On Line Tube Learning for newbies....

[tenderland]

I am a tube nub , I find much basic info on tubes , basic electronics ....
not an isue ,what i can not seem to find is good information on the application and fundementals of feedback.


jeff

[SY]

Well, feedback theory is not really different between tubes and solid state. For a good overview, there's always the classic "Art of Electronics" by Horowitz and Hill.

Do a web search for Norman Crowhurst and you'll find his clear, readable, and lively papers and articles covering the practicalities of tube feedback circuits. And for a more modern approach, there's Morgan Jones's books.

[powertriode]

Here are a couple:-

http://www.funwithtubes.net/

And when you are slightly more advanced

http://members.aol.com/sbench101/

As for reading material (i.e. books), read everything that you can find by Norman Crowhurst.

I feel that "Fundamentals of Radio Valve Technique" by Deketh and "Principiles Of Electron Tubes" by Reich are a must read as they are meant for (slightly advanced) newbies.

[powertriode]

Valve (or Tube) theory basics.

http://www.livinginthepast.demon.co....ry/vtheory.htm

[serengetiplains]

Lynn Olson's website contains a good deal of helpful, clearly expressed information in fun to read format. Olson is a former audio reviewer who quit the reviewing field and, among other things, developed a line of push-pull transformer coupled DHT amplifiers. His design notes and historical perspectives are particularly educational.

His website is here.

Design notes and schematics for his all-transformer coupled amplifiers are here and here and here.

An index of audio and tube related articles can be found here.

Enjoy!

[heater]

I've just found this brilliant introduction to electronics. It has a good chapter on tubes. Quite hands on, not so much mathematics, but covers the basics very well.

http://www.du.edu/~etuttle/electron/elecindx.htm

[mr2a3]

Nice and useful thread!

My two cents are the link to one SE and one PP amplifier projects very well described by a fine guy:

http://www.lundahl.se/claus_b.html

http://www.lundahl.se/claus_b_se.html

Ciao!
Massimo

[Geek]

Online tube data sites - always useful

http://hereford.ampr.org/cgi-bin/tube
http://tdsl.duncanamps.com/tubesearch.php
http://frank.pocnet.net/
http://www.ginko.de/user/franz.hamberger/roehren/
http://208.190.133.201/tubes/tubes/index.htm
http://208.190.133.201/tubes/oldsyl/index.htm

[percy]

http://www.aikenamps.com/TechInfo_2.htm

[GRollins]

There was a post earlier for the glossary, but not for the main website:
www.tubecad.com
The level of difficulty varies from one writeup to the next, but everyone should at least browse what Broskie has to say. He drops hints and ideas at a phenomenal rate and he's not afraid to mix solid state and tubes if it will get him where he wants to go.
Note that most any basic electronics text published before the mid-seventies will have at least a few chapters on tubes. Get back as far as the fifties and the texts are solid tubes from front cover to back. The neat thing is that no one wants all these "obsolete" text books and you can frequently buy them for pocket change. I've even had people give them to me. My preference is for the McGraw Hill series, but there are others that are surely just as good.
There aren't that many new ideas out there, just people who rediscover old things and recycle them, generally with a new name.

Grey