Firmware request KRC2
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I wonder if it is possible to make the K3 "lie" to the KRC2 that 50 MHz is via a transverter? This would help my switching problem and I think might be of general use to those upgrading from K2+XV50 to K3.
Mike |
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If you use the BCD outputs on the ACC jack and J4 on the KRC-2 (pg 24 of the KRC-2 manual), 6 meters will show up as the 60M band. 73, ... Joe, W4TV > -----Original Message----- > From: [hidden email] > [mailto:[hidden email]] On Behalf Of AD6XY > Sent: Saturday, August 30, 2008 10:20 AM > To: [hidden email] > Subject: [Elecraft] Firmware request KRC2 > > > > I wonder if it is possible to make the K3 "lie" to the KRC2 > that 50 MHz is via a transverter? This would help my > switching problem and I think might be of general use to > those upgrading from K2+XV50 to K3. > > Mike > -- _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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That is a very good idea Joe. I will try but it will need pull up resistors fitting in the KRC2. Also because I use transverters I will have to solder 4 more wires and it will need two multicore cables soldering onto that 15 way din and that is very difficult because of the size with a connector designed for only one cable. I will also need to put an ALC line in there once the ALC +- issue is finalised. I had hoped only to have the K3 linked simply through the KRC2 to my transverters (like for my K2). If only the non-atu version of the K3 had two outputs. Mike |
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Mike,
Try it using the AUXBUS control before connecting the BAND0-3 outputs from the ACC connector. If I recall, the AUXBUS control will also activate the 60 meter KRC2 output when 6 meters is selected on the K3. Even if my memory is incorrect, it is worth a try, it is an easy matter to connect the AUXBUS signal from the K3 to the KRC2. 73, Don W3FPR AD6XY wrote: > > That is a very good idea Joe. > > I will try but it will need pull up resistors fitting in the KRC2. Also > because I use transverters I will have to solder 4 more wires and it will > need two multicore cables soldering onto that 15 way din and that is very > difficult because of the size with a connector designed for only one cable. > I will also need to put an ALC line in there once the ALC +- issue is > finalised. I had hoped only to have the K3 linked simply through the KRC2 to > my transverters (like for my K2). > > If only the non-atu version of the K3 had two outputs. > > Mike > > > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.169 / Virus Database: 270.6.13/1642 - Release Date: 8/29/2008 6:12 PM > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Mike,
I have been looking at the KRC2 manual and was reminded that the KRC2 can use serial band decoding. You might want to try it because it seems to be the easiest (but I am still unsure about the 6 meters/60 meters decoding. You will have to set the K3 (and any logging/computer control applications) to work at 4800 bps because right now, the KRC2 can only use that data rate - that could change in the future, but right now it is fixed at 4800. Install jumpers at W9, W10, W11, W15, W16, W20, W21, W22, and W23 to allow operation of a logging program (or other PC application) through the KRC2 and on to the K3 as well as allowing the KRC2 to communicate with the K3. Then install a jumper on W3 to tell the KRC2 to use serial band decoding. I believe that is all you need to do - other than providing power to the KRC2 through its coaxial power jack and connecting the KRC2 J2 connector to the K3 serial port . To connect to the PC, add a serial cable between the KRC2 and the PC - use standard serial straight thru cables. I have not tried this combination, but from my study of the KRC2 manual, it should work just fine. I don't know how 6 meters is decoded, but I believe it may activate the 60 meter KRC2 outputs, with no output available for 60 meters (or maybe they map together - someone else will have to say). Try it and let us know how it works. 73, Don W3FPR Don Wilhelm wrote: > Mike, > > Try it using the AUXBUS control before connecting the BAND0-3 outputs > from the ACC connector. > If I recall, the AUXBUS control will also activate the 60 meter KRC2 > output when 6 meters is selected on the K3. > > Even if my memory is incorrect, it is worth a try, it is an easy > matter to connect the AUXBUS signal from the K3 to the KRC2. > > 73, > Don W3FPR > > AD6XY wrote: >> >> That is a very good idea Joe. >> >> I will try but it will need pull up resistors fitting in the KRC2. Also >> because I use transverters I will have to solder 4 more wires and it >> will >> need two multicore cables soldering onto that 15 way din and that is >> very >> difficult because of the size with a connector designed for only one >> cable. >> I will also need to put an ALC line in there once the ALC +- issue is >> finalised. I had hoped only to have the K3 linked simply through the >> KRC2 to >> my transverters (like for my K2). >> If only the non-atu version of the K3 had two outputs. >> >> Mike >> >> >> >> ------------------------------------------------------------------------ >> >> >> No virus found in this incoming message. >> Checked by AVG - http://www.avg.com Version: 8.0.169 / Virus >> Database: 270.6.13/1642 - Release Date: 8/29/2008 6:12 PM >> > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.169 / Virus Database: 270.6.13/1642 - Release Date: 8/29/2008 6:12 PM > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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That might work! Presumably the other features of the KRC2 would not work without also having the auxbus connected - not a big loss for me. It is something I will try as it is only going to need a 9-way serial cable with pins 4 & 6 disconnected via W16 and W20 just in case.
Considering all the other signals on the 15 way connector that I may need some day, I think perhaps the long term solution will be to construct a break out board from the 15 way to include a 9 way din for transverters and KRC2 a connection for the band data, an ALC level converter op-amp and phono sockets for the other signals (PTT. 2 Digital outputs, PTT, FSK and remote power on). Point-point or a fairly simple PCB. If I make a PCB I might as well decode the band data while I am at it. Mike |
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Mike,
For use with the K3 serial port, put in the jumpers for a thru connection on pins 4 and 6 so any computer application you may want to use can have access to these K3 serial port pins for PTT and keying. 73, Don W3FPR AD6XY wrote: > That might work! Presumably the other features of the KRC2 would not work > without also having the auxbus connected - not a big loss for me. It is > something I will try as it is only going to need a 9-way serial cable with > pins 4 & 6 disconnected via W16 and W20 just in case. > > Considering all the other signals on the 15 way connector that I may need > some day, I think perhaps the long term solution will be to construct a > break out board from the 15 way to include a 9 way din for transverters and > KRC2 a connection for the band data, an ALC level converter op-amp and phono > sockets for the other signals (PTT. 2 Digital outputs, PTT, FSK and remote > power on). Point-point or a fairly simple PCB. If I make a PCB I might as > well decode the band data while I am at it. > > Mike > > > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.169 / Virus Database: 270.6.14/1643 - Release Date: 8/30/2008 5:18 PM > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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The other method with AUXBUS almost works.
The new firmware has a "compatibility mode" added to the KRC2 config menu of the K3. This should make the KRC2 show up as 10m or 60m on 6m. It actually shows up as 160m with my system. So, as long as we don't mind 160m mapping to 6m that is a solution. But I also discovered some other issues that had me confused. If you loop through your transverters the 8R line (K3 Acc Pin 10 Key - Out LP) can not provide voltage drive for the 8R line of the KRC2. That was a surprise, the manual says it should be good for 10mA and only has a series 220 ohm resistor, but from the schematic it looks like it is an open collector line (Q7 on the main IO board). I suppose I am supposed to pull it up. OK, I know I should look at the schematics but the manual should have been clearer on this if that is the case. The same goes for Pin 7 on the K3 which can not be used to provide the drive for the KRC2. This is a logic I/O line and you need to use an external PSU. I removed D2 from the KRC2 to avoid overloading the K3 should the KRC2 PSU not be connected. The loop through is needed if you want to drive a KRC2 and a transverter. Mike |
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