Fathom
when I was young, it was Mark Twain, now little less
when I was young, it was Mark Twain, now little less
@Dennis Hui correct, specifically my F5 I'm playing with.. 32v rails and ~22db gain.
I'd like to understand how these changes pan out right across the board with Class A being a primary focus
I've 4 & 8Ω 100w wire wound loads, earth ref scope, arb gen, DMM & of course IR temp gauge so a bit of arsenal
many thanks
I'd like to understand how these changes pan out right across the board with Class A being a primary focus
I've 4 & 8Ω 100w wire wound loads, earth ref scope, arb gen, DMM & of course IR temp gauge so a bit of arsenal
many thanks
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don't obsess
there are myriad more important things/factors/tricks in amp's construction/characteristics worthy of obsession
anyway - invest some brain/elbow grease to learn some LTSpice; that will give you all answers on basic dilemmas, perfect base to build pool of questions
you'll decrease TV/ball watching time, and increase gray mass temperature
what's not to like?
Dont watch TV these days, to much like a glorified police report and full of wanna B plastic injected fish like lipped nutcases, not to mention movie stars that are way smarter than me, huh.
Ok will look into LTspice, but how do I measure clunk point as apposed to simulating it please?
Ok will look into LTspice, but how do I measure clunk point as apposed to simulating it please?
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take as example any of my recent small amps , but say that Babelfish XA252 is most clearly drawn
you'll see that amp is having inserted 0R1 resistor in each rail**
scenario is simple - you put probes of your measuring instrument across said 0R1; as long amp is in A Class, Iq (thus observed voltage sag) is greater than current variation governed by signal
in a moment when KlunK! is happening, current variation is greater than Iq, thus output part on observed side is not conducting for short moments (when signal is in xover region)
so, you can see with your instrument that in these moments voltage sag across 0R1 is none/zilch/zero
though, said "instrument" must be fast enough with side pointed to your eyes, so you must use scope
N.B. scope probe must be floating; so either use differential probes or cut your scope from safety GND and feed it through isolation xformer
we want you both [learning and prospering] and alive
**that insert, as measurement tool, possible with pretty much any amp
you'll see that amp is having inserted 0R1 resistor in each rail**
scenario is simple - you put probes of your measuring instrument across said 0R1; as long amp is in A Class, Iq (thus observed voltage sag) is greater than current variation governed by signal
in a moment when KlunK! is happening, current variation is greater than Iq, thus output part on observed side is not conducting for short moments (when signal is in xover region)
so, you can see with your instrument that in these moments voltage sag across 0R1 is none/zilch/zero
though, said "instrument" must be fast enough with side pointed to your eyes, so you must use scope
N.B. scope probe must be floating; so either use differential probes or cut your scope from safety GND and feed it through isolation xformer
we want you both [learning and prospering] and alive
**that insert, as measurement tool, possible with pretty much any amp
Thanks ZM, cool, I get to fire up my scope ..TV
Good you touched on earth reference too. Thinking of buying a computer UPS as the isolation.
Good you touched on earth reference too. Thinking of buying a computer UPS as the isolation.
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