[Elecraft] K2: SSB / CW Reception Oddity - sensitivity difference

[Bill Coleman]

I just finished the KNB2 on my K2. (Now I'm just waiting for the KPA100 
<grin>)

After buttoning my K2 back up and re-arranging my operating desk, I was 
tuning around 40m getting familiar with the radio. One strange thing I 
noticed was the signals with the OP1 filter were substantially stronger 
than on the CW filter. A 40m SWBC carrier that was S9 + 20 dB on SSB was 
only S5 on the CW filter, even when it had been centered in the filter!

The next night, while trying to troubleshoot this problem, I removed the 
KSB2. I replaced it with wire jumpers across the outside pins of the two 
3-pin jacks surrounding the CW crystal filter (essentially what the wire 
jumpers did - but it wouldn't work for transmit, since C167 is gone). 

CW reception seemed fine. The 40m SWBC carrier was S9 + 20 dB. At least 
the CW filter is working right.

Re-installed the KSB2. Now everything works fine -- carrier signals are 
the same strength on the OP1 or the CW filter (so long as they are 
centered). 

Anyone run across this?

--

I also got an INFO 080 earlier in the week. It just popped up in the 
middle of using the K2. After removing every option, I got rid of this 
one by removing the IOP and replacing it in the socket. Weird.



Bill Coleman, AA4LR, PP-ASEL        Mail: aa4lr@arrl.net
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901