[Elecraft] Feature Request: SPLIT on different bands

[Oliver Großmann]

Hi elecraft team, hi list,

I'm thinking again on improvements for SO2V operation using a K3 with 
sub RX.

In my opinion operating will be much smoother if TX on 2nd VFO is possible.

I do know it is technical not possible to transmit on the frequency of 
the sub RX if it is on a different band. Due to the fact the sub RX is 
as powerful as the main RX I do have an idea.


If split is disabled and both VFOs are on different band (normal 
operation) VFOA frequency, mode, filter bw etc. are shown as usual.
If the operator enables split on different bands, swap RF paths like 
pushing the A/B button but dont swap the displayed information on the 
LCD, CAT information and left/right audio and enable the split icon on 
the LCD.
Of course this aren't all points which need to be considered and with PC 
control it is possible to operate like this, but it would be much more 
robust against operator errors if radio and software setting are consistent.


Please give a short feedback if you are with my wish or if it is against 
any operating strategy of elecraft.


Thanks Olli,
DH2WQ














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Re: [Elecraft] Feature Request: SPLIT on different bands

[Don Wilhelm]

Olli,

I think something like that would add confusion to the user interface.
In other words, you have a unique situation that is only applicable if 
split is on a different band, but the display will not reflect the 
status of the normal RX and TX parameters when in split.


73,
Don W3FPR

On 1/16/2016 7:51 AM, Oliver Großmann wrote:

Hi elecraft team, hi list,

I'm thinking again on improvements for SO2V operation using a K3 with 
sub RX.
In my opinion operating will be much smoother if TX on 2nd VFO is 
possible.


I do know it is technical not possible to transmit on the frequency of 
the sub RX if it is on a different band. Due to the fact the sub RX is 
as powerful as the main RX I do have an idea.


If split is disabled and both VFOs are on different band (normal 
operation) VFOA frequency, mode, filter bw etc. are shown as usual.
If the operator enables split on different bands, swap RF paths like 
pushing the A/B button but dont swap the displayed information on the 
LCD, CAT information and left/right audio and enable the split icon on 
the LCD.
Of course this aren't all points which need to be considered and with 
PC control it is possible to operate like this, but it would be much 
more robust against operator errors if radio and software setting are 
consistent.




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[Elecraft] 2016 Visalia Top Band Dinner

[wb6rse1]

Announcing the 2016 Top Band Dinner at the Visalia IDXC April 15, 2016.
Craig Thompson, K9CT, will present: “Top Band from Palmyra, K5P.”
There will be a self-serve buffet dinner and door prizes.
Complete details and registration information can be found at 
http://topbanddinner.jimdo.com

73! - Steve WB6RSE

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Re: [Elecraft] 75 ohm cable on Buffered I.F. Output?

[Bert Rollen]

Thanks all for the replies.

With renewed inspiration, I have dug several options out of my junk-box,
including some 6" & some 24" heliax jumpers. They are N-type, but I can
adapt.

I also found a 8" LMR-400 jumper with BNCs on it, and a few other jumpers.

(I have wy to much crap around here)


73, Bert  

BTW, the K3 is a 1500+ serial no. , but has been fully updated at the
factory a few months back.  Only thing I am missing is the KIO3B and the
4-layer main-board (and have no intent to upgrade those).


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Jensen
Sent: Friday, January 15, 2016 8:35 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] 75 ohm cable on Buffered I.F. Output?

No.  What will matter is the quality of the connectors.  The 1st IF output
from the K3 is low level, the P3 is basically a fairly sensitive HF
receiver, and bad connectors can create all sorts of problems.

You didn't give a S/N range for your K3, but there is a simple mod [destroy
one surface mount resistor and replace it with a non-SMC resistor] that will
raise the IF output.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org

On 1/15/2016 5:15 PM, Bert Rollen wrote:

> I am setting up a LP-PAN with my K3.

> Will I cause much problem by using a 75 ohm jumper on the IF ?  (I 
> happen to have several fairly nice 24" Belden 8263 BNC jumpers on hand).

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Re: [Elecraft] Feature Request: SPLIT on different bands

[Oliver Dröse]

Olli,

this is more confusion to "the normal guy" than just pressing A/B once, 
do the QSO, and get back with another A/B button press. I do it all the 
time when SO2V'ing on different bands, works like a charme. We should 
take care not to over complicate things on an already very feature rich 
radio Joe Average already has trouble with at times.


73 from another Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 16.01.2016 um 13:51 schrieb Oliver Großmann:

Hi elecraft team, hi list,

I'm thinking again on improvements for SO2V operation using a K3 with 
sub RX.
In my opinion operating will be much smoother if TX on 2nd VFO is 
possible.


I do know it is technical not possible to transmit on the frequency of 
the sub RX if it is on a different band. Due to the fact the sub RX is 
as powerful as the main RX I do have an idea.


If split is disabled and both VFOs are on different band (normal 
operation) VFOA frequency, mode, filter bw etc. are shown as usual.
If the operator enables split on different bands, swap RF paths like 
pushing the A/B button but dont swap the displayed information on the 
LCD, CAT information and left/right audio and enable the split icon on 
the LCD.
Of course this aren't all points which need to be considered and with 
PC control it is possible to operate like this, but it would be much 
more robust against operator errors if radio and software setting are 
consistent.


Please give a short feedback if you are with my wish or if it is 
against any operating strategy of elecraft.


Thanks Olli,
DH2WQ














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[Elecraft] Unstable KXPA100 output on 40 Meters.

[Hans J Rasmusen OZ7BQ]

Someone on this list may have an answer.
The output and SWR green LED status indicators on my KX3 (sn 18xx) 
KXPA100/KXAT100 (sn 08xx) combo exhibit some unusual behavour on 40 Meters CW.
The problem (if it is a problem) is present only on 40 Meters when running 80 
Watts or more, at which point the output power indicator begins to jump between 
80 and 110 watts and the SWR indicator between 1.2 and 2. 
The indications does not appear to follow the keying strictly but happens 
randomly starting a few seconds after start of keying. The indications appears 
mostly at keying speeds below approx 22 WPM using a paddle. There appears to be 
few or no indications at slow speed hand keying.I do not experience any jumping 
output indications when the KXPA is put in Tx mode by grounding the KXPA PA Key 
line.The problem disappear, if I disconnect the connection from the KX3 ACC1 to 
the KXPA.I use as a KXPACBL adaptor Cable Set.

The above problem appears to be RFI related, as the jumping output/SWR 
indications are present only when feeding an antenna. No indications are 
present when feeding a dummy load.Liberal use of ferrite on feedlines and 
cables does not appear to make any difference on this issue. I have build a 
G4HUP type RF current meter, and can not trace any common-mode RF on 
Feedlines,on power lines or on wires between KX3 and KXPA.My K2-100 does not 
exhibit any jumping output power or SWR indications on the same antennas and at 
the same power levels.

My questions are:Has anyone experienced anything similar?Is it a problem?and if 
so, where does the RF enter?
Is it likely that the RF get into the KXPA through the RDX or TDX lines on the 
RJ45 connector?

Thank you in advance, good DXOZ7BQ, 
Hans Jørgen (Joe).
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Re: [Elecraft] K3 Sub Receiver problem with KSYN3A

[Jeff]

I worked it with Howard from Elecraft and everything points to the board but 
also wanted to run it through here to see if anyone else had a problem like 
that. My K3 is an older one with the older Synthesizer boards so I can’t do any 
“swaptronix” with the boards. 

 

From: guyk...@gmail.com [mailto:guyk...@gmail.com] On Behalf Of Guy Olinger K2AV
Sent: Saturday, January 16, 2016 3:58 PM
To: Jeff 
Cc: Elecraft Reflector 
Subject: Re: [Elecraft] K3 Sub Receiver problem with KSYN3A

 

I hope that you worked that problem through with Elecraft Tech Support on the 
phone, particularly since there's the cost of a KSYN3A involved. Some troubles 
have so much stuff floating around to sort through that it's just plain 
difficult to work it via email. 

 

73, Guy K2AV

 

On Sat, Jan 16, 2016 at 12:50 PM, Jeff  > wrote:

Hello,



My Dad picked up a K3 that is a late number 9xxx it had a sub receiver and
both synthesizers are the KSYN3A. A little history on the rig first,
Original owner bought as 100 watt kit and installed the sub receiver. Second
owner installed a couple filters on the main board and the antenna tuner
KAT3 and my Dad got from him. Anyway, my Dad and I were going through it and
could not get anything out of the sub receiver, set speakers to 1 and now we
get static so that's a good sign.



Figured it was the settings so checked KRX3 and set it to Ant-BNC and hooked
up to the AUX BNC to the signal generator. Went through setup with K3
Support from Elecraft and still nothing. Checked all connections on sub
receiver and noticed that the Green LED on the sub KSYN3A was not lit like
on the main receiver KSYN3A. Swapped them and appears that the problem is on
the board because now I have a green light on the sub (originally main) and
nothing on the main (originally sub). Went to check syn status and it showed
PLL instead of SYN1 OK and SYN2 OK. No receive on main or sub.



I put them back the original way and main works but no sub Status says SYN1
OK and SYN 2 OK but no green LED light on the sub board. I ordered a new
KSYN3A for the sub so hope that works but still have no idea why no green
LED but says SYN2 OK.



Any thoughts on my long winded comment?



73,

Jeff

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Re: [Elecraft] For sale KRX3, BPF3 and filters

[Erik Basilier]

The KRX3 is still available, and I am still trying to sell it in combination
with associated options, rather than making a lot of separate transactions.
Of course, I don't expect anyone to want every filter from my 2nd receiver,
so once the main pieces are sold, I expect some filters to become available
for individual sale. 

To make a combination sale more attractive, I am now offering a special
package price:
- KRX3 (including the older synthesizer typically found in a K3)
- SSB filter upgrade to 2.8 kHz 8-pole 
- KBPF3 general receive option
Package price for this combination is now $600 + shipping.

If you are interested in this package and want to add additional filter(s),
please let me know your requirements and I can make you a special price. The
additional filters I have are: 
6.0 kHz
1.8 kHz
500 Hz (a matched pair may be available)
200 Hz (a matched pair is definitely available)

Oh, and if anyone has an INRAD 700 Hz filter for sale, please let me know.

73,
Erik K7TV


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik
Basilier
Sent: Saturday, January 09, 2016 6:11 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] For sale KRX3, BPF3 and filters

Please understand: The buyer of the KRX3 will have the first to be able to
buy any or all of the other pieces. Once that deal is closed, any left-over
pieces will be available to others.

Message delivered to ebasil...@cox.net

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Re: [Elecraft] [OT} K5P Palmyra Mystery Island

[Fred Townsend]

Two videos cover the subject:
https://www.youtube.com/watch?v=CkSHtqxKj8o
https://www.youtube.com/watch?v=GqaYWdZ9BlM

73
Fred, AE6QL
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Doug
Turnbull
Sent: Saturday, January 16, 2016 1:31 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] [OT} K5P Palmyra Mystery Island


Dear OMs and Yls,
  Elecraft is a sponsor so perhaps this off topic account of Palmyra
Island is of interest.   EI6IL did some research on Palmyra and came up with
this link which gives an interesting account of dark happenings on Palmyra
Atoll.A read of this may add some spice to your hunt.   Good luck.

http://mysteriousuniverse.org/2014/07/the-cursed-paradise-of-palmyra-atoll/

73 Doug EI2CN



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Re: [Elecraft] 75 ohm cable on Buffered I.F. Output?

[Alan]

On 01/16/2016 09:51 AM, Bert Rollen wrote:
...

With renewed inspiration, I have dug several options out of my junk-box,
including some 6" & some 24" heliax jumpers. They are N-type, but I can
adapt.


Male N connectors fit perfectly into female BNCs.  (Try it!)  The only 
downside is there is no positive retention, so you don't want to use 
this method if there is a chance the cable will get tugged on.


Alan N1AL

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[Elecraft] [OT} K5P Palmyra Mystery Island

[Doug Turnbull]

Dear OMs and Yls,
  Elecraft is a sponsor so perhaps this off topic account of Palmyra
Island is of interest.   EI6IL did some research on Palmyra and came up with
this link which gives an interesting account of dark happenings on Palmyra
Atoll.A read of this may add some spice to your hunt.   Good luck.

http://mysteriousuniverse.org/2014/07/the-cursed-paradise-of-palmyra-atoll/

73 Doug EI2CN



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Re: [Elecraft] 75 ohm cable on Buffered I.F. Output?

[Larry Phipps]

No, as long as the cable is well shielded and the connectors fit well.

Larry N8LP



On 1/16/2016 4:06 PM, elecraft-requ...@mailman.qth.net wrote:

Date: Fri, 15 Jan 2016 20:15:32 -0500
From: Bert Rollen
To:
Subject: [Elecraft] 75 ohm cable on Buffered I.F. Output?
Message-ID:
Content-Type: text/plain; charset="us-ascii"

All,

  


I am setting up a LP-PAN with my K3.

  


Will I cause much problem by using a 75 ohm jumper on the IF ?  (I happen to
have several fairly nice 24" Belden 8263 BNC jumpers on hand).

  

  


Thanks,

  


Bert

  


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Re: [Elecraft] K3 Sub Receiver problem with KSYN3A

[Jeff]

Thanks for the reply, I hope that it's the board, that way I can send in the 
"broke" one and see if they can fix it cheaper than a new one. That way I would 
be halfway to getting my K3 updated hi hi.

Anyway I got My dad's set up for him and he is tickled to have a good rig for 
CW. He'll just use RIT for DX and he is good with that for now.

73,
Jeff

-Original Message-
From: Merv Schweigert [mailto:k...@flex.com] 
Sent: Saturday, January 16, 2016 5:06 PM
To: Jeff 
Subject: Re: [Elecraft] K3 Sub Receiver problem with KSYN3A

Jeff,  not sure if anyone answered your real question,  but yes have seen 
several posts about the new Synth board stop working, and a couple not working 
from the factory,  same problem as you have,  no green light etc.
Seems to be some are having the problems,  not many but a few.

73 Merv K9FD/KH6

> I worked it with Howard from Elecraft and everything points to the board but 
> also wanted to run it through here to see if anyone else had a problem like 
> that. My K3 is an older one with the older Synthesizer boards so I can’t do 
> any “swaptronix” with the boards.
>
>   
>
> From: guyk...@gmail.com [mailto:guyk...@gmail.com] On Behalf Of Guy 
> Olinger K2AV
> Sent: Saturday, January 16, 2016 3:58 PM
> To: Jeff 
> Cc: Elecraft Reflector 
> Subject: Re: [Elecraft] K3 Sub Receiver problem with KSYN3A
>
>   
>
> I hope that you worked that problem through with Elecraft Tech Support on the 
> phone, particularly since there's the cost of a KSYN3A involved. Some 
> troubles have so much stuff floating around to sort through that it's just 
> plain difficult to work it via email.
>
>   
>
> 73, Guy K2AV
>
>   
>
>



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Re: [Elecraft] For sale KRX3, BPF3 and filters

[Erik Basilier]

The modular nature of the K3 is a wonderful thing, in that it allows the
hardware to be upgradeable. However, it does open up questions of
compatibility. When major specifications change, such as with the
introduction of the K3S, the potential for confusion increases. After
advertising my KRX3 with accessories for sale, I have received emails,
especially from beginners, showing a great deal of confusion. Configuring
the radio from scratch can be hard enough for someone without experience,
and on top of that, people are thinking of upgrades the mix components from
the K3 and the K3S.

Let me make it perfectly clear: My equipment for sale comes from a K3 of
years ago, and is meant for someone who wants to add to their K3, not
nexessarily for someone who wants to add to their K3S, nor necessarily for
someone who wants to migrate their K3 to become like a K3S. However, the
radios are very similar, and some parts may work in either radio. Personally
I have no experience with the K3S, and I have been away from the list for
the past year, so I don't know if the details of compatibility have already
been covered at length. Maybe someone at Elecraft would like to chime in at
this point to clear up the confusion that obviously still exists.

In the absence of authoritative facts to the contrary, I can merely
speculate about most of the compatibility questions. It seems clear to me
that the roofing filters have not changed at all, and work the same in both
radios.  As to the General Receive Option, I would be surprised if the
pinout and physical fit is any different between the K3 version and the K3S
version. Thus I guess the one from my K3 would "work" in a K3S, but I don't
know for sure. And if it "works", does that mean you can use it in the
context of receiving the very low frequences for experimental bands that are
supported by the K3S? I would guess the answer is NO, unless the K3S is so
designed that those very low frequencies bypass the General Coverage option
board. What about the KRX3 itself? Can it be used in a K3S? Again, I don't
know for sure, but I see no reason why not, except that it lacks coverage of
those very low receive frequencies. I would guess that the limitation is not
in the KRX3 board itself, but rather in the synthesizer board. I do believe
that the new synthesizer has the same form factor and pinout as the old one,
so you would probably be able to upgrade the KRX3 to cover the very low
bands by buying a new synthesizer. Again, I may be wrong.

73,
Erik K7TV

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik
Basilier
Sent: Saturday, January 16, 2016 2:07 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] For sale KRX3, BPF3 and filters

The KRX3 is still available, and I am still trying to sell it in combination
with associated options, rather than making a lot of separate transactions.
Of course, I don't expect anyone to want every filter from my 2nd receiver,
so once the main pieces are sold, I expect some filters to become available
for individual sale. 

To make a combination sale more attractive, I am now offering a special
package price:
- KRX3 (including the older synthesizer typically found in a K3)
- SSB filter upgrade to 2.8 kHz 8-pole
- KBPF3 general receive option
Package price for this combination is now $600 + shipping.

If you are interested in this package and want to add additional filter(s),
please let me know your requirements and I can make you a special price. The
additional filters I have are: 
6.0 kHz
1.8 kHz
500 Hz (a matched pair may be available)
200 Hz (a matched pair is definitely available)

Oh, and if anyone has an INRAD 700 Hz filter for sale, please let me know.

73,
Erik K7TV


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Erik
Basilier
Sent: Saturday, January 09, 2016 6:11 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] For sale KRX3, BPF3 and filters

Please understand: The buyer of the KRX3 will have the first to be able to
buy any or all of the other pieces. Once that deal is closed, any left-over
pieces will be available to others.

Message delivered to ebasil...@cox.net

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Re: [Elecraft] K3 Sub Receiver problem with KSYN3A

[Guy Olinger K2AV]

I hope that you worked that problem through with Elecraft Tech Support on
the phone, particularly since there's the cost of a KSYN3A involved. Some
troubles have so much stuff floating around to sort through that it's just
plain difficult to work it via email.

73, Guy K2AV

On Sat, Jan 16, 2016 at 12:50 PM, Jeff  wrote:

> Hello,
>
>
>
> My Dad picked up a K3 that is a late number 9xxx it had a sub receiver and
> both synthesizers are the KSYN3A. A little history on the rig first,
> Original owner bought as 100 watt kit and installed the sub receiver.
> Second
> owner installed a couple filters on the main board and the antenna tuner
> KAT3 and my Dad got from him. Anyway, my Dad and I were going through it
> and
> could not get anything out of the sub receiver, set speakers to 1 and now
> we
> get static so that's a good sign.
>
>
>
> Figured it was the settings so checked KRX3 and set it to Ant-BNC and
> hooked
> up to the AUX BNC to the signal generator. Went through setup with K3
> Support from Elecraft and still nothing. Checked all connections on sub
> receiver and noticed that the Green LED on the sub KSYN3A was not lit like
> on the main receiver KSYN3A. Swapped them and appears that the problem is
> on
> the board because now I have a green light on the sub (originally main) and
> nothing on the main (originally sub). Went to check syn status and it
> showed
> PLL instead of SYN1 OK and SYN2 OK. No receive on main or sub.
>
>
>
> I put them back the original way and main works but no sub Status says SYN1
> OK and SYN 2 OK but no green LED light on the sub board. I ordered a new
> KSYN3A for the sub so hope that works but still have no idea why no green
> LED but says SYN2 OK.
>
>
>
> Any thoughts on my long winded comment?
>
>
>
> 73,
>
> Jeff
>
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[Elecraft] Low power KX1

[Richard]

From: Richard [mailto:rich...@inparadise.us] 
Sent: Saturday, January 16, 2016 8:50 PM
To: Elecraft@mailman.qth.net'
Subject: Low power KX1


I am very new to the world of CW.  Several months ago I built a KX1.  Once I
was able to receive with it, I built the 30-80 band set, and once it was
installed and working, I built the ATU.  With the ATU was the first time I
was able to measure power.  I am only getting .4W out of internal, and 1W
with a 13 volt power supply.  So I did the power modification changing the
resistors, and now I get .6 internal and 2W with 13V.
 
I could sure use some advice.  I do not have a bridge or watt meter.  I do
have a good scope   Can I measure the signal voltage across 50 ohms?
 
Thank you in advance.
 
   Richard
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Re: [Elecraft] For sale KRX3, BPF3 and filters

[Joe Subich, W4TV]

On 1/16/2016 6:29 PM, Erik Basilier wrote:

In the absence of authoritative facts to the contrary, I can merely
speculate about most of the compatibility questions. It seems clear
to me that the roofing filters have not changed at all, and work the
same inboth radios.


Eric and Wayne have both stated unequivocally that other than one new
bypass capacitor on the +5V regulator (to reduce noise that impacts
frequencies below 500 KHz), the current KRX3 is no different than the
one in the "original" K3.  Your KRX3/accessories will work in any
version of the K3/K3S.

The only issue would be the need to match versions of the KSYN3.  If the 
KRX3 is going into a K3S one would need a KSYN3A.  If the KRX3 is

going into a K3 with upgraded (KSYN3A) synthesizer the KRX3 will need
the upgraded (KSYN3) synthesizer.  If the KRX3 is going into an older
K3 with original (KSYN3) synthesizer the KRX3 will need a KSYN3 and not
the KSYN3A.

Bottom line ... if the target transceiver has a KSYN3A installed,
anyone purchasing your KRX3 will need to purchase a KSYN3A from
Elecraft in order to make use of it.

73,

  ... Joe, W4TV


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Re: [Elecraft] Low power KX1

[Don Wilhelm]

Richard,

Take a careful look at the Low Pass Filter board for the KXB3080 
option.  Count the turns.  Each time the wire passes through the toroid 
core is one turn.  Make certain you have the correct number of turns.  
That LPF is the downfall of many builders.  In addition, count the turns 
on T1 - the ame thing applies.
Also on the same toroids, be certain the leads were well stripped and 
tinned.  Look at the solder side.  If you can see a ring around the 
lead, that lead was not adequately stripped and tinned.  You should be 
able to see a small bit of tinned lead on the component side of the board.
The LPF board should be *exactly* like that shown in the KXB3080 option 
manual illustrations.  There is no room for exceptions.  Be certain the 
green lead of L2 is oriented away from red lead #4.


You will need an external QRP wattmeter to properly calibrate the 
wattmeter in the KXAT1, but if you have a good 50 ohm dummy load, you 
can use your 'scope to measure the RF voltage across it.  Use a 10X 
probe on the 'scope and measure the peak to peak voltage.  If the dummy 
load is sealed, use a T adapter to gain access to the center conductor.
The power is the square of the peak to peak voltage divided by 400. 
Derivation of that formula is "left to the student".


73,
Don W3FPR

On 1/16/2016 8:53 PM, Richard wrote:

From: Richard [mailto:rich...@inparadise.us]
Sent: Saturday, January 16, 2016 8:50 PM
To: Elecraft@mailman.qth.net'
Subject: Low power KX1


I am very new to the world of CW.  Several months ago I built a KX1.  Once I
was able to receive with it, I built the 30-80 band set, and once it was
installed and working, I built the ATU.  With the ATU was the first time I
was able to measure power.  I am only getting .4W out of internal, and 1W
with a 13 volt power supply.  So I did the power modification changing the
resistors, and now I get .6 internal and 2W with 13V.
  
I could sure use some advice.  I do not have a bridge or watt meter.  I do

have a good scope   Can I measure the signal voltage across 50 ohms?
  
Thank you in advance.
  
Richard

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Re: [Elecraft] Feature Request: SPLIT on different bands

[Doug Turnbull]

Hi All,
 Yes, please be careful about feature upon feature making the menus a
nightmare.   Thank God for a good manual and KE7X books to further keep us
straight.  This is not really a radio one can operate without manuals.
Think of a ham who only has French and thankfully the K3 in not made in
Normandy or I would be in trouble.  The Orion II for a while had a bad
reputation because of what some found overly complicated menus.   The K3 has
a mass market in ham radio terms and this market helps to keep our favourite
radio company producing the best.

73 Doug EI2CN

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don
Wilhelm
Sent: 16 January 2016 14:18
To: Oliver Großmann; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Feature Request: SPLIT on different bands

Olli,

I think something like that would add confusion to the user interface.
In other words, you have a unique situation that is only applicable if 
split is on a different band, but the display will not reflect the 
status of the normal RX and TX parameters when in split.

73,
Don W3FPR

On 1/16/2016 7:51 AM, Oliver Großmann wrote:
> Hi elecraft team, hi list,
>
> I'm thinking again on improvements for SO2V operation using a K3 with 
> sub RX.
> In my opinion operating will be much smoother if TX on 2nd VFO is 
> possible.
>
> I do know it is technical not possible to transmit on the frequency of 
> the sub RX if it is on a different band. Due to the fact the sub RX is 
> as powerful as the main RX I do have an idea.
>
> If split is disabled and both VFOs are on different band (normal 
> operation) VFOA frequency, mode, filter bw etc. are shown as usual.
> If the operator enables split on different bands, swap RF paths like 
> pushing the A/B button but dont swap the displayed information on the 
> LCD, CAT information and left/right audio and enable the split icon on 
> the LCD.
> Of course this aren't all points which need to be considered and with 
> PC control it is possible to operate like this, but it would be much 
> more robust against operator errors if radio and software setting are 
> consistent.
>

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Re: [Elecraft] Controlled Envelope SSB

[Bob Novas]

I downloaded the 11x14_Hershberger zip archive and ran the cessb.m script
through a fresh install of Octave 4.0.0 on a Windows box.

- I had to install the signal package  (pkg install -forge signal)
- I have to load the signal package every time I start Octave (pkg load
signal)
- I had to comment out all lines starting with saveas - there appears to be
a bug in Octave that causes it to hang when saving plots. ("OpenGL feedback
buffer overflow). you can also just abort the gs.exe process to allow the
script to continue.  I tried adding 'graphics_toolkit("gnuplot");' as the
first line of the script, this was said to be helpful in some of the bug
reports, but didn't help me.
- if you step through the code you can see the plots, if you run the code,
you won't see the plots.

Interesting.  I can't actually hear much difference when I play the original
and processed wav files, but the script reports a power gain of 3.6db which
would be significant.

I'd love to try this out on the air!

Bob, W3DK




> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Phil
> Wheeler
> Sent: Wednesday, January 13, 2016 2:07 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Controlled Envelope SSB
> 
> That would be a very interesting development, Wayne.
> 
> 73, Phil W7OX
> 
> On 1/13/16 8:09 AM, Wayne Burdick wrote:
> > This may be possible, and we'll look into it when we get a chance.
> >
> > 73,
> > Wayne
> > N6KR
> >
> >
> > On Jan 13, 2016, at 3:07 AM, David Anderson  wrote:
> >
> >> I am still interested to know if it would be possible for Elecraft to
implement
> CESSB (which is freely available) within the KX3 DSP modulator...
> 
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Re: [Elecraft] Unstable KXPA100 output on 40 Meters.

[John Nogatch]

On Sat, Jan 16, 2016 at 7:58 AM, Hans J Rasmusen OZ7BQ
 wrote:...
> The output and SWR green LED status indicators on my KX3 (sn 18xx) 
> KXPA100/KXAT100 (sn 08xx) combo exhibit some unusual behavour on 40 Meters 
> CW...
> The above problem appears to be RFI related, as the jumping output/SWR 
> indications are present only when feeding an antenna. ...
> My questions are:Has anyone experienced anything similar?

I experienced similar problems on 40m with my K3+KPA500+KAT500, i.e.
the SWR would suddenly jump, the amplifier would fault, and the
automatic band selector antenna switch would chatter. Because the
problem only seemed to occur on 40m, I investigated the antenna, found
a loose connection, but it did not fix the problem. Eventually,
similar fault occurred on 20m.

Finally, I found that the short coaxial cable between the KAT500 and
the antenna switch was intermittent. I could observe change in receive
signal strength when I twisted the cable, near the PL-259 connector.
Substituting a different cable has completely fixed the problem. I
suspect a bad soldered shield connection in the bad cable.

At one point, while investigating this problem, receive sensitivity on
40m only, was 30 dB worse, although transmit was normal. The RX_ANT
had been activated, and there was no receive antenna connected!

-John  AC6SL
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[Elecraft] K3 Sub Receiver problem with KSYN3A

[Jeff]

Hello,

 

My Dad picked up a K3 that is a late number 9xxx it had a sub receiver and
both synthesizers are the KSYN3A. A little history on the rig first,
Original owner bought as 100 watt kit and installed the sub receiver. Second
owner installed a couple filters on the main board and the antenna tuner
KAT3 and my Dad got from him. Anyway, my Dad and I were going through it and
could not get anything out of the sub receiver, set speakers to 1 and now we
get static so that's a good sign. 

 

Figured it was the settings so checked KRX3 and set it to Ant-BNC and hooked
up to the AUX BNC to the signal generator. Went through setup with K3
Support from Elecraft and still nothing. Checked all connections on sub
receiver and noticed that the Green LED on the sub KSYN3A was not lit like
on the main receiver KSYN3A. Swapped them and appears that the problem is on
the board because now I have a green light on the sub (originally main) and
nothing on the main (originally sub). Went to check syn status and it showed
PLL instead of SYN1 OK and SYN2 OK. No receive on main or sub.

 

I put them back the original way and main works but no sub Status says SYN1
OK and SYN 2 OK but no green LED light on the sub board. I ordered a new
KSYN3A for the sub so hope that works but still have no idea why no green
LED but says SYN2 OK.

 

Any thoughts on my long winded comment?

 

73,

Jeff

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