[Elecraft] SSB Filters

[Dan Barker]

Failing miserably to get my K2 sounding right on my own, I grabbed the =
telephone and called Elecraft. I had LSB sounding OK, and USB off in =
left field. None of my numbers were within 400 Hz of the "book" values. =
Gary said that was fine.=20

Gary talked me through the procedure for a K2 with recent firmware and =
the KSB2 adapter installed.

 a) Bend C180 back and forth until it breaks off, and discard.=20
 b) Fire up Spectrogram; and set a marker at 400 and 2200 Hz.=20
 c) Move the FL1 BFO freq. until it's balanced between the marks.=20
 d) Repeat for the other sideband.=20
 e) Diddle L34 to flatten the top of the USB response, but not so far as =
to screw up the LSB response.
 f) Repeat centering the response curves if necessary.

My results below:

      USB

  Picture suppressed on reflector, see =
http://www.visioncomm.net/ssb.html

      LSB

  Picture suppressed on reflector, see =
http://www.visioncomm.net/ssb.html

I just spend about an hour on SSB with Steve in GA, and he says both =
Sidebands sound FB, and the same. Cool!

So, what's this about a flattening mod? Doesn't really look like one is =
needed.

Dan / WG4S / K2 #2456, KAT2, K160RX, KIO2, KSB2

PS: Now, How do I get on PSK? The MH2 ain't gonna cut it! I'm a gonna =
need some WIRE! (who ever called this hobby wireless? - They're nuts!).