On Sat, 19 Jul 2008 15:07:24 -0500, "Ed Picha" <[EMAIL PROTECTED]> wrote:
>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 > [snip] I don't see that anomaly with my K3 and my Heil ProSet Plus. I keep the speakers and headphones both on all the time. Tom, N5GE - SWOT 3537 - Grid EM12jq "Those who would give up Essential Liberty to purchase a little Temporary Safety deserve neither Liberty nor Safety" An excerpt from a letter written in 1755 from the Assembly to the Governor of Pennsylvania. Support the entire Constitution, not just the parts you like. http://www.n5ge.com http://www.eQSL.cc/Member.cfm?N5GE _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
