K3: Firmware 3.03 introducing artifacts?

[JerL]

If one uses the new birdie removal feature, can you then receive
normal signals at that spot, or does a 'hole' remain there that would
prevent one from receiving any signal at that same spot?

regards, Jerry

--

[hidden email]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

[Guy, K2AV]

Jerry Lockett wrote

If one uses the new birdie removal feature, can you then receive
normal signals at that spot, or does a 'hole' remain there that would
prevent one from receiving any signal at that same spot?

regards, Jerry

You will hear normal signals. There is no hole.  The K3 is making offsetting changes to conversion frequencies which produce the same RX frequency and at the same time shift the birdies off your listening frequency. The birdies are harmonics and IM off the individual conversion frequencies.

73, Guy

[.hank.]

Guy, K2AV wrote

Jerry Lockett wrote

If one uses the new birdie removal feature, can you then receive
normal signals at that spot, or does a 'hole' remain there that would
prevent one from receiving any signal at that same spot?

regards, Jerry

You will hear normal signals. There is no hole.  The K3 is making offsetting changes to conversion frequencies which produce the same RX frequency and at the same time shift the birdies off your listening frequency. The birdies are harmonics and IM off the individual conversion frequencies.

73, Guy

---
I have not tried this - I don't seem to have any birdies on the CW frequencies that I use, but from what you say - you are not removing birdies, you are moving them out of the way and then when you change frequencies to where you moved the birdie you would have to move it back?

73    Hank    K8DD
---

[Barry N1EU]

Guy, K2AV wrote

Jerry Lockett wrote

If one uses the new birdie removal feature, can you then receive
normal signals at that spot, or does a 'hole' remain there that would
prevent one from receiving any signal at that same spot?

regards, Jerry

You will hear normal signals. There is no hole.  

This weekend I removed a birdie on 20m ssb and did notice a "hole" in the tuning - tuning seemed to jump 100hz+/- as I was tuning in a ssb station that was right on the "cleansed" frequency.  I undid the birdie removal because the faint birdie was preferable to the tuning jump.

73,
Barry N1EU

[Guy, K2AV]

.k8dd. wrote

I have not tried this - I don't seem to have any birdies on the CW frequencies that I use, but from what you say - you are not removing birdies, you are moving them out of the way and then when you change frequencies to where you moved the birdie you would have to move it back?

73    Hank    K8DD

As soon as the small frequency segment containing the birdie is past, the K3 transparently restores the normal conversion frequency regimes. All the arithmetic is done for you. Birdies are shifted out only in segments that the operator chooses to identify in the elimination procedure. Birdies differ in frequency and level from radio to radio, and even whether they surface at all.  Fewer birdies surface using the usual CW bandwidths.

To Barry, there is not supposed to be a hole.  Contact Elecraft with your specifics.

73, Guy.