[Elecraft] K3 and CW problem

[Dick Dievendorff]

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: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Larry
Sent: Friday, May 30, 2008 7:25 PM
To: elecraft at mailman.qth.net
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

 

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