Just for yuks, I opened it up to see....what if the SSB adapter had been
installed,
and somebody pulled it out?
Sure enough, C167 was tacked messily to the top of the board.
According to the
schematic, you remove that when you install the SSB adapter.
That's good news. It means I just build the adapter, remove messily
tacked-on C167,
plug the adapter in, and align. Don't have to take the front panel
apart.
...or so I hope.
- Jerry KF6VB
On 2021-06-25 15:24, Don Wilhelm wrote:
Many filters constructed using the newer crystals do not have that
tilt, especially at narrow filter widths.
Wide filter widths do have both tilt and passband ripple.
Having aligned almost 2000 K2s, I can say this with certainty.
73,
Don W3FPR
On 6/25/2021 6:06 PM, Louandzip via Elecraft wrote:
The passband of the filter has a tilt (the SSB module's filter is
much better) When you switch between CW and CWR, the slope of the
filter reverses with respect to the base band, so it sounds
different. It's not that unusual for other rigs to do this to a
lesser degree. Of course where the filter is centered depends on BFO
alignment which must be done for each width and both USB and LSB.
On Friday, June 25, 2021, 4:04:34 PM MDT, Don Wilhelm
<d...@w3fpr.com> wrote:
Jerry,
You will quickly get used to the UI. If you do not have a manual,
download one from Elecraft.
As another 'helper' one of my friends who was just getting used to the
K2 created a chart of all buttons with their functions as well as the
menu. You can download that chart from my website www.w3fpr.com.
Look
near the bottom of the home page for the link to the chart. If you
print it, you can make it into a handy tri-fold that is a convenient
'accessory' to the K2.
The CW/CW-R situation is definitely associated with the BFO
frequencies.
There are 4 filter widths for each mode and a BFO for upper sideband
and
another for lower sideband associated with each filter.
I would wait until you have the KSB2 installed and do any upgrades
that
you want before trying to align the filters and their BFOs. If you
change the RF board crystals, you will need to realign the filters and
BFOs - likewise with the addition of the KSB2 option. The KSB2 option
instructions give you some suggested settings, but you can do a lot
better by running the K2 audio into an audio spectrum analyzer running
on your computer - the visual display of the receive passband makes
that
task easy.
You will need the internal counter probe if one was not included with
your K2, Elecraft does sell a kit of parts.
I can give you help with the Dial Calibration and Filter alignment.
73,
Don W3FPR
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