Date   

Re: K3 for CW

 

I am 99.99% on CW. I have 250-400-1k-1k8-2k8 8-pole filter set in both main and sub RX (10 filters total!). My K3 #7554 with new synthesizers is the best radio I used in my 50+ years of ham radio activity. Good QSK is a mandatory for me, I do often also QRQ up to 60 wpm.

Your choice of K3 is excellent.

73,
Martin, OK1RR

P.S. I strongly hate clicking antenna relays, the fast & silent PIN diode switching (K3 and KPA500) is mandatory for any rig in the future.


Dne 02. 10. 20 v 17:39 SGS 126 napsal(a):

I have recently gotten back into CW and I want to get a K3 purely for CW. I have seen plenty of K3/100/AT for under $2000. My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency. I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

Thanks, Ben KJ4CC





Re: K3 for CW

K9MA
 

If you look at the published curves for the two filters, you will see that the skirts of the narrow one aren't really much better than the wide one. So, even with the narrow filter, below 400 Hz, the DSP is doing most of the work.

73,
Scott K9MA

On 10/3/2020 5:44 PM, Steve VE3RX wrote:
I agree with Thomas. While I'm not a real "CW" operator, I do use it during some contests. I have the 400 and 250, 8 pole filters. I find the 400 is usually good enough, and with the DSP bandwidth width, I can trim down the bandwidth from there. Once I hit 250, it is real tight and I find not too much better than the DSP turned down to 300Hz with the 400 filter. That said, the odd time, I do need 100-150Hz or so for some real tight DX with pileups, it does help. The only thing I don't know is how different it would be with 400Hz filter and DSP turned down to 100Hz vs a 250 filter and DSP width turned down to 100Hz.
I think you will be happy with a 400 filter, to start with. You can always add another filter later if you feel up to it. There is not a lot of difference in bandwidth between the 250 and 400Hz (8 pole) filters, maybe about 65Hz at -6dB. Not sure of the difference with the 5 pole filters.

73
Steve

73
Steve


-- 
Scott  K9MA

k9ma@...


Re: K3 for CW

Steve VE3RX
 

I agree with Thomas. While I'm not a real "CW" operator, I do use it during some contests. I have the 400 and 250, 8 pole filters. I find the 400 is usually good enough, and with the DSP bandwidth width, I can trim down the bandwidth from there. Once I hit 250, it is real tight and I find not too much better than the DSP turned down to 300Hz with the 400 filter. That said, the odd time, I do need 100-150Hz or so for some real tight DX with pileups, it does help. The only thing I don't know is how different it would be with 400Hz filter and DSP turned down to 100Hz vs a 250 filter and DSP width turned down to 100Hz.
I think you will be happy with a 400 filter, to start with. You can always add another filter later if you feel up to it. There is not a lot of difference in bandwidth between the 250 and 400Hz (8 pole) filters, maybe about 65Hz at -6dB. Not sure of the difference with the 5 pole filters.

73
Steve

73
Steve


Re: Microphone bias with the K3/0-mini and RemoteRig

Mark Morin
 

My pleasure, Scott.
The pin-out of the DB15 connector is in the K3-Remote manual so I knew I could get 8 VDC on pin 1. The mic bias circuit in the K3-0 mini is super simple so I had no problem figuring out how it worked by following the traces and poking around with a voltmeter. That’s how I came up with the mod. But I’m not completely fearless so, before actually doing it, I did run it by Elecraft support just in case I was missing something.
Good luck,  Mark VA2MM 
 


Re: K3 for CW

Colin Smithers
 

I have had two of the 250 Hz filters fail open circuit. Fortunate that they are not really needed.

73, G4CWH


On 3 Oct 2020, at 21:44, K9MA via groups.io <K9ma@...> wrote:


I also have those filters, but I wouldn't recommend the 250 Hz one. It really isn't much better than the 400 Hz one, by either Elecraft's published data or my own measurements. I think for those times when a bandwidth of less than 400 Hz is required, the 400 Hz filter with the DSP set narrower would work just as well. Even with the 250 Hz filter, it's not quite as good at rejecting nearby QRM as my old FT-1000D, with two cascaded 250 Hz filters, but at least the K3 doesn't have key clicks.

73,
Scott K9MA

On 10/3/2020 1:28 PM, Thomas Doligalski via groups.io wrote:
I have both the 400 hz and the 250 hz 8 pole filters. Honestly, I rarely use the 250, and often have the bandwidth open wider than 400 hz. 

Tom W4KX

 

On Oct 3, 2020, at 12:59 PM, SGS 126 <brloper@...> wrote:



I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


-- 
Scott  K9MA

k9ma@...


Re: K3 for CW

K9MA
 

I also have those filters, but I wouldn't recommend the 250 Hz one. It really isn't much better than the 400 Hz one, by either Elecraft's published data or my own measurements. I think for those times when a bandwidth of less than 400 Hz is required, the 400 Hz filter with the DSP set narrower would work just as well. Even with the 250 Hz filter, it's not quite as good at rejecting nearby QRM as my old FT-1000D, with two cascaded 250 Hz filters, but at least the K3 doesn't have key clicks.

73,
Scott K9MA

On 10/3/2020 1:28 PM, Thomas Doligalski via groups.io wrote:
I have both the 400 hz and the 250 hz 8 pole filters. Honestly, I rarely use the 250, and often have the bandwidth open wider than 400 hz. 

Tom W4KX

 

On Oct 3, 2020, at 12:59 PM, SGS 126 <brloper@...> wrote:



I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


-- 
Scott  K9MA

k9ma@...


Re: Microphone bias with the K3/0-mini and RemoteRig

Scott Townley
 

Mark, 
Thanks a ton for that info!  Now at least I know I'm not crazy.
Curious where you got the K3-0 Mini schematic?  Or were you brave enough to just open it up and wing it?


Re: K3 for CW

Rob Sherwood
 

Remember that the crystal filters are roofing filters, and you can operate CW even if you only have the standard 2.7 kHz filter.  Set the DSP for any bandwidth you want.  Of course in a pile-up a 400 or 500-Hz roofing filter is more optimum.    Rob, NC0B

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Thomas Doligalski via groups.io
Sent: Saturday, October 03, 2020 12:28 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] K3 for CW

 

I have both the 400 hz and the 250 hz 8 pole filters. Honestly, I rarely use the 250, and often have the bandwidth open wider than 400 hz. 

 

Tom W4KX

 



On Oct 3, 2020, at 12:59 PM, SGS 126 <brloper@...> wrote:



I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


Re: K3 for CW

Thomas Doligalski
 

I have both the 400 hz and the 250 hz 8 pole filters. Honestly, I rarely use the 250, and often have the bandwidth open wider than 400 hz. 

Tom W4KX

 

On Oct 3, 2020, at 12:59 PM, SGS 126 <brloper@...> wrote:



I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


Re: K3 for CW

Michael Kopec
 

Hello Ben. Great that your pushing toward CW operation especially with a K3. I have been told by Elecraft that the K3s(s) that they loan to the DXpeditions are outfitted with 400hz and 250hz 8-pole filters for CW operation. my K3s has the 400hz 8-pole and a 200hz filter for tight contest type operation. Normally I use the 400hz filter with the DSP width set to 250hz or 300hz. Works for me. The width is variable with a front control knob so no getting into the menu reqd to change after initial filter set-up. Have fun and GL de Mike K8NS

On Saturday, October 3, 2020, 12:59:20 PM EDT, SGS 126 <brloper@...> wrote:


I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


Re: K3 for CW

Lou Kolb
 

Ben,

I can tell you that when I got my k3-100 10 years ago, my CW operation
jumped from 50 per cent to around 80 per cent. As you've surmised,
it's a great CW rig.
As for filters, I suggest iether the 400hz or 200hz filters. The 200
is a good idea if you want to do a lot of contest or DX operating. If
your operating is more casual, the 400hz filter does a fine job. I use
an 8 pole 400hz filter, which does a terific job. Good luck. Lou
WA3MIX

On 10/2/20, SGS 126 <brloper@...> wrote:
I have recently gotten back into CW and I want to get a K3 purely for CW. I
have seen plenty of K3/100/AT for under $2000. My code speed is between
13-18 wpm, but I am trying to get proficient so that is why I am looking at
the K3 to use for code and build up my proficiency. I presently have an Icom
7300 which I know would work fine but I like that the Elecraft uses PIN
diodes for switching. Any recommendations on must-have filters?

Thanks, Ben KJ4CC






K3 RTTY issues with N1MM+

Ronald PA3EWP
 

Hello,

 

During the RTTY contest last weekend we noticed a problem that our transmitted text was abrupted.

A lot of times our call was transmitted as PI4C or PI4CO instead of PI4COM.

 

We used the latest version of N1MM+, MMTTY, Microkeyer MK2 and a Elecraft K3.

N1MM was configured as SO2V.

 

If I looked at the digital interface window the text was transmitted, at the end the software disabled the PTT of the radio.

But the radio was still busy transmitting the text, the FSK led was still flashing, but the software disabled the PTT.

I try to find what was happening or was changed, but I couldn’t find any solution for it.

 

So we changed it to AFSK and all worked fine again.

If I started MMTTY without N1MM it worked fine.

 

I checked it at after the contest and I come to the following conclusion:

The same computer setup with another K3 radio, other Microkeyer interface => same results.

Same computer setup with TS990, no problem

Other computer setup with the same K3, same problem.

 

I asked a friend to test his K3 and he has the same issue.

 

I hope someone has a solution for it, I am sure it must be something simple, but I can’t find it.

 

 

 

Ronald

PA3EWP

 

Contestgroup Oude Maas

30th anniversary callsign: PI30COM

http://www.pi4com.nl

 

 

 


Re: USB Issue K3S

Robert W5AJ
 

The message in Windows control panel -> Device manager

 

if you see the message

http://pages.suddenlink.net/w5aj/Prolific.jpg

 

telling you this is not Prolific, then you’ve got counterfeit adapter and loaded later version of driver (which Win10 will do automatically)

 

The counterfeit can be saved by loading older driver, however the best path is get on Amazon and order one with FTDI chip

 

However a K3S (another forum) uses USB link to the rig, not RS232

https://images-na.ssl-images-amazon.com/images/I/61VOzIYiR6L._SL1500_.jpg

Your USB cable must have plug similar to that in link

As you plug and unplug it, you’ll see COM port and audio board added into Device manager

do you have K3S set to USB (instead of RS232) in config menu?

 

73 W5AJ

 

Robert

Midland, Texas

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Kelly Breed
Sent: Sunday, September 20, 2020 2:22 PM
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] USB Issue K3S

 

If you have managed to get Prolific usb to serial drivers installed that may be your problem. If you using a cable from Elecraft I’m pretty sure it uses an FTDI chip. I went through this and finally got the Prolific driver un-installed and everything started working.

 

Kelly

AJ6KZ



On Sep 20, 2020, at 9:18 AM, Everett N4CY via groups.io <everettsharp@...> wrote:

 

Just recently was unable to find any Ports listen in the K3 Utility for my K3S I checked to make sure it was set to Configure-RS232-USB. I also tried another USB cable to the computer and also switched ports, but still no joy. I also reinstall the drivers from the Elecraft website . Any help/guidance would be greatly appreciated.

 

Everett N4CY

 


K3 for CW

SGS 126
 

I have recently gotten back into CW and I want to get a K3 purely for CW.  I have seen plenty of K3/100/AT for under $2000.  My code speed is between 13-18 wpm, but I am trying to get proficient so that is why I am looking at the K3 to use for code and build up my proficiency.  I presently have an Icom 7300 which I know would work fine but I like that the Elecraft uses PIN diodes for switching. Any recommendations on must-have filters?

 

Thanks, Ben KJ4CC


Re: Microphone bias with the K3/0-mini and RemoteRig

Mark Morin
 

Sorry, I don't seem to have the privileges to upload a photo of the completed modification as I had promised above. I'll have to send it to you by email off-list.

Mark VA2MM


Re: Microphone bias with the K3/0-mini and RemoteRig

Mark Morin
 
Edited

Ok, I dug up the details of the K3-0 Mini modification that I did to increase the mic bias on the front panel mic connector to 8V.  

Original K3-0 Mini design: pin 6 of the mic connector has a 1K pull-up resistor (R61) to 5V.  My mic required 8V and more current than this resistor would provide (excessive voltage drop).

Modification: 
  1. Removed R61 (1k pull-up resistor), which originally provides the 5 Vdc bias
  2. Soldered one lead of a resistor to pin 1 of the DB15 connector (this is 8V from the RRC TTL connector. This voltage is jumper-selectable in the RRC to be either 8V or 9V). Since my amplified mic draws about 10 mA, I chose to use a 100 ohm resistor instead of 1k. A higher value like 1k would be better for simple electret microphones that don't draw significant current).
  3. Solder a small wire from the other end of the resistor to the now-empty pad of R61 that is closest to J10. 
I will post a photo showing the completed mod. 

This worked for me but of course it goes without saying that any modification that you perform is at your own risk. 

Good Luck

Mark VA2MM


Re: Microphone bias with the K3/0-mini and RemoteRig

Mark Morin
 

Hi Scott,

Yes, you’re right. I devised a modification to correct the bias voltage to 8V and discussed it with Elecraft support before doing it (got their blessing). It involves soldering in a wire and resistor. I documented my mod and sent it to Elecraft. Works well for me with my Icom mic. I can post more details later this morning. 

Mark VA2MM 


Microphone bias with the K3/0-mini and RemoteRig

Scott Townley
 

I've used the K3/0-mini and RRC boxes quite a bit in a mobile setup.  Since 99.999% of my operation was CW I didn't have to deal with many of the idiosyncrasies of the K3/RRC combo.
Now the plan is to reuse the setup in a true remoted operation, and wanting to include SSB/digi modes I have to tame this beast.
One thing I've noted is that I only can get SSB output with the Elecraft MH-2 mic...nothing else works (although other headsets/mics worked fine on the full K3).  In digging through this, I discovered that the microphone bias (DC voltage on Pin 1 of the front-panel Foster connector) is only 4.7V instead of 8V--and even more puzzling, it has no relation whatever with JMP1 in the RRC (which supposedly controls mic bias).  Whether JMP1 is in or out, the DC voltage on Pin 1 is 4.7V.  I've tried two different RRC/control boxes with two different K3/0-mini cable assemblies with the same result.

Has anyone else noticed this?  It seems that the out-of-the-box Elecraft version of the K3/0-mini+RRC setup is intended only for the hand mic, and that any other form of audio interfacing has to be done directly at the RRC Aux/Mic port.


Re: K3 wanted

Bob McGraw - K4TAX
 

I use my K3S with my DEMI transverters. Works great and very easy to interface.

Bob, K4TAX


Re: K3 wanted

Tim Hague M0AFJ
 

Hi Gerd, I’ve made a bid on your K3, fingers crossed

I want it to use as a high end driver for my DEMI transverters, low phase noise for hill topping, I bought a IC 9700, very big mistake.

73 Tim M0AFJ
IO70ic