500W PA amplifier with Limiter

[nazirdigi]

Originally Posted by AndrewT

Hi.
with the knob towards the operator and the 3 connections pointing down, you have a pot that gets quieter as you turn the knob clockwise.
Most listeners prefer clockwise for louder. This requires you to swap common (Sig Gnd with Input)

You can "see" this mechanically.
Turn the knob fully anticlockwise. The wiper will now be positioned at the stop next to Input. Wiper taps off maximum signal level (=loud).
Turn the pot fully clockwise till the wiper hits the Common stop. The wiper now taps off a near ground signal level (=quiet)

is this correct?

[AndrewT]

I speak a different language. Someone else help !

[apexaudio]

Volume pot

[nazirdigi]

for the maximum power which transistor is good-mjl4281 ,mjw3281 ,2sc5200.

[engel dela pena]

Originally Posted by apexaudio

Volume pot

apex,
how to use volume pots in a balanced input amp(like b500 in grouond A+B )

[apexaudio]

Originally Posted by engel dela pena

apex,
how to use volume pots in a balanced input amp(like b500 in grouond A+B )

A, B pins are for bridge no for balanced input, go to post #54.

[engel dela pena]

Originally Posted by apexaudio

A, B pins are for bridge no for balanced input, go to post #54.

sir,
not this bridge,
but i mean balance input using one channel only grnd,a,b

[apexaudio]

Originally Posted by engel dela pena

sir,
not this bridge,
but i mean balance input using one channel only grnd,a,b

A and B pins can not be use as balanced input without change schematic.

[apexaudio]

B500 with balanced input, volume pot and bias adjust.

[engel dela pena]

thanks apex,
the zy15 and zf15=is it ok to use for this two value boyh 1watt?
the 25v 2.2uf,47uf,electrolytic=is it ok to use higher v with same uf?