Re: [Elecraft] K3 band data query

Message -- From: "Dennis Ashworth" To: Elecraft@mailman.qth.net Sent: 2020-10-18 2:28:42 PM Subject: [Elecraft] K3 band data query I operate a vertical antenna for 80 & 160M where the bandwidth is such that I need to switch in reactance between the phone and CW portions o

Re: [Elecraft] K3 band data query

Wait a minute. The Arduino is usually programmed in C, not Assembly. :-) 73 Bill AE6JV On 10/18/20 at 4:21 PM, k...@outlook.com (Ken K6MR) wrote: This is easy to do with an Arduino if you are capable with those kind of things. The serial port on the Arduino can read the data from the K3,

[Elecraft] K3 band data query

Hi Dennis, I can recommend the following site. I am using a band decoder and I have built an antenna coupler for my double zepp. https://remoteqth.com/ 73 Chris, DL2MDU __ Elecraft mailing list Home:

Re: [Elecraft] K3 band data query

om: Dennis Ashworth<mailto:dennisashwort...@gmail.com> Sent: Sunday, October 18, 2020 11:30 To: Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net> Subject: [Elecraft] K3 band data query I operate a vertical antenna for 80 & 160M where the bandwidth is such that I need to switch in reactanc

Re: [Elecraft] K3 band data query

; Sent: Sunday, October 18, 2020 11:30 To: Elecraft@mailman.qth.net<mailto:Elecraft@mailman.qth.net> Subject: [Elecraft] K3 band data query I operate a vertical antenna for 80 & 160M where the bandwidth is such that I need to switch in reactance between the phone and CW portions

Re: [Elecraft] K3 band data query

Dennis, Frequency data is available from the RS-232 data, but needs decoding which implies that a smart device is needed (computer). See the K3 Programmer's Reference Manual for the commands and responses. 73, Don W3FPR On 10/18/2020 2:28 PM, Dennis Ashworth wrote: I operate a vertical

[Elecraft] K3 band data query

I operate a vertical antenna for 80 & 160M where the bandwidth is such that I need to switch in reactance between the phone and CW portions of each band. I currently do this manually, but am installing vacuum relays for switching remotely. Is there a way the K3, through the data port or

Re: [Elecraft] K3 Band Data

Very grateful Clay Pedro, EA4KD -Mensaje original- De: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] En nombre de Clay Autery Enviado el: domingo, 12 de enero de 2020 9:57 Para: elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 Band Data Here you go

Re: [Elecraft] K3 Band Data

n Wilhelm [mailto:donw...@embarqmail.com] Enviado el: domingo, 12 de enero de 2020 1:24 Para: Pedro, EA4KD; Elecraft@mailman.qth.net Asunto: Re: [Elecraft] K3 Band Data Pedro and all, The first K3 had band data outputs that were driven by open drain FETs. That means that the receiving unit had t

Re: [Elecraft] K3 Band Data

Asunto: Re: [Elecraft] K3 Band Data Pedro and all, The first K3 had band data outputs that were driven by open drain FETs. That means that the receiving unit had to provide the pullup voltage to operate properly. Since almost no one in the amateur community understood the benefits of using open

Re: [Elecraft] K3 Band Data

Pedro and all, The first K3 had band data outputs that were driven by open drain FETs. That means that the receiving unit had to provide the pullup voltage to operate properly. Since almost no one in the amateur community understood the benefits of using open drain or open collector devices

[Elecraft] K3 Band Data

I am the owner of an old K3 (Nov 2007 # 188) and now I need to use Band Data outputs. As they did not work I have been looking for the problem and found that a long time ago there was a board that sold Elecraft to solve the problem (REMIOUPGD) for K3 before December 2008, but that is no longer

Re: [Elecraft] K3 Band Data Information Needed

You do NOT need to use the band data lines. Please read the SPE 1.5K-FA manual, et al.  CAT via RS232 works fine/better. There are also other functions you can use. Watch this video for what you need to know and a lot more... https://www.youtube.com/watch?v=Ku8Gyl0amRY 73,

Re: [Elecraft] K3 Band Data Information Needed

K3/K3S Owner’s Manual shows Band Outputs data in page 21. I am referring K3S Owner’s manual A1. 73 de JH3SIF, Keith > 2018/07/20 16:51、Barry Simpson のメール: > > I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using > the band data available on the K3 Aux In/Out socket. > >

[Elecraft] K3 Band Data Information Needed

I want to interface my K3 with a newly acquired SPE 1.5KFA amplifier using the band data available on the K3 Aux In/Out socket. Elecraft refer to the data as Bands 1,2,3 and 0 whereas SPE (and other manufacturers) call them Bands A,B,C and D. Please can someone let me know if A,B,C,D = 1,2,3,0

Re: [Elecraft] K3 band data lines

I've done an experiment. I got a 7805 and powered it from a separate power supply. The negative of the 7805 is connected to the GND of the arduino. If I connect the 5V from the 7805 to one of the digital inputs, the arduino powers up and executes my program, lighting up the leds as expected. If

Re: [Elecraft] K3 band data lines

The opto isn’t needed. Just a low-voltage-drop diode (1N5711 should work) with cathode towards the K3, pullup resistor (47K to 100K) to +5V (or whatever the Arduino runs on, might be 3.3V), then the Arduino input pin. This will protect the Arduino from being falsely powered from the K3. This

Re: [Elecraft] K3 band data lines

I'm not familiar with Arduino circuit details, however... logic inputs typically have a clamp diode to Vcc. So, if you are applying 5V to an input without powering the circuit, in other words, Vcc=0, then you are forward biasing the protection diode. This is very likely what is powering the

[Elecraft] K3 band data lines

Hello, I'm trying to make my own interface between the band data lines on the accessory connector of the K3 and the remote antenna switch. I have a few questions that I hope you can help me with: - is it safe to just poll the band lines with the arduino digital input pins? I understand that

Re: [Elecraft] K3 band data lines

I have built a similar switch controller. If anyone wants a copy of the details, please ask. Specifically: - Just connect te band lines directly to the Arduino inputs. It works fine. - Don't know about cross band split. However K 3 power off and 60M look the same. - I don't bother. I don't

Re: [Elecraft] K3 band data lines

Thanks Bill. My point about the tx inhibit was that I plan to have a "manual selection" button, and I was thinking that maybe it would be nice to have a "fool avoidance" built in. The fool being me, of course. Pf > "Bill" == Bill Frantz writes: Bill> I have

Re: [Elecraft] K3 band data lines

This can work. But it can cause problems as well. You should add isolation in the form of either small diodes (cathode towards K3) or small resistors (maybe 100 ohms). The problem is that if the Arduino is left powered on when the K3 is off, the Arduino can actually leak power into the K3

Re: [Elecraft] K3 band data lines

The band input line pins are set up as input on the Arduino. As such, they are high impedance, so I don't think there is any way to drive them from the Arduino (short of changing the program/sketch). I normally leave my switch controller powered on with the K3 powered off, and have not

Re: [Elecraft] [K3] Band data problem

Joe/Don There are lots of ways to skin the cat. If you took apart the RCS12 you'd see why the the mod to the K3 is by far the easiest approach. Four resistors, easily applied. The power dissipation increase on the drivers is a few milliwatts (4 * (5v/600) * 0.1) and inconsequential in the

Re: [Elecraft] [K3] Band data problem

A follow up to the K-Line and RCS12 integration. The problem was that the RCS12 was excessively loading the band data lines. The fix was additional drive on the pullups on those lines inside the K3. I used 820 ohms in parallel with each of the internal 2.2K pullups and all is now working well.

Re: [Elecraft] [K3] Band data problem

Paralleling the 2.2K resistors with 820ohms brings the combination to 600ohms which in series with the 220ohms results in 820ohms to +5V which when driving the RCS12 inputs yields 3V remaining on the band data lines. This provides a sufficient level for a 1 with reasonable noise margin. I

Re: [Elecraft] [K3] Band data problem

Hi Joe There's certainly more than one way to deal with this. External buffer chips are an inexpensive solution. I didn't want yet another piece of clutter in my already box and cable littered shack so I chose to mod the K3. The K3 driver chips are not an issue at all. Any additional external

Re: [Elecraft] [K3] Band data problem

I didn't want yet another piece of clutter in my already box and cable littered shack so I chose to mod the K3. In all probability an inverting buffer or possibly a pair of low drive, dual optoisolators could replace the 2N3904 transistors directly. I suspect the transistors are simply

Re: [Elecraft] [K3] Band data problem

I would suggest if modification to the RCS-12 is in order, the 2N3904s be changed out for switching FETs such as the 2N7000. The change Jim made will result in only 8 ma of drain current for the drivers in their off state. I believe the band data drivers in the K3 are similar to the

Re: [Elecraft] [K3] Band data problem

Senior moment: I confused the KIO3 with the KXV3. I have long ago updated the latter to the A version. So my KIO3 and the associated connector module are almost certainly lacking pullups. I'll open the K3 tomorrow and confirm and if true try to add the 2.2K pullups found on the newer model's D-sub

[Elecraft] [K3] Band data problem

I've recently added an MFJ RCS12 controller to my K3/KPA3 setup and I'm having some problems. I've built and checked the BANDDATA cable and it only has the four BCD lines plus ground. I'm using the Elecraft Y-cable and Keyline interrupter. (The KEYOUT signal is connected to the KPA500 via the

Re: [Elecraft] [K3] Band data problem

Jim, The problem comes when I add the KPA500. The RCS12 continues to read and follow the band changes from the K3 but the KPA500 switches to 5.3 (60m) and stays there regardless of K3 front panel switches.The KPA500 also operates properly when the cable is connected to the Y connector but

Re: [Elecraft] [K3] Band data problem

I've gotten feedback on and off list that will help me in figuring this out. I'll debug it over the weekend and post results and my solution. Thanks! jim ab3cv __ Elecraft mailing list Home:

[Elecraft] K3 band data 15 pin plug

The radio will output band data band 0-3 would this correspond to a-d or would it be d-a? -- Mike W0MU J6/W0MU November 21 - December 1 2011 CQ WW DX CW W0MU-1 CC Cluster w0mu.net __ Elecraft mailing list Home:

Re: [Elecraft] K3 band data 15 pin plug

Mike, Band 0 = A, Band 1 = B, Band 2 = C, Band 3 = D 73 Win DK9IP Am 11.10.2011 22:23, schrieb W0MU Mike Fatchett: The radio will output band data band 0-3 would this correspond to a-d or would it be d-a? __ Elecraft mailing list

Re: [Elecraft] K3 band data 15 pin plug

Thanks! That is what I suspected! Mike W0MU J6/W0MU November 21 - December 1 2011 CQ WW DX CW W0MU-1 CC Cluster w0mu.net On 10/11/2011 2:29 PM, Win Kriegl DK9IP/KH7CD wrote: Mike, Band 0 = A, Band 1 = B, Band 2 = C, Band 3 = D 73 Win DK9IP Am 11.10.2011 22:23, schrieb W0MU Mike

[Elecraft] K3 Band Data Output

How are K3s being shipped regarding the Band Data output? Are new radios including the pull-up resistors, or are they still all being shipped with open drains? Phil - AD5X ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a

Re: [Elecraft] K3 Band Data Output

On page: http://www.elecraft.com/K3/k3_app_notes.htm Included on All K3s shipped on Dec 10, 2008 and later. (Rev B KIO3 Digital board) 73, doug From: Phil Debbie Salas dpsa...@tx.rr.com Date: Fri, 16 Jan 2009 13:06:17 -0600 How are K3s being shipped regarding the Band Data output?

Re: [Elecraft] K3 Band Data Output

New K3s shipping now have the pull ups. 73, Eric WA6HHQ Phil Debbie Salas wrote: How are K3s being shipped regarding the Band Data output? Are new radios including the pull-up resistors, or are they still all being shipped with open drains? Phil - AD5X

Re: [Elecraft] K3 Band Data Output

Do they also have the negative ALC included? Jerry W4UK At 19:53 1/16/2009, Eric Swartz - WA6HHQ, Elecraft wrote: New K3s shipping now have the pull ups. 73, Eric WA6HHQ Phil Debbie Salas wrote: How are K3s being shipped regarding the Band Data output? Are new radios including the

[Elecraft] K3 Band Data

Is the K3 band data compatible with Yaesu (ex:FT1000D) BCD band data. Looks to me that it is, or? 73 Jim SM2EKM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change,

[Elecraft] K3 Band Data

Is the K3 band data compatible with Yaesu (ex:FT1000D) BCD band data. Looks to me that it is, or? 73 Jim SM2EKM Yes it is, EXCEPT remember that the K3 band data outputs are open drain, whereas the Yaesu output is TTL. So your external band decoding device needs to have internal pull-up

RE: [Elecraft] K3 Band Data

To: Elecraft Reflector Subject: [Elecraft] K3 Band Data Is the K3 band data compatible with Yaesu (ex:FT1000D) BCD band data. Looks to me that it is, or? 73 Jim SM2EKM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must

Re: [Elecraft] K3 Band Data

: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jan Erik Holm Sent: Friday, December 05, 2008 4:00 AM To: Elecraft Reflector Subject: [Elecraft] K3 Band Data Is the K3 band data compatible with Yaesu (ex:FT1000D) BCD band data. Looks to me that it is, or? 73 Jim SM2EKM

RE: [Elecraft] K3 Band Data

] [EMAIL PROTECTED]','','','')[EMAIL PROTECTED] On Behalf Of Jan Erik Holm Sent: Friday, December 05, 2008 4:00 AM To: Elecraft Reflector Subject: [Elecraft] K3 Band Data Is the K3 band data compatible with Yaesu (ex:FT1000D) BCD band data. Looks to me that it is, or? 73 Jim SM2EKM

RE: [Elecraft] K3 Band Data

, 2008 11:30 AM To: '' Jan Erik Holm ''; elecraft@mailman.qth.net; 'Joe; Subich; W4TV' Subject: RE: [Elecraft] K3 Band Data The Elecraft KRC-2 and W9XT Band Decoders do not have pull-up resistors and will require the addition of 2.2 - 10K resistors Not true of the KRC2 IF you are using

RE: [Elecraft] K3 Band Data

; 'Joe; Subich; W4TV' Subject: RE: [Elecraft] K3 Band Data The Elecraft KRC-2 and W9XT Band Decoders do not have pull-up resistors and will require the addition of 2.2 - 10K resistors Not true of the KRC2 IF you are using the AuxBus line. I have the K3 ACCY AuxBus connected

[Elecraft] K3: Band Data (renamed)

Oh dear, you have made me a little worried now Ian. I use two Topten Band Decoders, with new source driver boards. Each one has a cable wired for Yeasu, ie terminated in a Din plug which goes into the Band Data out socket on the FT1kMP. One also has a twin screened lead which picks up Amp