I just spent a few hours........

[Magnus Danielson]

>>>>> "EaSED" == Eric at Svetlana Electron Devices <svetengr at earthlink.net> writes:

Hi Eric!

 EaSED> ...going thru the Analogue Heaven archives.
 EaSED> Forgive me, this is my personal sore point:
 EaSED> It is very amusing to type "tube" into the search
 EaSED> function. Up pops all kinds of ravings (and we're only
 EaSED> talking tube-related ravings here...there is plenty
 EaSED> more on AH which makes the tube ravings look 
 EaSED> like serious scientific inquiry).

Skipped a few lines here...

 EaSED> Gotta say, Tim (if you see this).....it's a real cracker.
 EaSED> I loved the comment about frequency stability. It depends on the
 EaSED> circuit topology and components used, NOT THE TECHNOLOGY. (hey
 EaSED> Tim, ever actually done some experiments with tube oscillators?)

 EaSED> And what's this about bulk? Ever seen a subminiature tube?
 EaSED> Or a Nuvistor? Or a GE 7077 planar triode (the size of an aspirin
 EaSED> tablet)?

Eric, these comments really show that you discuss from completely
diffrent angles and basis of knowledge. You will not get my sympathies
for bashing or jokeing about someone that has not the knowledge and
information that you have. I am assuming a few things here, but the
general touch of your mail has some nasty aspects...

Instead, spread the knowledge in a friendly tone and you would see
less of these ravings about tubes. There is a myth about tubes being
unstable and all that. Helps us understand!

This tube-transistor standoff is similar to the
analog-digital. Knowledge helps, bashing doesn't.

 EaSED> Anyone want a flame war? We can start one about tube oscillators
 EaSED> and stability. Allow me to aver, that my thyratron VCOs are
 EaSED> SUPREMELY stable. More than I can say for any transistor VCO,
 EaSED> unless you deal with the issue of temperature compensation.
 EaSED> Regardless of whether you use linear control in a VCO, or
 EaSED> exponential. Or even if it's just a fixed-tunable oscillator.

Please, no flame war!

You may have a strong case on technical facts (you don't have to
convince me) but you may very well loose big in how people listen to
you and have respect for your person. Personally I rather see you
around to help enlighten us in a friendly tone.

So if you want to spread the word/interest/knowledge/use of tube
technology, go and loose that flame war idea into the round archive
and let's start some giving discussions instead!

Don't say that I didn't invite you to enlighten me, I did (and you did
send some pointers which I enjoyed - thanks!).

Personally I just hate flame wars, they selldom lead to anything
really productive, they are mostly unproductive (they may however, but
rarely, have interesting and good side effects, but these could
happend in other ways).

BTW. The small temperature change that you reported, wasn't that due
to the small change of temperature of the cathode and thuse the energy
of the emitted electrones? I am probably way of, but do tell me.

 EaSED> Old tube organs had probles with this, AT FIRST. After WWII, they
 EaSED> knew how to make stable LC resonators, which was the REAL stability
 EaSED> issue. Crude iron-core inductors were widely used to set oscillator
 EaSED> pitch--the development of special alloys (and later, ferrites)
 EaSED> helped enormously. This is why the first versions of the Hammond
 EaSED> Solovox were such a pain to keep in tune, while the final Type L
 EaSED> version of 1949 was much more stable. (even so, Hammond "experts"
 EaSED> continue to curse all Solovoxes as unstable. See the Hammond/Leslie
 EaSED> FAQ site for a typical comment.)

The Germans had to learn LC curcuits pretty well when the allied
freezed the import of natural crystal from Brazil. They put some
effort into it and there is many (good) German texts from this time.

It is obvious that lack of access to a certain technology can boost
the knowledge in another field... it is however much more interesting
to combine the knowledges and see what you can do with the various
mixtures.

Cheers,
Magnus