K3 and CW problem
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Dick
I appreciate your help in this matter but I discovered the problem. It is not the radio but my headphones. I have a pair of Kenwood HS-5 headphones and it seems they have a real dip in output below about 700Hz. I have the sidetone set at 650 Hz. When I tried a different set of headphones the problem went away. I never noticed that the speaker didn't do this either. I am kind of surprised that the HS-5 headphones have this noticeable dip in output at this range and I am surprised I never figured it out before this as I have been using these phones with my K2. But as I think about it this explains some things I noticed with my K2 but never figured out. I'll post to the list tomorrow as this might be interesting to others to know that some headphones output really drops at the lower frequencies. Larry Naumann N0SA I'm going to make a guess that the filter offset you've dialed in isn't negative. Would you connect your K3 to your PC, start the K3 Utility, navigate to the Configuration Tab, click "Edit Crystal Filters..." and verify that all the settings are correct? The frequency offset for a 5-pole crystal filter is usually negative. Do the offset values match those printed on your crystal filters? If you can, please capture a screen shot. Click the title bar of the crystal filter window, press Alt-PrtSc, then open the Windows "Paint" program and paste (with Ctrl-V) the image into paint, save it as a .jpg file and send it to me. Alternatively, save your configuration and send me the .k3config file. I'll also need to know what filters you have, what slots you installed them in, and the frequency offset value that's printed on the 5-pole filters. 73 de Dick, K6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Wow, that is an interesting result!
Evidently my guess was wrong. Thanks for the follow-thru message. I think I have a pair of those phones somewhere, but I found them too tight to be comfortable. 73 de Dick, K6KR -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Larry Sent: Friday, May 30, 2008 7:25 PM To: [hidden email] Subject: [Elecraft] K3 and CW problem Dick I appreciate your help in this matter but I discovered the problem. It is not the radio but my headphones. I have a pair of Kenwood HS-5 headphones and it seems they have a real dip in output below about 700Hz. I have the sidetone set at 650 Hz. When I tried a different set of headphones the problem went away. I never noticed that the speaker didn't do this either. I am kind of surprised that the HS-5 headphones have this noticeable dip in output at this range and I am surprised I never figured it out before this as I have been using these phones with my K2. But as I think about it this explains some things I noticed with my K2 but never figured out. I'll post to the list tomorrow as this might be interesting to others to know that some headphones output really drops at the lower frequencies. Larry Naumann N0SA I'm going to make a guess that the filter offset you've dialed in isn't negative. Would you connect your K3 to your PC, start the K3 Utility, navigate to the Configuration Tab, click "Edit Crystal Filters..." and verify that all the settings are correct? The frequency offset for a 5-pole crystal filter is usually negative. Do the offset values match those printed on your crystal filters? If you can, please capture a screen shot. Click the title bar of the crystal filter window, press Alt-PrtSc, then open the Windows "Paint" program and paste (with Ctrl-V) the image into paint, save it as a .jpg file and send it to me. Alternatively, save your configuration and send me the .k3config file. I'll also need to know what filters you have, what slots you installed them in, and the frequency offset value that's printed on the 5-pole filters. 73 de Dick, K6KR _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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