Re: [Elecraft] Using A 6 Meter LNA & Amplifier with the K3S
Hi John, The acc cable is used to convey the control signal from the sequencer to the K3 so that the TX INH will inhibit the K3 when configured correctly and can be used whether or not the band is built in or not. It may be possible to use the ALC output from the sequencer dependent upon its level and polarity but I do not know how that is configured. If you read the section in the manual that describes the inhibit and compare it with the sequencer output you should be able to arrange it correctly. 73 Peter G3SMT On 23/09/2018 22:03, John Stengrevics wrote: Hi Peter, I appreciate what you are saying, but I have no use for an ACC cable. The K3S has 6 meters built in. I am using the W6PQL amp with the control board. But, the control board has to connect to ALC on the transceiver. The K3S has no ALC jack. I have asked Jim, W6PQL, if setting the TX DELAY to 20 milliseconds will provide enough time for relays to switch. 73, John WA1EAZ On Sep 23, 2018, at 5:58 PM, Peter Torry wrote: Hi John, Pin 7 of the Acc connector is the transmit inhibit input that is enabled in the config menu. That is the only way to ensure that the K3 remains in Rx until the sequencer has completed its cycle. I use this with all my transverters and LNAs to ensure their correct sequencing. It is described in both the manual and the F Caddy book. As you are using the PQL amplifier I assume that you are also using the PQL control board V6 that has an output that may be used for this purpose, just check the polarity of the output as it may need inverting. Good luck with your project 73 Peter G3SMT On 23/09/2018 19:54, John Stengrevics wrote: Hi Peter, Thanks for the reply. But, what would I be using an ACC cable for? 73, John WA1EAZ On Sep 23, 2018, at 3:41 PM, Peter Torry wrote: Hi John, I agree with Don's comments as I use a K3 with an amplifier and an LNA in a similar configuration to yourself. I would never use ALC under any circumstances to avoid radiating a poor signal. To protect the LNA I use a signal from the sequencer in the amplifier to inhibit the K3 from transmitting until the sequencer has done its stuff. Setting the delay on the K3 still leaves you at risk as 20ms is too short a time for all the relays to operate satisfactorily. Use pin7 on the acc connector as detailed in the manual on transverter control - TX INH. 73 Peter G3SMT On 23/09/2018 15:29, John Stengrevics wrote: Hi Don, That was timely as I just got off Skype with Jim, W6PQL. He mentioned that the ALC should be held high for some milliseconds to allow for the amp’s relays to switch over thereby protecting the LNA. Since the K3S works differently than most, he suggested that I look for an RF Hold-Off setting on the K3S and set it for around 50 milliseconds. That being said, I don’t see that in the manual or in Fred’s book. Any suggestions? 73, John WA1EAZ On Sep 23, 2018, at 11:12 AM, Don Wilhelm wrote: John, I do not understand how the amplifier or the ALC could protect the LNA. I assume the LNA is only used on receive, so if you have good sequencing between receive and transmit, no damage could occur. ALC is only applicable to transmit, and Elecraft does not recommend using ALC to limit the drive to the amplifier. Set the power to the amp properly and all will be well. Using ALC to control the exciter power is a bad way to do things, it will only lead to distortion and spurious emissions from the amplifier. 73, Don W3FPR On 9/23/2018 10:58 AM, John Stengrevics wrote: My apologies - I should have added that I am using a Downeast Microwave DTR relay to take the LNA out of the line when voltage applied to the relay drops as a result of transmission. __ 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 peter.to...@talktalk.net __ 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] Fwd: Re: Using A 6 Meter LNA & Amplifier with the K3S
Hi John, Pin 7 of the Acc connector is the transmit inhibit input that is enabled in the config menu. That is the only way to ensure that the K3 remains in Rx until the sequencer has completed its cycle. I use this with all my transverters and LNAs to ensure their correct sequencing. It is described in both the manual and the F Caddy book. As you are using the PQL amplifier I assume that you are also using the PQL control board V6 that has an output that may be used for this purpose, just check the polarity of the output as it may need inverting. Good luck with your project 73 Peter G3SMT On 23/09/2018 19:54, John Stengrevics wrote: Hi Peter, Thanks for the reply. But, what would I be using an ACC cable for? 73, John WA1EAZ On Sep 23, 2018, at 3:41 PM, Peter Torry wrote: Hi John, I agree with Don's comments as I use a K3 with an amplifier and an LNA in a similar configuration to yourself. I would never use ALC under any circumstances to avoid radiating a poor signal. To protect the LNA I use a signal from the sequencer in the amplifier to inhibit the K3 from transmitting until the sequencer has done its stuff. Setting the delay on the K3 still leaves you at risk as 20ms is too short a time for all the relays to operate satisfactorily. Use pin7 on the acc connector as detailed in the manual on transverter control - TX INH. 73 Peter G3SMT On 23/09/2018 15:29, John Stengrevics wrote: Hi Don, That was timely as I just got off Skype with Jim, W6PQL. He mentioned that the ALC should be held high for some milliseconds to allow for the amp’s relays to switch over thereby protecting the LNA. Since the K3S works differently than most, he suggested that I look for an RF Hold-Off setting on the K3S and set it for around 50 milliseconds. That being said, I don’t see that in the manual or in Fred’s book. Any suggestions? 73, John WA1EAZ On Sep 23, 2018, at 11:12 AM, Don Wilhelm wrote: John, I do not understand how the amplifier or the ALC could protect the LNA. I assume the LNA is only used on receive, so if you have good sequencing between receive and transmit, no damage could occur. ALC is only applicable to transmit, and Elecraft does not recommend using ALC to limit the drive to the amplifier. Set the power to the amp properly and all will be well. Using ALC to control the exciter power is a bad way to do things, it will only lead to distortion and spurious emissions from the amplifier. 73, Don W3FPR On 9/23/2018 10:58 AM, John Stengrevics wrote: My apologies - I should have added that I am using a Downeast Microwave DTR relay to take the LNA out of the line when voltage applied to the relay drops as a result of transmission. __ 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 peter.to...@talktalk.net __ 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] Proposed: more 6 meter CW beacons
May I raise a word of caution and suggest that you carefully consider the frequency of any beacon in view of the international use of the band. 50.000-50.030 MHz reserved for a Synchronised Beacon Project *Region-1: *50.000-50.010; *Region-2: *50.010-50.020; *Region-3: *50.020-50.030 General beacons have migrated to 50.4-50.5 MHz, to create more space for Telegraphy and the new Synchronised Beacon Project. Perhaps a word with regular users of the band may be a useful way forward. 73 Peter G3SMT On Jul 1, 2018, at 7:32 AM, Wayne Burdick wrote: When 6 meters opens up, a few low-power CW beacons I’ve never heard always pop up in the low end of the band. We could use a lot more of these during sporadic-E seasons. If you have a 6-meter-capable QRP rig gathering dust and an antenna to put it on, you might consider joining in. In addition to giving us a few more data points on propagation, it’s a novel way of promoting CW use. If you decide to put a beacon on the air, please let us know so we can all listen for it. 73, Wayne N6KR __ 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 wun...@wunderwood.org __ 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 d...@nk7z.net __ 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 peter.to...@talktalk.net __ 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] 2 meter Linear and ALC with K3
Hi Alan, I would strongly recommend that you do NOT use ALC for any form of control signal or drive limiting. For control use the inhibit on the acc connector and for power output use the K3 pwr control. Look forward to hearing you on 2m. 73 Peter G3SMT On 04/03/2018 21:04, G4GNX wrote: I'm about to build a linear amplifier for 2 meters and the design I've chosen sends a negative voltage to the driving rig's ALC line to inhibit RF input, whilst the linear goes through a TX sequence. In view of the way that ALC is used differently with the K3S and KPA500, does the use of ALC in this way seem feasible for use with the K144XV transverter? Has anybody done this? 73, Alan. G4GNX __ 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 peter.to...@talktalk.net __ 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] Adding a low noise preamp into the receive line of the internal 2M trnsverter
Howard, Adding an internal preamp is not a trivial task as it would mean some surgery on the transverter board. What makes you think that you need a preamp? The sensitivity of the transverter is more than adequate for all normal use and any spare funds should be put into new low loss feeder and better antennas. If when all that is up and running you still require more sensitivity then a mast head preamp is the only way but caution is raised over using one of high gain as it is a balancing act between sensitivity and strong signal handling. Good luck with improving your system. 73 Peter G3SMT On 24/02/2018 12:42, Howard Sherer wrote: Is there an easy way to add a pre amp into the receive line on the internal K3 2M transverter? Howard Sherer AE3T __ 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 peter.to...@talktalk.net __ 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] FS K2/100
K2/100 for sale S/ No 4144 with DSP,NB,SSB, 160m etc. full details available please contact off list. 73 Peter G3SMT __ 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
