At 10:49 AM 4/26/2010, Paul Plack wrote:
Your heatsink approach, however, is exactly what I was talking about. I have several very large heatsinks originally designed for use with big SCR switching circuits which look to be more than generous for a 30w PA at 100% duty cycle.
<----Remember folks that heatsink capability is not the only issue when it comes to duty cycle. Components such as caps, resistors, diodes and even pc board traces all factor in as well and, even though you might be able to suck the heat away from the transistors adequately, other parts aren't necessarily up to the task and could very well fail.
Ken ------------------------------------------------------------------------------ President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net "We don't just make 'em. We use 'em!"
