[Elecraft] KIO2, KPA100 - is SWR value available via RS232?
Thinking about remoting my K2 (currently QRP with KAT2, one day with KPA100) via TCP/IP (e.g. with Ham Radio Deluxe), I would like to know if SWR value is available via - KIO2 serial interface? - KPA100 built-in serial interface? or do I need some external device like W1? I am going to use an external non-automatic tuner, that's why I need a monitoring of SWR - via PC because of remoting. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KIO2, KPA100 - is SWR value available via RS232?
David, thanks for your reply! I gave it a try in a terminal program. After connection at 4800 baud, DS; returns the frequency SW20; enters tune mode (I changed the tune mode to CALS to have enoogh time for the following command) DS; returns a ?, although I see the SWR on K2's LCD Am I doing something wrong? My firmware is 2.04P 1.09 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Re: phase detector for tuning magnetic loop
Ian GM3SEK referred me to G4WIM's article in Radio Communication Nov'1986 A 1-8 MHz Auto Tuning Verical Antenna. It describes a system, based on phase detector, to tune a motor-driven coil. Magloop's capacitor could be tuned just as well, I think. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: phase detector for tuning magnetic loop
Julian, Lyle, thanks for your replies! Hamsdr magloop tuner is 'simply' an advanced memory device, helping to reproduce a tuning found once quickly again. (PLease correct me if I misunderstood it) I'm still trying to find a magloop tuner which does the same what I do - searching the resonance, no matter if done on this particular frequency before or not. 73! Oleg DL2IPU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: phase detector for tuning magnetic loop
here is a phase discriminator used in a MIL tuner: http://www.tpub.com/content/antennaandmasts/TM-11-5821-284-34/TM-11-5821-284-340011.htm Do you think this is what I was looking for? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] phase detector for tuning magnetic loop
Hi, I'm thinking about building an automatic tuning controller for my magloop. It could search for a current max, but this can be a challenging task. It's probably easier to look for a capacitor position where the phase between voltage and current crosses the 0, with reasonable deadband for stability. This is probably easier to find than a current max. What I'm looking for is a working example, since my experience is not enough to design the whole from scratch. I found already some commercial devices: http://wimo.de/magnetische-loop-antennen_d.html http://q-mac.ru/en/qmac_mx9027.html Joe K3JLS is working on MLC, too (was www.k3jls.com/mlc.html, should be put live when Joe's project is ready) A nice newsgroup conversation on the same subject: http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.amateur.antenna/2005-10/msg00268.html Does anybody here use an automatic, phase detector based magloop tuner? 73! Oleg DL2IPU ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT2 without balun - which doublet length is better?
Hi, I'm going to use my K2 with KAT2 internal ATU to operate a doublet from 80m to 10m including WARC bands without a balun. Among others, Dave's W8FGU home page inspired me to try this. I hope this is not a problem, especially when battery-fed during portable operation, as there is [almost] no HF-connection to the ground (the whole system is 'floating') Quick modelling of 2x20m + 13.5m feeder antenna shows that KAT2 should be able to do the job, as its 20uH and 2400pF are enough on all bands. My question is: can/should I make it easier for KAT2, e.g. choosing other antenna or feeder lentgh or maybe adding/removing a piece of feeder on some bands? Are there some proven length to use? 73 Oleg ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: KAT2 C55 adjustment - jumping 099-000
I think I found it. Making 1-turn loop through T1, I made the wire jumper about 1/4 shorter as suggested in manual. After replacing it with correct 1-1/4 one, I am able to reach 007 mV with C55 adjustment. (thanks to http://www.qsl.net/ve3mcf/elecraft_reflect/KAT2_Setup_C55.txt) Now the next problem: after CALp, competed with RF-probe and DMM, SWR reading is still very inaccurate. E.g. 1.4:1 at 25 Ohm instead of 2:1. Have I to go for 2 dummy loads method (25 and 100 Ohm) or can I investigate something before? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: KAT2 C55 adjustment - jumping 099-000
Don, thanks for quick answer! With calibrate the SWR, do you mean simply adjusting REFL R2 until SWR reading is correct, without touching C55 and FWD R1 any more? Oleg ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KAT2 C55 adjustment - jumping 099-000
Folks, yet another KAT2 SWR bridge null adjustment question. I can reach 003 mV in ATU CALn mode. But after exiting and entering CALn again, K2 displays 097, 098, 099, 000, 001 and so on till it reaches a steady state around 003. What could it mean? Looks to me like a display value overrun at 100... Pin 1 of LM358 has 0V on RX and 3.1V on TUNE. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] AUX not available for PC when using KAT100?
I'm thinking about purchasing KPA100 and KAT100 for my K2. Is the following true? KAT100 occupies AUX port of KPA100 and makes controlling K2 from PC (MixW etc) impossible. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] AUX not available for PC when using KAT100?
Doug, Jim, Tom, thanks for resolving my doubts! ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KSB2 - need to configure P1 before coarse carrier balance?
Hi, I'm currently checking/aligning my KSB2. The microphone is not purchased until now, but I still wanted to adjust KSB2 tonight as far as I could. Can I do a coarse carrier adjustment without configuring P1 first? (R1 has no effect on field strength, S-meter is zero) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 BFO alignment - pls check my values
Hi, I've just done BFO alignment and freq. calibration on my K2 and have some questions. I can zero beat AM stations around 7130 kHz with +-10Hz. 1) BFO range: High freq. = 4917.13 KHz (= 4916.3 - ok) Low freq. = 4913.08 KHz (not = 4912.7 !!!) Range 4.05 kHz (= 3.6 kHz - ok) Should I have concern about BFO low freq. is 1.1kHz too high? 2) BFO alignment: I did not found any instructions on how I should use filter crystals frequency written on the bag. It is 3.6 in my case. Nevertheless I am able to get all FL1-FL4 into desired range, using RF noise and SpectranV2 on my PC. The pitch does not change when I toggle cw and cw rev. Are my BFO alignment values ok? +---+---+-+---+ |Mode |FL1| BF1 | +---+---+-+---+ |CW norm|1,50 |bF1t103c |4913,60| |CW rev | |bF1t148c |4914,71| |LSB|2,20 |bF1t092l |4913,51| |USB| |bF1t181u |4916,00| +---+---+-+---+ +---+---++---+ |Mode |FL2| BF2 | +---+---++---+ |CW norm|0,70 |bF2 033c|4913,22| |CW rev | |bF2 137c|4914,21| |LSB|2,00 |bF2 114l|4913,70| |USB| |bF2 171u|4915,70| +---+---++---+ +---+---+-+---+ |Mode |FL3| BF3 | +---+---+-+---+ |CW norm|0,40 |bF3 021c |4913,18| |CW rev | |bF3 136c |4914,17| |LSB|1,80 |bF3 090l |4913,50| |USB| |bF3 168u |4915,59| +---+---+-+---+ +---+---++---+ |Mode |FL4| BF4| +---+---++---+ |CW norm|0,20 |bF4 013c|4913,14| |CW rev | |bF4 135c|4914,13| |LSB|1,60 |bF4 090l|4913,50| |USB| |bF4 161u|4915,31| +---+---++---+ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
