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Posted: 6/27/2018 8:34:56 PM EDT
I'm using my KX3 on the Digital Net.
When I narrow my filters on 40m, I get a weird bite out of the middle of my passband.
It does not do that on 20m.  I can narrow the filters there as much as I want without the bite out of the middle.
What setting did I screw up this time?  







Link Posted: 6/27/2018 8:41:55 PM EDT
[#1]
Quoted:
I'm using my KX3 on the Digital Net.
When I narrow my filters on 40m, I get a weird bite out of the middle of my passband.
It does not do that on 20m.  I can narrow the filters there as much as I want without the bite out of the middle.
What setting did I screw up this time?  

https://i.imgur.com/h6wA5gQ.jpg

https://i.imgur.com/mbXcywM.jpg

https://i.imgur.com/aT3yFsI.jpg

https://i.imgur.com/FY6Zz8E.jpg
View Quote
Are you in the dual pass band mode on 40m?

Edit:  Nope...my K3 won't go into the dual pass band mode while in the data mode.
Link Posted: 6/27/2018 8:45:10 PM EDT
[#2]
That's the beauty with elecraft.   Email their support.  They are a great company.  I built some add-ons for a k2.  I bought the kits used but missing a few components and elecraft still sent me the missing parts
Link Posted: 6/27/2018 8:55:51 PM EDT
[#3]
I need a "KX3 Filters For Dummys" class.  
Link Posted: 6/27/2018 9:03:18 PM EDT
[#4]
Is your notch filter on?
Link Posted: 6/27/2018 9:07:54 PM EDT
[#5]
I've tried it both with and without the notch filter on.  Makes no difference.
Link Posted: 6/27/2018 9:58:21 PM EDT
[#6]
Discussion ForumsJump to Quoted PostQuote History
Quoted:

Are you in the dual pass band mode on 40m?

Edit:  Nope...my K3 won't go into the dual pass band mode while in the data mode.
View Quote
Kekoa is right!  I was not in data mode on 40m, and was on 20m.  Is the REV supposed to be on, on 40m data?  Can't get it to go off, but everything works now.
That fixed the problem!
Thank you, Kekoa and phurba for the suggestions!

Link Posted: 6/27/2018 10:09:58 PM EDT
[#7]
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Kekoa is right!  I was not in data mode on 40m, and was on 20m.  Is the REV supposed to be on, on 40m data?  Can't get it to go off, but everything works now.
That fixed the problem!
Thank you, Kekoa!
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Quoted:
Quoted:

Are you in the dual pass band mode on 40m?

Edit:  Nope...my K3 won't go into the dual pass band mode while in the data mode.
Kekoa is right!  I was not in data mode on 40m, and was on 20m.  Is the REV supposed to be on, on 40m data?  Can't get it to go off, but everything works now.
That fixed the problem!
Thank you, Kekoa!
All digital modes are USB regardless of band. I usually use USB instead of data mode on all radios just because it tends to be easier. Data mode seems to make too many assumptions.
Link Posted: 6/27/2018 11:13:19 PM EDT
[#8]
Ha, I didn't really think about the data mode.  I thought it might be something to do with the dual band pass filter.

Well anyway,  glad it's working again.
Link Posted: 7/12/2018 11:46:41 AM EDT
[#9]
The Dual Band Pass filtering that BD was experiencing may have been because he was in RTTY mode. In fact it is about the only explaination.
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