Re: Audio amp...Phase splitter...Why?

You guys are very helpful here. Thank you for your input.

I will be more thorough of circuit descriptions in the future. The
Marshall does have a 12xa7 in the so called phase splitter circuit
though in some schematics it is written as ECC83. I do not have enough
tube knowledge to know if that is the same thing or if one is a
specific tube name while the other is a general tube function name or
they are completely different triodes.

I do know that schematics do not always have the actual components
listed or circuit diagram as the device was released out the door.
Sometimes components change due to inventory the day it was assembled
as opposed to what it was supposed to have according to schematic or
BOM.

The term "Phase splitter circuit" in this amplifier is not a well
chosen name because it does lead a person, at least a new person in
electronics, to believe that the signal is 180 degrees out of phase.
This I was struggling with initially believing the signal was delayed.
You are taught this idea of lagging and leading Eli when learning about
phase and phase diagrams etc. In this Marshall the circuit is actually
producing a normal and an inverted signal so I see why using the phase
term at all is not a good idea. Perhaps it should simply be called
"Inverted signal splitter circuit" though the schematic does call it as
I said above.

Is this a difference of European vs American terminology perhaps?
Whatever the case may be this is another example of why I feel that so
much of Audio Electronics and Electrical Engineering seems so cryptic
almost as though to make it harder than it really is. The real issue
for me in that regard is I can't find any books on audio electronics
that explain this stuff independently of the rest of Electronics. All
of my text books completely miss Tubes and the only mention of audio is
in the form of a radio amplifier and receiver which gets one half page
out of 890.

Why has the electrical engineering curriculum so completely stopped
teaching audio? Last I looked everyone has a stereo, mp3 player, 5.1
audio card for the PC, a Home theater, TVs, and what about musicians,
guitar players, keyboardists, Disc Jockeys and rappers, singers, etc.
why am I not taught audio in all of these areas? I will ask my Dean.

If anyone out there has enough knowledge to write a book on audio you
may make some money on it. For me understanding the signal the
electrical/physical signal as it propagates through the audio amplifier
would be very helpful to me. Seeing the various voltage dividers and
tube electrodes in motion would give me something real I can picture in
my head. Math by itself just doesn't do anything for me.

Thanks for all of your help

.

Relevant Pages

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  • Re: All Tube For Once and For All
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  • Re: All Tube For Once and For All
    ... "all tube" amp does not use transisters in the amp circuit. ... According to anyone that has half a clue about electronics. ... If you have a few tubes in a circuit, and it is all tube at that point, ...
    (alt.guitar)