When I connect my Hal DXP38 AF Out to the K3 Line In, I get a maximum of 20 watts RF output, even when the TX Level pot on the DXP38 is set for maximum output, MIC SEL is set to Line In, PWR is set to 100 watts, and Line is set to 60 (max setting available). I see no ALC bars.
When I connect the DXP38 AF Out to the rear mic jack, I get 100 watts RF output and 6 ALC bars with MIC SEL set for rP.L, PWR set for 100 watts, and the mic gain set to 15. Apparently the K3 Line In is designed to support sound card digital inputs, so if you're using an external box for AFSK RTTY, you may have to use the rear mic input to get full RF power output. I didn't try the front mic input, but presumably it would be the same as the rear mic input. I reported the low power problem using Line In for RTTY to Wayne a couple of weeks ago, but I didn't get a response. I'm curious about why there is such a difference between the maximum achievable RF output on RTTY when using the line input (max line gain of 60 for 20 watts RF and no ALC indication) vs. the rear mic input (mic gain at 15 for 100 watts RF and 6 bars of ALC). The output level from the DXP38 is the same to both ports, so obviously, the K3 Line In has a much lower maximum level than the Mic In. Is this something that can be addressed in a software upgrade? Nelson, KU0A _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
