[Elecraft] K3 PTT with DEMI Transverters
To: All that responded. Thanks to all of you that responded to my request for information. Much useful information was received (simple to complex schematics) from many respondents for auto switching PTT and TXin / TXout lines to many Xvtrs. I intend to proceed with one of the simpler circuits at this time, but will keep the other schematics on file in case I add more Xvtrs later. Again thank you for all of your very useful comments and information. 73, Ken - W8KEN __ 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] K3 PTT with DEMI Transverters
Guess I can't attach a pic so here's a URL to it http://www.ah6le.net/k3_key.jpg Ken At 07:46 AM 7/18/2016, Ken Arck wrote: Hi Ken I too use a DEMI xvtr and used the following circuit to exploit the K3's capability to set a logic bit on the ACC connector based on band Ken At 09:33 PM 7/17/2016, Ken Kontor via Elecraft wrote: Gentlemen, I am looking for a circuit that one of you K3 users may have designed to automatically switch the K3 PTT line between multible external transverters as the K3 is switched from band to band. I presently use the K3 PTT line to key my 6m amp driven with 30 w from my K3. I recently purchased a DEMI 2m HP transverter to drive my 2m 3CX800 amp. The DEMI puts out 50 w with 1 mw of drive from the K3. The problem I have is when I key the DEMI Transverter from Pin 10 on the K3 15 Pin accessory socket, the K3 PTT out on the back of the K3 also Keys my 6m Amp even though the K3 is set to 2m. I need a circuit that will decode the BCD output from the K3 15 Pin connector to key the 6m Amp when I am on 6m and automatically switch the PTT line to the DEMI Transverter when I am on 2m. A manual switch would be very inconvenient for VHF contesting as one need to quickly QSY between bands with one station for multiple points. Also in the future I might add a 432 Transverter and would like to auto switch the PTT for it also. I would only require three outputs as I would only switch between 6m, 2m and 70 cm. I am a Mechanical Engineer with limited Electrical knowledge. I did build a K2 and can breadboard stuff from a schematic and parts list, but I am not a circuit designer and have no knowledge of digital logic stuff other than I know it exists. I am in need of a designed and tested circuit that is know to work reliably. Given the circuit diagram and a parts list I could then reproduce it. Your help is greatly appreciated. Thank you in advance for any information you can provide. 73, Ken - W8KEN PS: you may contact me off line at w8...@yahoo.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 k...@arcomcontrollers.com -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net "We don't just make 'em. We use 'em!" __ 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 k...@arcomcontrollers.com -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net "We don't just make 'em. We use 'em!" __ 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] K3 PTT with DEMI Transverters
Hi Ken I too use a DEMI xvtr and used the following circuit to exploit the K3's capability to set a logic bit on the ACC connector based on band Ken At 09:33 PM 7/17/2016, Ken Kontor via Elecraft wrote: Gentlemen, I am looking for a circuit that one of you K3 users may have designed to automatically switch the K3 PTT line between multible external transverters as the K3 is switched from band to band. I presently use the K3 PTT line to key my 6m amp driven with 30 w from my K3. I recently purchased a DEMI 2m HP transverter to drive my 2m 3CX800 amp. The DEMI puts out 50 w with 1 mw of drive from the K3. The problem I have is when I key the DEMI Transverter from Pin 10 on the K3 15 Pin accessory socket, the K3 PTT out on the back of the K3 also Keys my 6m Amp even though the K3 is set to 2m. I need a circuit that will decode the BCD output from the K3 15 Pin connector to key the 6m Amp when I am on 6m and automatically switch the PTT line to the DEMI Transverter when I am on 2m. A manual switch would be very inconvenient for VHF contesting as one need to quickly QSY between bands with one station for multiple points. Also in the future I might add a 432 Transverter and would like to auto switch the PTT for it also. I would only require three outputs as I would only switch between 6m, 2m and 70 cm. I am a Mechanical Engineer with limited Electrical knowledge. I did build a K2 and can breadboard stuff from a schematic and parts list, but I am not a circuit designer and have no knowledge of digital logic stuff other than I know it exists. I am in need of a designed and tested circuit that is know to work reliably. Given the circuit diagram and a parts list I could then reproduce it. Your help is greatly appreciated. Thank you in advance for any information you can provide. 73, Ken - W8KEN PS: you may contact me off line at w8...@yahoo.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 k...@arcomcontrollers.com -- President and CTO - Arcom Communications Makers of repeater controllers and accessories. http://www.arcomcontrollers.com/ Authorized Dealers for Kenwood and Telewave and we offer complete repeater packages! AH6LE/R - IRLP Node 3000 http://www.irlp.net "We don't just make 'em. We use 'em!" __ 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] K3 PTT with DEMI Transverters
Gentlemen, I am looking for a circuit that one of you K3 users may have designed to automatically switch the K3 PTT line between multible external transverters as the K3 is switched from band to band. I presently use the K3 PTT line to key my 6m amp driven with 30 w from my K3. I recently purchased a DEMI 2m HP transverter to drive my 2m 3CX800 amp. The DEMI puts out 50 w with 1 mw of drive from the K3. The problem I have is when I key the DEMI Transverter from Pin 10 on the K3 15 Pin accessory socket, the K3 PTT out on the back of the K3 also Keys my 6m Amp even though the K3 is set to 2m. I need a circuit that will decode the BCD output from the K3 15 Pin connector to key the 6m Amp when I am on 6m and automatically switch the PTT line to the DEMI Transverter when I am on 2m. A manual switch would be very inconvenient for VHF contesting as one need to quickly QSY between bands with one station for multiple points. Also in the future I might add a 432 Transverter and would like to auto switch the PTT for it also. I would only require three outputs as I would only switch between 6m, 2m and 70 cm. I am a Mechanical Engineer with limited Electrical knowledge. I did build a K2 and can breadboard stuff from a schematic and parts list, but I am not a circuit designer and have no knowledge of digital logic stuff other than I know it exists. I am in need of a designed and tested circuit that is know to work reliably. Given the circuit diagram and a parts list I could then reproduce it. Your help is greatly appreciated. Thank you in advance for any information you can provide. 73, Ken - W8KEN PS: you may contact me off line at w8...@yahoo.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
