Re: [Elecraft] K3S relay noise when using Rx ANT IN port
I would cease operating with the RX antenna connected immediately before you damage your transceiver. 10m antenna separation is very close. I has a similar situation at my P40A station so I shorted the RX coax with a relay during transmit. GL, John KK9A M1FJL wrote: My K3S is configured to use the RX ANT IN port for a separate Rx antenna. However, on SSB transmissions I can hear an internal relay operating in synchronism with peaks in transmit power. I assume this is a relay in the receiver input protection circuit? Is operation of the relay in this manner normal? Apart from finding the noise rather irritating I am concerned about the reliability of the relay when it is called upon to operate so many times during a QSO. The Tx and Rx antennas are about 10 metres apart and I am transmitting 100 Watts. Thanks for your help, Ray M1FJL __ 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] Elecraft CW Net Announcement
Good Evening, Our latest sunspot is passing over the limb of the sun. Hopefully it will soon be replaced by more of them. We are moving out of a minor stream of solar wind. Maybe that means 20 meters will be more quiet. The days have gotten noticeably longer which is effecting the forty meter net. Currently the sun sets during the net so propagation changes rapidly. I do take calls before the net, I just don't CQ for them then. QRP and slower ops try me then too. I'm normally getting settled in by about 7 minutes to the hour. There will also be some competition for attention due to a game in Florida. This will show me where your priorities lie ;) Please join us tomorrow on: 14050 kHz at 2200z Sunday (2 PM PST Sunday) 7047 kHz at z Monday (4 PM PST Sunday) 73, Kevin. KD5ONS - And when all the programs on all the channels actually were made by actors with cleft-palettes, speaking lines by dyslexic writers, filmed by blind cameramen, instead of merely seeming like that, it somehow made the whole thing more worthwhile. - HHGTTG Fit the 11th January 24, 1980 __ 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] K3S relay noise when using Rx ANT IN port
This is what I use. https://www.dxengineering.com/search/product-line/dx-engineering-receiver-guard-electronic-rf-limiters?autoview=SKU&sortby=Default&sortorder=Default DX Engineering Receiver Guard Electronic RF Limiter. No relay involved. K3LR designed these for his contest station. If Tim is using these in his contest station, it should be more than adequate. 73, Mark, WB9CIF -Original Message- From: elecraft-boun...@mailman.qth.net On Behalf Of Bob McGraw K4TAX Sent: Sunday, February 2, 2020 01:16 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3S relay noise when using Rx ANT IN port I use a surplus coax relay, one with BNC connectors, and it is triggered from the KEY OUT function on the transceiver along with the 12V source. Be sure and use a diode across the relay coil to prevent back EMF. The relay switches the RX ANT port to a 50 load, being a resistor mounted in a BNC connector on the N.O contact port. The common relay port goes to the radio RX ANT IN and the N.C. relay port goes to the transceiver RX antenna. It only clicks when the PTT is active and released.As to CW, well that's another issue where the relay needs to be held in during transmission or you'll hear it with every CW element. I personally would be concerned about using solid state switching devices in as much as a junction when saturated may be prone to produce harmonic related energy. However, there are circuits which use PIN diodes or JFETS, designed correctly, would likely be clean. 73 Bob, K4TAX On 2/1/2020 4:48 PM, Don Wilhelm wrote: > Ray, > > Your transmit signal is getting into your RX antenna with more energy > than is safe for the K3S. 10 meters is not much separation unless the > antennas are oriented so one is not in the null pattern of the other. > > Using antennas that are of opposite polarization (such as a horizontal > dipole and a vertical) may be OK for a 10 meter separation, maybe not. > > There are protective devices available that will disconnect the RX > antenna when the K3S is transmitting, and use of one of those may be > the quickest and easiest solution. > > 73, > Don W3FPR > > On 2/1/2020 5:21 PM, raycollins wrote: >> >> My K3S is configured to use the RX ANT IN port for a separate Rx >> antenna. >> However, on SSB transmissions I can hear an internal relay operating in >> synchronism with peaks in transmit power. I assume this is a relay >> in the >> receiver input protection circuit? >> >> Is operation of the relay in this manner normal? Apart from finding the >> noise rather irritating I am concerned about the reliability of the >> relay >> when it is called upon to operate so many times during a QSO. >> >> The Tx and Rx antennas are about 10 metres apart and I am >> transmitting 100 >> Watts. >> > __ > 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 rmcg...@blomand.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 markmus...@sbcglobal.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] K3S relay noise when using Rx ANT IN port
I use a surplus coax relay, one with BNC connectors, and it is triggered from the KEY OUT function on the transceiver along with the 12V source. Be sure and use a diode across the relay coil to prevent back EMF. The relay switches the RX ANT port to a 50 load, being a resistor mounted in a BNC connector on the N.O contact port. The common relay port goes to the radio RX ANT IN and the N.C. relay port goes to the transceiver RX antenna. It only clicks when the PTT is active and released. As to CW, well that's another issue where the relay needs to be held in during transmission or you'll hear it with every CW element. I personally would be concerned about using solid state switching devices in as much as a junction when saturated may be prone to produce harmonic related energy. However, there are circuits which use PIN diodes or JFETS, designed correctly, would likely be clean. 73 Bob, K4TAX On 2/1/2020 4:48 PM, Don Wilhelm wrote: Ray, Your transmit signal is getting into your RX antenna with more energy than is safe for the K3S. 10 meters is not much separation unless the antennas are oriented so one is not in the null pattern of the other. Using antennas that are of opposite polarization (such as a horizontal dipole and a vertical) may be OK for a 10 meter separation, maybe not. There are protective devices available that will disconnect the RX antenna when the K3S is transmitting, and use of one of those may be the quickest and easiest solution. 73, Don W3FPR On 2/1/2020 5:21 PM, raycollins wrote: My K3S is configured to use the RX ANT IN port for a separate Rx antenna. However, on SSB transmissions I can hear an internal relay operating in synchronism with peaks in transmit power. I assume this is a relay in the receiver input protection circuit? Is operation of the relay in this manner normal? Apart from finding the noise rather irritating I am concerned about the reliability of the relay when it is called upon to operate so many times during a QSO. The Tx and Rx antennas are about 10 metres apart and I am transmitting 100 Watts. __ 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 rmcg...@blomand.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] K3S relay noise when using Rx ANT IN port
Ray, Your transmit signal is getting into your RX antenna with more energy than is safe for the K3S. 10 meters is not much separation unless the antennas are oriented so one is not in the null pattern of the other. Using antennas that are of opposite polarization (such as a horizontal dipole and a vertical) may be OK for a 10 meter separation, maybe not. There are protective devices available that will disconnect the RX antenna when the K3S is transmitting, and use of one of those may be the quickest and easiest solution. 73, Don W3FPR On 2/1/2020 5:21 PM, raycollins wrote: My K3S is configured to use the RX ANT IN port for a separate Rx antenna. However, on SSB transmissions I can hear an internal relay operating in synchronism with peaks in transmit power. I assume this is a relay in the receiver input protection circuit? Is operation of the relay in this manner normal? Apart from finding the noise rather irritating I am concerned about the reliability of the relay when it is called upon to operate so many times during a QSO. The Tx and Rx antennas are about 10 metres apart and I am transmitting 100 Watts. __ 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] K3S relay noise when using Rx ANT IN port
Ray That is indeed the protective relay on the RX Ant port. You should find a way to protect the RX Ant port from your TX signal. There are many products in the market for his purpose. Not sure of the best choice on your side of the Atlantic. 73 jim ab3cv On Sat, Feb 1, 2020 at 5:23 PM raycollins wrote: > > My K3S is configured to use the RX ANT IN port for a separate Rx antenna. > However, on SSB transmissions I can hear an internal relay operating in > synchronism with peaks in transmit power. I assume this is a relay in the > receiver input protection circuit? > > Is operation of the relay in this manner normal? Apart from finding the > noise rather irritating I am concerned about the reliability of the relay > when it is called upon to operate so many times during a QSO. > > The Tx and Rx antennas are about 10 metres apart and I am transmitting 100 > Watts. > > Thanks for your help, > > Ray M1FJL > > > > -- > Sent from: http://elecraft.365791.n2.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 > Message delivered to j...@jtmiller.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
[Elecraft] K3S relay noise when using Rx ANT IN port
My K3S is configured to use the RX ANT IN port for a separate Rx antenna. However, on SSB transmissions I can hear an internal relay operating in synchronism with peaks in transmit power. I assume this is a relay in the receiver input protection circuit? Is operation of the relay in this manner normal? Apart from finding the noise rather irritating I am concerned about the reliability of the relay when it is called upon to operate so many times during a QSO. The Tx and Rx antennas are about 10 metres apart and I am transmitting 100 Watts. Thanks for your help, Ray M1FJL -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
[Elecraft] K3 for sale
Hi folks, I have the following goodies for sale. This radio has made thousands of DX contacts, but I am assured that it still has many more left in it. K3/100-F Serial number 4905 KAT3-FATU KBPF3 General Coverage RX Module KFL3A-400 400 Hz, 8 pole filter (also contains standard 2.8 filter) KRX3-F2nd RX KUSB Univ. Ser Bus Adapt. ProSet Heil Boom Headset KXV3A RX Ant, IF Out & Xvrtr Int plus an LP-PAN, which allows you to run NaP3 and/or CW Skimmer $1950, I pay shipping in US 48 states. Sorry, I set previous message unsigned. 73, Tony KT0NY __ 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] KPA500 for sale
Hi again everybody, I also have a KPA500, serial number 0121, for sale. Both it and the K3 are in like-new condition, non-smoking home, no scratches or anything else. $1700 I pay shipping in US 48 states. 73, Tony KT0NY __ 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 for sale
Hi folks, I have the following goodies for sale. This radio has made thousands of DX contacts, but I am assured that it still has many more left in it. K3/100-F Serial number 4905 KAT3-FATU KBPF3 General Coverage RX Module KFL3A-400 400 Hz, 8 pole filter (also contains standard 2.8 filter) KRX3-F2nd RX KUSB Univ. Ser Bus Adapt. ProSet Heil Boom Headset KXV3A RX Ant, IF Out & Xvrtr Int plus an LP-PAN, which allows you to run NaP3 and/or CW Skimmer $1950, I pay shipping in US 48 states. __ 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] There is a new release of Win4K3Suite available
Hello, There is a new version of Win4K3Suite available, version 2.018. This release improves the entity lookup from ClubLog as well as other minor items. You must download this before the end of February. Win4K3Suite is a full featured control program for the K3/S, KX3 and KX2. It has a built in Panadapter that works with LPPAN and a sound card, as well as the SDRPlay RSP's. It supports the KAT500, KPA500/1500 and the KXPA100 on most of the above radios. A unique feature is that is has 6 built in Virtual Radios, each of which works just like an Elecraft radio. This allows sharing of a single COM port with up to 6 applications. It also has a built in HRDLogbook server and the EiBi Shortwave database. You see more information here: https://www.youtube.com/results?search_query=win4k3suite and download a fully functional 30 day trial at va2fsq.com 73 Tom va2fsq.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] February..?
2.7375 volts P-P Bob, K4TAX Sent from my iPhone > On Feb 1, 2020, at 9:03 AM, Dick Dickinson wrote: > > Test. > > > > > > Kind regards, > > Dick - KA5KKT > > __ > 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 rmcg...@blomand.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] February..?
Test. Kind regards, Dick - KA5KKT __ 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
