Wayne,
I will be happy to know when the new fw will be available for those who are
using the 8-/5- poles filters combinations in the K3. I am using Main RX:
2.7k/400/250Hz and Sub RX: 2.7k/500/200Hz...:(
Many thanks for Your attention to that in order to improve the diversity
performance etc.
Joe
A 2.8 KHz filter is not appropriate for for AM
So true
If you want to operate diversity in AM you will need one of the wider
filters.
I don't and don't recall mentioning I did want to. I do recall stating I
found this behavior accidentally.
I really wasn't expecting such a debate
Waiting for Wayne to comment sounds like a stellar idea! So say we all?
Cheers
Rick AG6AY
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-Odd-freq-shift-in-diversity-mode-after-VFO-upgrade-tp7604845p7604892.html
Sent from the Elecraft mailing list archive at
I don't know where others might come from, but for me running sound stage
diversity implies two IDENTICAL receivers each being fed to one ear.
Assigning a requirement that that all should behave normally when the
receivers are NOT identical seems unfair among other things.
Do we really want the
Rick,
I am going to go 'out on a limb' and make a wild guess that it did *not*
behave that way with the old synth boards. Wayne will likely correct me
if I am wrong.
With the old synths in diversity mode, there was one synth driving the
main RX and the other driving the subRX.
With filters
:-)
On 7/12/15 1:35 PM, rick.ag...@gmail.com wrote:
I really wasn't expecting such a debate about what others think I must not
understand.
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help:
Guy
Please note my response before your posting. It is not that I want
diversity beyond 2.8 kHz, I just accidentally did and the current side
effect of shifting the RX B passband caught be by surprise as I don't recall
this experience prior to updating the Synth boards.
I get that diversity
Rick,
A 2.8 KHz filter is not appropriate for for AM as it will
limit the maximum audio frequency to 1400 Hz (carrier +/-
filter bandwidth). If you want to operate diversity in
AM you will need one of the wider filters.
If you're not in AM, keep the bandwidth below 2.8 KHz and
there will be
If the filter offsets aren't matched, in diversity mode, the firmware has to
set up the main/sub synths differently rather than drive both receivers from
the main synth. This is supposed to be working, but there could be edge cases
not covered yet. I'm looking into that.
Wayne
N6KR
On Jul
Wayne
Something tells me I may be your signature edge case for this particular
situation. I would be happy to be an early tester.
Cheers
Rick AG6AY
--
View this message in context:
Here is what I posted on the Yahoo group just now. I hope a little time
helped clarify my description
post starts now ...
I can better explain and reproduce the issue now. Thanks to Dale WA8SRA,
Don W3FPR , and Wayne N6KR for hints along the way
I have the following 8-pole filters
Main:
Rick,
Something on that order is to be expected when you are using different
filters in the main and in the sub. The filter centers do not match,
and that leads to calculations of the filter centers which are different
- the result is that the K3 is 'confused' and the offset is the result.
Agree, Joe -- Not a bug. My recollection is that
somewhere in the (vast) info on the K3 is an
indication that it is wise to use the same filters
in Main and Sub RX.
73, Phil W7OX
On 7/12/15 9:51 AM, Joe Subich, W4TV wrote:
Wayne, is this effect something you consider a
bug?
Not a bug
Re I can work around this.: Buy two more
filters, Rick? :-)
Phil W7OX
On 7/12/15 7:13 AM, rick.ag...@gmail.com wrote:
Here is what I posted on the Yahoo group just now. I hope a little time
helped clarify my description
post starts now ...
I can better explain and reproduce the issue
Wayne, is this effect something you consider a bug?
Not a bug ... the nature of diversity since both receivers
use the main Rx synthesizer (including filter offset).
If you want to use AM and an audio bandwidth greater than
1.4 KHz (filter/2), you will need to add at least one more
filter -
I sure hope not!
Actually that raises a good question.
Wayne, is this effect something you consider a bug? I can tell you having
the sub rx shift seemingly on it's own just because I was changing the
passband was interesting to experience.
Rick AG6AY
--
View this message in context:
Joe
It's not that I want to use diversity beyond the filters I had in the sub
rx, I just accidentally discovered this effect
I am looking over Wayne's early comment about how their might be an issue
handling 8-pole vs 5-pole shifts. Could not the technique used for that
situation be applied
Rick,
When you say WWV zero beats at exactly 10.000 in USB mode, what exactly
are you zero beating? The carrier or one of the transmitted tones?
What happens if you are not in either Split or Diversity - reception on
the main receiver only (turn the SUB off)?
What the P3 should show is the
Hi all
I have a very odd thing happening in diversity mode after installing the new
VFO's. I have a K3 with dual receivers and new VFOs using a dipole and loop
antenna when in diversity. I also have a P3. I am on current 5.29 firmware
and have successfully gone through all required calibration
Everyone - much thanks for the input. I will try for a compiled response
since I had so many responses!
what exactly are you zero beating?
The WWV carrier ... well ok I'm not exactly zero beating in the proper
sense. By tuning the K3 through the 10.000 MHz WWV AM station using SSB
mode with Lo
Rick,
I'll bet that when the frequency shift occurred, you had your bandwidth
dialed to something 2.8KHz because in that situation, your Main RX
filter would have been using your 6KHz filter in slot #2, and your SUB
filter for slot #2 would have been -- EMPTY.
Have fun in the contest!
73,
Dale
Dale
Hmm. I very well could have set Hi = 3.0 and that would set up the scenario
you mentioned. Cool. That should not take long to try.
However, I don't recall an absolute requirement for filter parity between
main and sub rx as the firmware should select the largest available even
when desired
Dale
I think you may be on to something!
I just used diversity on 20M in IARU and it is obvious that
- RX A is on freq
- RX B is 1.5 kHz low
When I use BSET I see
- RX A XFIL = FL2 (6 kHz)
I hit BSET
- RX B XFIL = FL3 (2.8 kHz)
I then adjusted Hi from 3.0 kHz to 2.8 kHz.
Lo! The instant
Hi Rick,
Pay close attention to the filter bandwidth you have dialed in, and make
sure that BOTH the main receiver and sub-receiver are using filters of the
SAME bandwidth (with offset adjusted if they are not 8-pole filters). For
example, if your main RX has a 2.8 KHz filter installed and you
Rick,
If you have a combination of 5- and 8-pole filters in the main and/or sub
receivers, it's the new firmware isn't adjusting for the difference between the
two when in diversity mode with the new synths. I'll look into that, and if
it's a firmware issue, I'll get it fixed ASAP.
What
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