2024-06-13 19:21:56 +00:00
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## About
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Some people have made the mistake of expressing interest in electron
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tubes. They're about to learn more than they bargained for.
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## News
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The first session was a great success. We covered the first item in the
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syllabus and part of the second.
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The next session will feature a brief review of the first session and
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finish covering the second section. I think it should be possible to
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reach the section on advanced circuits. during the next session.
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I also owe you guys a tube dissection, I'll try to work that into the
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next session too.
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## Schedule
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Next class: Aug 11 at 7:30 PM.
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## Silly Bus
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- Thermionic emission: From the lightbulb to the pentode.
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- Fundamental circuits and coupling
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- Push-pull and Phase splitting circuits
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- Transformers in single-ended and push-pull.
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- Advanced circuits
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- Tube failure modes
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<!-- -->
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- Hands-on experience building a battery-powered single tube filamentary
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pentode pre-amp.
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<!-- -->
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- Power supplies and tweaking.
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<!-- -->
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- What is the real secret to great sound?
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### Laboratory Supplies
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[cheap demo
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pre-amp](http://www.bottlehead.com/store.php?crn=220&rn=438&action=show_detail)
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Go to \[tubedata.info\] and obtain what you think is the most
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informative datasheet for the following tubes and print out a copy. --
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you need a physical copy.
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**filamentary diode** 5U4\* Optional: GZ34 / 5AR4
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**canonical triode** 2A3 Optional: 845
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**to explore gain versus output** 6SN7\* 6SL7\* or 12AX7 / ECC83
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**Pentodes** 6BQ5 / EL84 Optional: KT88, EF86
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3S4 \<\<\< absolutely required, this is the tube we're using.
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### Suggested Reading
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Radiotron Designer's Handbook 4th ed. \[www.pmillett.com\] Might have
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one lying around.
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Tube Circuits for Audio Amplifiers (1-882580-03-6) features some very
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elegant and practical designs.
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An Approach To Audio Frequency Amplifier Design. (1-882580-05-2) Has
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some good discussions about output transformers and ultralinear design.
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Then it starts out with some nice practical amps but, before long at
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all, starts talking about 1,100 watt monsters with 2.5KV power supplies.
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Building Valve Amplifiers (0-7506-5695-6) is probably too practical to
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be enjoyable but I have to deem it essential. His other book is
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fantastic, one of the most well worn tomes in my personal library, but
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get this one first.
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2024-06-13 01:48:44 +00:00
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[Category:Classes](Category:Classes "wikilink")
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