[Elecraft] KX3+KXPA100 operation improved when running from a 12-V battery

[Wayne Burdick]

Thanks for the report, Ken.

At lower voltages, especially in voice modes, you should consider dialing back power output to preserve the amplifier's "headroom." For example, if the supply is dipping below 11 V, I back the power down to about 50 W, just to be safe. This is only a 3-dB drop in power but it'll be a little easier on the gear. For higher/lower voltages, adjust accordingly.

Of course the amp and radio will protect themselves if, due to reduced voltage, you exceed a threshold of current drain, temperature, or other parameters.

73,
Wayne
N6KR


On Jan 14, 2014, at 6:11 PM, Kenneth A Christiansen <w0cz at i29.net> wrote:

> I brought up my old deep discharge battery and am extremely please with the way it now works with the KX3 and the KXPA100. The KX3 was going down to 10.7 volts at 100 watts with about .9 volts of cable voltage loss. My digital meter was going down to 11.6 volts at the battery…