[Elecraft] KRC2 question
When I shut off the radio (K4 or K3) the KRC2 stays selecting the antenna for the freequency that was last sent from the radio over the Aux bus. Is there any way to have the KRC2 remove any antenna selection when the radio is turned off?? thanks, Gordon - N1MGO __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] KRC2 Question
I'm thinking of ordering a KCR2 Band Decoder from Aptos. I'm trying to figure out how it could be configured to control antenna selection based on mode of operation. My station has Yagi beams for UHF/VHF weak signal work, and also verticals for FM and repeater use. I know I can get the KCR2 set up to select the appropriate relay readout for a given band, but I can't see a way to automate the process of selecting between the two available antenna on (for example) 2 meters. Obviously I can do this with a manual switch setup. Any way to automate it so that I won't forget to change antennas when I switch from SSB to FM? Thanks, Lew K6LMP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KRC2 question
Hi all, I have two devices which requires band data. 1.)Bandpass filter with 12 volt input lines per band 2.)Antenna switch which requires a BCD coded input for automatic switching My intention is to use KRC2 in serial mode. I understood from documentation BCD coded band data information will be available on J4 in serial mode. However I am not sure about this topic. My main interest is, could I use one KRC2 to support both devices at the same time ? 73 de Joerg (DL3QQ) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KRC2 question
Hello: I'm contemplating changes to my station arrangement which presently includes an Alpha DAS (digital antenna switch) which gets its signals from the amplifier via RS-232 cabling. I would like to change this situation to have the DAS switch with changes in band from the transceiver, presently an FT-1000 MkV (via its Band Data port). Has anybody come across this situation ? Is this what the KRC2 is designed to accomplish ? 73, Jamie WB4YDL ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
Re: [Elecraft] KRC2 question
There is no “power off” indication sent to the Auxbus from the K3 or K4, so no, there isn’t a direct way for the KRC2 to know if the radio is off. Having said that, my KRC2 is powered through a relay that is controlled by the K3’s +12V out jack. It is powered on with the K3 and likewise powered off when the K3 is shut down. That causes the drivers to be shut down and all antennas disconnected. 73! Jack, W6FB > On Jan 16, 2022, at 8:42 AM, Gordon LaPoint wrote: > > When I shut off the radio (K4 or K3) the KRC2 stays selecting the antenna for > the freequency that was last sent from the radio over the Aux bus. > > Is there any way to have the KRC2 remove any antenna selection when the radio > is turned off?? > > thanks, > > Gordon - N1MGO > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jackbrin...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] KRC2 Question
Lew, You are correct, the KRC2 cannot do that directly, but it does have the AC outputs that can be put to use such that with a bit of external diode logic it can be semi-automatic. I say semi-automatic because the selection of the AC outputs depend on tapping or holding the 4 buttons on the KRC2. Secondly, the KRC2 does not decode 2 meters, so you would have to improvise something. It could be made to work after some fashion by using the band data outputs of the K3 and substituting the decode for 2 meters with some other band. I believe that a less expensive band decoder and a manual switch is the KISS solution. The K3 has no output that indicates the mode, so a SMART solution involving a dedicated processor that polls the K3 for the relevant data on the RS-232 bus would be the only automated solution that I can think of. 73, Don W3FPR On 1/23/2011 9:22 AM, Lew Phelps K6LMP wrote: > I'm thinking of ordering a KCR2 Band Decoder from Aptos. > > I'm trying to figure out how it could be configured to control antenna > selection based on mode of operation. My station has Yagi beams for UHF/VHF > weak signal work, and also verticals for FM and repeater use. I know I can > get the KCR2 set up to select the appropriate relay readout for a given band, > but I can't see a way to automate the process of selecting between the two > available antenna on (for example) 2 meters. > > Obviously I can do this with a manual switch setup. Any way to automate it so > that I won't forget to change antennas when I switch from SSB to FM? > > Thanks, > > Lew K6LMP > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 Question
Sorry, but I was hasty and erred in that last post by saying the KRC2 does not decode 2 meters - it does not directly, but the TRN outputs can be configured to select 2 meters. 73, Don W3FPR Lew, You are correct, the KRC2 cannot do that directly, but it does have the AC outputs that can be put to use such that with a bit of external diode logic it can be semi-automatic. I say semi-automatic because the selection of the AC outputs depend on tapping or holding the 4 buttons on the KRC2. Secondly, the KRC2 does not decode 2 meters, so you would have to improvise something. It could be made to work after some fashion by using the band data outputs of the K3 and substituting the decode for 2 meters with some other band. I believe that a less expensive band decoder and a manual switch is the KISS solution. The K3 has no output that indicates the mode, so a SMART solution involving a dedicated processor that polls the K3 for the relevant data on the RS-232 bus would be the only automated solution that I can think of. 73, Don W3FPR On 1/23/2011 9:22 AM, Lew Phelps K6LMP wrote: > I'm thinking of ordering a KCR2 Band Decoder from Aptos. > > I'm trying to figure out how it could be configured to control antenna > selection based on mode of operation. My station has Yagi beams for UHF/VHF > weak signal work, and also verticals for FM and repeater use. I know I can > get the KCR2 set up to select the appropriate relay readout for a given band, > but I can't see a way to automate the process of selecting between the two > available antenna on (for example) 2 meters. > > Obviously I can do this with a manual switch setup. Any way to automate it so > that I won't forget to change antennas when I switch from SSB to FM? > > Thanks, > > Lew K6LMP > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 Question
>> I'm trying to figure out how it could be configured to control >> antenna selection based on mode of operation. My station has Yagi >> beams for UHF/VHF weak signal work, and also verticals for FM and >> repeater use. I know I can get the KCR2 set up to select the >> appropriate relay readout for a given band, but I can't see a way >> to automate the process of selecting between the two available >> antenna on (for example) 2 meters. As you have probably heard by now, the KRC2 does not directly decode 2 meters (I don't believe it decodes above 30 MHz except as XVTR bands - but that may be 54 MHz) and certainly does not decode within any band. As far as I know, the only band decoder currently available that will decode within a band is the microHAM Station Master. As long as the CAT interface provides the correct RF frequency (e.g., IF +/- LO), Station Master can be configured to decode "band" based on that frequency. For example, this would allow one to define 144.0-144.5 and 144.5-148 MHz "bands" and select the yagis for 144.0-144.5 and a vertical elsewhere. Another use is selecting loading coils on an 80/75 meter antenna ... one might configure four or five separate "bands" depending on bandwidth and number of tap settings. 73, ... Joe Subich, W4TV microHAM America, LLC. http://www.microHAM-USA.com http://groups.yahoo.com/group/microHAM e-mail: i...@microham-usa.com On 1/23/2011 9:22 AM, Lew Phelps K6LMP wrote: > I'm thinking of ordering a KCR2 Band Decoder from Aptos. > > I'm trying to figure out how it could be configured to control antenna > selection based on mode of operation. My station has Yagi beams for UHF/VHF > weak signal work, and also verticals for FM and repeater use. I know I can > get the KCR2 set up to select the appropriate relay readout for a given band, > but I can't see a way to automate the process of selecting between the two > available antenna on (for example) 2 meters. > > Obviously I can do this with a manual switch setup. Any way to automate it so > that I won't forget to change antennas when I switch from SSB to FM? > > Thanks, > > Lew K6LMP > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 question
Joerg, The KRC2 can be configured to accept BCD data as input, but I see no reference that it provides BCD output. 73, Don W3FPR On 7/1/2013 8:05 AM, Jörg Rüschenschmidt wrote: Hi all, I have two devices which requires band data. 1.)Bandpass filter with 12 volt input lines per band 2.)Antenna switch which requires a BCD coded input for automatic switching My intention is to use KRC2 in serial mode. I understood from documentation BCD coded band data information will be available on J4 in serial mode. However I am not sure about this topic. My main interest is, could I use one KRC2 to support both devices at the same time ? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 question
I use the KRC2 as you describe (though I've got a highly modified bandmap and use it for driving my microwave rover station) .. I use the BCD output to drive my LO synthesizer and the discrete outputs to throw relays and stuff, works fine for me de w1rt/john On Mon, Jul 1, 2013 at 8:05 AM, Jörg Rüschenschmidt wrote: > Hi all, > > > > I have two devices which requires band data. > > > > 1.)Bandpass filter with 12 volt input lines per band > > 2.)Antenna switch which requires a BCD coded input for automatic > switching > > > > My intention is to use KRC2 in serial mode. I understood from documentation > BCD coded band data information will be available on J4 in serial mode. > However I am not sure about this topic. My main interest is, could I use > one KRC2 to support both devices at the same time ? > > > > 73 de Joerg (DL3QQ) > > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 question
Don, The manual says (on page 25 of rev C): "The remaining four drivers, labeled A, B, C and D, are TTL-compatible inputs or outputs depending on the operating mode. In normal KRC2 or analog modes, the terminals are outputs. In digital parallel input mode, they become inputs, and receive the BCD-encoded band data." It doesn't specify that the output format is BCD, but I can't imagine what else it would be... 73, ~iain / N6ML On Mon, Jul 1, 2013 at 5:24 AM, Don Wilhelm wrote: > Joerg, > > The KRC2 can be configured to accept BCD data as input, but I see no > reference that it provides BCD output. > > 73, > Don W3FPR > > > On 7/1/2013 8:05 AM, Jörg Rüschenschmidt wrote: >> >> Hi all, >> >> I have two devices which requires band data. >> >> >> 1.)Bandpass filter with 12 volt input lines per band >> >> 2.)Antenna switch which requires a BCD coded input for automatic >> switching >> >> >> My intention is to use KRC2 in serial mode. I understood from >> documentation >> BCD coded band data information will be available on J4 in serial mode. >> However I am not sure about this topic. My main interest is, could I use >> one KRC2 to support both devices at the same time ? >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KRC2 question
The output of the BCD pins is indeed TTL level, with coding as described in the KRC2 manual. If the BPFs need BCD input at +12 volts, probably the best way to do this would be to configure four output pins to output the desired BCD code for each band using the KRC2 Configuration Tool. I believe Fred described this in an email he posted here a short time ago. Be careful with driving a device from the BCD pins - if the device has pull-up resistors to +12 volts it could damage the KRC2's microcontroller. These signals have series 390 ohm resistors to provide the only protection to the MCU pins. They may not be adequate to prevent high voltage from damaging the chip. The BCD pins act as inputs only when the KRC2 jumpers are configured for BCD in. Otherwise the pins are outputs, reflecting the currently selected band. As noted above, the coding is described in the KRC2 manual. It is NOT identical to a the K3 coding, with the difference being the 60m and 6m band codes. (60m = 0x0A, 6m = 0x0B, with 0x00 undefined). Now, for the important question, if I understand correctly, the answer is yes. The KRC2 should be able to drive both devices, taking its band input from the radio using the Auxbus, or serial lines. In fact this configuration is used by many folks. Jack Brindle, W6FB Sent from my iPad On Jul 1, 2013, at 7:51 AM, iain macdonnell - N6ML wrote: > Don, > > The manual says (on page 25 of rev C): > > "The remaining four drivers, labeled A, B, C and D, are TTL-compatible > inputs or outputs depending on the operating mode. In normal KRC2 or > analog modes, the terminals are outputs. In digital parallel input > mode, they become inputs, and receive the BCD-encoded band data." > > It doesn't specify that the output format is BCD, but I can't imagine > what else it would be... > > 73, > >~iain / N6ML > > > On Mon, Jul 1, 2013 at 5:24 AM, Don Wilhelm wrote: >> Joerg, >> >> The KRC2 can be configured to accept BCD data as input, but I see no >> reference that it provides BCD output. >> >> 73, >> Don W3FPR >> >> >> On 7/1/2013 8:05 AM, Jörg Rüschenschmidt wrote: >>> >>> Hi all, >>> >>> I have two devices which requires band data. >>> >>> >>> 1.)Bandpass filter with 12 volt input lines per band >>> >>> 2.)Antenna switch which requires a BCD coded input for automatic >>> switching >>> >>> >>> My intention is to use KRC2 in serial mode. I understood from >>> documentation >>> BCD coded band data information will be available on J4 in serial mode. >>> However I am not sure about this topic. My main interest is, could I use >>> one KRC2 to support both devices at the same time ? >> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
