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Re: Class A, AB1, B, C Operation/Modes [message #97852 is a reply to message #97384]

Mon, 08 July 2024 20:22

positron
Messages: 113
Registered: May 2020

Viscount

>> I missed another point that breakneck made that needs correcting.
My apology to everyone for being late.

"Operating class is also independent of output stage topology, whether
single ended or push pull",

>> A single ended amplifier (SETriode/tetrode or SEPentode) cannot
be operated class B in Audio with any fidelity. Think super super
high distortion.

>> If one attempted Class AB in audio applications, one is simply
increasing Harmonic Distortion (HD), Intermodulation Distortion (IMD)
along with lower output power. But who would want such unless for
higher or unique distortions from instruments and/or voices etc.

>> On the other hand, Push Pull (PP) can be operated as Class A, AB1,
AB2, Class B.

>> In Class A, each output tube operates over the entire 360 degrees
of the signal waveform. Less power output, least efficient, low
distortion.

>>Class AB1, AB2, each tube, X and Y are cutoff over a portion of the
musical signal waveform. However, Y tube conducts over the portion of
the musical signal that X tube is cutoff, and X tube is conducting
when Y tube is cutoff over a portion of the musical signal. Low
distortion.

>>The overlap of conduction in PP makes for a seemless transition and
much more constant damping factor (DF) etc vs an SET/SEP amp.

>> (AB2 designation means a musical signal large enough for control
grid current flow. AB1 designation, No grid current flow over any
portion of the musical signal.)

>> In Class B operation, crossover, notch distortion is usually prevalent,
and both H and IM Distortions are higher; but is the most efficient. This
is good for megaphones, RF use etc where efficiency is important.

In conclusion, knowledge is power to make wise choices.

Again my apology for not addressing the comment in a timely manner.

pos

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[Message index]

		Class A, AB1, B, C Operation/Modes By: positron on Sun, 05 February 2023 20:40
		Re: Class A, AB1, B, C Operation/Modes By: Wayne Parham on Sun, 05 February 2023 20:54
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Mon, 06 February 2023 20:38
		Re: Class A, AB1, B, C Operation/Modes By: positron on Tue, 07 February 2023 16:13
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Tue, 07 February 2023 19:33
		Re: Class A, AB1, B, C Operation/Modes By: positron on Tue, 07 February 2023 20:37
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Thu, 09 February 2023 21:01
		Re: Class A, AB1, B, C Operation/Modes By: positron on Thu, 09 February 2023 21:35
		Re: Class A, AB1, B, C Operation/Modes By: positron on Tue, 28 February 2023 19:04
		Re: Class A, AB1, B, C Operation/Modes By: Wayne Parham on Wed, 01 March 2023 08:28
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Wed, 01 March 2023 19:45
		Re: Class A, AB1, B, C Operation/Modes By: positron on Sun, 05 March 2023 00:33
		Re: Class A, AB1, B, C Operation/Modes By: Wayne Parham on Sun, 05 March 2023 08:05
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Sun, 05 March 2023 08:10
		Re: Class A, AB1, B, C Operation/Modes By: positron on Mon, 06 March 2023 19:01
		Re: Class A, AB1, B, C Operation/Modes By: positron on Sat, 06 May 2023 22:32
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Tue, 09 May 2023 21:30
		Re: Class A, AB1, B, C Operation/Modes By: positron on Thu, 11 May 2023 00:26
		Re: Class A, AB1, B, C Operation/Modes By: positron on Tue, 05 September 2023 23:48
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Fri, 08 September 2023 21:12
		Re: Class A, AB1, B, C Operation/Modes By: BreakneckRedneck on Sun, 24 September 2023 00:42
		Re: Class A, AB1, B, C Operation/Modes By: positron on Thu, 12 October 2023 11:21
		Re: Class A, AB1, B, C Operation/Modes By: positron on Fri, 03 November 2023 12:22
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Fri, 03 November 2023 20:58
		Re: Class A, AB1, B, C Operation/Modes By: positron on Sun, 05 November 2023 01:38
		Re: Class A, AB1, B, C Operation/Modes By: positron on Thu, 07 December 2023 23:12
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Mon, 18 December 2023 20:20
		Re: Class A, AB1, B, C Operation/Modes By: positron on Tue, 16 January 2024 21:32
		Re: Class A, AB1, B, C Operation/Modes By: gofar99 on Wed, 24 January 2024 20:31
		Re: Class A, AB1, B, C Operation/Modes By: positron on Mon, 08 July 2024 20:22

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