Date   

Re: [Elecraft_K3] K3 won't TX in FT-8

Larry
 

On 1/20/2018 10:22 AM, llibsch@... [Elecraft_K3] wrote:
 

Group,

        I am unable to get my K3 to TX any RF when set up for FT-8. Hardware is K3, Behringer U-phoria UMC202HD USB sound card running on WIN XP with most recent version of WSJT-X software. FT-8 settings Radio Tab: baud 38,400, data 8, stop 1, handshake none, PTT CAT, Mode data/packet, split none. Tests of CAT and PTT are both successful. Soundcard tab is set for the Behringer card.

        Soundcard is cabled to LIne In, Line Out on K3. I am in Data A (USB) mode. K3 Menu Mic Sel is set to line in/line out. Waterfall displays signals and they decode properly.

        When I click the tune button in the FT-8 software, the K3 goes into transmit but there is no RF out. When I press the tune button on the K3 I do get RF out. When we briefly attached a headphones plug to the soundcard out lead that had been connected to the K3 line in we could hear the tuning tone when clicking on the tune button in FT-8. I do AFSK RTTY without difficulty so I do not think the line in jack is faulty.

        Ideas, please.

                                            K4KGG, Larry


On the right side of the WSJTX screen is a slider bar.  Mine is set at the 2nd bar from the top.  Might have to play with that setting to see where it kicks in reliably. Probably because the VOX sensitivity is pretty tight.  Couple of things to check.  In your WSJT settings file, set the radio type to none.   Nothing else should have to be changed.  I also use Data A.  Works for me.

larry

W0OGH


Re: [Elecraft_K3] K3 won't TX in FT-8

Ken
 

Hi Larry,
When in TX mode, make sure to adjust the Power slider (or the ouput from your sound card) to show 5 bars on the K3's ALC meter.
If the audio drops below the 5 bars, I have found that the K3's output can drop to zero. YMMV, but that works for me.
Ken - W8KEN
 

On 1/20/2018 12:22 PM, llibsch@... [Elecraft_K3] wrote:
 

Group,

        I am unable to get my K3 to TX any RF when set up for FT-8. Hardware is K3, Behringer U-phoria UMC202HD USB sound card running on WIN XP with most recent version of WSJT-X software. FT-8 settings Radio Tab: baud 38,400, data 8, stop 1, handshake none, PTT CAT, Mode data/packet, split none. Tests of CAT and PTT are both successful. Soundcard tab is set for the Behringer card.

        Soundcard is cabled to LIne In, Line Out on K3. I am in Data A (USB) mode. K3 Menu Mic Sel is set to line in/line out. Waterfall displays signals and they decode properly.

        When I click the tune button in the FT-8 software, the K3 goes into transmit but there is no RF out. When I press the tune button on the K3 I do get RF out. When we briefly attached a headphones plug to the soundcard out lead that had been connected to the K3 line in we could hear the tuning tone when clicking on the tune button in FT-8. I do AFSK RTTY without difficulty so I do not think the line in jack is faulty.

        Ideas, please.

                                            K4KGG, Larry




Re: [Elecraft_K3] K3 with SDRPlay as Panadapter using SDRConsole

redarlington
 

Pretty cool.  I have the RSP1 and ditched the LP-PAN2 as fast as I could.  $100 and far superior to the tangled mess of wires and extra hardware (sound device) associated with the LP-PAN2.      One USB cable to the RSP and one piece of coax to the rig, and no need for a P3 (although I do have one, pretty much solely for an external macro keyboard). 

-Bob - N3XKB  


On Sat, Jan 20, 2018 at 9:47 AM, oe3jtb@... [Elecraft_K3] <Elecraft_K3@...> wrote:
 

Hi group


yesterday I setup the K3 with SDRPLAY and SDRConsole

I made a little video, just for me, not to forget howto.
Here it is, https://www.youtube.com/watch?v=jmdFbFPVXGs&feature=youtu.be if anybody is intrested in :-)

73 Alex, OE3JTB




K3 won't TX in FT-8

llibsch
 

Group,

        I am unable to get my K3 to TX any RF when set up for FT-8. Hardware is K3, Behringer U-phoria UMC202HD USB sound card running on WIN XP with most recent version of WSJT-X software. FT-8 settings Radio Tab: baud 38,400, data 8, stop 1, handshake none, PTT CAT, Mode data/packet, split none. Tests of CAT and PTT are both successful. Soundcard tab is set for the Behringer card.

        Soundcard is cabled to LIne In, Line Out on K3. I am in Data A (USB) mode. K3 Menu Mic Sel is set to line in/line out. Waterfall displays signals and they decode properly.

        When I click the tune button in the FT-8 software, the K3 goes into transmit but there is no RF out. When I press the tune button on the K3 I do get RF out. When we briefly attached a headphones plug to the soundcard out lead that had been connected to the K3 line in we could hear the tuning tone when clicking on the tune button in FT-8. I do AFSK RTTY without difficulty so I do not think the line in jack is faulty.

        Ideas, please.

                                            K4KGG, Larry



K3 with SDRPlay as Panadapter using SDRConsole

Alex OE3JTB
 

Hi group


yesterday I setup the K3 with SDRPLAY and SDRConsole

I made a little video, just for me, not to forget howto.
Here it is, https://www.youtube.com/watch?v=jmdFbFPVXGs&feature=youtu.be if anybody is intrested in :-)

73 Alex, OE3JTB



KPA1500 notes

 

A few KPA1500 owners have now posted reviews here:


We’re pleased to hear such enthusiastic reports about the amp after all the hard work by both our staff and field testers. (One thing that’s clear: our decision to use a separate power supply is working well for users. They’ve commented on the very compact size of the RF deck, how it fits conveniently at their operating position.)

If you find yourself in the vicinity of Elecraft headquarters and have a few minutes to spare, please drop by for a hands-on demo of the amp or any of our other gear. 

73,
Wayne
N6KR


Re: MCU LD error on K3

Edward Seeliger KD5M
 

Good Morning Lou.
See Page 45 in the K3 manual or Page 47 in the K3s manual for Forcing a Firmware Download.
It is quite disconcerting when this happens but is easily repaired with Elecraft's process.
Edd - KD5M


Re: MCU LD error on K3

Edward Seeliger KD5M
 

Hi Lou.
See page 45 in the K3 manual or page 47 in the K3s manual - Forcing a Firmware Download.
Its happened to me several times and always is disconcerting.
Edd - KD5M


MCU LD error on K3

KE1F Lou
 

Have anybody experienced this major hardware error? (Red TX LED flashing and MCU LD displayed, K3 utility is unable to communicate with K3))
If you did how did you recover from it?
73 Lou KE1F


Re: Integration of External Band Pass Filters

Don Jones
 

Stubs will take the legal limit. RG213 ain't that expensive, trimming is easy peasy even using a MFJ259 ANT Analyzer. You just need to know how to use it to your advantage. As Jim Brown k9yc has rightly stated, good coaxial tee connectors are very difficult to come by.
Before some wise guy goes of about me and my MFJ 259, I did verify my stub networks using a ISO 17025 calibrated  Spectrum Analyzer, rf Sig gen, and 20db 18GHz rated attns. I manage EMC test lab here in WA. 

Don Jones KO7i

Sent via my wireless cell phone.


Re: [Elecraft_K3] Re: Integration of External Band Pass Filters

Randy Farmer
 

I had originally planned to build up a pair of switched stub networks for my station. After looking at the amount of parts, labor and careful tuning required for such a system, as well as the huge amount of space required, I determined that a set of the very competitively priced Low Band Systems filters between a pair of KK1L design 2X6 switches was both cheaper and WAY less work to get running. With a 2X6 you can get 4 bands of filtering with a bypass for each radio. I left out the filters for 160 and 10 since I normally don't try to do SO2R with one radio on 160 and didn't really need to worry about harmonics from 10. The system works very well.

73...
Randy, W8FN

On 1/16/2018 8:22 AM, ko7i ko7i@... [Elecraft_K3] wrote:
 
I would use a coaxial stub network on the 20m output of the amplifier. Ref W2VJN Reducing Intra-station Interference book, page 55 figure 44. 
Works great. 

Don Jones KO7I


Re: Integration of External Band Pass Filters

Don Jones
 

I would use a coaxial stub network on the 20m output of the amplifier. Ref W2VJN Reducing Intra-station Interference book, page 55 figure 44. 
Works great. 

Don Jones KO7I 

Sent via my wireless cell phone.


Re: [Elecraft_K3] Integration of External Band Pass Filters

Dave Hachadorian
 

Here’s another thought.  There is a carrier-operated relay on the Rx ANT IN connector.  If the signal is high, the relay disconnects the Rx antenna.  Maybe it also reconnects the main antenna?
 
It could be that the second harmonic of the 20 M transmitter is overloading the COR, causing it to reconnect the main antenna, which is not protected by the bpf?
 
To reduce the second harmonic of the 20M transmitter, an 11’ 6” closed stub could be attached to the 20M feedline.
 
Dave Hachadorian, K6LL
Yuma, AZ

 

From: aa3b.bud@... [Elecraft_K3]
Sent: Monday, January 15, 2018 1:39 PM
To: Elecraft_K3@...
Subject: [Elecraft_K3] Integration of External Band Pass Filters
 
 

I am experiencing an issue with band pass filters (BPF) here that I don’t understand and I am hoping that someone can help me work through it.

 

I have been experimenting with BPFs to eliminate interference while doing single operator two radio contesting (SO2R).

 

My K3 includes the KRX3 sub receiver, KAT3 ATU and KXV3 option.  The BPFs are 100W units manufactured by LPS.

 

My experiment tested two configurations as follows:

 

1.  BPFs connected in series with the coax going to the rear panel Antenna 1 connector.

2.  BPFs connected between the rear panel connectors RX ANT IN and RX ANT OUT.  The RX antenna was activated from the front panel.

 

I transmitted a 500 CW signal on 10M and the K3 was receiving on 10M.

 

Configuration 1 worked fine with no interference heard on 10M.   Configuration 2 did not work – strong interference was present and I got a “High Signal” warning.  I would have expected similar performance in both configurations. 

 

I really would like to use Configuration 2 as a permanent solution but it appears not to work.  Any advice?

 

73,

 

Bud AA3B




Re: [Elecraft_K3] Re: Integration of External Band Pass Filters

Bud Trench
 

Dave,


I think the problem is that there is something active in the receive antenna switching that is getting clobbered by RF coming through the main feed line.  The RX Ant In / Out path works (Configuration 2), when I am not transmitting on the second radio; I can tell this because all bands are blocked on receive except the one corresponding to the BPF.


Thanks for the tip on the Elecraft reflector.


73,


Bud AA3B


Re: [Elecraft_K3] Re: Integration of External Band Pass Filters

Randy Farmer
 

When transmitting on 20 meters and listening on 10 meters the receiver is seeing the 2nd harmonic energy from the 20 meter transmitter. A 10 meter BPF in the receiver input will provide zero discrimination against the 10 meter harmonic signal. You need a 20 meter BPF in the transmitter output to suppress the harmonic energy generated by the transmitter.

At the transceiver output, assuming a K3 with 100W output, the transmitter output is probably going to be around 0 dBm at the 2nd harmonic. (100W = +50 dBm with about 50 dB rejection from the transmitter LPF). Adding a 20 meter BPF at the transmitter output with another 45 dB of harmonic rejection (typical for the LBS filters) will drop the harmonic level to -45 dBm. With a reasonably small amount of coupling between the transmit and receive antennas, this may be enough filter rejection to make the situation tolerable. If you're using an amplifier then you'll definitely need a high power BPF at the amplifier output. Limiting the 2nd harmonic input to the amplifier won't do any good, since the amp itself will generate harmonic energy. And the filters will have to have an additional 12dB of harmonic rejection to handle the difference between the 100W transceiver level and the 1500W amplifier output.

I live on a very small lot and my antennas are closely coupled. I have found with my station that I need both a set of 200W BPFs at the transceiver output and a second set of high power LBS filters cascaded in the antenna line to make SO2R practical, even without an amplifier.

I'll be happy to send you a copy of a presentation I did at Dallas Ham-Com last year on SO2R RF Engineering if you're interested.

73...
Randy, W8FN

On 1/15/2018 3:15 PM, aa3b.bud@... [Elecraft_K3] wrote:
 
Clarification to my last message:

"I transmitted a 500W CW signal on 20M and the K3 was receiving on 10M."


Re: [Elecraft_K3] Re: Integration of External Band Pass Filters

Dave Hachadorian
 

Bud,
 
It sounds like the Rx Antenna switch is not disconnecting the main antenna, and the receiver is still hooked to the main antenna port.
 
What happens if you connect the bpf directly to RX ANT IN, without using the ANT OUT loop?
 
Also, maybe you would get more help by posting on the main Elecraft Reflector, rather than the K3 Reflector.
 
73
 
Dave Hachadorian, K6LL
Yuma, AZ

 

From: aa3b.bud@... [Elecraft_K3]
Sent: Monday, January 15, 2018 2:15 PM
To: Elecraft_K3@...
Subject: [Elecraft_K3] Re: Integration of External Band Pass Filters
 
 

Clarification to my last message:
 
"I transmitted a 500W CW signal on 20M and the K3 was receiving on 10M."

 


Re: Integration of External Band Pass Filters

Drew Vonada-Smith K3PA
 

Hi Bud,

I use switched low power BPFs at the input of each transceiver (K3 and FT5k), so I have not tried your RX loop method.  But I took a look at the block diagram and those two inputs are not electrically equivalent, so a few things occurred to me:

1) If there is no filter at the main ANT1 (when its in the RX loop), is it possible that the ingress is so high as to fire the GDT on that input?   I can't find the value of GDT they used.  If that happens all bets are off, of course.  But it seems unlikely as I believe you have high power filters in the system also.  

2) The same thought with regards to the linearity of the ANT1/2 T/R switch.  It is not in the RX antenna loop.

3) The RX loop is on the other side of the TX low pass filter array from ANT1.  So, the out of band impedances presented to the filter by RX in/out may be a lot different than they are at ANT1.  Those high order filters might be pretty sensitive to that.  Perhaps that plays havoc with rejection?  

4) There's quite a bit of circuitry in the transverter/RX ant board that I have not had time to go through in detail.  But if the RF amplitudes were above a diode drop...one would have to take a peek.

I guess you would need a spec an or VNA to investigate some of that unless someone has already done the exercise.  Do you know the amplitude of the 20M energy in the 10M radio front end when there is no filter?  That would narrow the likely scenarios.   

73,
Drew K3PA


---In Elecraft_K3@..., <aa3b.bud@...> wrote :

Clarification to my last message:

"I transmitted a 500W CW signal on 20M and the K3 was receiving on 10M."

---In Elecraft_K3@..., <aa3b.bud@...> wrote :

I am experiencing an issue with band pass filters (BPF) here that I don’t understand and I am hoping that someone can help me work through it.

 

I have been experimenting with BPFs to eliminate interference while doing single operator two radio contesting (SO2R).

 

My K3 includes the KRX3 sub receiver, KAT3 ATU and KXV3 option.  The BPFs are 100W units manufactured by LPS.

 

My experiment tested two configurations as follows:

 

1.  BPFs connected in series with the coax going to the rear panel Antenna 1 connector.

2.  BPFs connected between the rear panel connectors RX ANT IN and RX ANT OUT.  The RX antenna was activated from the front panel.

 

I transmitted a 500 CW signal on 10M and the K3 was receiving on 10M.

 

Configuration 1 worked fine with no interference heard on 10M.   Configuration 2 did not work – strong interference was present and I got a “High Signal” warning.  I would have expected similar performance in both configurations. 

 

I really would like to use Configuration 2 as a permanent solution but it appears not to work.  Any advice?

 

73,

 

Bud AA3B



 


Re: Integration of External Band Pass Filters

Bud Trench
 

Clarification to my last message:

"I transmitted a 500W CW signal on 20M and the K3 was receiving on 10M."



Integration of External Band Pass Filters

Bud Trench
 

I am experiencing an issue with band pass filters (BPF) here that I don’t understand and I am hoping that someone can help me work through it.

 

I have been experimenting with BPFs to eliminate interference while doing single operator two radio contesting (SO2R).

 

My K3 includes the KRX3 sub receiver, KAT3 ATU and KXV3 option.  The BPFs are 100W units manufactured by LPS.

 

My experiment tested two configurations as follows:

 

1.  BPFs connected in series with the coax going to the rear panel Antenna 1 connector.

2.  BPFs connected between the rear panel connectors RX ANT IN and RX ANT OUT.  The RX antenna was activated from the front panel.

 

I transmitted a 500 CW signal on 10M and the K3 was receiving on 10M.

 

Configuration 1 worked fine with no interference heard on 10M.   Configuration 2 did not work – strong interference was present and I got a “High Signal” warning.  I would have expected similar performance in both configurations. 

 

I really would like to use Configuration 2 as a permanent solution but it appears not to work.  Any advice?

 

73,

 

Bud AA3B




Re: [Elecraft_K3] K-Pod Labels

David Cutter
 


Thanks, that will  be helpful to get me going.
 
David
G3UNA
 

----- Original Message -----
Sent: Monday, January 15, 2018 5:11 PM
Subject: RE: [Elecraft_K3] K-Pod Labels

 

I have a bunch of K3 macros in the Yahoo Groups DXLab Files area.  I use those in DXLab’s Commander rig control module..  The K-Pod has the advantage of being able to use macros when I’m using N1MM+ instead of DXLab, my general logger.

I have just a few in my K-Pod, and I’ll attach that file to this email.  If it doesn’t work, I’ll upload it to the Files area of this Yahoo Group.  The CTS UP/DOWN macros adjust the VFO’s tuning rate.

73, Jim N7US

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Monday, January 15, 2018 10:57
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K-Pod Labels






Jim

I just bought a K-Pod.  Would you care to share your macro listing?

David

G3UNA

----- Original Message -----

Sent: Monday, January 15, 2018 4:22 PM

Subject: RE: [Elecraft_K3] K-Pod Labels

 

I have an Excel file with the sixteen macros in a small box and a screenshot of the K3 Utility with the macro labels and commands for reference.  I print and clip the section with the macros and keep it handy.

I can generally remember those I use often.

73, Jim N7US

From: Elecraft_K3@... [mailto:Elecraft_K3@...]
Sent: Sunday, January 14, 2018 06:23
To: Elecraft_K3@...
Subject: Re: [Elecraft_K3] K-Pod Labels





I have a Brother PT-H100 using 6mm tape. Once again I don’t have the K-Pod in front of me but I used 2 or 3 characters to label the different buttons top and bottom. For example short tap B+, long tap B-, etc. There is room for both labels on the outside edge of each button.

73 Jeff kb2m

Sent: Sunday, January 14, 2018 7:04 AM

Subject: Re: [Elecraft_K3] K-Pod Labels





I have a label printer, but the labels are too large for the K-Pod.  Also, mine don't stick very well.  What model do you have?

John K1ESE

On Sun, Jan 14, 2018 at 6:59 AM, kb2m@... [Elecraft_K3] <Elecraft_K3@...> wrote:

 

I use a label printer I picked up at Staples for around 15$. It’s also very useful for labeling coax cables. I put the labels on over a year ago and they are still in place. I’d post a picture but my K3 is at my summer home, winter remote site. Also, I think I have volume control, sorta. I can mute and return volume to a preset level with the K-Pod...

73 Jeff kb2m

Sent: Sunday, January 14, 2018 6:17 AM

Subject: [Elecraft_K3] K-Pod Labels

Received a new K-Pod last week.  It has added a lot of enjoyment to using the K3.  It's not perfect, sure wish it could control volume or RF gain, but overall a nice addition to the shack.

There are buttons for 16 macros..  I doubt most of us can remember that many separate controls by seeing the F1 through F8 buttons. 

Has anyone come up with a way to put some labels on the very small spaces around each button?  I'm using chunks of Post-it.  They extend over the edge of the K-Pad and like to fall off.  There must be a better way.

John K1ESE