now. Things are not built to last. Programmed obsolescence. - -- Cheers / Saludos, Carlos E. R. (from 13.1 x86_64 "Bottle" (Minas Tirith)) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iF4EAREIAAYFAlXJU2UACgkQja8UbcUWM1yBfwD/XtbV6P/eLti+CiMvn81sb75x +9RSb3L17RSk7999a1IA/jc09ydhnws9IR0SBuUnyHZ21U6zlEOqXUGN8B7wFcXg =jMUx -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org