On Mon,12/28/2015 10:08 AM, Barry N1EU wrote:
I believe this also means that the K3 headphone output circuit will deliver 10X power (with fixed V, P~1/R) into a 30-ohm headphone as a 300-ohm headphone, so at some point the amp might clip as you raise the headphone impedance?
Only if you crank the headphone output too high. My 1V example is simply the maximum sine wave output at clip, and that value is typical. When you turn down the headphone gain, you reduce that voltage. I don't recall the spec for the K3. In your 30 ohm headphone example, you would probably not need to crank the gain nearly as high, so the output voltage would stay below clip. The exception might be if the operator has significant hearing loss, so was driving the headphones very hard.
73, Jim K9YC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
