Re: [Elecraft] K2 Line Out Mods
I have revised the original file - https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/edit?usp=sharing And I added a couple layouts for anyone wanting to make a series of these on a 6x9 sheet of copper clad - 2 files(front and back) - https://drive.google.com/file/d/0B_D41ceK5uSqRUNIeUZ4eGs4cUU/edit?usp=sharing https://drive.google.com/file/d/0B_D41ceK5uSqeHJ0YXd4YXh4Z1U/edit?usp=sharing - 73 - Sean On Jan 29, 2014, at 6:29 PM, Kevin Crossett kcross...@gmail.com wrote: Hi Sean. I am looking forward to seeing the revised layout. I did something similar several months ago, but my layout skills using pcbexpress were not nearly as clean and sharp as your board. In the end, my transfer method using an clothes iron left a lot to be desired. I also wasted a lot of copper clad board working on the design. Not having an electronics background did not help the situation either. Don helped me figure out a few things I was doing wrong. Nonetheless, I continued trudging forward, and managed to learn something in the process. Since that first experience with board construction, I purchased a laminator off Amazon that works great. I have a board ready to use for a xtal test fixture from Chuck Adam's, K7QO lab notebook, but I have not had time to build it yet ... too many other projects ahead of it, including a great transmitter from GQRP that uses a similar construction technique as the xtal fixture (muppet or limerick construction depending on who is speaking). That rig is on the bench now, and as soon as I can get into the workshop, I plan to start making some solder smoke. On Wed, Jan 29, 2014 at 3:37 PM, s...@seanmichaeljohnston.com s...@seanmichaeljohnston.com wrote: Dhoh! I'll post up a revised version with the OUT label corrected. Thanks for letting me know. It's good to know that it works. - Sean On Jan 29, 2014, at 1:21 PM, Kevin Crossett kcross...@gmail.com wrote: I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I’m a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of
Re: [Elecraft] K2 Line Out Mods
I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I'm a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS's layout as a printable pdf ( https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/ edit?usp=sharing), and am thinking I'll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR's great instructions (http://www2.opparc.org/ mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I'm building a legacy product here, but from the activity I've seen on this mailing list, it's definitely not dead yet. __ 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] K2 Line Out Mods
The ground is not needed on the audio output line. If there was to be one it would be connected to chassis ground, and that circuit already has a chassis ground connection. An Elecraft-wired mic won't use pin 5, so it's safe to leave the audio out connected to pin 5 of the header. 73, Dennis NJ6G On 1/29/2014 11:21 AM, Kevin Crossett wrote: Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... __ 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] K2 Line Out Mods
Dhoh! I'll post up a revised version with the OUT label corrected. Thanks for letting me know. It's good to know that it works. - Sean On Jan 29, 2014, at 1:21 PM, Kevin Crossett kcross...@gmail.com wrote: I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I’m a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS’s layout as a printable pdf (https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/edit?usp=sharing), and am thinking I’ll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR’s great instructions (http://www2.opparc.org/mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I’m building a legacy product here, but from the activity I’ve seen on this mailing list, it’s definitely not dead yet. __ 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
Re: [Elecraft] K2 Line Out Mods
Kevin, With the Elecraft pinout, pin 5 is defined as FUNC - which was never implemented in the K2, so that is the choice for use as an unused mic pin. Caution, there is circuitry connected to the FUNC input, so that must remain isolated - in other words, if there is a jumper from FUNC to 5 on the microphone configuration header, it must be removed. You can connect the audio out wire to the pin marked 5, and only that pin. On the ground situation, the proximity of the Control Panel Ground and the Front Panel ground is such that a direct ground connection is not necessary - at least it works that way in my K2. If I wire to the rear panel, I will run a wire for the AF as well as the ground - that also works well. 73, Don W3FPR On 1/29/2014 2:21 PM, Kevin Crossett wrote: I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I'm a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS's layout as a printable pdf ( https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/ edit?usp=sharing), and am thinking I'll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR's great instructions (http://www2.opparc.org/ mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I'm building a legacy product here, but from the activity I've seen on this mailing list, it's definitely not dead yet. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help:
Re: [Elecraft] K2 Line Out Mods
Thanks for the advice everyone. Sean. I have only made the board. I have not soldered anything to it yet, but it does look like the traces are correct. The last time I did something with the audio out board, I messed up somewhere and messed up the alignment on the radio. No worries though, Don got me back on the air in no time. Hopefully his services won't be necessary this time around. On Jan 29, 2014, at 15:37, s...@seanmichaeljohnston.com s...@seanmichaeljohnston.com wrote: Dhoh! I'll post up a revised version with the OUT label corrected. Thanks for letting me know. It's good to know that it works. - Sean On Jan 29, 2014, at 1:21 PM, Kevin Crossett kcross...@gmail.com wrote: I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I’m a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS’s layout as a printable pdf (https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/edit?usp=sharing), and am thinking I’ll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR’s great instructions (http://www2.opparc.org/mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I’m building a legacy product here, but from the activity I’ve seen on this mailing list, it’s definitely not dead yet. __ Elecraft mailing list Home:
Re: [Elecraft] K2 Line Out Mods
Hi Sean. I am looking forward to seeing the revised layout. I did something similar several months ago, but my layout skills using pcbexpress were not nearly as clean and sharp as your board. In the end, my transfer method using an clothes iron left a lot to be desired. I also wasted a lot of copper clad board working on the design. Not having an electronics background did not help the situation either. Don helped me figure out a few things I was doing wrong. Nonetheless, I continued trudging forward, and managed to learn something in the process. Since that first experience with board construction, I purchased a laminator off Amazon that works great. I have a board ready to use for a xtal test fixture from Chuck Adam's, K7QO lab notebook, but I have not had time to build it yet ... too many other projects ahead of it, including a great transmitter from GQRP that uses a similar construction technique as the xtal fixture (muppet or limerick construction depending on who is speaking). That rig is on the bench now, and as soon as I can get into the workshop, I plan to start making some solder smoke. On Wed, Jan 29, 2014 at 3:37 PM, s...@seanmichaeljohnston.com s...@seanmichaeljohnston.com wrote: Dhoh! I'll post up a revised version with the OUT label corrected. Thanks for letting me know. It's good to know that it works. - Sean On Jan 29, 2014, at 1:21 PM, Kevin Crossett kcross...@gmail.com wrote: I have been messing about with this board for a while, but have not had success hooking it up the rig yet. I downloaded the schematic that Sean produced ... nice job ... and made up a board using the laser toner method described by K7QO. I did see one small issue with the board. The OUT label is actually labeled GND ... a minor oversight. Otherwise the board looks FB. Two questions about using pin 5 from the microphone header ... Is the ground from the audio out board still used? If so, where does it connect? Also, while I don't use a mic (CW only at this point), if I attach the audio out to pin 5, can I still plug in an Elecraft-wired mic without unplugging the audio out connector from the header? Thanks for any insight... Kevin KK4LSG On Mon, Jan 27, 2014 at 6:51 PM, Don Wilhelm w3...@embarqmail.com wrote: Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I'm a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS's layout as a printable pdf ( https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/ edit?usp=sharing), and am thinking I'll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR's great instructions
[Elecraft] K2 Line Out Mods
Hello All. I’m a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS’s layout as a printable pdf (https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/edit?usp=sharing), and am thinking I’ll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR’s great instructions (http://www2.opparc.org/mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I’m building a legacy product here, but from the activity I’ve seen on this mailing list, it’s definitely not dead yet. Thanks - Sean (working on the call sign) __ 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] K2 Line Out Mods
Sean, The circuit is simple enough to build on perfboard if you don't want to go to the trouble of making a board. If you do make boards, you might want to consider making additional board and offering them for sale. There are occasional requests for those boards. Build the version which lays the components flat on the board and attach it to the back of the Control Board. That way everything except the audio output is on the Control Board making the Control Board easy to remove for servicing - plus it fits easily when the KPA100 is installed. For the output connection, yes an unused microphone pin is an ideal place (for the Elecraft microphones, use pin 5). Use a wire that is an adequate length to allow the Control Board to be removed sufficiently that you can reach the microphone configuration header on the back of the Front Panel. You can solder the audio output wire to one of the 'computer' type jumpers that will plug right into the microphone configuration header - make certain the 'jumper' is plugged only into the side that is closest to the microphone jack. The only difference between Pauli's (SK) AF take off point and the one I used is that Pauli's is prior to the muting transistors in the K2 and my points are after the muting transistors. If you prefer that the AF not be muted during TX, then you can still attach to the back of the Control Board at the rear of CB J2 pins 1 and 2 - and is quite independent of the KDSP2 (or KAF2) option. I might add that Pauli did buy one of my boards - I asked him Why since he had a wonderful interface already, and he replied that my Fixed Audio Output board was an easy and simple solution. Good luck on getting that license. 73, Don W3FPR On 1/27/2014 6:08 PM, Sean Michael Johnston wrote: Hello All. I’m a newbie here and about to embark on building a K2. One of the many uses I have planned for the radio is to send emails over Winlink 2000 while at sea on a sailboat. I'd like to communicate with the SignaLink USB sound card through Winmor first and then eventually with a PACTOR 3 or 4 modem. I was thinking of building the fixed audio out designed by W3FPR NØSS. My plan is to fabricate a pcb using the laser printer transfer method. I have recreated NØSS’s layout as a printable pdf (https://drive.google.com/file/d/0B_D41ceK5uSqM3VGa05BWXBhYkE/edit?usp=sharing), and am thinking I’ll run the line out to pin 5 of the 8-pin mic connection so I can have a single cable between the K2 and the SignaLink. My question is where is the best point in the K2 to source the AF inputs from? Is it cleaner to tap into the control board as is illustrated by W3FPR’s great instructions (http://www2.opparc.org/mirrors/n0ss/www.n0ss.net/w3fpr_fixed_af_output_for_the_k2_v2r1.pdf), or would it be a better signal if I tap into the KDSP2 board as recommended by EA3BLQ (http://www.qsl.net/ea3blq/downloads/k2di-pci_const_manual.pdf) for his Sound Card Interface? And is this the best way to get a line out from the K2, or has there been any newer advancements along those lines? I realize that I’m building a legacy product here, but from the activity I’ve seen on this mailing list, it’s definitely not dead yet. __ 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
