Hi folks: I've read with interest the recent discussions about headphone level on the K3, and specifically problems with Heil headsets. I have found that the level in my ProSet is fine for my purposes using either the AF GAIN HI or LO in the K3 configuration menu.
Our FD group used a K3 and Heil ProSet this year, and we were really hoping to configure the K3 to have the speaker and headphones both active. When we tried to use the SPKR+PH configuration, we found that the speaker and headphone levels were mismatched such that when the AF gain was adjusted to get adequate headphone level, the speaker was excessively loud, to the point where the loud speaker audio was annoying to the operator wearing the headphones. A quick review of the schematic for the K3 leads me to believe that the headphone level is programmable. By programmable, I don't mean in the sense that it can be configured from the existing user configuration menus, but programmable in the sense that the headphone driver ( U2, an LM4811MM, see K3 DSP IF: DAC AUDIO, page 3 of 9) can have its gain controlled by an up/down pulse provided by U17, the EPM240. What do folks think about a possible future enhancement to make headphone audio level user-programmable? It would address issues with different headphone brands where users can't seem to get enough headphone audio, and it would allow independent headphone and speaker levels to address the issue that I described. 73, ed N9EP _______________________________________________ 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
