[Elecraft] DIGOUT1 DVR PTT OUT
Hi fellows, I am dealing with and issue related to the Interlocking 2 K3 for our next CQWW Adventure in D4C. The main problems, that i am encountering are the follow : I have builded, a footswitch interlock, between two K3, and easy 2 relay Xcrossed switch, both FSwitch avoid that the other one TX the proper K3, and i have added a logic for enable the INH of the proper inactive Radio. Everything work as expect, even when u use the internal K3 DVR, where u don't have a separate PTT line from the DVR that can be used to acknowledge that the DVR has been asserted and that can be as the FSwitch to interlock the secondary Radio. The only way to know that the DVR is ON is to use the K3 PPT OUT, but i need to interlock first that the radio TX not after . The DVR memory are played within macro developed in WintTest, so i am thinking to use the DIGOUT1 as DVR PTT, using proper command MN19 in the DVR macro, allowing, trough a PNP BJT and a Relay to simulate a Fswitch press, that can be connected to my interlock board. I had look at for any unofficial DIGOUT1 application other then switch on the PR6, but no luck Any suggestion or advise ? Thank's in advance .. 73 de Fabio I4UFH on of D4C __ 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] Digout1?
I ended up stripping down the network of wiring to just the Elecraft supplied cable the PR6 and the KAT500. It still pulled the PR6 line active. I then wised up and consulted the PR6 schematic and figured out the problem. The PR6 is a 12V only device with a transistor interface to activate the relays and provide power to the FET stage. The KAT500 is a 5V device. So any connection to the KAT500 even through the 4.99K resistor is to a lower voltage point, either 5v or gnd. The result is the KAT500 will often be capable of drawing enough current from the PR6 interface to turn on the relatively high gain 2N3906 and activate the PR6 as a result. BTW, the KAT500 can draw this sufficient current whether or not it has power connected (power supply lead physically removed). The solution is to not rely on the KAT500 being innocuous and just disabling the KPA500 menu item for INHIBIT. The solution is to physically break the PIN11 connection from the K3 which I plan to do by taking another pin out of the supplied Key Line Interrupter. jim On Sat, Aug 10, 2013 at 9:42 AM, Dick Dievendorff wrote: > KAT500 firmware initializes the INHIBIT (pin 11 of the ACC connector, pin > 16 > of the microcontroller, PORTF bit 4), as a hi-Z input (the TRIS bit is 1 > for > 1nput), never changes the TRIS bit, and doesn't ever reference the value of > the input port bit. > > As I read the schematic, even if the KAT500 configured the pin as output > and > pulled that low, there would be a 4.99K series resistance. It's perhaps > intended as an input to the KAT500, but it's not used in firmware. > > I don't know what I could change in firmware to have less effect on the > INHIBIT line. > > The KAT500 instead interrupts the amplifier key line to "inhibit" the > amplifier, which works with more amplifiers than the KPA500. > > However physical testing trumps design intent... > > Dick, K6KR > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Cady, Fred > Sent: Friday, August 09, 2013 20:25 PM > To: 'Jim Miller'; 'Elecraft Reflector' > Subject: Re: [Elecraft] Digout1? > > Hi Jim, > The schematic I have doesn't show the pin 11 inhibit pulled low in the > KAT500. It goes to the microcontroller through a series 4.99K resistor. > But what it is used for in the KAT500 is an interesting question. > > Back to your original question, I have the K3-KAT-KPA set up and use > Digout1 > to switch the PR6. I'd have to check more closely but I don't think the KPA > or KAT is pulling pin-11 low all the time. > > Cheers, > Fred > > > Fred Cady > fcady at ieee dot org > > > -Original Message- > > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > > boun...@mailman.qth.net] On Behalf Of Jim Miller > > Sent: Friday, August 09, 2013 6:18 PM > > To: Elecraft Reflector > > Subject: Re: [Elecraft] Digout1? > > > > I found a thread on this reflector that mentions the PIN11 problem. It > > was from April of this year and I had forgotten it. I'll just break > > another pin off in the Key Line Interrupter to solve the problem. > > > > Another mystery however is why the INHIBIT line is there in the first > > place. Its operation isn't described in the KAT500 and the KAT500 has > > it permanently pulled low. Note that the KAT500 document calls it > > INHIBIT (inferring a positive active polarity) while the KPA500 > > document calls it INHIBIT# (inferring active low polarity.) Since I > > have the INHIBIT IN disabled via the KPA500 menu nothing is happening > > here anyway between them. > > > > In neither document is the purpose described. Note that this is not > > the PTT > > (PIN10) which is well documented and working fine for me. > > > > Still not clear either why the KAT500 would have this line pulled low. > > According to the KAT500 schematics PIN11 is passed through and only > > sensed by the microcontroller via a 4.99K/0.1uf network. The cable > > when disconnected from the KAT500 but still connected to the K3/PR6 > > doesn't interfere with the DIGOUT1 function. Only when the KAT500 is > > connected. > > BTW, for this test the cable going to the KPA500 is not present so > > neither the cable or the KPA500 can be contributing. > > > > Looks like it's time to open the KAT500F. > > > > jim > > > > > > > > > > On Fri, Aug 9, 2013 at 3:32 PM, Jim Miller wrote: > > > > > I've got the K3/KAT500/KPA500 all chained together with the Elecraft > > DB15 > > > accessory cables. > > &
Re: [Elecraft] Digout1?
KAT500 firmware initializes the INHIBIT (pin 11 of the ACC connector, pin 16 of the microcontroller, PORTF bit 4), as a hi-Z input (the TRIS bit is 1 for 1nput), never changes the TRIS bit, and doesn't ever reference the value of the input port bit. As I read the schematic, even if the KAT500 configured the pin as output and pulled that low, there would be a 4.99K series resistance. It's perhaps intended as an input to the KAT500, but it's not used in firmware. I don't know what I could change in firmware to have less effect on the INHIBIT line. The KAT500 instead interrupts the amplifier key line to "inhibit" the amplifier, which works with more amplifiers than the KPA500. However physical testing trumps design intent... Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Cady, Fred Sent: Friday, August 09, 2013 20:25 PM To: 'Jim Miller'; 'Elecraft Reflector' Subject: Re: [Elecraft] Digout1? Hi Jim, The schematic I have doesn't show the pin 11 inhibit pulled low in the KAT500. It goes to the microcontroller through a series 4.99K resistor. But what it is used for in the KAT500 is an interesting question. Back to your original question, I have the K3-KAT-KPA set up and use Digout1 to switch the PR6. I'd have to check more closely but I don't think the KPA or KAT is pulling pin-11 low all the time. Cheers, Fred Fred Cady fcady at ieee dot org > -Original Message- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of Jim Miller > Sent: Friday, August 09, 2013 6:18 PM > To: Elecraft Reflector > Subject: Re: [Elecraft] Digout1? > > I found a thread on this reflector that mentions the PIN11 problem. It > was from April of this year and I had forgotten it. I'll just break > another pin off in the Key Line Interrupter to solve the problem. > > Another mystery however is why the INHIBIT line is there in the first > place. Its operation isn't described in the KAT500 and the KAT500 has > it permanently pulled low. Note that the KAT500 document calls it > INHIBIT (inferring a positive active polarity) while the KPA500 > document calls it INHIBIT# (inferring active low polarity.) Since I > have the INHIBIT IN disabled via the KPA500 menu nothing is happening > here anyway between them. > > In neither document is the purpose described. Note that this is not > the PTT > (PIN10) which is well documented and working fine for me. > > Still not clear either why the KAT500 would have this line pulled low. > According to the KAT500 schematics PIN11 is passed through and only > sensed by the microcontroller via a 4.99K/0.1uf network. The cable > when disconnected from the KAT500 but still connected to the K3/PR6 > doesn't interfere with the DIGOUT1 function. Only when the KAT500 is > connected. > BTW, for this test the cable going to the KPA500 is not present so > neither the cable or the KPA500 can be contributing. > > Looks like it's time to open the KAT500F. > > jim > > > > > On Fri, Aug 9, 2013 at 3:32 PM, Jim Miller wrote: > > > I've got the K3/KAT500/KPA500 all chained together with the Elecraft > DB15 > > accessory cables. > > > > I'm now in the process of connecting up the PR6/DIGOUT1 enabling > line. > > > > I've removed the jumper in the PR6 and connected the control signal > to the > > PR6 to DIGOUT1 and all works well; switching the CONFIG: DIGOUT1 > > menu > entry > > causes the relays in the PR6 to switch audibly. > > > > However when I connect up the DB15 chain to the KAT500 the DIGOUT1 > line is > > permanently pulled low. > > > > Referring to the cable diagram and the KAT500/KPA500 connector > callouts it > > appears the KAT500/KPA500 use the same PIN11 as DIGOUT1 for an > INHIBIT# > > function. > > > > I disconnected the KPA500 from the chain and the KAT500 appears to > > be pulling this line low all the time. > > > > Do I need to remove PIN11 from the cable as well? I already have the > > Keyline interrupter installed which has PIN10 removed. > > > > Confused... > > > > jim ab3cv > > > > > > > __ > 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 __ Elecr
Re: [Elecraft] Digout1?
Hi Jim, The schematic I have doesn't show the pin 11 inhibit pulled low in the KAT500. It goes to the microcontroller through a series 4.99K resistor. But what it is used for in the KAT500 is an interesting question. Back to your original question, I have the K3-KAT-KPA set up and use Digout1 to switch the PR6. I'd have to check more closely but I don't think the KPA or KAT is pulling pin-11 low all the time. Cheers, Fred Fred Cady fcady at ieee dot org > -Original Message- > From: elecraft-boun...@mailman.qth.net [mailto:elecraft- > boun...@mailman.qth.net] On Behalf Of Jim Miller > Sent: Friday, August 09, 2013 6:18 PM > To: Elecraft Reflector > Subject: Re: [Elecraft] Digout1? > > I found a thread on this reflector that mentions the PIN11 problem. It > was > from April of this year and I had forgotten it. I'll just break another > pin > off in the Key Line Interrupter to solve the problem. > > Another mystery however is why the INHIBIT line is there in the first > place. Its operation isn't described in the KAT500 and the KAT500 has > it > permanently pulled low. Note that the KAT500 document calls it INHIBIT > (inferring a positive active polarity) while the KPA500 document calls > it > INHIBIT# (inferring active low polarity.) Since I have the INHIBIT IN > disabled via the KPA500 menu nothing is happening here anyway between > them. > > In neither document is the purpose described. Note that this is not the > PTT > (PIN10) which is well documented and working fine for me. > > Still not clear either why the KAT500 would have this line pulled low. > According to the KAT500 schematics PIN11 is passed through and only > sensed > by the microcontroller via a 4.99K/0.1uf network. The cable when > disconnected from the KAT500 but still connected to the K3/PR6 doesn't > interfere with the DIGOUT1 function. Only when the KAT500 is connected. > BTW, for this test the cable going to the KPA500 is not present so > neither > the cable or the KPA500 can be contributing. > > Looks like it's time to open the KAT500F. > > jim > > > > > On Fri, Aug 9, 2013 at 3:32 PM, Jim Miller wrote: > > > I've got the K3/KAT500/KPA500 all chained together with the Elecraft > DB15 > > accessory cables. > > > > I'm now in the process of connecting up the PR6/DIGOUT1 enabling > line. > > > > I've removed the jumper in the PR6 and connected the control signal > to the > > PR6 to DIGOUT1 and all works well; switching the CONFIG: DIGOUT1 menu > entry > > causes the relays in the PR6 to switch audibly. > > > > However when I connect up the DB15 chain to the KAT500 the DIGOUT1 > line is > > permanently pulled low. > > > > Referring to the cable diagram and the KAT500/KPA500 connector > callouts it > > appears the KAT500/KPA500 use the same PIN11 as DIGOUT1 for an > INHIBIT# > > function. > > > > I disconnected the KPA500 from the chain and the KAT500 appears to be > > pulling this line low all the time. > > > > Do I need to remove PIN11 from the cable as well? I already have the > > Keyline interrupter installed which has PIN10 removed. > > > > Confused... > > > > jim ab3cv > > > > > > > __ > 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] Digout1?
I found a thread on this reflector that mentions the PIN11 problem. It was from April of this year and I had forgotten it. I'll just break another pin off in the Key Line Interrupter to solve the problem. Another mystery however is why the INHIBIT line is there in the first place. Its operation isn't described in the KAT500 and the KAT500 has it permanently pulled low. Note that the KAT500 document calls it INHIBIT (inferring a positive active polarity) while the KPA500 document calls it INHIBIT# (inferring active low polarity.) Since I have the INHIBIT IN disabled via the KPA500 menu nothing is happening here anyway between them. In neither document is the purpose described. Note that this is not the PTT (PIN10) which is well documented and working fine for me. Still not clear either why the KAT500 would have this line pulled low. According to the KAT500 schematics PIN11 is passed through and only sensed by the microcontroller via a 4.99K/0.1uf network. The cable when disconnected from the KAT500 but still connected to the K3/PR6 doesn't interfere with the DIGOUT1 function. Only when the KAT500 is connected. BTW, for this test the cable going to the KPA500 is not present so neither the cable or the KPA500 can be contributing. Looks like it's time to open the KAT500F. jim On Fri, Aug 9, 2013 at 3:32 PM, Jim Miller wrote: > I've got the K3/KAT500/KPA500 all chained together with the Elecraft DB15 > accessory cables. > > I'm now in the process of connecting up the PR6/DIGOUT1 enabling line. > > I've removed the jumper in the PR6 and connected the control signal to the > PR6 to DIGOUT1 and all works well; switching the CONFIG: DIGOUT1 menu entry > causes the relays in the PR6 to switch audibly. > > However when I connect up the DB15 chain to the KAT500 the DIGOUT1 line is > permanently pulled low. > > Referring to the cable diagram and the KAT500/KPA500 connector callouts it > appears the KAT500/KPA500 use the same PIN11 as DIGOUT1 for an INHIBIT# > function. > > I disconnected the KPA500 from the chain and the KAT500 appears to be > pulling this line low all the time. > > Do I need to remove PIN11 from the cable as well? I already have the > Keyline interrupter installed which has PIN10 removed. > > Confused... > > jim ab3cv > > > __ 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] Digout1?
I've got the K3/KAT500/KPA500 all chained together with the Elecraft DB15 accessory cables. I'm now in the process of connecting up the PR6/DIGOUT1 enabling line. I've removed the jumper in the PR6 and connected the control signal to the PR6 to DIGOUT1 and all works well; switching the CONFIG: DIGOUT1 menu entry causes the relays in the PR6 to switch audibly. However when I connect up the DB15 chain to the KAT500 the DIGOUT1 line is permanently pulled low. Referring to the cable diagram and the KAT500/KPA500 connector callouts it appears the KAT500/KPA500 use the same PIN11 as DIGOUT1 for an INHIBIT# function. I disconnected the KPA500 from the chain and the KAT500 appears to be pulling this line low all the time. Do I need to remove PIN11 from the cable as well? I already have the Keyline interrupter installed which has PIN10 removed. Confused... jim ab3cv __ 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] DIGOUT1
Can I use DIGOUT1 ( pin 11 ACC connector) to key an external 2 meter amp ( ground on transmit) connected to ANT 3. When I PTT I want to key the 2 meter amp without keying the 160-10 amp connected to ANT1. Thank you K6CG __ 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] DIGOUT1 to switch K3's key out to two separate amps based on band (HF or 6m)
OK all, Tom again caught a problem with my description. The cathode of the diode goes to the end of the relay coil where the + voltage connects and the *anode* connects to the other end of the relay and the drain of the 2N7000. Thanks for catching that Tom. He sent a private note to me, and I gave him permission to post it on the reflector, but being the gentleman he is, he did not see fit to do that. Anyway, now if someone tries to duplicate that circuit, you know the proper way to connect the diode. 73, Don W3FPR Don Wilhelm wrote: > Jon and all, > > Tom W8JI caught a problem in my circuit description. The diode across > the transistor will do nothing. Put the diode across the relay coil. > The cathode still goes to the end where the drain connects. > > 73, > Don W3FPR > -- > > > Jon, > > I would use a 2N7000. The circuit could be quite easy - a 10k resistor > from +12 volts (K3 +12 volts out will do fine) - the source goes to > ground - the drain connects to the relay coil. I would strongly > recommend a diode (1N400x) between the drain and ground (cathode toward > the drain). The other side of the relay connects to a voltage source > that matches the relay coil rating (I would suggest a 12 volt relay just > because it is easier). > > If you use a SPDT relay, you can connect the common to the K3 KEYOUT and > the NO and NC contacts each go to their own amplifier. > > Set CONFIG menu DIGIOUT1 to OFF for all bands and antennas that you want > the relay to be activated, and to ON for all bands and antennas that you > do *not* activate the relay. There are no "don't care" settings. > > Because of the lack of "don't care" states, you may be better off > decoding 6 meters from the band data outputs - a logical AND of BAND3 > and BAND1 will do because those two bits will only be active for 6 > meters (You don't have to set things correctly for the other bands). > Follow a NAND with an inverter (another two input NAND with both inputs > tied together) and that drives the 2N7000 - omit the resistor from the > gate to +12 volts if you do it that way, the drain and source > connections to the 2N7000 are unchanged. A single CD4011 will do with 2 > gates left over and will operate on a 12 volt supply. > > 73, > Don W3FPR > > 73, > Don W3FPR > > W7VH wrote: >> I'd like to use DIGOUT1 >> to switch the K3's key out between two amps based on band >> (HF and 6m). I'm not that technical and am not used to designing >> little transistor switching circuits and wondered if you can give >> me some info on how to do it. I guess I'd need a transistor that >> would switch based on the DIGOUT1 voltage and could handle the >> power needed to switch a reed relay to key the separate amps. >> >> If you have any info that could help, I'd appreciate it. >> >> Thanks, >> >> Jon >> > > __ 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] DIGOUT1 to switch K3's key out to two separate amps based on band (HF or 6m)
Jon and all, Tom W8JI caught a problem in my circuit description. The diode across the transistor will do nothing. Put the diode across the relay coil. The cathode still goes to the end where the drain connects. 73, Don W3FPR -- Jon, I would use a 2N7000. The circuit could be quite easy - a 10k resistor from +12 volts (K3 +12 volts out will do fine) - the source goes to ground - the drain connects to the relay coil. I would strongly recommend a diode (1N400x) between the drain and ground (cathode toward the drain). The other side of the relay connects to a voltage source that matches the relay coil rating (I would suggest a 12 volt relay just because it is easier). If you use a SPDT relay, you can connect the common to the K3 KEYOUT and the NO and NC contacts each go to their own amplifier. Set CONFIG menu DIGIOUT1 to OFF for all bands and antennas that you want the relay to be activated, and to ON for all bands and antennas that you do *not* activate the relay. There are no "don't care" settings. Because of the lack of "don't care" states, you may be better off decoding 6 meters from the band data outputs - a logical AND of BAND3 and BAND1 will do because those two bits will only be active for 6 meters (You don't have to set things correctly for the other bands). Follow a NAND with an inverter (another two input NAND with both inputs tied together) and that drives the 2N7000 - omit the resistor from the gate to +12 volts if you do it that way, the drain and source connections to the 2N7000 are unchanged. A single CD4011 will do with 2 gates left over and will operate on a 12 volt supply. 73, Don W3FPR 73, Don W3FPR W7VH wrote: > I'd like to use DIGOUT1 > to switch the K3's key out between two amps based on band > (HF and 6m). I'm not that technical and am not used to designing > little transistor switching circuits and wondered if you can give > me some info on how to do it. I guess I'd need a transistor that > would switch based on the DIGOUT1 voltage and could handle the > power needed to switch a reed relay to key the separate amps. > > If you have any info that could help, I'd appreciate it. > > Thanks, > > Jon > __ 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] DIGOUT1 to switch K3's key out to two separate amps based on band (HF or 6m)
Jon, I would use a 2N7000. The circuit could be quite easy - a 10k resistor from +12 volts (K3 +12 volts out will do fine) - the source goes to ground - the drain connects to the relay coil. I would strongly recommend a diode (1N400x) between the drain and ground (cathode toward the drain). The other side of the relay connects to a voltage source that matches the relay coil rating (I would suggest a 12 volt relay just because it is easier). If you use a SPDT relay, you can connect the common to the K3 KEYOUT and the NO and NC contacts each go to their own amplifier. Set CONFIG menu DIGIOUT1 to OFF for all bands and antennas that you want the relay to be activated, and to ON for all bands and antennas that you do *not* activate the relay. There are no "don't care" settings. Because of the lack of "don't care" states, you may be better off decoding 6 meters from the band data outputs - a logical AND of BAND3 and BAND1 will do because those two bits will only be active for 6 meters (You don't have to set things correctly for the other bands). Follow a NAND with an inverter (another two input NAND with both inputs tied together) and that drives the 2N7000 - omit the resistor from the gate to +12 volts if you do it that way, the drain and source connections to the 2N7000 are unchanged. A single CD4011 will do with 2 gates left over and will operate on a 12 volt supply. 73, Don W3FPR 73, Don W3FPR W7VH wrote: > I'd like to use DIGOUT1 > to switch the K3's key out between two amps based on band > (HF and 6m). I'm not that technical and am not used to designing > little transistor switching circuits and wondered if you can give > me some info on how to do it. I guess I'd need a transistor that > would switch based on the DIGOUT1 voltage and could handle the > power needed to switch a reed relay to key the separate amps. > > If you have any info that could help, I'd appreciate it. > > Thanks, > > Jon > __ 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] DIGOUT1 to switch K3's key out to two separate amps based on band (HF or 6m)
I'd like to use DIGOUT1 to switch the K3's key out between two amps based on band (HF and 6m). I'm not that technical and am not used to designing little transistor switching circuits and wondered if you can give me some info on how to do it. I guess I'd need a transistor that would switch based on the DIGOUT1 voltage and could handle the power needed to switch a reed relay to key the separate amps. If you have any info that could help, I'd appreciate it. Thanks, Jon -- View this message in context: http://elecraft.365791.n2.nabble.com/DIGOUT1-to-switch-K3-s-key-out-to-two-separate-amps-based-on-band-HF-or-6m-tp5346270p5346270.html Sent from the Elecraft mailing list archive at Nabble.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
[Elecraft] DIGOUT1
For anyone with a k3 who needs to activate something based on the band in use, I recommend you take a look at using the DIGOUT1 connection on pin 11 of the accessory output. It can be programmed in the menu to turn on or off based on the band and antenna in use. I just built a coax switch that switches between my Steppir and my auto tuner. On 20 meters up it turns on the coax switch and connects my Alpha to the Steppir. On 30 meters and below it turns off and lets the switch default to the auto tuner which handles all my wire antennas. I use a transistor switch keyed by pin 11 to a low 220 ohms to key the vacuum relay which switches the antennas. Works great. Might also be useful to someone using remote operation. Thanks to Wayne at Elecraft for his help and advice. Van W4GIW __ 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] DIGOUT1
On Jun 10, 2009, at 3:18 PM, van fair wrote: > Wayne I am building a coax relay to be activated using the DIGOUT1 > contacts. I want the contacts to ground the base of a PNP transistor > TIP 42 through a series 800 ohm resistor. > > I now have a cable for the 15 pin plug with connections to pin 5 and > 11. When DIGOUT1 is turned to ON on 20 meters I get a 220 ohm > resistance between pin 11 and 5. I expected to get a short between > them and to ground. Will this 220 ohm resistance in series with the > 800 resistor in my switch be capable of causing the transistor to > swamp causing the emitter and cathode to connect and go to ground to > enable the 12 volt relay coil. Hi Van, The 220-ohm resistor is in series with the open-drain control line to ground on the KIO3. KIO3 outputs are protected with R-C filters. This will add to the 800 ohms, in practice, so you'll really have 1020 ohms to ground. My guess is that the PNP transistor will still do what you expect. You could drop the 800 ohm resistor to something smaller if necessary. 73, Wayne N6KR --- http://www.elecraft.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
[Elecraft] DIGOUT1
Wayne I am building a coax relay to be activated using the DIGOUT1 contacts. I want the contacts to ground the base of a PNP transistor TIP 42 through a series 800 ohm resistor. I now have a cable for the 15 pin plug with connections to pin 5 and 11. When DIGOUT1 is turned to ON on 20 meters I get a 220 ohm resistance between pin 11 and 5. I expected to get a short between them and to ground. Will this 220 ohm resistance in series with the 800 resistor in my switch be capable of causing the transistor to swamp causing the emitter and cathode to connect and go to ground to enable the 12 volt relay coil. Any idea why pin 11 does not go to ground and where the 220 ohms is coming from . Thanks Van W4GIW __ 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] digout1
Correct, Van. The default for DIGOUT1 is floating (high resistance), or OFF. If turned ON for a given band/antenna, it will provide a low-Z path to ground to control an external switch. You may need an additional series resistor depending on the switch type. Among other possibilities, DIGOUT1 could be used to turn on an external preamp (like our PR6) or do supplemental antenna switching. 73, Wayne N6KR On May 25, 2009, at 9:30 AM, van fair wrote: > Can anyone confirm that my understanding of DIGOUT1 is correct. I > think that when turned on for each band by going to the band setting > antenna to 1 or 2 and then turning it on or off, the following will be > true. > > When Off for any band pin 11 will not go to ground with pin 5 and > nothing will happen, When turned on for a band, when going to that > band pin 11 will go to ground with pin 5 thereby providing a switch > which can be used to cycle a transistor switch on and off depending on > band setting. Am I correct and if not what does happen. Thanks Van > W4GIW --- http://www.elecraft.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
[Elecraft] digout1
Can anyone confirm that my understanding of DIGOUT1 is correct. I think that when turned on for each band by going to the band setting antenna to 1 or 2 and then turning it on or off, the following will be true. When Off for any band pin 11 will not go to ground with pin 5 and nothing will happen, When turned on for a band, when going to that band pin 11 will go to ground with pin 5 thereby providing a switch which can be used to cycle a transistor switch on and off depending on band setting. Am I correct and if not what does happen. Thanks Van W4GIW __ 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
