Bill,
Congratulations, it sounds like you have achieved success.
Once set the K2 alignment usually remains stable for a long time. If it
ain't broke, don't fix it!
Don W3FPR
On 6/17/2019 10:36 AM, Bill Coleman wrote:
Well, I think I finally got it sorted.
I replaced D1 and D2 on my
Well, I think I finally got it sorted.
I replaced D1 and D2 on my KAT100. One of the diodes was good, the other was
likely bad since I couldn’t get the SWR bridge to null, but I destroyed it
while extracting it from the board.
New diodes are in machined socket pins, which will make them easy
Bill,
Yes, do the CAL FIL calibration first. If that does not cure anything,
then proceed with the rest of the alignment, but I doubt if that will
help much - the K2 alignment is usually quite stable over time.
The bandpass filter and other alignments are not going to change the
relationship
Yeah, this is looking more like a calibration problem.
I’m listening to W1AW code practice on 14.0475. As I cycle through the filters
the S-units are roughly the same through OP1, 0.4 and 0.16. But on the 1.0
bandwidth, it is often 1-2 S-units lower. If I tune about 200 Hz lower, I get
the
Fortunately, I found the Rework Eliminators easily.
Swapping out the KSB2 for the eliminators didn’t evidence a change in the CW
variable bandwidth filter.
It’s weird, it appears to be working OK at the moment, but the CW 1.0 filter
sounds weird. LSB and USB sound a little weird, too.
I
Bill for receive, you only need the jumpers at J9 and J10 - it is quick
and easy to do with bent wires if you do not find the rework eliminators
is short order.
Those jumper wires will not complete the transmit path - only receive.
73,
Don W3FPR
On 6/11/2019 5:03 PM, Bill Coleman wrote:
I
I own a set of Rework Eliminator modules, so that should be easy.
I just have to find them….
> On Jun 11, 2019, at 3:09 PM, Don Wilhelm wrote:
>
> Bill,
>
> First try removing the KSB2 - put bent wire jumpers between pins 1 and 3 of
> J9 and J10. Then see if you get a good response in CW.
>
Bill,
First try removing the KSB2 - put bent wire jumpers between pins 1 and 3
of J9 and J10. Then see if you get a good response in CW.
Oh BTW, make sure the CW filters are centered at your sidetone pitch
first - use an audio spectrum analyzer and if you have one, a broadband
noise
OK, I have a K2/100 w/ KAT100 that may have recently suffered from a static
discharge event. I had to replace D16 & D17 in the KPA100, and I’m likely to do
the same to the SWR bridge diodes in the KAT100 (since I can’t get the bridge
to null properly).
The other thing I noticed is that the
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