25 Jul
2005
25 Jul
'05
1:15 a.m.
For transmitting tubes (valves), yes, careful power-up
is
important, but for computer rated minis, not so much.
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.
Weak filaments that lead to burnouts and loose
elements that
lead to shorts generally get weeded out quickly, as the tubes
die prematurely.
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.
Lee.
.
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25 Jul
25 Jul
2:07 a.m.
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.
I am talking specifically about tubes in computers, not in
transmitters. Transmitter tube care is a different ball of wax.
If anything, the a slow power-up is probably
protecting the
power supplies more than the tubes.
Not in these transmitters. 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
7115
days inactive
7115
days old
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