In , wrote:


Snipped because your response is just to ridiculous to
even bother reading. In a nutshell your dribble implies that:

A one farad cap used on a large amp (dx1600) used on
SSB will make a difference.. It can't make any noticeable
difference at all.

A one farad cap by definition can only supply one amp
for one second at a one volt potential. It can not make any real
difference on a setup that requires 150 amps on voice peaks.

The current draw on voice peaks last long enough to deplete
the benefits a one farad cap instantaneously. If the cap is depleted
instantaneously then a standard SSB voice keyup would instantaneously
absorb all of the caps ability to hold a voltage and make a noticeable
difference in a voice communication.

Alright, we'll start with what you -do- understand. 1 farad = a charge
equivalent to 1 amp across 1 volt for 1 second. That means it can supply 2 amps
across 1 volt for 1/2 second, right? Or 4 amps across 1/4 volt for 1 second.
With me so far?

Now, is the cap going to be supplying the full 12.6 volts? No. It only has to
make up the voltage that was dropped by the inadequate impedance of the power
supply, which in this case is 1.3 volts.

Does the cap need to supply the full 79.4 amps? No. Again, it only needs to make
up the current that the power supply can't provide on a peak. The DC input
impedance of the amp is 0.16 ohms, so with a voltage drop of 1.3 volts the
current required by the caps is going to be 8.2 amps.

Does the cap need to continuously supply 8.2 amps @ 1.3 volts? No. Remember,
that is the -peak- draw by the amp, and occurs only for a fraction of the cycle.
What happens during the rest of the cycle? The capacitor charges back up! So how
long is the cycle? For audio amps the slowest cycle is 20 Hz, or 0.05 seconds.
And since we are only working the amp one half-cycle at a time, that reduces it
even further to 0.025 seconds. Under half of a 20 Hz audio cycle, the time the
amp is under peak load is typically going to be less than 1%. But even if the
amp spends an unbelievable 10% of the time under peak load, that's 10% of 0.025
seconds, or 0.0025 seconds.

Now we know that our cap needs to supply 1.3 volts @ 8.2 amps for 0.0025
seconds.

1.3 * 8.2 * 0.0025 = 0.0267 farads

IOW, not only does the cap make a difference, but a 1 farad cap is roughly 40
times bigger than required!

As I stated before, the difference lies in the ESR, only part of which is the
actual number of farads. A capacitor's internal resistance and dielectric
properties can make even a huge capacitor useless for certain applications.

The problem is not in the theory but in the relative usefulness of
one farad for a 1500 watt amp. One farad is not big enough.

Go back to school, Tnom.





=============

"...but I admitted I was wrong, Like a man! Something you and QRM
have a problem with. You guys are wrong and you both know it and
are both too small to admit it."
---- Twistedhed ----

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