Too awesome for words

[John L]

Quite simply,...........fascinating!

 

[Michael Koster]

Too much to absorb in any reasonable time.

Reading his documents, he tests each electrode assembly (or partially completed tube) in a soft or partial vacuum and at low filament current *in inverted triode mode* to verify the geometry and alignment before going to the trouble of pulling high vacuum and sealing off.

The T-tube with 2 discs that glow purple is his final manometer. He applies up to 4KV and observes the purple glow to determine when the air is removed. I forget the name of it.

Incredible!

 

[tubee]

If i am correct on the first vid the explainer is Guido Tent!

Edit: I was correct!

 

[tubee]

In the original french vid he used coppered nickel iron leads through the glass. Nickel Iron has the same expansion coefficient as AR glass. The copper layer oxidises and mixes in the glass and makes a very good bond.

 

[abzug]

I wonder if it's possible by spending attention to get better results than in mass produced tubes. Because I would definitely pay for custom tubes

 

[tubee]

I wonder if it's possible by spending attention to get better results than in mass produced tubes. Because I would definitely pay for custom tubes

Most of the NOS tubes and new produced ones are indirect heated tubes, on the vids they make direct heated ones. Direct heated triodes can sound very natural but i have no experience with them.

They have to produce a lot of the same tubes and test/select them for I/U caracteristics.

 

[abzug]

Since tube behavior depends on geometry and not magic, it could be determined by simulation before anything is built. You cannot possibly argue that tubes are harder to simulate than jumbo jets, yet the latter are designed in simulators and their behavior is well known before any wind testing with models is ever done.

 

[Gordy]

Since tube behavior depends on geometry and not magic, it could be determined by simulation before anything is built. You cannot possibly argue that tubes are harder to simulate than jumbo jets, yet the latter are designed in simulators and their behavior is well known before any wind testing with models is ever done.

You miss the point, which is that any manual process is very susceptible to wide and varying tolerances. As such, completed assemblies would need to be checked to ensure that correct tolerances have been maintained throughout the manufacturing process.

: )

 

[sorenj07]

jumbo jets . . . are designed in simulators and their behavior is well known before any wind testing with models is ever done.

Unfortunately, plane behavior is NOT well known before a physical model is built. The industry has a good guess as to what will happen, but the science is simply not there to account for all the dynamics involved with flight. In other words, the plane could still explode. This is straight from a jet engine engineer (for lack of a better term) who visited my school a couple years ago. Worked for Airbus, I think.

 

[mark1777]

Wow that was true artistry...i've seen many techniques over the years, but the practiced ease with so many combined puts that assembly on the top of the list.

 

[Blaireau]

The builder of these triodes is a french radio amateur. (F2FO) He has also built small transmitters whith these triodes and has made contacts with some other hams. We can sometimes hear him on the 80 meters band. Bilan

 

[Gotez]

WOW, nice film!!

 

[DF96]

I didn't see any getter, but he did heat up the anode to drive off gases.

 

[speaker]

Every time I watch it I see another technique to master.

Such an inspiring film for any craftsman.

 

[Edmond Stuart]

Fascinating!
Look here to learn more about this remarkable fellow: F2FO
or for a translation in 'Franglish': Google Translate

 

[Edmond Stuart]

Getter

I didn't see any getter, but he did heat up the anode to drive off gases.

Instead, tungsten from the filament is used for this purpose. See pic.