On Fri, 13 Jan 2012 12:26:47 -0800 Phil Hystad <[email protected]> writes: > bob, > > I am not sure if you understand my previous problems I was > reporting. The hum has nothing to do with the mic plugged into the > K3 or not (obvious if the mic is not plugged in, there is no > problems). But, the hum comes with PTT transmit and not merely > because the mic is plugged in. > > But, for some unusual reason, the hum is no longer there. But I > fear it is waiting out there, maybe in the greenbelt behind our > house, to make a sneak attack when I least expect it. >
Those evil north Koreans Har GL on your fixing the problem,,, been there done that Bob K3DJC 73, phil > > > On Jan 13, 2012, at 12:09 PM, [email protected] wrote: > > > so you unplug the mike input to K3 the hum goes away > > when you plug into the K3 mike input the hum is there ? > > I would think you have a bad mike/cord/connecter > > > > Bob K3DJC > > > > On Fri, 13 Jan 2012 11:31:38 -0800 Phil Hystad <[email protected]> > writes: > >> 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:[email protected] > >> > >> This list hosted by: http://www.qsl.net > >> Please help support this email list: > http://www.qsl.net/donate.html > >> > >> > > > > ____________________________________________________________ > > Get Free Email with Video Mail & Video Chat! > > http://www.juno.com/freeemail?refcd=JUTAGOUT1FREM0210 > > ______________________________________________________________ > > 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 > > > ____________________________________________________________ Groupon™ Official Site 1 ridiculously huge coupon a day. 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