Site hosted by Build your free website today!

'200W raw' power amplifier

An AC-coupled 'raw' workhorse design intended for disco use.

The input, drive, bias and thermal feedback arrangements differ notably from the norm. The output following a familiar and rugged pattern (output devices 125W, 100V, 40A, 200kHz, 25hFE), this form of design's dependence (and that of the suggested power supplies, below) on expensive, difficult to obtain, large value, high-voltage electrolytic capacitors led to it's falling out of favour. Apart from restricting the low frequency performance, multiplying these components increased expense and compromised reliability.

With a >396VA transformer (66Vac @ 6A) and line rises the supply voltages could exceed the output device's Vce (~10%).

Contact me at
especially if you want additional content to this page
or if you find any links that don't work. Don't forget
to add the page title or URL. Take care!

Back to index, sound, tips or home.