If you operate SSB, you might want to run higher voltage at the K3 terminals (e.g. at 14.5V which is below the 15.0V spec) to minimize IMD. This was discussed extensively in 2009 but the following by W4TV is a good summary:
################################ > Is there something critical in the radio that > gives this outcome? Critical adjustment perhaps? > Is it very sensitive what PS we use (ala W4ZV)? Yes, it is very sensitive to power supply voltage. Look at any of the application notes - the one Craig mentions for the P-P RD100HHF FETs is a good example. Decreasing Vcc (or Vdd) by just one Volt will increase the IMD at 100 Watts by 10 dB and decrease the maximum output power by almost 20 Watts. Running the power supply at 14.0 - 14.5 Volts and using a power supply with good dynamic regulation will go a long way to keeping the K3 "clean." ################################# -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Voltage-on-TX-tp7609564p7609609.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
