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Old Pages/Electronics/Electron_Tube_Class.md

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+## About
+
+Some people have made the mistake of expressing interest in electron
+tubes. They're about to learn more than they bargained for.
+
+## News
+
+The first session was a great success. We covered the first item in the
+syllabus and part of the second.
+
+The next session will feature a brief review of the first session and
+finish covering the second section. I think it should be possible to
+reach the section on advanced circuits. during the next session.
+
+I also owe you guys a tube dissection, I'll try to work that into the
+next session too.
+
+## Schedule
+
+Next class: Aug 11 at 7:30 PM.
+
+## Silly Bus
+
+- Thermionic emission: From the lightbulb to the pentode.
+- Fundamental circuits and coupling
+- Push-pull and Phase splitting circuits
+- Transformers in single-ended and push-pull.
+- Advanced circuits
+- Tube failure modes
+
+<!-- -->
+
+- Hands-on experience building a battery-powered single tube filamentary
+  pentode pre-amp.
+
+<!-- -->
+
+- Power supplies and tweaking.
+
+<!-- -->
+
+- What is the real secret to great sound?
+
+### Laboratory Supplies
+
+[cheap demo
+pre-amp](http://www.bottlehead.com/store.php?crn=220&rn=438&action=show_detail)
+
+Go to \[tubedata.info\] and obtain what you think is the most
+informative datasheet for the following tubes and print out a copy. --
+you need a physical copy.
+
+**filamentary diode** 5U4\* Optional: GZ34 / 5AR4
+
+**canonical triode** 2A3 Optional: 845
+
+**to explore gain versus output** 6SN7\* 6SL7\* or 12AX7 / ECC83
+
+**Pentodes** 6BQ5 / EL84 Optional: KT88, EF86
+
+3S4 \<\<\< absolutely required, this is the tube we're using.
+
+### Suggested Reading
+
+Radiotron Designer's Handbook 4th ed. \[www.pmillett.com\] Might have
+one lying around.
+
+Tube Circuits for Audio Amplifiers (1-882580-03-6) features some very
+elegant and practical designs.
+
+An Approach To Audio Frequency Amplifier Design. (1-882580-05-2) Has
+some good discussions about output transformers and ultralinear design.
+Then it starts out with some nice practical amps but, before long at
+all, starts talking about 1,100 watt monsters with 2.5KV power supplies.
+
+Building Valve Amplifiers (0-7506-5695-6) is probably too practical to
+be enjoyable but I have to deem it essential. His other book is
+fantastic, one of the most well worn tomes in my personal library, but
+get this one first.
+
+[Category:Classes](Category:Classes "wikilink")