[Elecraft] K3 Voltage on TX
Folks, I am not sure if I have some sort of issues or not. My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? I do not believe this is a K3 issue, but I was wondering if others see that much drop before I dig into my 12VDC supply system. Thanks Rich __ 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 Voltage on TX
On Mon,10/26/2015 8:48 AM, Rich wrote: My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? It's not good. Two possible reasons -- poor regulation of the power supply and IR drop in the power cable. How long is the power cable between the K3 and power supply? What wire gauge? Do the arithmetic for Ohm's law for the IR drop in that length of that wire gauge. and remember to use the length of the cable x2 (for two conductors). Resistance per ft for various wire gauges is in the ARRL Handbook. Put a voltmeter across the output terminals of the power supply and check the voltage. It's also possible that the power supply has poor regulation. 73, Jim K9YC __ 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 Voltage on TX
Rich, Yes, that is abnormal. Either your power supply is sagging or there is too much voltage drop in the power cable. To figure out which it is, measure the power supply voltage at its terminals during transmit. If it is staying "right up there" as it should, then the problem is in the cable. Check that the power supply terminals are tight, check that the fuseholders have good contact with the fuses (change the fuse(s) because they can develop a higher than normal resistance. Make certain that the APP connector on the K3 end of the cable has its contacts fully inserted - the tip of the connector blade should be latched over the spring finger below it. If you can see both the spring finger and the tip of the contact blade when you look from the front, the contact blade is not fully inserted. 73, Don W3FPR On 10/26/2015 11:48 AM, Rich wrote: Folks, I am not sure if I have some sort of issues or not. My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? I do not believe this is a K3 issue, but I was wondering if others see that much drop before I dig into my 12VDC supply system. Thanks Rich __ 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 w3...@embarqmail.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] K3 Voltage on TX
If the wire gauge is OK and the supply regulation is not at fault, give some attention to the connectors at each end of the cable, too. A drop of 2.8 Volts points to some sort of issue. 73, Phil W7OX On 10/26/15 9:02 AM, Jim Brown wrote: On Mon,10/26/2015 8:48 AM, Rich wrote: My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? It's not good. Two possible reasons -- poor regulation of the power supply and IR drop in the power cable. How long is the power cable between the K3 and power supply? What wire gauge? Do the arithmetic for Ohm's law for the IR drop in that length of that wire gauge. and remember to use the length of the cable x2 (for two conductors). Resistance per ft for various wire gauges is in the ARRL Handbook. Put a voltmeter across the output terminals of the power supply and check the voltage. It's also possible that the power supply has poor regulation. 73, Jim K9YC __ 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 Voltage on TX
Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the help rich On 10/26/2015 12:09 PM, Phil Wheeler wrote: If the wire gauge is OK and the supply regulation is not at fault, give some attention to the connectors at each end of the cable, too. A drop of 2.8 Volts points to some sort of issue. 73, Phil W7OX On 10/26/15 9:02 AM, Jim Brown wrote: On Mon,10/26/2015 8:48 AM, Rich wrote: My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? It's not good. Two possible reasons -- poor regulation of the power supply and IR drop in the power cable. How long is the power cable between the K3 and power supply? What wire gauge? Do the arithmetic for Ohm's law for the IR drop in that length of that wire gauge. and remember to use the length of the cable x2 (for two conductors). Resistance per ft for various wire gauges is in the ARRL Handbook. Put a voltmeter across the output terminals of the power supply and check the voltage. It's also possible that the power supply has poor regulation. 73, Jim K9YC __ 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 rwnewbo...@comcast.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] K3 Voltage on TX
That's way more drop than I experience with a 4S1P LiFePO4. Things to check: Length and gauge of wire [remember to double the length when calculating resistance, it's a round trip for the electrons]. Poor regulation in the power supply or depleted battery or battery at the end of useful life. Voltage drop at connectors Voltage drop at fuses. 73, Fred K6DGW - Northern California Contest Club - CU in the Cal QSO Party 1-2 Oct 2016 - www.cqp.org On 10/26/2015 8:48 AM, Rich wrote: I am not sure if I have some sort of issues or not. My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. Is that a normal drop? I do not believe this is a K3 issue, but I was wondering if others see that much drop before I dig into my 12VDC supply system. __ 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 Voltage on TX
That's still too much. Last time I measured my K3, the drop was 0.6 V on TX at 100W. Cartridge type [AGC] fuses and the holders are common culprits. I've replaced all of my fuses with the automotive fuses with the blade type contacts. They present a large contact area, are very tight, and have a large wipe as you insert and remove them. 73, Fred K6DGW - Northern California Contest Club - CU in the Cal QSO Party 1-2 Oct 2016 - www.cqp.org On 10/26/2015 10:05 AM, Rich wrote: Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. __ 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] KRC2 rs232 to cpu not working
Jack, (and others on the list) Thanks for the pointers. I was unable to get the rs-232 to the computer working. I have not tried the Aux-bus to the K3 yet. I think I will contact elecraft service and see if I can send it back for a look-see by them. I can not tell what it has for firmware or set the bandmap without the rs232. I had only the jumpers in for the RS-232 connection, and the serial cable is only wired up for rx, tx and gnd (pins 2,3 and 5). I tried all the baud rates, I did verify that the serial port and cable worked with my KPA-500 and W2 meter. Gordon - N1MGO On 10/22/2015 02:17 PM, Jack Brindle wrote: Gordon; When you get ready to test, send me an email. I will be around this weekend, although I plan on spending some time in CQ WW. One thing that is very critical. Using a straight-through RS-232 cable will put high voltage (12V) signals on the microcontroller and can damage it. I hope that isn’t the situation you are seeing. The microcontroller reads the W1-8 jumpers only at power-up, so after you change the jumpers you must power cycle the KRC2. You can reset the bandpass to factory default by holding the F4 button at power up. This requires the V1.6 firmware, which has been out for several years. There should be a sticker on the MCU that indicates the firmware it held when it left the factory, but that becomes invalid after the firmware is upgraded. At that point, the only real way to tell the difference is to query the MCU with the KRC2 Utility. When you try that utility, the DL/OP switch inside the KRC2 needs to be on the DL position. It should be in the OP position for normal use if you are using RS232 to communicate with the radio. Let me know when you get testing and I’ll help as much as I can. We really do want to get you going with your KRC2 as quickly as possible. 73, - Jack Brindle, W6FB Elecraft Engineering __ 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 KAT1 AUTOMATIC ANTENNA TUNER
Built and operate the Elecraft K1 transceiver S/N 1112. It has always functioned perfectly in the past, QRPDXCC etc. I had not used the K1 for sometime and recently tried to fire it up. The unit includes the KAT1 ATU. Have been trying to follow the KAT1 operating Instruction Assembly and Operating Instruction manual apparently to no avail. Obviously feel I am missing a step somewhere. Would be most appreciative to receive clear step-by-step tuning instructions, re tuning, loading, SWR etc. Thank you in advance for your assistance in this matter. Dick - W7MPZ -- View this message in context: http://elecraft.365791.n2.nabble.com/Elecraft-KAT1-AUTOMATIC-ANTENNA-TUNER-tp7609573.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Voltage on TX
Guess I'm more empirically than theoretically oriented, but my first act would be to touch and feel the cable and connectors after allowing the K3 to draw full current for a minute or two. Even 2 volts at 10 amps is 20 watts. That's enough to cause heating you should feel very quickly if it's concentrated at a connector, fuse holder damaged point in the cable. 73 Ron AC7AC __ 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 Voltage on TX
Hi Rich: A couple of more things. First do the math. Assuming 20 amps of transmit current (that's my rig @100 watts output) with a 2 volt drop is 40 watts of lost energy (not my rig). That also happens to be the power rating of my soldering iron. To point, something is likely to be getting warm. You should be able to find your problem by touching your cables and connectors while transmitting a 100 watts of RTTY, AM, etc. Also, I hope you are not using a diode type power sharing device sold to share power supply and battery. Think about it. Why do they need a big heat sink? Big heat sinks mean lots of wasted power. 73 Fred, AE6QL -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Rich Sent: Monday, October 26, 2015 10:05 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Voltage on TX Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the help rich On 10/26/2015 12:09 PM, Phil Wheeler wrote: > If the wire gauge is OK and the supply regulation is not at fault, > give some attention to the connectors at each end of the cable, too. A > drop of 2.8 Volts points to some sort of issue. > > 73, Phil W7OX > > On 10/26/15 9:02 AM, Jim Brown wrote: >> On Mon,10/26/2015 8:48 AM, Rich wrote: >>> My K3 shows 13.7VDC on RX. When I TX that reading drops to 10.9VDC. >>> Is that a normal drop? >> >> It's not good. Two possible reasons -- poor regulation of the power >> supply and IR drop in the power cable. >> >> How long is the power cable between the K3 and power supply? What >> wire gauge? Do the arithmetic for Ohm's law for the IR drop in that >> length of that wire gauge. and remember to use the length of the >> cable x2 (for two conductors). Resistance per ft for various wire >> gauges is in the ARRL Handbook. >> >> Put a voltmeter across the output terminals of the power supply and >> check the voltage. It's also possible that the power supply has poor >> regulation. >> >> 73, Jim K9YC > > __ > 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 > rwnewbo...@comcast.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 fptowns...@earthlink.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] Which hand-held PTT switch? OT
Hi, That is routinely tested by ARRL. From the K3/100 review in January 2009 QST: Receive-transmit turnaround time (tx delay): SSB, 12 ms; FM, 9 ms. Unit is Not specified. suitable for use on AMTOR. So it's probably the user. AB2TC - Knut David Cutter wrote > Sorry for the thread drift, but, has there ever been an investigation into > response time of hitting the PTT and beginning to speak? Occasionally I > hear the first syllable being lost and I've wondered if this is due to > time > delays in the equipment or the user, or both. Brings back memories of > bucket-brigade delay-lines. > > 73 > David > G3UNA > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: > Elecraft@.qth > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to > lists+1215531472858-365791@.nabble -- View this message in context: http://elecraft.365791.n2.nabble.com/Which-hand-held-PTT-switch-tp7609514p7609575.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Elecraft KAT1 AUTOMATIC ANTENNA TUNER
Dick, First make certain the ATU menu parameter is set to "tun". Then hold both the buttons in the upper right of the front panel together to initiate a TUNE. If the KAT1 already has a tuning solution in place, the process will go quickly and you may have to listen closely to hear relays click. When it has found a tuning solution, it will display the resulting SWR. Tap any button to exit the TUNE process. Once you have Tuned the KAT1 to a particular antenna on a band, when you return to that band it will switch to that tuning solution. So if you have done a TUNE on all bands, there is no need to re-tune unless you change antennas. 73, Don W3FPR On 10/26/2015 2:01 PM, Richard Fredrickson via Elecraft wrote: Built and operate the Elecraft K1 transceiver S/N 1112. It has always functioned perfectly in the past, QRPDXCC etc. I had not used the K1 for sometime and recently tried to fire it up. The unit includes the KAT1 ATU. Have been trying to follow the KAT1 operating Instruction Assembly and Operating Instruction manual apparently to no avail. Obviously feel I am missing a step somewhere. Would be most appreciative to receive clear step-by-step tuning instructions, re tuning, loading, SWR etc. Thank you in advance for your assistance in this matter. Dick - W7MPZ __ 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] Setting up K3s on Reverse Beacon
Are there easy step by step instructions on how to setup the K3s for running on Reverse Beacon? This will be my first introduction into digi modes. Thanks in advance, N1BBR -- bw...@fastmail.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] Accuracy of Wattmeter W2 under 2 Watt
Hello, Thanks for your suggestions. It seems that the owners of the W2 use it for higher power settings than qrpp. So it is natural that nobody could answer my questions. So I will continue to use my Pm2 http://www.foxdelta.com/products/pm2.htm . But in a private discussion I was pointed to a solution of the irritating numbers shown on the display. I have no cabinet and the cable from the RS232 was too long and not shielded. So there was some hf going direct into the circuits. So I will build a box and take some ferrits and hopefully will be happy. Thanks for the advice and your time. 73 de Hajo DL1SDZ Gruss Hajo --- Cela est bien dit, ...,mais il fault cultiver notre jardin. __ 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] Elecraft KAT1 AUTOMATIC ANTENNA TUNER
Don wrote: > When it has found a tuning solution, it will display the resulting SWR. > Tap any button to exit the TUNE process. It's worth noting that the K1 continues transmitting after the tuning is complete, until the TUNE process is manually exited. > ...if you have done a TUNE on all bands, there is no need to re-tune > unless you change antennas. I'll add the obvious "or you operate far enough from the last-tuned frequency while using a limited-bandwidth antenna." That happens easily if you have the 150 kHz (typically 170 kHz) VFO span option and a dipole on 40 meters. :-) Mike / KK5F __ 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 Voltage on TX
You don't happen to have anything else in line between the power supply and the K3 do you? I've found those DC distribution panels sold by certain companies are contributors to significant voltage drop. Your statement " With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX." is a clue that the way you have things configured is not optimum. In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up. My rule: the radio connects direct to the power supply. No exception. If you need DC for something else, connect it direct to the power supply as well. I also use a dedicated ground conductor between the radio and DC supply ground. The DC Negative is not considered to be adequate ground. 73 Bob, K4TAX K3S s/n 10163 On 10/26/2015 12:05 PM, Rich wrote: Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the help rich On 10/26/2015 12:09 PM, Phil Wheeler wrote: If the wire gauge is OK and the supply regulation is not at fault, give some attention to the connectors at each end of the cable, too. A drop of 2.8 Volts points to some sort of issue. 73, Phil W7OX __ 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 Voltage on TX
I just checked my radio. Receive shows 13.7 volts. At 100 watts CW key down transmit it shows 13.3 volts. The current indicated on the power supply is 18 amps. Power leads are about 2 ft in length being #10 stranded with connectors crimped and soldered at both ends. Also a #10 AWG ground is in place between the radio and power supply 73 Bob, K4TAX K3S s/n 10163 On 10/26/2015 2:37 PM, Bob McGraw - K4TAX wrote: You don't happen to have anything else in line between the power supply and the K3 do you? I've found those DC distribution panels sold by certain companies are contributors to significant voltage drop. Your statement " With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX." is a clue that the way you have things configured is not optimum. In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up. My rule: the radio connects direct to the power supply. No exception. If you need DC for something else, connect it direct to the power supply as well. I also use a dedicated ground conductor between the radio and DC supply ground. The DC Negative is not considered to be adequate ground. 73 Bob, K4TAX K3S s/n 10163 On 10/26/2015 12:05 PM, Rich wrote: Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the help rich __ 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 Voltage on TX
On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote: In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up. Yes. I've been told that the DC bus in popular DC distribution strips is quite small considering the rated current. They're fine for accessories that don't draw much current, but don't run your rig through them (unless it's QRP)! 73, Jim K9YC __ 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] Accuracy of Wattmeter W2 under 2 Watt
Hajo: A power meter based on the AD8307, such as the PM2 uses, can be very accurate and sensitive but requires calibration. The AD3807 takes RF in and produces a dc output proportional to the logarithm of the input signal amplitude. I have a homebrew version based on a design by W7ZOI that works FB down to below -90 dbM. That's the native sensitivity of the AD8307. You are quite right that shielding is needed otherwise any local source of RF can upset the readings. I presume the PM2 has an input attenuator but any RF getting to the AD8307 chip can cause errors. If you have a steady source of RF nearby (i.e. a broadcast station) it can introduce a fixed error in addition to the jigger you saw from the RS232 bus. That will depend upon how they have terminated the input to the AD8307. I suggested a solution that is not dependent upon specialized test equipment most Hams don't have handy or depending upon the manufacturer's calibration data. If that is not an issue, by all means the PM2 is suitable. 73 and have fun! Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Hajo Dezelski Sent: Monday, October 26, 2015 11:47 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt Hello, Thanks for your suggestions. It seems that the owners of the W2 use it for higher power settings than qrpp. So it is natural that nobody could answer my questions. So I will continue to use my Pm2 http://www.foxdelta.com/products/pm2.htm . But in a private discussion I was pointed to a solution of the irritating numbers shown on the display. I have no cabinet and the cable from the RS232 was too long and not shielded. So there was some hf going direct into the circuits. So I will build a box and take some ferrits and hopefully will be happy. Thanks for the advice and your time. 73 de Hajo DL1SDZ Gruss Hajo --- Cela est bien dit, ...,mais il fault cultiver notre jardin. __ 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] Accuracy of Wattmeter W2 under 2 Watt
Hi Ron, I bought the unit from a ham, who finds pleasure and has the equipment to calibrate. And he did it to the unit and the sensors. This is all documented and well done. So I could measure my wspr output of 500 uW were I reached the 1 Mio km per Watt goal. But I had the troubles described above, so although I hate tinkering I will change my profession and will become a box maker ;-) and will report ... after I have done my homework. 73 de Hajo Am 26.10.2015 8:52 nachm. schrieb "Ron D'Eau Claire" : > Hajo: > > A power meter based on the AD8307, such as the PM2 uses, can be very > accurate and sensitive but requires calibration. The AD3807 takes RF in and > produces a dc output proportional to the logarithm of the input signal > amplitude. > > I have a homebrew version based on a design by W7ZOI that works FB down to > below -90 dbM. That's the native sensitivity of the AD8307. You are quite > right that shielding is needed otherwise any local source of RF can upset > the readings. I presume the PM2 has an input attenuator but any RF getting > to the AD8307 chip can cause errors. If you have a steady source of RF > nearby (i.e. a broadcast station) it can introduce a fixed error in > addition > to the jigger you saw from the RS232 bus. That will depend upon how they > have terminated the input to the AD8307. > > I suggested a solution that is not dependent upon specialized test > equipment > most Hams don't have handy or depending upon the manufacturer's calibration > data. If that is not an issue, by all means the PM2 is suitable. > > 73 and have fun! > > Ron AC7AC > > > -Original Message- > From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Hajo > Dezelski > Sent: Monday, October 26, 2015 11:47 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt > > Hello, > > Thanks for your suggestions. It seems that the owners of the W2 use it for > higher power settings than qrpp. So it is natural that nobody could answer > my questions. > > So I will continue to use my Pm2 http://www.foxdelta.com/products/pm2.htm > . > But in a private discussion I was pointed to a solution of the irritating > numbers shown on the display. I have no cabinet and the cable from the > RS232 was too long and not shielded. So there was some hf going direct into > the circuits. So I will build a box and take some ferrits and hopefully > will > be happy. > > Thanks for the advice and your time. > > 73 de Hajo DL1SDZ > > Gruss > Hajo > > --- > Cela est bien dit, ...,mais il fault cultiver notre jardin. > > __ 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 Popping noise in headphones??
Thanks Jim. I used the Kenwood TS-480 when the rig was in the shop, and the audio was better, fewer pops and hiss, and the Noise Reduction was noticeably better on the Kenwood 480. Jim W6AIM . -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Brown Sent: Saturday, October 17, 2015 9:59 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Popping noise in headphones?? On Fri,10/16/2015 11:15 PM, Jim Bolit wrote: > The popping is present as I rotate the BW control back to wider bandwidths also, but the popping stops once above 200 Hz bandwidth. Hi Jim, I also do a lot of digging for weak signals, but I rarely go narrower than 200 Hz because I find the filter ringing on noise takes over. Yes, I'm using the optimal setting to minimize ringing. If you're hearing the popping and others are not, perhaps you're using more AF gain and less RF gain than they are. If so, I suggest adjusting that ratio in the direction of less AF gain and see if you can reach a happy compromise. As an OT CW op, I do recognize the virtue of not using excessive RF gain. And maybe Wayne can do something about the switching transient in a future firmware firmware release. 73, Jim K9YC __ 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 jbol...@outlook.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] K3 Voltage on TX
I gave up running my K3 through a RigRunner for just that reason. I put in a short lead directly to the battery bank APP junction strip and things got a lot better. They got even better with a N8XJK Boost Regulator between the K3 and the junction. (Tested with 100W into a dummy load.) 73 Bill AE6JV On 10/26/15 at 12:50 PM, j...@audiosystemsgroup.com (Jim Brown) wrote: On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote: In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up. Yes. I've been told that the DC bus in popular DC distribution strips is quite small considering the rated current. They're fine for accessories that don't draw much current, but don't run your rig through them (unless it's QRP)! --- Bill Frantz| If the site is supported by | Periwinkle (408)356-8506 | ads, you are the product.| 16345 Englewood Ave www.pwpconsult.com | | Los Gatos, CA 95032 __ 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 Voltage on TX
I was having too much drop with RR as well. I switched to a 1ft line directly to my Samlex 1235M which has been jacked to 14.4v no load. It only moves a few mV when loaded to 20A. IIRC, the cable is now AWG12. 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 Voltage on TX
Forgot to mention: the RR runs everything else that needs 14v. On Mon, Oct 26, 2015 at 5:08 PM, Jim Miller wrote: > I was having too much drop with RR as well. I switched to a 1ft line > directly to my Samlex 1235M which has been jacked to 14.4v no load. It only > moves a few mV when loaded to 20A. > > IIRC, the cable is now AWG12. > > 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Accuracy of Wattmeter W2 under 2 Watt
Silly me, I was just told, that I even have a newer version PMA3 http://www.foxdelta.com/products/pm3.htm It is sometimes a pain getting older. 73 de Hajo __ 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 Voltage on TX
Well my take.ANYTHING between the power source and radio has resistance, regardless of how small. Resistance with any amount of current equals voltage drop. Thus E = IR Where E is the voltage drop, I is the current and R is the resistance. I'm not sure what some of those thing are nor why they are needed but I do know least is best. As to operating from batteries, floating AGM batteries at 13.8 should not produce any voltage drop other than the resistance of the power cable.Of course a fuse or switch in line does have R so there goes the regulation as current changes. Nothing is better than a good regulated supply and hopefully one with remote voltage sensing. Of course those are more expensive and more of a challenge to install and then have operate correctly in the presence of a RF field. 73 Bob, K4TAX K3S s.n. 10163 On 10/26/2015 3:55 PM, Bill Frantz wrote: I gave up running my K3 through a RigRunner for just that reason. I put in a short lead directly to the battery bank APP junction strip and things got a lot better. They got even better with a N8XJK Boost Regulator between the K3 and the junction. (Tested with 100W into a dummy load.) 73 Bill AE6JV On 10/26/15 at 12:50 PM, j...@audiosystemsgroup.com (Jim Brown) wrote: On Mon,10/26/2015 12:37 PM, Bob McGraw - K4TAX wrote: In fact, anything in line between the power supply and radio can contribute to this. Even fuses, switches, power connectors and such. Any connection that is loose or terminal that is loose will be a voltage drop point. They just add up. Yes. I've been told that the DC bus in popular DC distribution strips is quite small considering the rated current. They're fine for accessories that don't draw much current, but don't run your rig through them (unless it's QRP)! __ 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] KSYN3A synthesizer question
I have an older K3 with a sub receiver that I am thinking of upgrading. This is a second radio that I use at my beach house. If I rarely use the sub receiver, can I just upgrade the main receiver board with one KSYN3A synthesizer or do I need to purchase two KSYN3A synthesizers? Irwin Darack - KD3TB __ 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 Voltage on TX
Perhaps it's vanity, but I like running my rig off solar power and batteries. Since I also take the rig out in the field somewhat frequently, battery power avoids noisy generators. (Besides, I own the panels and batteries, but don't own a generator.) In any case, floating batteries requires a power source during operations which doesn't work really well with solar power at night. The WVARA operation discovered during the last California QSO Party that tired batteries and K3s are a recipe for transmitter distortion and local interference in a multi-radio operation. The N8XJK Battery Booster is an attempt to get more life from tired batteries into the just before dawn hours. 73 Bill AE6JV On 10/26/15 at 2:18 PM, rmcg...@blomand.net (Bob McGraw - K4TAX) wrote: Well my take.ANYTHING between the power source and radio has resistance, regardless of how small. Resistance with any amount of current equals voltage drop. Thus E = IR Where E is the voltage drop, I is the current and R is the resistance. I'm not sure what some of those thing are nor why they are needed but I do know least is best. As to operating from batteries, floating AGM batteries at 13.8 should not produce any voltage drop other than the resistance of the power cable.Of course a fuse or switch in line does have R so there goes the regulation as current changes. Nothing is better than a good regulated supply and hopefully one with remote voltage sensing. Of course those are more expensive and more of a challenge to install and then have operate correctly in the presence of a RF field. 73 Bob, K4TAX K3S s.n. 10163 On 10/26/2015 3:55 PM, Bill Frantz wrote: I gave up running my K3 through a RigRunner for just that reason. I put in a short lead directly to the battery bank APP junction strip and things got a lot better. They got even better with a N8XJK Boost Regulator between the K3 and the junction. (Tested with 100W into a dummy load.) 73 Bill AE6JV --- Bill Frantz|The nice thing about standards| Periwinkle (408)356-8506 |is there are so many to choose| 16345 Englewood Ave www.pwpconsult.com |from. - Andrew Tanenbaum| Los Gatos, CA 95032 __ 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] KSYN3A synthesizer question
Unless you want to remove the sub receiver, you will need two new synths. 73 Bill AE6JV On 10/26/15 at 2:55 PM, idar...@gmail.com (KD3TB) wrote: > I have an older K3 with a sub receiver that I am thinking of upgrading. > This is a second radio that I use at my beach house. If I rarely use the sub > receiver, can I just upgrade the main receiver board with one KSYN3A > synthesizer or do I need to purchase two KSYN3A synthesizers? - Bill Frantz| Re: Hardware Management Modes: | Periwinkle (408)356-8506 | If there's a mode, there's a | 16345 Englewood Ave www.pwpconsult.com | failure mode. - Jerry Leichter | Los Gatos, CA 95032 __ 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] KSYN3A synthesizer question
You need two. The K3 cannot handle one of each in the same receiver. 73, Ron AC7AC -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of KD3TB Sent: Monday, October 26, 2015 2:56 PM To: 'Elecraft Reflector' Subject: [Elecraft] KSYN3A synthesizer question I have an older K3 with a sub receiver that I am thinking of upgrading. This is a second radio that I use at my beach house. If I rarely use the sub receiver, can I just upgrade the main receiver board with one KSYN3A synthesizer or do I need to purchase two KSYN3A synthesizers? Irwin Darack - KD3TB __ 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 Voltage on TX
It would be nice to have test point type jacks on the back of the K3 to test the voltage drop from the PS through the APP's entering the K3. This would check the accuracy of the K3 volt-meter as well. I don't remember what it looks like in the vicinity of the APP's. The next best thing we have is the 12V jack, but I think that has two diodes in series to it. Dick, n0ce On 10/26/2015 12:05 PM, Rich wrote: Thanks to all. I have check my PS and it does not fluctuate even a tenth of a volt on TX.With the radio connected directly to the PS. I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer at the wire gauge and connectors. That is still about 2VDC drop. Thanks for the help rich __ 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 Voltage on TX
This discussion has got me confused. If a power supply fails, it is pretty easy to fault find. If you use the correct size cable for the length you require, then it WILL work. Discussions on APP and test points seem to me to be a little pedantic as apart from from a power supply failure I have not had voltage drop issues other than killing a large battery bank while exuberantly working a field day operation some years ago. I blame Eric for chatting to me too long on that occasion😊 From memory the only other fault I have seen was a disconnected APP on the board. The owner told me had no idea how that came about. I re-soldered the connection and the K3 came back to life. Caveat emptor..i have always used a heavier DC power lead. Gary -Original Message- From: "Richard Fjeld" Sent: 27/10/2015 9:30 AM To: "elecraft@mailman.qth.net" Subject: Re: [Elecraft] K3 Voltage on TX It would be nice to have test point type jacks on the back of the K3 to test the voltage drop from the PS through the APP's entering the K3. This would check the accuracy of the K3 volt-meter as well. I don't remember what it looks like in the vicinity of the APP's. The next best thing we have is the 12V jack, but I think that has two diodes in series to it. Dick, n0ce On 10/26/2015 12:05 PM, Rich wrote: > Thanks to all. I have check my PS and it does not fluctuate even a > tenth of a volt on TX.With the radio connected directly to the PS. > I am now seeing 14.1 VDC and 12.0 VDC on TX. So I need to look closer > at the wire gauge and connectors. That is still about 2VDC drop. > > Thanks for the help > > rich > __ 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 vk1zzg...@gmail.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] So: Which mini-keyboard to use with the PX3?
Hi all, I'm shopping for a very compact (10" or less in width) wireless keyboard to use with my PX3. Obviously it'll be no-frills, no numeric keypad, etc. The Logitech 360 works great but takes up too much space, IMHO. The PX3's keyboard feature has been in test for awhile. Can anyone enthusiastically endorse a specific keyboard that works with the PX3, is small, inexpensive, and widely available? If we find one that meets these criteria, we may start stocking 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 arch...@mail-archive.com
Re: [Elecraft] So: Which mini-keyboard to use with the PX3?
Wayne with my P3 I use a Flexible roll-up usb keyboard don't remember the brand off hand. Fred. N0AZZ Sent from my iPad > On Oct 26, 2015, at 7:25 PM, Wayne Burdick wrote: > > Hi all, > > I'm shopping for a very compact (10" or less in width) wireless keyboard to > use with my PX3. Obviously it'll be no-frills, no numeric keypad, etc. The > Logitech 360 works great but takes up too much space, IMHO. > > The PX3's keyboard feature has been in test for awhile. Can anyone > enthusiastically endorse a specific keyboard that works with the PX3, is > small, inexpensive, and widely available? > > If we find one that meets these criteria, we may start stocking 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 m...@totalhighspeed.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] K3 Voltage on TX
If voltage is being checked via the K3 display, I believe there is a series diode before the internal metering that adds a 0.6V drop in TX? 73, Mike AC5P On Monday, October 26, 2015 5:08 PM, Bill Frantz wrote: Perhaps it's vanity, but I like running my rig off solar power and batteries. Since I also take the rig out in the field somewhat frequently, battery power avoids noisy generators. (Besides, I own the panels and batteries, but don't own a generator.) In any case, floating batteries requires a power source during operations which doesn't work really well with solar power at night. The WVARA operation discovered during the last California QSO Party that tired batteries and K3s are a recipe for transmitter distortion and local interference in a multi-radio operation. The N8XJK Battery Booster is an attempt to get more life from tired batteries into the just before dawn hours. 73 Bill AE6JV On 10/26/15 at 2:18 PM, rmcg...@blomand.net (Bob McGraw - K4TAX) wrote: >Well my take.ANYTHING between the power source and radio >has resistance, regardless of how small. Resistance with any >amount of current equals voltage drop. Thus E = IR Where E >is the voltage drop, I is the current and R is the resistance. > >I'm not sure what some of those thing are nor why they are >needed but I do know least is best. As to operating from >batteries, floating AGM batteries at 13.8 should not produce >any voltage drop other than the resistance of the power >cable. Of course a fuse or switch in line does have R so >there goes the regulation as current changes. Nothing is >better than a good regulated supply and hopefully one with >remote voltage sensing. Of course those are more expensive >and more of a challenge to install and then have operate >correctly in the presence of a RF field. > >73 >Bob, K4TAX >K3S s.n. 10163 > >On 10/26/2015 3:55 PM, Bill Frantz wrote: >>I gave up running my K3 through a RigRunner for just that >>reason. I put in a short lead directly to the battery bank APP >>junction strip and things got a lot better. They got even >>better with a N8XJK Boost Regulator between the K3 and the >>junction. (Tested with 100W into a dummy load.) >> >>73 Bill AE6JV --- Bill Frantz |The nice thing about standards| Periwinkle (408)356-8506 |is there are so many to choose| 16345 Englewood Ave www.pwpconsult.com |from. - Andrew Tanenbaum | Los Gatos, CA 95032 __ 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 a...@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] K3 Voltage on TX
Dick, If the main interest is the drop in voltage, the 12V jack will work fine, no matter how many diodes are in series with it. So you get 10 volts during RX and 9 volts during TX, that is a 1 volt drop (OK, that is extreme, but hopefully makes the point). If you are instead looking for the absolute voltage delivered to the K3, use the VFO B voltage display. 73, Don W3FPR On 10/26/2015 7:29 PM, Richard Fjeld wrote: It would be nice to have test point type jacks on the back of the K3 to test the voltage drop from the PS through the APP's entering the K3. This would check the accuracy of the K3 volt-meter as well. I don't remember what it looks like in the vicinity of the APP's. The next best thing we have is the 12V jack, but I think that has two diodes in series to it. __ 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 Voltage on TX
I am using the same SamLex supply with the K3s Elecraft power cord that came with the kit. At 100 Watts key down I can just see the voltmeter move maybe the width of the needle. The readout on the radio does not dim. Earl, K4KAY -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Miller Sent: Monday, October 26, 2015 5:09 PM To: Bill Frantz Cc: Elecraft Reflector Subject: Re: [Elecraft] K3 Voltage on TX I was having too much drop with RR as well. I switched to a 1ft line directly to my Samlex 1235M which has been jacked to 14.4v no load. It only moves a few mV when loaded to 20A. IIRC, the cable is now AWG12. 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 Message delivered to efort...@ctc.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] K3 Voltage on TX
Seems to me the display on VFO B is accurate enough for this purpose. Now to make sure of the accuracy along with voltage drop, measure the voltage at the power supply terminals. I would expect the voltage at the power supply terminals and the VFO B display in receive mode to be identical, +/- meter accuracy. As Don said, diodes or no diodes, the objective is voltage drop at the radio between RX and TX full power. I would perceive anything greater than 0.5 volts as shown on the VFO B display is reason for one to investigate the station DC power distribution. 73 Bob, K4TAX K3S s/n 10163 On 10/26/2015 8:02 PM, Don Wilhelm wrote: Dick, If the main interest is the drop in voltage, the 12V jack will work fine, no matter how many diodes are in series with it. So you get 10 volts during RX and 9 volts during TX, that is a 1 volt drop (OK, that is extreme, but hopefully makes the point). If you are instead looking for the absolute voltage delivered to the K3, use the VFO B voltage display. 73, Don W3FPR __ 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] Issue Resolved K3 Voltage on TX
Thanks for all of the great advice. I have made several changes and here are the results. I wired my radio directly to the PS with AGW 10 probably about four feet. Thus removing the radio from the automatic battery switch over and then from the rigrunner. I now have the following voltages measured with the VFO B display. No fuse in line - 14.2VDC RX 13.6VDC TX Power pole fuse block 30amp bladed fuses 14.2VDC RX 12.8VDC TX Obviously I am not going to leave myself without fuses. So 12.8VDC seems to be the number. My external watt meter reads 107watts out. Thank you all for you help. Rich __ 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] KAT500 - Utility not working - FINAL REPORT
Some may recall I had a issue with my KAT500 not connecting to the computer therefore not allowing me to use the KAT Utility. After checking com ports and ever purchasing a new KXUSB cable from Elecraft, I sent the unit off to the mother ship for a look-see. Turns out we lost transistors Q1 and Q2. They were replaced and all is well once again. I do not know how or why they were "blown" but we happy all is once again working. Thanks to the Elecraft Team and Service Tech Cory for the quick turn around. Bill-W0BBI __ 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] So: Which mini-keyboard to use with the PX3?
I used several different keyboards, including two from Logitech, but prefer the slim wireless from Anker. I'm a touch typist and don't need a numeric keypad for hamming, but I do want full size keys and full spacing. This is the best I've found: http://www.amazon.com/Anker-Wireless-Compact-Keyboard-Dedicated/dp/B00PK07616/ref=sr_1_1?ie=UTF8&qid=1445909318&sr=8-1-spons&keywords=anker+wireless+keyboard+ultra+slim&psc=1 It matches the KX3/PX3 in style, color, and (light) weight, looks good, feels good, and it's affordable. -- Marc W8SDG >> On Oct 26, 2015, at 7:25 PM, Wayne Burdick wrote: >> >> I'm shopping for a very compact (10" or less in width) wireless keyboard to >> use with my PX3. Obviously it'll be no-frills, no numeric keypad, etc. The >> Logitech 360 works great but takes up too much space, IMHO. >> >> The PX3's keyboard feature has been in test for awhile. Can anyone >> enthusiastically endorse a specific keyboard that works with the PX3, is >> small, inexpensive, and widely available? >> >> 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 arch...@mail-archive.com
Re: [Elecraft] So: Which mini-keyboard to use with the PX3?
Nice. Wayne On Oct 26, 2015, at 6:39 PM, Marc Veeneman wrote: > I used several different keyboards, including two from Logitech, but prefer > the slim wireless from Anker. I'm a touch typist and don't need a numeric > keypad for hamming, but I do want full size keys and full spacing. This is > the best I've found: > http://www.amazon.com/Anker-Wireless-Compact-Keyboard-Dedicated/dp/B00PK07616/ref=sr_1_1?ie=UTF8&qid=1445909318&sr=8-1-spons&keywords=anker+wireless+keyboard+ultra+slim&psc=1 > > It matches the KX3/PX3 in style, color, and (light) weight, looks good, feels > good, and it's affordable. > -- > Marc W8SDG > > > > >>> On Oct 26, 2015, at 7:25 PM, Wayne Burdick wrote: >>> >>> I'm shopping for a very compact (10" or less in width) wireless keyboard to >>> use with my PX3. Obviously it'll be no-frills, no numeric keypad, etc. The >>> Logitech 360 works great but takes up too much space, IMHO. >>> >>> The PX3's keyboard feature has been in test for awhile. Can anyone >>> enthusiastically endorse a specific keyboard that works with the PX3, is >>> small, inexpensive, and widely available? >>> >>> 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 arch...@mail-archive.com
Re: [Elecraft] So: Which mini-keyboard to use with the PX3?
I use a Bluetooth version with my Samsung Galaxy 5 phone, and I like it but I'm not a touch typist. It was only $13 on Amazon. I would call it lightweight; some might call it flimsy. 73, Jim N7US -Original Message- I used several different keyboards, including two from Logitech, but prefer the slim wireless from Anker. I'm a touch typist and don't need a numeric keypad for hamming, but I do want full size keys and full spacing. This is the best I've found: http://www.amazon.com/Anker-Wireless-Compact-Keyboard-Dedicated/dp/B00PK0761 6/ref=sr_1_1?ie=UTF8&qid=1445909318&sr=8-1-spons&keywords=anker+wireless+key board+ultra+slim&psc=1 It matches the KX3/PX3 in style, color, and (light) weight, looks good, feels good, and it's affordable. -- Marc W8SDG __ 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] So: Which mini-keyboard to use with the PX3?
On 10/26/2015 05:57 PM, Fred Smith wrote: Wayne with my P3 I use a Flexible roll-up usb keyboard don't remember the brand off hand. Fred. N0AZZ I also have a no-name flexible roll-up keyboard that works fine with the PX3 but I don't like it. I find I have to hit the key precisely in the center to make it work. If you hit it off-center sometimes you miss the character. Alan N1AL __ 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
