Application Note 948 - Linear Power Amplifier Using Complementary HEXFETs

Fascinating reading:
http://www.irf.com/technical-info/appnotes/an-948.pdf

(found from here: http://sound.westhost.com/articles/hexfet.htm)

I've heard that the 2SK1058 is superior for audio, and is the only
MOSFET spec'ed in Slone's book, but that this MOSFET is currently now
unobtanium.

What is the purpose of the inductor L1 (3 uH, air core) in series with
the speaker?

Any comments in general on the schematic, performance, ???

Michael
.

Relevant Pages

  • Re: Application Note 948 - Linear Power Amplifier Using Complementary HEXFETs
    ... I've heard that the 2SK1058 is superior for audio, ... MOSFET spec'ed in Slone's book, but that this MOSFET is currently now ...
    (sci.electronics.design)
  • Re: using mosfets as rectifiers?
    ... >>output of the audio transformer should be more than adequate. ... > It's powering the gate of a small signal mosfet. ... > There is a small parallel circuit on the gate to ...
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  • Re: using mosfets as rectifiers?
    ... >>output of the audio transformer should be more than adequate. ... > It's powering the gate of a small signal mosfet. ... > There is a small parallel circuit on the gate to ...
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  • Re: Is a MOSFET really a good current source???
    ... They go under various names, lin mos, l-mos and the ... The strong reason these are preferred for audio power amplifiers ... I've not measured their drain output impedance. ... They broke the MOSFET into two parts, ...
    (sci.electronics.design)
  • Re: using mosfets as rectifiers?
    ... >output of the audio transformer should be more than adequate. ... It's powering the gate of a small signal mosfet. ... The mosfet needs ...
    (sci.electronics.design)
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