First of all, I'd like to say...I don't speak for anybody except myself. Secondly, I'm not passing judgement on anyone else either,
especially since I have zero experience in a topic such as this. Me? Teach electricity? Don't be rediculous. I can't even spell.
I'm simply...grieviously...wrong at times, and so therefore the more I learn, the smaller this chance becomes.
http://openbookproject.net/electricCircuits/AC/index.html
I always was amused, and how resistance invariably changes with frequency...
http://members.aol.com/sbench102/plateres.html
It's just enough of a "mass defect" in something, to make nukes controllable. Just a thought.
Anyway. Those data tables aren't my job. I just *use* them. Guess I'm not interested in 'real' engineering, I guess.
http://www.turretboards.com/guitar_amplifier_builders_techs.htm
needed: An electronic meter capable of reading 0-20Vdc and with an ohmmeter scale.
*also*
non-dead battery
DMM or (Digital Multi-Meter) for stompboxes...ensure calibration with a lab spec bench unit
Then begin to think about Analog vacuum tube voltmeters...only then.
Why?
Because you need a high input impedance on the probe. This allows for a negligible effect when measuring capacitance leakage on the "coupling capacitors" primarily...then bypass, bias, filters...and so forth.
Why?
Because the fact remains, a circuit is by design in electronics, a thing of engineering feat. However, the bottom line is most "true" engineering of application, involves the (already) known factoras of design parameters, e.g. components. the circuits themselves, or rather any engineering project let's assume...
They tend to, in my opinion, primarily associate themselves with someone else's work. It's your job, in other words...to back off the math...and simply look to other needs of the equation, such...as, oh...I don't know...iteration of something you just pick off a chart, like it's the best case scenario educated guess. Number crunch to find your actual spec from a law of weighted averages, and voila. there's your design data within parameter.
But what I don't get...is how to simply look at it from the vantage point, when does an amp's topology "age like wine"?
It doesn't.
It gets worse, like rust on a car, or rotten timber in a home.
The choice then becomes...pull the positive end of an electrolytic (mono-directional) so-called coupling capacitor between stages, then...if it's not too difficult to unsolder because of PCB...then test them individually...or just replace all of them "over" design life anyway. If the analog meter can be accurate enough to see the leakage...then with formulae...you should be able to *see* the leakage too. In other words, the accuracy of the vacuum tube meter...the 'analog' meter is good enough for capacitors. If you use a hold function, I'm wondering on the DMM...but a sensitive tipped probe with built in 'sensitive' resistors...technically won't blow up for circuits rated at line to line voltage (1.6 x "voltage to ground"), but I digress...the rating of the meter in other words...as long as it doesn't exceed it...which is the case for amps which are under 1200 volts...
The point is, you can ruin the probe. It won't explode, like a DMM instantaneously going into a plasma state...but in hindsight, if you can see a "leakage" in coupling capacitors, then why not? Buy one.
So you remember, that electricity flows negative to positive in the cinsistent world of electronics, and you de-solder...power up...watch, take notes...replace...form filtering can capacitors, eventually...practice your soldering skilss, and pretty soon, you got a refurbished tube head. Or not.
It depends, because it usually takes a tube tester, signal generator, and yet an o-scope to detect intermodulation distortion, so simply building a load box, buying radiacs, and whatnot...including capacitance discharge sticks...these things can be worth it, or not. It just depends if you have a plan, and a good recipe for the "blue-printed" motor. These things almost always, need records to examine trends...but you want to do it efficiently, speedily, and of course, purposefully.
http://www.diystompboxes.com/pedals/tubedummy.html
http://www.trainwreck.com/
http://www.angela.com/catalog/how-to/tw.html
I'm simply...grieviously...wrong at times, and so therefore the more I learn, the smaller this chance becomes.
http://openbookproject.net/electricCircuits/AC/index.html
I always was amused, and how resistance invariably changes with frequency...
http://members.aol.com/sbench102/plateres.html
It's just enough of a "mass defect" in something, to make nukes controllable. Just a thought.
Anyway. Those data tables aren't my job. I just *use* them. Guess I'm not interested in 'real' engineering, I guess.
http://www.turretboards.com/guitar_amplifier_builders_techs.htm
needed: An electronic meter capable of reading 0-20Vdc and with an ohmmeter scale.
*also*
non-dead battery
DMM or (Digital Multi-Meter) for stompboxes...ensure calibration with a lab spec bench unit
Then begin to think about Analog vacuum tube voltmeters...only then.
Why?
Because you need a high input impedance on the probe. This allows for a negligible effect when measuring capacitance leakage on the "coupling capacitors" primarily...then bypass, bias, filters...and so forth.
Why?
Because the fact remains, a circuit is by design in electronics, a thing of engineering feat. However, the bottom line is most "true" engineering of application, involves the (already) known factoras of design parameters, e.g. components. the circuits themselves, or rather any engineering project let's assume...
They tend to, in my opinion, primarily associate themselves with someone else's work. It's your job, in other words...to back off the math...and simply look to other needs of the equation, such...as, oh...I don't know...iteration of something you just pick off a chart, like it's the best case scenario educated guess. Number crunch to find your actual spec from a law of weighted averages, and voila. there's your design data within parameter.
But what I don't get...is how to simply look at it from the vantage point, when does an amp's topology "age like wine"?
It doesn't.
It gets worse, like rust on a car, or rotten timber in a home.
The choice then becomes...pull the positive end of an electrolytic (mono-directional) so-called coupling capacitor between stages, then...if it's not too difficult to unsolder because of PCB...then test them individually...or just replace all of them "over" design life anyway. If the analog meter can be accurate enough to see the leakage...then with formulae...you should be able to *see* the leakage too. In other words, the accuracy of the vacuum tube meter...the 'analog' meter is good enough for capacitors. If you use a hold function, I'm wondering on the DMM...but a sensitive tipped probe with built in 'sensitive' resistors...technically won't blow up for circuits rated at line to line voltage (1.6 x "voltage to ground"), but I digress...the rating of the meter in other words...as long as it doesn't exceed it...which is the case for amps which are under 1200 volts...
The point is, you can ruin the probe. It won't explode, like a DMM instantaneously going into a plasma state...but in hindsight, if you can see a "leakage" in coupling capacitors, then why not? Buy one.
So you remember, that electricity flows negative to positive in the cinsistent world of electronics, and you de-solder...power up...watch, take notes...replace...form filtering can capacitors, eventually...practice your soldering skilss, and pretty soon, you got a refurbished tube head. Or not.
It depends, because it usually takes a tube tester, signal generator, and yet an o-scope to detect intermodulation distortion, so simply building a load box, buying radiacs, and whatnot...including capacitance discharge sticks...these things can be worth it, or not. It just depends if you have a plan, and a good recipe for the "blue-printed" motor. These things almost always, need records to examine trends...but you want to do it efficiently, speedily, and of course, purposefully.
http://www.diystompboxes.com/pedals/tubedummy.html
http://www.trainwreck.com/
http://www.angela.com/catalog/how-to/tw.html
