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The Advantages Of Tubes

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Rich Grise

Jan 1, 1970
0
Long time ago I picked up this story...Never bothered to get it
confirmed.
Here goes:
Apparently the US takes apart some Russian jet from a defected pilot.
(Sorry.. forgot when I heard this...maybe 20 years ago??)
Lots of tube technology was found in the jet.
The theory being that tubes are more resistant to damage from a
nuclear EMP.

It's true, they are, but that wasn't Russia's (more accurately,
the USSR's) motivation - it was that tubes were pretty much all
that they had at the time.

Cheers!
Rich
 
A

Anthony Fremont

Jan 1, 1970
0
MooseFET said:
If vacuum is clean, why do they make vacuum cleaners? Answer me that!

The same reason that they make hot-water-heaters. It's a marketing
demonstration that shows that good sales ability beats a product name every
time. Getting people to buy something they obviously don't need.
Yes but these heaters are run on 6.3V which is the squareroot of 39.69
and therefor obviously evil.

That's a rumor mindlessly passed thru the generations. If you check, you'll
see that they actually run on 6.48V which is the square root of 42, the
most-perfect number.
Smart people move to a warm climate.

That's what I thought, then I moved to houston. Smart people live anywhere
else.
When the tubes light the house on fire, a lot of wood gets burned.


Very few house burn coal for heat any more. Coal burning is a dirty
nasty way to make power much like tubes are a dirty nasty way to make
music.

Right, we now burn coal on a much more massive scale. We use it to
inefficiently generate electricity from heat, then transport it over long
distances while losing a large percentage to resistive/emissive losses.
This is usually done on poles cleverly placed so as to be directly in the
path of wayward automobiles, but then power company procedures are another
subject themselves. Then, what's left of the electricity is used to power a
heat pump and further reduce efficiency to a record low since the dawn of
heat generation. It's called progress.
The same is true of transistors. If you lived in a place that was
about 5 degrees K, you'd have to heat the transistors in your radio.
We all live in a warmer climate than that, even the foolish ones who
live in the north.

But what would you heat them with?
Tubes cause puppies to die.

Tubes should not be taken orally or rectally.
Those holes let the good sound pass through without effort. Tubes
contain magnetic materials. These lead to distortion.

Which is precisely what you want when you're an axe grinder.
They suffocate the sound.

No, they provide space for the sound. How much head-room could possibly be
built into a to-92? It must be like passing a kidney stone the size of a
grape. Imagine the excruciating effect on the sound. Tubes provide
unprecidented clarity too, have you tried looking thru a transistor lately?
How could sound pass thru something like that and not come out all muddy? I
mean really......
 
R

Rich Grise, Plainclothes Hippie

Jan 1, 1970
0
It's true, they are, but that wasn't Russia's (more accurately,
the USSR's) motivation - it was that tubes were pretty much all
that they had at the time.

Which doesn't even take into consideration that it could have been a
setup - i.e., they gave the guy their oldest airplane and said, "Go
defect." ;-)

Cheers!
Rich
 
D

D from BC

Jan 1, 1970
0
Which doesn't even take into consideration that it could have been a
setup - i.e., they gave the guy their oldest airplane and said, "Go
defect." ;-)

Cheers!
Rich

lol :)

Russian Air Tower: "Vladimir stole an old jet and is heading to the
US."
Russian Commander: "Let him go.....His flying sucks.. Besides, it'll
fool the Americans into a false sense of security in believing Russian
technology is inferior".
D from BC
 
J

jasen

Jan 1, 1970
0
Whether a 1968 VW is more fun would be strictly in the eye of the beholder.
My youngest son had a 1968 VW van, which at 40 mph felt less controllable
than a modern car at over 100.

Do you think the fact that it was a van had anything to do
with that? centre of gravity and all that...
Any van with unpowered steering will be hard to
drive in cross-winds (especially erratic cross-winds).
Those VW vans were light in the front too which didn't help
much erither unless you wanted to take them off-road.

Bye.
Jasen
 
J

joseph2k

Jan 1, 1970
0
D said:
Long time ago I picked up this story...Never bothered to get it
confirmed.
Here goes:
Apparently the US takes apart some Russian jet from a defected pilot.
(Sorry.. forgot when I heard this...maybe 20 years ago??)
Lots of tube technology was found in the jet.
The theory being that tubes are more resistant to damage from a
nuclear EMP.
D from BC
There is a measure of truth to that, particularly for equipment that is
powered down. EMP itself is not all of the problem, it is preceeded by a
blast of high energy quanta, ionizing air, water, solids and more. While
everything is still jangling around really uncommonly large voltages are
induced, leading to breakdowns of many kinds of parts, especially
semiconductors.
 
H

Homer J Simpson

Jan 1, 1970
0
Do you think the fact that it was a van had anything to do
with that? centre of gravity and all that...
Any van with unpowered steering will be hard to
drive in cross-winds (especially erratic cross-winds).
Those VW vans were light in the front too which didn't help
much erither unless you wanted to take them off-road.

Vans and SUVs drive like a bowling ball taped to a roller skate.
 
J

John

Jan 1, 1970
0
Tom said:
Guess you haven't been using ceramic external anode valves...


Oh, yes...that's a fun thing to do with valves. Connect filament
transformer to 833 bottle. Connect -200V--+200V variable power supply
between the grid and the filament transformer center tap. Connect
3000V power supply between the plate and the filament transformer
center tap. Apply power to the filament transformer; allow the
filament to warm up to normal operating temperature. Turn on the grid
power supply and adjust it so the grid is -200V relative to the
filament. Turn on the plate power supply. Monitor the current in the
plate supply. Make the filament voltage more positive, stopping when
the plate current reaches 0.3 amps. If nothing spectacular happens
within fifteen minutes or so, crank up the grid voltage a bit more
till the plate current reaches 0.4 amps. Continue in this fashion
till something happens. Observe the new shape of the glass envelope.
You've done the first part (the "melted" part). Now try to figure out
the "re-used" part for this sample.

Cheers,
Tom



Reminded me of the Motorola Motrac mobile radios that happened to get
the mike stuck. It would melt a nice little hole between the top plate
pins of the 5894 tube. The insides would turn white when they vaporized
as the air and oxygen hit them.

John
 
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