Eddy,
It is important where you set the audio passband. Normally, there is no
lack of high frequency response with the 2.6kHz bandpass.
Using Spectrogram to set the SSB filters, I normally recommend that you
set markers at 300 Hz and the filter width plus 200 Hz - or in your
case, 2800 Hz. Center the FL1 (OP1) passband between those markers and
try it out. With most voices and microphones, those settings are
correct, and wil work quite well for receive as well. For FL2, I use
the variable filter and set it 300 Hz less than FL1 - it is important to
measure the actual width with Spectrogram since at wide setting the
numbers shown by the K2 are usually incorrect. Set the low frequency
corner of all the SSB filter passbands at 300 Hz to maintain
intelligibility as the filters are narrowed.
If you are 'netting' with other hams at a specific frequency, you should
check your dial calibration - if you are not tuned to the actual
frequency of the other hams (because your dial calibration is off), it
could be that your audio is OK, but you are placing your transmit
frequency a bit high or low. The K2 Dial Calibration article on my
website http://w3fpr.qrpradio.com can give you the procedure for
obtaining good dial calibration.
If filter alignment as I have outlined does not solve your problem, you
may have a microphone that is lacking in response at the higher audio
frequencies, but the MH2 usually has a bit of boost for the highs - you
might want to see if one of the locals near you has an MH2 that you can
compare with.
73,
Don W3FPR
Eddy Avila wrote:
Happy Holidays All,
Getting lousy SSB tx audio reports on K2, SN 3345. I
did the Elecraft-approved 2.6khz bandwith and using
the Heil MH2 mic.
Specifically, I get reports I don't have enough highs
in my tx audio. I use the Spectrograph program to
align filters per KSB2
On K2 receive, the audio is outstanding....as good as
my ICOM 746pro.
Any help will be greatly appreciated!!
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