Phil, which firmware version are you using? I was using the beta 4.47 and I developed audio problems the other night, After I deleted 4.47 and went back to the latest production firmware all was fine. Sorry if this has already been discussed - I just read this thread.
73 Bill NZ0T On Fri, Jan 13, 2012 at 1:32 PM, Phil Hystad-3 [via Elecraft] < [email protected]> wrote: > Ron, > > Well, I just had a quick SSB chat with Clyde (AA7WC) (pre Noon Time net on > 40 meters) and asked specifically for audio report with possible hum. His > report was no hum, clear good sounding audio, with S7 signal. > > So I am suspicious of my florescent lights in the garage although they are > on right now with no hum. I am thinking though that maybe there is > something intermittent with those lights. But, then again, the "something > loose in the mic cord" maybe be the cause too. But, I jiggled that cord > and connection and so on quite vigorously before when I had the hum and it > did not change the hum status. Then, when the hum disappeared, I did those > jiggle the cord and connector on the mic tests again and the hum DID NOT > come back. > > Wow, I can't believe I have spent the entire morning fooling around with > this. I even called into work and said that I was not coming in today just > to work on this problem. I don't really want to go outside anyway despite > that the temperature has now risen to a toasty 36 degrees. > > 73, phil, K7PEH > > > On Jan 13, 2012, at 11:23 AM, Ron D'Eau Claire wrote: > > > Good luck Phil. That last part really suggests something loose in the > mike > > cord as I suggested at first. > > > > Ron AC7AC > > > > -----Original Message----- > > Ron, > > > > OK, now it appears I was mistaken when I said that that the hum was in > both > > mics. I think I flubbed something up in my previous test due to the way > > that the macros are assigned to keys which led me to thinking that the > hum > > occurred in both mics. But, I learned something in this... > > > > One, don't try to use one of your macro assigned keys (in my case M2 and > M1) > > while in the menu because that merely reassigns the key to the new menu > > entry. I made this mistake several times this morning. But, when I > > discovered it and then reset my macro definitions, I rediscovered that > the > > HUM occurs in the front panel MH2 hand held mic only. I did this test > > several times to make sure I was not confusing things. > > > > I discovered something else that I did not know before. PTT is actuated > by > > any of the methods of PTT. So, when I thought I had the headphones > CM500 > > mic enabled I used my foot switch for push to talk and since that worked > for > > some dumb reason I was thinking I had successfully switched from front > panel > > to rear panel. But, I had not. I also discovered that I could use the > hand > > mic (front panel) PTT switch even though my rear panel mic was being > used. > > Now, after I discovered this, I realize that it is obvious but something > > that lead to my confusion. > > > > So, the problem occurs on the FRONT PANEL mic only and not the rear > panel. > > And, the problem occurs when the K3 is in TOTAL isolation from all AC > > sources except for possibly me. I mean, I am holding the mic but then I > > don't think that is a cause of the hum because I tried it with a > insulated > > hand and it still caused the hum on the front panel mic. > > > > I doubt that this is caused by wall-outlet type AC because I have erased > all > > AC for some of my tests. And, besides, this problem seemed to occur > .... > > > > OK, while writing that last sentence something occurred to me. Another > > change I had made on Wednesday after I had my good audio reports on the > MH2 > > front panel mic was that I set the configuration for the band specific > power > > levels to work with the KPA500. So, I just now went to test the mic and > > change that setting around but the hum is gone. > > > > I repeat, the hum is gone from the front panel mic. I now can't test > the > > band specific power menu setting because I have no problem. > > > > But, I have a suspicion as to the cause now and I am going to do some > other > > experiments. > > > > 73, phil > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden > email]<http://user/SendEmail.jtp?type=node&node=7185299&i=0> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > ------------------------------ > If you reply to this email, your message will be added to the discussion > below: > http://elecraft.365791.n2.nabble.com/K3-Hum-on-Audio-tp7182701p7185299.html > To start a new topic under Elecraft, email > [email protected] > To unsubscribe from Elecraft, click > here<http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=unsubscribe_by_code&node=365791&code=bnowdGhhbUBnbWFpbC5jb218MzY1NzkxfDE0MzcxNDc4Nzk=> > . > NAML<http://elecraft.365791.n2.nabble.com/template/NamlServlet.jtp?macro=macro_viewer&id=instant_html%21nabble%3Aemail.naml&base=nabble.naml.namespaces.BasicNamespace-nabble.view.web.template.NabbleNamespace-nabble.view.web.template.InstantMailNamespace&breadcrumbs=instant+emails%21nabble%3Aemail.naml-instant_emails%21nabble%3Aemail.naml-send_instant_email%21nabble%3Aemail.naml> > -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Hum-on-Audio-tp7182701p7185563.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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
