It depends on how you made the amplifier. I produce some models of amplifiers, of different powers, all in switching operation. Here an image of the DK7FC grabber, you can see at 472.1 KHz the spectrogram of a German station that use a class D amplifier, at 472.5 an Italian station that use a 400W tube linear amplifier and at 473.3 there is my signal with my QRO+ switching PA.
https://www.dropbox.com/s/oziocm3vshfftgl/19012015.JPG?dl=0 I can assure that I often find local stations operating at 250-300 Hz from my frequency that are not minimally disturbed I do not think that a linear amplifier is so better. I also made a 100W output amplifier specifically designed for the K3. This amplifier runs at 12 volt. All my PA need an input signal (adjustable) from -10dBm to + 20 dBm https://www.dropbox.com/s/u2yjp0ltv0kbsy5/K3%20and%20Pa.jpg?dl=0 73, Fausto IK4NMF ______________________________________________________________ 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]
