local demolition of SAGE building

[William Donzelli]

> Not just the Tx valves, all the valves from the synthesiser
> on were protected, the exception was the audio pre-amp which
> were the cause of > 50% of shutdowns until replaced by solid
> state units.
> 
> > If anything, the a slow power-up is probably protecting the
> > power supplies more than the tubes.
> 
> Not in these transmitters.

I am talking specifically about tubes in computers, not in
transmitters. Transmitter tube care is a different ball of wax.

> New valves are always run for the guarantee life,

> modern valves
> are very poor, more than half are either DOA of fail within
> the guarantee period.

The 1970s were the beginning of the end. Most modern tubes suck.

William Donzelli
aw288 at osfn.org