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Old 24th Nov 2021, 12:30 pm   #12
Ambientnoise
Heptode
 
Join Date: Feb 2006
Location: Marlborough, Wiltshire, UK.
Posts: 809
Default Re: Wireless World April 1969 Amplifier Kit. 2N3055 Transistors.

Each output transistor needs to dissipate around 15 Watts, independent of signal level. You need really substantial heatsinking, just look at the ones Linley-Hood used as shown in the article. For a heatsink shared between two transistors, you need say 2 degrees C per watt or less.

Also, the amp is only 10 watts output so will not be “disco loud” especially with modern, relatively inefficient speakers.

I have used mine for many years, love them !
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