Re: [Elecraft] K3 and hearing aids
Just about every hearing aid maker has something like this. It's not unique to Widex, or Oticon, or any other make. On 11/17/2014 6:47 PM, Lewis Phelps wrote: Hi, guys. I wear hearing aids in both ears. I found a device that allows me to use my hearing aids as headphones. My hearing aids are made by Widex. Wide offers a small accessory device called the MDEX, which communicates by radio waves (not Bluetooth) with the two hearing aids. The MDEX communicates by Bluetooth with cell phones and any other devices that have Bluetooth audio capability. The MDEX (which is about half the size of a pack of cigarettes) can also be connected directly to the K3 with a mini-stereo cable. In that mode, the K3 audio goes directly to my hearing aids. I can shut off room noise if I wish, or leave it to be piped into my ears along with the radio audio. More info is available at http://www.widex.com/en/products/accessories/dex/mdex/ about the MDEX device. Warning: this is not a low-budget solution to the headset problem. The hearing aids are $3K each, and the MDEX costs about $400. But it works well when I want to use the hearing aids as a headset, either for ham radio or music listening purposes. 73, Lew Lew Phelps N6LEW Pasadena, CA DM04wd Elecraft K3-10 Yaesu FT-7800 l...@n6lew.us www.n6lew.us “The plural of ‘anecdote’ is not ‘data.’” __ 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 k...@coldrockshotbrooms.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] ExtRef input impedance?
I'm going to go out on a limb and say 50 ohms (my guess) My Reference and cables are 50 Ohms From: Jim Miller To: Elecraft Reflector Sent: Monday, November 17, 2014 6:29 PM Subject: [Elecraft] [K3] ExtRef input impedance? Anyone know the input impedance of the K3 ExtREF input? Thanks 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 hlyin...@yahoo.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 and hearing aids
Fred, ReSound sells hearing aids that work with their own Mini-Mic. The Mini-Mic pairs with the hearing aids and plugs into any headphone output (I needed an adapter for the small Mini-Mic plug and the big phone plug on the K3). 73, Jan, KX2A On 11/17/2014 6:36 PM, Fred Jensen wrote: On 11/17/2014 1:01 PM, Phil Wheeler wrote: I added a hearing aid to my only functional ear a week ago and found not only improved volume but improved freq response (in retrospect, not a surprise!). Now folks with high, "squeaky" voices are much more intelligible than they were before. Very important topic for those of us with compromised hearing. Both my ears still work, but the bulk of my hearing disappeared in one event one night many years ago. I hear almost nothing above about 1200 Hz where both ears are about 85 dB down, without the $6,000 worth of microelectronics stuffed into my ears [fortunately, the government pays for mine :-)]. My new ones can identify music, conversation, noise, fire truck sirens, and CW, and adjust accordingly. They even talk to each other so they change programs together. The downside is using headphones: I've preferred an Apple ear bud and have quite a collection. So I'm experimenting with new headphones vs. removing the hearing aid. I tried one over the ear type, well reviewed, that resulted in a sequence of chimes in the hearing aid -- not a good sign. Mine do not work under my headphones [Heil Pro-Set I got from Elecraft], they just shut down. I run the AF Gain at about 1 o'clock on CW [don't operate much SSB, too hard to understand] which is right at the beginning of distortion in the cans. I don't know if it's coming from the K3 audio amp, or the headphones are being overdriven. My CW sidetone is at 570 Hz, and I use a mark of 915 Hz on RTTY, both of which I can hear if they're loud enough. Since the hearing aids communicate with each other [if I manually turn one up or down, the other does it too ... some bluetooth-ish thing I suppose], I've wondered if there's a way to feed audio directly into them from the K3. I haven't found one yet, and I don't know if it would be better than the headphones. If the audio distortion is coming from the AF amp in the K3, an outboard amp might allow me to get higher sound levels in the headphones. If it's coming from overdriving the headphones, maybe I need a better headset/mic? If anyone has any experience driving digital hearing aids directly, I'd like to discuss it with you. My aids are Phonak Savia's. SS SSB and NAQP SSB are the only phone contests I play in, and only then to create some points for my club. Last weekend's SS SSB was a real slog for me. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.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 ditz...@windstream.net - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4213/8588 - Release Date: 11/17/14 __ 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 and hearing aids
Hi, guys. I wear hearing aids in both ears. I found a device that allows me to use my hearing aids as headphones. My hearing aids are made by Widex. Wide offers a small accessory device called the MDEX, which communicates by radio waves (not Bluetooth) with the two hearing aids. The MDEX communicates by Bluetooth with cell phones and any other devices that have Bluetooth audio capability. The MDEX (which is about half the size of a pack of cigarettes) can also be connected directly to the K3 with a mini-stereo cable. In that mode, the K3 audio goes directly to my hearing aids. I can shut off room noise if I wish, or leave it to be piped into my ears along with the radio audio. More info is available at http://www.widex.com/en/products/accessories/dex/mdex/ about the MDEX device. Warning: this is not a low-budget solution to the headset problem. The hearing aids are $3K each, and the MDEX costs about $400. But it works well when I want to use the hearing aids as a headset, either for ham radio or music listening purposes. 73, Lew Lew Phelps N6LEW Pasadena, CA DM04wd Elecraft K3-10 Yaesu FT-7800 l...@n6lew.us www.n6lew.us “The plural of ‘anecdote’ is not ‘data.’” __ 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] ESSB
I had the fortunate experience to work Jim during the contest and yes he had a nice clean signal. With the settings on my K3, Heil IC mic and SGC power cube I had multiple comments on my signal and how nice it sounded. It felt good to have busy contesters make such a statement. Right before the contest I adjusted my compression to 10db per meter on the K3 front panel and I have a 2.7 filter installed. ~73 Don KD8NNU 2014 3905CC Top Gun :-) -.- -.. ---.. -. -. ..- -Original Message- From: Al Lorona Sent: Monday, November 17, 2014 2:05 PM Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] ESSB I'm glad K9YC answered your question. If you heard Jim's signal during the SS this weekend then you got to hear what the shaping he is describing sounded like. His audio was very piercing but clean. It's not what I would want to hear during a long ragchew with him, but his purpose was to project his intelligibility across 40 meters for the purpose of a 30-second contact. Another way to look at this is that our ear is most sensitive to frequencies around 2 kHz (roughly) and so you really want to put as much of your power in that region as you can. In this way, you're using the response of the other op's ear to your advantage. To further paraphrase what Jim said, when it comes to compression, "A little is good, but more is not better," as evidenced by so many shockingly bad signals this weekend. I wish someone would undertake a project to send contesters recordings of themselves. I happened to be listening when a station with especially egregious audio called K9YC, who gave the op a quick but honest report at the end of his exchange. Who knows if that station will heed the advice for the next contest. Al W6LX __ 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 gold...@charter.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 KPA500 power on 24/7
Stephen & Eric, FWIW. I spent 3 years stuffing 2 shilling coins in my Mother-In-Law's electric meter box in Nottingham (1959-62). That was always fun. My rate here is $0.0503 KW/Hr. And we have so much less static than CA. Sorry folks, my 2 cents, back to the hole. 73, Rick, W7LKG -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Stephen Prior Sent: Monday, November 17, 2014 14:51 To: Elecraft Subject: Re: [Elecraft] K3 KPA500 power on 24/7 Anyone who, for no really good reason, leaves anything on 24/7, must be paying far less for their electricity than we do over on this side of the Atlantic! 73 Stephen, G4SJP On 17 November 2014 22:40, norrislawfirm2 wrote: > Why would you want to leave it on? It's just wasting power, though > being Elecraft, not much. I turn everything off, ground all antennas, and > switch > the k-line into a dummy load. Even for the demands of EME the K3 and > XV-144 are stable in 20 minutes. > > I once had the K3 go into a runaway state where it started > transmitting on a 12 mhz frequency I use to listen to marine cw during > the annual Night of Nights. Smoke escaped. Elecraft Support was > baffled, but it has never reoccured (after the K3 was repaired). It could > have been my PC. > > I leave the K3 unattended when it is running WSPR, but I don't > understand what the upside is to leaving everything on when there are > known and unknown downsides, static discharges for example. > > Stuff Happens. > > 73 > > Eric WD6DBM > > __ > 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 > norrislawfi...@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] Trade a KX3 and KXPA100 for a K3-100?
In a strange twist of fate, I have 2 complete KX3 /KXPA100 systems. I am interested in trading one for a K3 with at least 100 watt amp and antenna tuner. It would be most desirable if the K3 was a later model, from a non smoking environment. I have: KX3-F Transceiver, serial 3912, with the following options: MH3 Microphone KXFL3 Roofing Filter KXAT3 Tuner KXPD3 Keyer Paddle KXBC3 Battery Charger Eneloop Batteries KX3-PCKT Cable Kit KXPA100 Amplifier, serial 0278, with the following: KXAT100 Tuner KXPACBL Cable Kit And I would like: A late model K3/100 with at least the KAT3 tuner, from a non smoking environment If you're interested, drop me a note. 73 Jim k...@arrl.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/KX3 CW Sidetone Pitch
Hi Phil, The following article is a good introduction to demodulating SSB in DSP: https://www.arrl.org/files/file/Technology/tis/info/pdf/98qex003.pdf It has a bit of maths without going too overboard, and gives you the flavour of how it works. But simplifying as much as possible: - based on the sidetone setting eg. at 700Hz, the DSP will produce a sine wave audio output at 700Hz and add it to the output audio of the radio demodulator. - the frequency of local oscillator in the KX3 is set to the frequency of the signal of interest plus 700Hz, and put through a quadrature mixer. This brings the signal down to a baseband at 700Hz. - the I and Q output of the mixer is sampled by an A-D converter, and the maths mentioned in the article linked above is used to remove the opposite sideband image, and you are left wi the desired signal at 700Hz. When mixed with the 700Hz sidetone, you hear a single tone. - if you tune the VFO a bit, it moves the local oscillator, and the demodulate signal is no longer exactly at 700Hz. You will hear the resulting signal "beat" against the 700Hz generated sidetone. - when you transmit, it will be based on the sidetone frequency, eg. 700Hz. If you have zero-beating in the receiver, then you know the output of the transmitter will exactly match the received signal frequency. If we select CW-R, then we put the LO 700Hz below the signal of interest. If we select other features like IF SHFT=8kHz, dual watch, etc. then the maths gets a bit more complicated, but essentially amounts to implementing a second mixer stage in DSP software. 73, Matt VK2RQ > On 18 Nov 2014, at 11:42 am, Phil Hystad wrote: > > Don, > > Thanks for the comments. This I guess will be enough. I probably wouldn't > do too much with the DSP math anyway although I have written some digital > filters and playing around with FFT using signals that I invent > mathematically and also some captured audio streams. But, all this was using > Mathematica (Wolfram) so a lot of the heavy lifting is already done for me > (e.g. the FFT and various functions for managing the data). > > 73, phil, K7PEH > > >> On Nov 17, 2014, at 3:13 PM, Don Wilhelm wrote: >> >> Phil, >> >> The sidetone is a constant audio pitch sent through the audio amplifier >> (once you select the pitch you desire). It is not a function of the VFO, it >> is just a constant tone. >> The demodulated audio (from the signal you are listening to) does vary with >> the VFO setting. >> So yes, the selected sidetone pitch tells the DSP not only what spot pitch >> to send, it also is used to figure out how much frequency offset to use on >> the signal received as a result of the VFO setting. >> >> I can't give you the DSP math to produce that, but Lyle certainly could. I >> suspect the demodulated signal tones and the sidetone are simply added - >> that is at least the result in the analog world. I do know the BFO/signal >> relationship is a "mixer" process and if I recall that in DSP math is some >> sort of multiplication process - as you can tell, I am not well steeped in >> DSP techniques, but I do recall a bit of signal processing math from my >> college days even though that was 54 years ago and I did not use that >> theoretical level of it, so much has become 'fuzzy' with time. >> >> Perhaps some study of DSP algorithms would help you out. >> >> 73, >> Don W3FPR >> >>> On 11/17/2014 5:51 PM, Phil Hystad wrote: >>> OK, so side tone generator is a DSP function. But, your answer leaves a >>> lot of details out. >>> >>> So, if I am using the side tone generator to zero beat another CW station, >>> I do two things. >>> One, I adjust the sidetone pitch to something I prefer. Two, for the >>> actual CW station, I >>> adjust the VFO until the pitch of the CW signal closely matches my sidetone >>> pitch. (I know, >>> I could push the spot button too and I usually do that). >>> >>> If this is true, then the sidetone generation itself is a function of the >>> VFO frequency, that is, >>> it is, say, 600 Hz away for example in a BFO kind of way. >>> >>> I was looking for a description of more of the details of how this was >>> implemented and I admit >>> it is to satisfy my curiosity. Math functions don't scare me though, I did >>> my graduate work in >>> Math. I admit to being a bit weaker with typical DSP algorithms -- more of >>> a philistine than a >>> practitioner. >>> >>> 73, phil, K7PEH >>> >>> On Nov 17, 2014, at 2:16 PM, Don Wilhelm wrote: Phil, The CW sidetone is nothing more than a set of math functions inside the DSP. With the proper DSP code, you can make up most any kind of sound wanted, even sidetone mixed with demodulated signals. That is what the DSP board firmware is all about (plus a lot more). 73, Don W3FPR > On 11/17/2014 4:57 PM, Phil Hystad wrote: > I am asking this question of K3 and KX3 since I am ass
Re: [Elecraft] K3/KX3 CW Sidetone Pitch
Don, Thanks for the comments. This I guess will be enough. I probably wouldn't do too much with the DSP math anyway although I have written some digital filters and playing around with FFT using signals that I invent mathematically and also some captured audio streams. But, all this was using Mathematica (Wolfram) so a lot of the heavy lifting is already done for me (e.g. the FFT and various functions for managing the data). 73, phil, K7PEH > On Nov 17, 2014, at 3:13 PM, Don Wilhelm wrote: > > Phil, > > The sidetone is a constant audio pitch sent through the audio amplifier (once > you select the pitch you desire). It is not a function of the VFO, it is > just a constant tone. > The demodulated audio (from the signal you are listening to) does vary with > the VFO setting. > So yes, the selected sidetone pitch tells the DSP not only what spot pitch to > send, it also is used to figure out how much frequency offset to use on the > signal received as a result of the VFO setting. > > I can't give you the DSP math to produce that, but Lyle certainly could. I > suspect the demodulated signal tones and the sidetone are simply added - that > is at least the result in the analog world. I do know the BFO/signal > relationship is a "mixer" process and if I recall that in DSP math is some > sort of multiplication process - as you can tell, I am not well steeped in > DSP techniques, but I do recall a bit of signal processing math from my > college days even though that was 54 years ago and I did not use that > theoretical level of it, so much has become 'fuzzy' with time. > > Perhaps some study of DSP algorithms would help you out. > > 73, > Don W3FPR > > On 11/17/2014 5:51 PM, Phil Hystad wrote: >> OK, so side tone generator is a DSP function. But, your answer leaves a lot >> of details out. >> >> So, if I am using the side tone generator to zero beat another CW station, I >> do two things. >> One, I adjust the sidetone pitch to something I prefer. Two, for the actual >> CW station, I >> adjust the VFO until the pitch of the CW signal closely matches my sidetone >> pitch. (I know, >> I could push the spot button too and I usually do that). >> >> If this is true, then the sidetone generation itself is a function of the >> VFO frequency, that is, >> it is, say, 600 Hz away for example in a BFO kind of way. >> >> I was looking for a description of more of the details of how this was >> implemented and I admit >> it is to satisfy my curiosity. Math functions don't scare me though, I did >> my graduate work in >> Math. I admit to being a bit weaker with typical DSP algorithms -- more of >> a philistine than a >> practitioner. >> >> 73, phil, K7PEH >> >> >>> On Nov 17, 2014, at 2:16 PM, Don Wilhelm wrote: >>> >>> Phil, >>> >>> The CW sidetone is nothing more than a set of math functions inside the DSP. >>> With the proper DSP code, you can make up most any kind of sound wanted, >>> even sidetone mixed with demodulated signals. That is what the DSP board >>> firmware is all about (plus a lot more). >>> >>> 73, >>> Don W3FPR >>> >>> On 11/17/2014 4:57 PM, Phil Hystad wrote: I am asking this question of K3 and KX3 since I am assuming that the answer is the same for both rigs. If it is different, maybe someone can let me know. Question: Is the CW sidetone generated as a separate audio oscillator circuit or is it generated from a BFO type circuit? This morning, I started thinking of this question and I realized that I don’t know too much about how CW sidetone is implemented. I am thinking it is a separate audio oscillator but I may very well be wrong. Follow up Question: If the CW sidetone is a separate audio oscillator, what is happening (details preferred) when you use the sidetone to zero beat a CW signal. >> __ >> 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
[Elecraft] K3 and hearing aids
On 11/17/2014 1:01 PM, Phil Wheeler wrote: I added a hearing aid to my only functional ear a week ago and found not only improved volume but improved freq response (in retrospect, not a surprise!). Now folks with high, "squeaky" voices are much more intelligible than they were before. Very important topic for those of us with compromised hearing. Both my ears still work, but the bulk of my hearing disappeared in one event one night many years ago. I hear almost nothing above about 1200 Hz where both ears are about 85 dB down, without the $6,000 worth of microelectronics stuffed into my ears [fortunately, the government pays for mine :-)]. My new ones can identify music, conversation, noise, fire truck sirens, and CW, and adjust accordingly. They even talk to each other so they change programs together. The downside is using headphones: I've preferred an Apple ear bud and have quite a collection. So I'm experimenting with new headphones vs. removing the hearing aid. I tried one over the ear type, well reviewed, that resulted in a sequence of chimes in the hearing aid -- not a good sign. Mine do not work under my headphones [Heil Pro-Set I got from Elecraft], they just shut down. I run the AF Gain at about 1 o'clock on CW [don't operate much SSB, too hard to understand] which is right at the beginning of distortion in the cans. I don't know if it's coming from the K3 audio amp, or the headphones are being overdriven. My CW sidetone is at 570 Hz, and I use a mark of 915 Hz on RTTY, both of which I can hear if they're loud enough. Since the hearing aids communicate with each other [if I manually turn one up or down, the other does it too ... some bluetooth-ish thing I suppose], I've wondered if there's a way to feed audio directly into them from the K3. I haven't found one yet, and I don't know if it would be better than the headphones. If the audio distortion is coming from the AF amp in the K3, an outboard amp might allow me to get higher sound levels in the headphones. If it's coming from overdriving the headphones, maybe I need a better headset/mic? If anyone has any experience driving digital hearing aids directly, I'd like to discuss it with you. My aids are Phonak Savia's. SS SSB and NAQP SSB are the only phone contests I play in, and only then to create some points for my club. Last weekend's SS SSB was a real slog for me. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015 - www.cqp.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 arch...@mail-archive.com
Re: [Elecraft] [K3] ExtRef input impedance?
Jim, Assume in the range of 50 ohms and you will be very close to correct. That goes for most equipment external connections as well. 50 ohms is a de-facto standard for equipment interconnects. 73, Don W3FPR On 11/17/2014 6:29 PM, Jim Miller wrote: Anyone know the input impedance of the K3 ExtREF input? Thanks __ 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 KPA500 power on 24/7
Jack, From what I know about solid state electronics, it does not make much difference in the life of the gear. The Mean Time Between Failure for any component is so great (mostly 100,000 hours or more) that it is only a minor consideration. Of greater concern is "what can happen during idle periods" - such as a lightning or other static event that can cause damage. That can happen whether the equipment is powered or not. So, when the transceiver is not in use, switch the antenna connection to a dummy load is a good preventative measure. Yes, lightning surge paths can be other than the antenna, they can come in on the AC power lines or the telco line (read as computer connections), but a connected antenna is the most likely 'gatherer' of lightning and static charges. 73, Don W3FPR On 11/17/2014 6:16 PM, W4GRJ wrote: My question is technical not financial I just wanted opinions of which is best for the equipment on 24/7 or not Maybe the answer is it doesn't matter. Jack W4GRJ __ 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 KPA500 power on 24/7
Jack, I suspect that it really doesn't matter too much - components these days are far less susceptible to turn-on shock. Were the electrical energy free, I would probably leave it all on. And all the lights, heating etc, but that's a different matter as we all know :-) Now, according to something I've read today on the BBC website, if your guys over at the skunkworks at Lockheed-Martin can pull off their fusion reactor as they hope, we _shall_ be able to leave it all on without regard to cost/global warming etc! I wish them luck with that! Looks very interesting. 73, Stephen G4SJP On 17 November 2014 23:16, W4GRJ wrote: > My question is technical not financial I just wanted opinions of > which is best for the equipment on 24/7 or not Maybe the answer is it > doesn't matter. > Jack > W4GRJ > > > On Nov 17, 2014, at 5:40 PM, norrislawfirm2 > wrote: > > Why would you want to leave it on? It's just wasting power, though being > Elecraft, not much. I turn everything off, ground all antennas, and switch > the k-line into a dummy load. Even for the demands of EME the K3 and > XV-144 are stable in 20 minutes. > > I once had the K3 go into a runaway state where it started transmitting on > a 12 mhz frequency I use to listen to marine cw during the annual Night of > Nights. Smoke escaped. Elecraft Support was baffled, but it has never > reoccured (after the K3 was repaired). It could have been my PC. > > I leave the K3 unattended when it is running WSPR, but I don't understand > what the upside is to leaving everything on when there are known and > unknown downsides, static discharges for example. > > Stuff Happens. > > 73 > > Eric WD6DBM > > > Sent on a Sprint Samsung Galaxy S® III > > > Original message > From: w4grj > Date:11/17/2014 5:47 AM (GMT-08:00) > To: elecraft@mailman.qth.net > Subject: [Elecraft] K3 KPA500 power on 24/7 > > What are opinions of leaving my K3 and KPA500 on 24/7 or should they > be powered on and off for daily use? > Jack > W4GRJ > > > __ > 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 norrislawfi...@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 eastbrantw...@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] [K3] ExtRef input impedance?
Anyone know the input impedance of the K3 ExtREF input? Thanks 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 KPA500 power on 24/7
My question is technical not financial I just wanted opinions of which is best for the equipment on 24/7 or not Maybe the answer is it doesn't matter. Jack W4GRJ On Nov 17, 2014, at 5:40 PM, norrislawfirm2 wrote: Why would you want to leave it on? It's just wasting power, though being Elecraft, not much. I turn everything off, ground all antennas, and switch the k-line into a dummy load. Even for the demands of EME the K3 and XV-144 are stable in 20 minutes. I once had the K3 go into a runaway state where it started transmitting on a 12 mhz frequency I use to listen to marine cw during the annual Night of Nights. Smoke escaped. Elecraft Support was baffled, but it has never reoccured (after the K3 was repaired). It could have been my PC. I leave the K3 unattended when it is running WSPR, but I don't understand what the upside is to leaving everything on when there are known and unknown downsides, static discharges for example. Stuff Happens. 73 Eric WD6DBM Sent on a Sprint Samsung Galaxy S® III Original message From: w4grj Date:11/17/2014 5:47 AM (GMT-08:00) To: elecraft@mailman.qth.net Subject: [Elecraft] K3 KPA500 power on 24/7 What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? Jack W4GRJ __ 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 norrislawfi...@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
Re: [Elecraft] K3/KX3 CW Sidetone Pitch
Phil, The sidetone is a constant audio pitch sent through the audio amplifier (once you select the pitch you desire). It is not a function of the VFO, it is just a constant tone. The demodulated audio (from the signal you are listening to) does vary with the VFO setting. So yes, the selected sidetone pitch tells the DSP not only what spot pitch to send, it also is used to figure out how much frequency offset to use on the signal received as a result of the VFO setting. I can't give you the DSP math to produce that, but Lyle certainly could. I suspect the demodulated signal tones and the sidetone are simply added - that is at least the result in the analog world. I do know the BFO/signal relationship is a "mixer" process and if I recall that in DSP math is some sort of multiplication process - as you can tell, I am not well steeped in DSP techniques, but I do recall a bit of signal processing math from my college days even though that was 54 years ago and I did not use that theoretical level of it, so much has become 'fuzzy' with time. Perhaps some study of DSP algorithms would help you out. 73, Don W3FPR On 11/17/2014 5:51 PM, Phil Hystad wrote: OK, so side tone generator is a DSP function. But, your answer leaves a lot of details out. So, if I am using the side tone generator to zero beat another CW station, I do two things. One, I adjust the sidetone pitch to something I prefer. Two, for the actual CW station, I adjust the VFO until the pitch of the CW signal closely matches my sidetone pitch. (I know, I could push the spot button too and I usually do that). If this is true, then the sidetone generation itself is a function of the VFO frequency, that is, it is, say, 600 Hz away for example in a BFO kind of way. I was looking for a description of more of the details of how this was implemented and I admit it is to satisfy my curiosity. Math functions don't scare me though, I did my graduate work in Math. I admit to being a bit weaker with typical DSP algorithms -- more of a philistine than a practitioner. 73, phil, K7PEH On Nov 17, 2014, at 2:16 PM, Don Wilhelm wrote: Phil, The CW sidetone is nothing more than a set of math functions inside the DSP. With the proper DSP code, you can make up most any kind of sound wanted, even sidetone mixed with demodulated signals. That is what the DSP board firmware is all about (plus a lot more). 73, Don W3FPR On 11/17/2014 4:57 PM, Phil Hystad wrote: I am asking this question of K3 and KX3 since I am assuming that the answer is the same for both rigs. If it is different, maybe someone can let me know. Question: Is the CW sidetone generated as a separate audio oscillator circuit or is it generated from a BFO type circuit? This morning, I started thinking of this question and I realized that I don’t know too much about how CW sidetone is implemented. I am thinking it is a separate audio oscillator but I may very well be wrong. Follow up Question: If the CW sidetone is a separate audio oscillator, what is happening (details preferred) when you use the sidetone to zero beat a CW signal. __ 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 KPA500 power on 24/7
Anyone who, for no really good reason, leaves anything on 24/7, must be paying far less for their electricity than we do over on this side of the Atlantic! 73 Stephen, G4SJP On 17 November 2014 22:40, norrislawfirm2 wrote: > Why would you want to leave it on? It's just wasting power, though being > Elecraft, not much. I turn everything off, ground all antennas, and switch > the k-line into a dummy load. Even for the demands of EME the K3 and > XV-144 are stable in 20 minutes. > > I once had the K3 go into a runaway state where it started transmitting on > a 12 mhz frequency I use to listen to marine cw during the annual Night of > Nights. Smoke escaped. Elecraft Support was baffled, but it has never > reoccured (after the K3 was repaired). It could have been my PC. > > I leave the K3 unattended when it is running WSPR, but I don't understand > what the upside is to leaving everything on when there are known and > unknown downsides, static discharges for example. > > Stuff Happens. > > 73 > > Eric WD6DBM > > > Sent on a Sprint Samsung Galaxy S® III > > Original message From: w4grj < > w4...@satterfield.org> Date:11/17/2014 5:47 AM (GMT-08:00) > To: elecraft@mailman.qth.net Subject: [Elecraft] K3 > KPA500 power on 24/7 > What are opinions of leaving my K3 and KPA500 on 24/7 or should they > be powered on and off for daily use? > Jack > W4GRJ > > > __ > 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 norrislawfi...@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 eastbrantw...@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
Re: [Elecraft] K3/KX3 CW Sidetone Pitch
OK, so side tone generator is a DSP function. But, your answer leaves a lot of details out. So, if I am using the side tone generator to zero beat another CW station, I do two things. One, I adjust the sidetone pitch to something I prefer. Two, for the actual CW station, I adjust the VFO until the pitch of the CW signal closely matches my sidetone pitch. (I know, I could push the spot button too and I usually do that). If this is true, then the sidetone generation itself is a function of the VFO frequency, that is, it is, say, 600 Hz away for example in a BFO kind of way. I was looking for a description of more of the details of how this was implemented and I admit it is to satisfy my curiosity. Math functions don't scare me though, I did my graduate work in Math. I admit to being a bit weaker with typical DSP algorithms -- more of a philistine than a practitioner. 73, phil, K7PEH > On Nov 17, 2014, at 2:16 PM, Don Wilhelm wrote: > > Phil, > > The CW sidetone is nothing more than a set of math functions inside the DSP. > With the proper DSP code, you can make up most any kind of sound wanted, even > sidetone mixed with demodulated signals. That is what the DSP board firmware > is all about (plus a lot more). > > 73, > Don W3FPR > > On 11/17/2014 4:57 PM, Phil Hystad wrote: >> I am asking this question of K3 and KX3 since I am assuming that the answer >> is the same for both rigs. If it is different, maybe someone can let me >> know. >> >> Question: Is the CW sidetone generated as a separate audio oscillator >> circuit or is it generated from a BFO type circuit? This morning, I started >> thinking of this question and I realized that I don’t know too much about >> how CW sidetone is implemented. I am thinking it is a separate audio >> oscillator but I may very well be wrong. >> >> Follow up Question: If the CW sidetone is a separate audio oscillator, what >> is happening (details preferred) when you use the sidetone to zero beat a CW >> signal. >> >> > __ 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 KPA500 power on 24/7
Why would you want to leave it on? It's just wasting power, though being Elecraft, not much. I turn everything off, ground all antennas, and switch the k-line into a dummy load. Even for the demands of EME the K3 and XV-144 are stable in 20 minutes. I once had the K3 go into a runaway state where it started transmitting on a 12 mhz frequency I use to listen to marine cw during the annual Night of Nights. Smoke escaped. Elecraft Support was baffled, but it has never reoccured (after the K3 was repaired). It could have been my PC. I leave the K3 unattended when it is running WSPR, but I don't understand what the upside is to leaving everything on when there are known and unknown downsides, static discharges for example. Stuff Happens. 73 Eric WD6DBM Sent on a Sprint Samsung Galaxy S® III Original message From: w4grj Date:11/17/2014 5:47 AM (GMT-08:00) To: elecraft@mailman.qth.net Subject: [Elecraft] K3 KPA500 power on 24/7 What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? Jack W4GRJ __ 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 norrislawfi...@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
Re: [Elecraft] ESSB
Folks, This list is not the place to debate where ESSB should, or should not, be allowed, or to criticize those who use it. Please take this portion of the thread to another location. Thread closed. 73, Eric List Moderator elecraft.com On 11/17/2014 1:59 PM, Joe Subich, W4TV wrote: > ESSB has it’s place, just like every other mode. Not every mode has a place on every band. __ 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/KX3 CW Sidetone Pitch
Phil, The CW sidetone is nothing more than a set of math functions inside the DSP. With the proper DSP code, you can make up most any kind of sound wanted, even sidetone mixed with demodulated signals. That is what the DSP board firmware is all about (plus a lot more). 73, Don W3FPR On 11/17/2014 4:57 PM, Phil Hystad wrote: I am asking this question of K3 and KX3 since I am assuming that the answer is the same for both rigs. If it is different, maybe someone can let me know. Question: Is the CW sidetone generated as a separate audio oscillator circuit or is it generated from a BFO type circuit? This morning, I started thinking of this question and I realized that I don’t know too much about how CW sidetone is implemented. I am thinking it is a separate audio oscillator but I may very well be wrong. Follow up Question: If the CW sidetone is a separate audio oscillator, what is happening (details preferred) when you use the sidetone to zero beat a CW signal. __ 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] ESSB
> ESSB has it’s place, just like every other mode. Not every mode has a place on every band. ESSB has no place on any band where wideband FM is not permitted due to the bandwidth. Amateur radio is a communications service, not a broadcast service and 2.7 KHz is all that is necessary for clean SSB with reasonable fidelity ... audio that does no sound tinny, muddy or hollow. The only thing necessary is some appropriate audio shaping, equalization and processing. > I’d far rather have a long afternoon QSO with folks that don’t sound > like parakeets. The ESSB boys that insist on ruler flat audio response from 25 Hz to 5 KHz (or more) with both bass and treble boost to accomplish that flat RF mask are often more difficult to tune and listen to than a well equalized and properly processed standard 2.6 to 2.8 KHz SSB signal due to the non-flat characteristics of the ionosphere. 73, ... Joe, W4TV On 2014-11-17 4:33 PM, GRANT YOUNGMAN wrote: but I still don't like appreciate it: Big hog of bandwidth, IMO. And it's so easily recognizable on my P3 or PX3. Of course, ESSB is not appropriate to contest environments or crowded bands in general. (Although contesting in the aggregate is a far worse band hog than 1 or 2 ESSB QSOs). On the other hand, depending on times and frequencies, large segments of the amateur bands are vast unoccupied wastelands. So to argue (as many do) that ESSB wastes bandwidth .. well, bandwidth isn’t quite like the non-renewable resources we’re quite happy to waste ;) I’d far rather have a long afternoon QSO with folks that don’t sound like parakeets. ESSB has it’s place, just like every other mode. The ESSB on the K3 would be better called “better sounding SSB”, compared to what the hard core ESSB groups like to run. It’s more akin to the sound of vintage phasing rigs (which sound very good generally). And it IS better sounding SSB — provided the guy on the other end isn’t stuck with a 2.1 KHz mech filter or some other restrictive bandwidth. Certainly it’s less effective in working stations close to the noise level, but that isn’t what ESSB is about anyway. Grant NQ5T __ 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 li...@subich.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/KX3 CW Sidetone Pitch
I am asking this question of K3 and KX3 since I am assuming that the answer is the same for both rigs. If it is different, maybe someone can let me know. Question: Is the CW sidetone generated as a separate audio oscillator circuit or is it generated from a BFO type circuit? This morning, I started thinking of this question and I realized that I don’t know too much about how CW sidetone is implemented. I am thinking it is a separate audio oscillator but I may very well be wrong. Follow up Question: If the CW sidetone is a separate audio oscillator, what is happening (details preferred) when you use the sidetone to zero beat a CW signal. Thanks, 73, phil, K7PEH __ 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 CW conector Problem
Hello, a friend of mine, also a Ham, bought his new K3 some weeks ago. He is still leaning all the functions, but has a Problem. He lost the tip of then 1/4" connector of his More-key in the K3 rear connector, After removing of the 1/4" (6.3mm) plug from his K3 he noticed that the tip is missing and still in the Connector in the K3. Has anyone a good idea, how to remove this without destroying the connector? vy 73 Oli DL1OLI/AJ4UR __ 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] ESSB
> but I still don't like appreciate it: Big hog of bandwidth, IMO. And it's so > easily recognizable on my P3 or PX3. Of course, ESSB is not appropriate to contest environments or crowded bands in general. (Although contesting in the aggregate is a far worse band hog than 1 or 2 ESSB QSOs). On the other hand, depending on times and frequencies, large segments of the amateur bands are vast unoccupied wastelands. So to argue (as many do) that ESSB wastes bandwidth .. well, bandwidth isn’t quite like the non-renewable resources we’re quite happy to waste ;) I’d far rather have a long afternoon QSO with folks that don’t sound like parakeets. ESSB has it’s place, just like every other mode. The ESSB on the K3 would be better called “better sounding SSB”, compared to what the hard core ESSB groups like to run. It’s more akin to the sound of vintage phasing rigs (which sound very good generally). And it IS better sounding SSB — provided the guy on the other end isn’t stuck with a 2.1 KHz mech filter or some other restrictive bandwidth. Certainly it’s less effective in working stations close to the noise level, but that isn’t what ESSB is about anyway. Grant NQ5T __ 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] ESSB
On 11/17/14 12:27 PM, Joe Subich, W4TV wrote: > Another way to look at this is that our ear is most sensitive to > frequencies around 2 kHz (roughly) and so you really want to put as > much of your power in that region as you can. In this way, you're > using the response of the other op's ear to your advantage. Not entirely ... equal loudness curves show peak sensitivity around 3 KHz independent of sound pressure levels. Human voice has very little energy between 700 Hz and 1200 Hz with most of the power (fundamental energy from the vocal chords) between 200 and 500 Hz with sibilance and unvoiced energy (sounds made with the tongue, teeth and lips) that contribute to "definition" (consonants) in the 1400-4000+ Hz range. The ear needs a balance (although not 1:1 relationship) between lows and highs for best intelligibility. Yes, very true as I discovered recently. I added a hearing aid to my only functional ear a week ago and found not only improved volume but improved freq response (in retrospect, not a surprise!). Now folks with high, "squeaky" voices are much more intelligible than they were before. The downside is using headphones: I've preferred an Apple ear bud and have quite a collection. So I'm experimenting with new headphones vs. removing the hearing aid. I tried one over the ear type, well reviewed, that resulted in a sequence of chimes in the hearing aid -- not a good sign. So now I can hear ESSB better -- but I still don't like appreciate it: Big hog of bandwidth, IMO. And it's so easily recognizable on my P3 or PX3. 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] ESSB
> Another way to look at this is that our ear is most sensitive to > frequencies around 2 kHz (roughly) and so you really want to put as > much of your power in that region as you can. In this way, you're > using the response of the other op's ear to your advantage. Not entirely ... equal loudness curves show peak sensitivity around 3 KHz independent of sound pressure levels. Human voice has very little energy between 700 Hz and 1200 Hz with most of the power (fundamental energy from the vocal chords) between 200 and 500 Hz with sibilance and unvoiced energy (sounds made with the tongue, teeth and lips) that contribute to "definition" (consonants) in the 1400-4000+ Hz range. The ear needs a balance (although not 1:1 relationship) between lows and highs for best intelligibility. While I do not try for maximum "punch" like K9YC, what he suggests is a good starting point. I don't completely roll off 200 Hz but set it to about -6dB. I also set 800 Hz to -6 or -10 dB which helps eliminate background noise. Then I use a 3 dB/octave rise at the high end: +3 at 1600, +5 at 3400 and +6 at 3200. With the K3 compression engaged, the rise means the highs will be "more dense" (or clipped harder). They will not be any louder than the lows but they will be more pronounced through the noise and *will* contribute to enhanced intelligibility without sounding "rough," "muddy", "tinny" or "narrow". Excessive low frequency response generally causes voices to be muddy. Excessive high frequency energy with too little low frequency response causes voices to sound "tinny" and too much mid-range (excessive low and high cut) causes voices to sound hollow. 73, ... Joe, W4TV On 2014-11-17 2:05 PM, Al Lorona wrote: I'm glad K9YC answered your question. If you heard Jim's signal during the SS this weekend then you got to hear what the shaping he is describing sounded like. His audio was very piercing but clean. It's not what I would want to hear during a long ragchew with him, but his purpose was to project his intelligibility across 40 meters for the purpose of a 30-second contact. Another way to look at this is that our ear is most sensitive to frequencies around 2 kHz (roughly) and so you really want to put as much of your power in that region as you can. In this way, you're using the response of the other op's ear to your advantage. To further paraphrase what Jim said, when it comes to compression, "A little is good, but more is not better," as evidenced by so many shockingly bad signals this weekend. I wish someone would undertake a project to send contesters recordings of themselves. I happened to be listening when a station with especially egregious audio called K9YC, who gave the op a quick but honest report at the end of his exchange. Who knows if that station will heed the advice for the next contest. Al W6LX __ 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 li...@subich.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 KPA500 power on 24/7
Jack, Since Jan 2014, I've left my K3 and P3 on 24/7. The KPA500 I sometimes turn it off, but with the front panel ON switch only. The rear panel power switch I leave alone, so it's always on, except for total power outages. No problems doing it so far. 73, Rick W7LKG -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of w4grj Sent: Monday, November 17, 2014 05:47 To: elecraft@mailman.qth.net Subject: [Elecraft] K3 KPA500 power on 24/7 What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? Jack W4GRJ __ 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 w7...@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] ESSB
I'm glad K9YC answered your question. If you heard Jim's signal during the SS this weekend then you got to hear what the shaping he is describing sounded like. His audio was very piercing but clean. It's not what I would want to hear during a long ragchew with him, but his purpose was to project his intelligibility across 40 meters for the purpose of a 30-second contact. Another way to look at this is that our ear is most sensitive to frequencies around 2 kHz (roughly) and so you really want to put as much of your power in that region as you can. In this way, you're using the response of the other op's ear to your advantage. To further paraphrase what Jim said, when it comes to compression, "A little is good, but more is not better," as evidenced by so many shockingly bad signals this weekend. I wish someone would undertake a project to send contesters recordings of themselves. I happened to be listening when a station with especially egregious audio called K9YC, who gave the op a quick but honest report at the end of his exchange. Who knows if that station will heed the advice for the next contest. Al W6LX __ 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] ESSB
Well put, Al. Thank you. More watts per Hertz! > On Nov 17, 2014, at 10:48 AM, Al Lorona wrote: > > Your intuition is correct, David. The same power in a narrower bandwidth > results in a higher spectral power density -- more watts per Hertz, so to > speak. Not to mention that at the receiving end, the operator can narrow his > bandwidth which lowers the noise floor that he hears underneath you. > > Al W6LX > > > _ > As bandwidth is broadened, is effective radiated power diluted? David Ahrendts, KC0XT > __ > 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 davidahren...@me.com David Ahrendts davidahren...@me.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 KPA500 power on 24/7
On Mon,11/17/2014 5:47 AM, w4grj wrote: What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? If you live in California (escalating rates based on monthly usage), you probably want to turn everything off when you leave the shack to save on your electricity bill. My differential rate is in the range of $0.35 per kWh, and even being frugal, I'm always subject to that rate. Back in Chicago, where I was paying in the range of $0.13 in the summer and a few pennies less in the winter, I left everything on all the time. :) 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 KPA500 power on 24/7
Always on here, I use it remotely too. Rick, WA6NHC iPad = small keypad = typos = sorry ;-) > On Nov 17, 2014, at 10:08 AM, hsherriff wrote: > > Same here > Harlan > NC3C > > Sent from my Verizon Wireless 4G LTE smartphone > > Original message > > > K3, KPA500, KAT500, and P3 are on 24/7 most of the time unless we're > leaving for a day or two. Works for me. > > 73, > > Fred K6DGW > - Northern California Contest Club > - CU in the 50th Running of the 2015 Cal QSO Party 3-4 Oct 2015 > - > __ > 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 happymooseph...@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
Re: [Elecraft] ESSB
Your intuition is correct, David. The same power in a narrower bandwidth results in a higher spectral power density -- more watts per Hertz, so to speak. Not to mention that at the receiving end, the operator can narrow his bandwidth which lowers the noise floor that he hears underneath you. Al W6LX _ >>> As bandwidth is broadened, is effective radiated power diluted? >>> >>> David Ahrendts, KC0XT __ 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] ESSB
On Mon,11/17/2014 10:22 AM, David Ahrendts wrote: In other words, will 500 watts with a 2.6MHz signal be more effective (stronger, punchier, more DBs transmitted) than 500 watts with a 4MHz ESSB signal? Change those MHz to kHz. :) The answer is "YES, MUCH stronger and punchier, more dB transmitted" with limited bandwidth. The difference is roughly one S-unit. A big part of the difference comes not from the high end, but from the low end. For best communications quality, go to TXEQ and set the three lowest bands for maximum cut, set the fourth band (400 Hz) to -6dB cut, and get signal reports. For most ham mics and voices, leave the rest of the bands flat. For mics or voices that sound a bit dull or deep, boost the top two bands by 3-6 dB. Professional mics will require more boost on the high end. We can also increase our talk power by using the compression built into the K3. Set it so that you see no more than 6-10 dB compression on peaks, using the compression display. 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] ESSB
Yes, KHz, of course. Didn’t have the courage to consume 4KHz :—) but I did answer the Elecraft net call at 1800z at 3KHz. > On Nov 17, 2014, at 10:29 AM, Phil Wheeler wrote: > > I think you meant KHz, not MHz, David :-) > > My thinking is that the narrower "communications quality" signal would be > more effective. > > How did you find 4KHz with none of those contesters on it? Incredible > accomplishment! > > 73, Phil W7OX > > On 11/17/14 10:22 AM, David Ahrendts wrote: >> Experimented yesterday for a few minutes with ESSB (carefully avoiding >> weekend contesters), and it raised a fundamental question: As bandwidth is >> broadened, is effective radiated power diluted? In other words, will 500 >> watts with a 2.6MHz signal be more effective (stronger, punchier, more DBs >> transmitted) than 500 watts with a 4MHz ESSB signal? >> >> David Ahrendts, KC0XT >> >> >> >> David Ahrendts davidahren...@me.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 davidahren...@me.com David Ahrendts davidahren...@me.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] ESSB
I think you meant KHz, not MHz, David :-) My thinking is that the narrower "communications quality" signal would be more effective. How did you find 4KHz with none of those contesters on it? Incredible accomplishment! 73, Phil W7OX On 11/17/14 10:22 AM, David Ahrendts wrote: Experimented yesterday for a few minutes with ESSB (carefully avoiding weekend contesters), and it raised a fundamental question: As bandwidth is broadened, is effective radiated power diluted? In other words, will 500 watts with a 2.6MHz signal be more effective (stronger, punchier, more DBs transmitted) than 500 watts with a 4MHz ESSB signal? David Ahrendts, KC0XT David Ahrendts davidahren...@me.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] Tuner
On Mon,11/17/2014 6:14 AM, David Cole wrote: Hi all, I am considering the Elecraft KAT500K tuner for my station... I run around 1K to 1.5K for SSB, and 500 to 750 for RTTY/Digital. Is this pushing the Elecraft too far? I'm using a pair in my SO2R station that I run legal limit. My antennas are all fairly well matched. When the KAT500 doesn't like the load or the power, it faults to protect itself. If you're a reasonably technical guy who won't expect the tuner to do things it cannot do, I think you'll be very happy. I am. As Don has said, it won't let you run high power to a badly matched load. The KAT500 has three outputs, and the firmware remembers settings for each on each band (and even multiple frequencies on a band). Like the KPA500 (which I use when not contesting), all it takes is a dit or a bang on the mic to change bands and recall settings. I use no band data for either unit, and only PTT for the KPA. 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
[Elecraft] ESSB
Experimented yesterday for a few minutes with ESSB (carefully avoiding weekend contesters), and it raised a fundamental question: As bandwidth is broadened, is effective radiated power diluted? In other words, will 500 watts with a 2.6MHz signal be more effective (stronger, punchier, more DBs transmitted) than 500 watts with a 4MHz ESSB signal? David Ahrendts, KC0XT David Ahrendts davidahren...@me.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] K1
Dave, When the K1 detects a 2 band board, it will only show b1 and b2. You will have to set those two parameters each time you change the board. The frequency offsets are remembered for each band, so unless there is a duplication of a band between the two boards, you will not have to change the offsets. 73, Don W3FPR On 11/17/2014 1:06 PM, w1dwz w1dwz wrote: Thanks to all who have helped me here on the Reflector , maturing as a ELECRAFT "Newbie " One more query. Using ( 2 )2 -channel filter boards , instead of the 4 channel board which is no longer available , I am confused as to how to configure the channel #'s of them. It seems to me that each board should be set up with b1 and b2 on each boardand not b1 , b2 on one board , and b3 , and b4 on the other .Is that a good assumption ? the manual is a little sketchy on this. __ 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 KPA500 power on 24/7
Same here Harlan NC3C Sent from my Verizon Wireless 4G LTE smartphone Original message K3, KPA500, KAT500, and P3 are on 24/7 most of the time unless we're leaving for a day or two. Works for me. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the 2015 Cal QSO Party 3-4 Oct 2015 - __ 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] K1
Thanks to all who have helped me here on the Reflector , maturing as a ELECRAFT "Newbie " One more query. Using ( 2 )2 -channel filter boards , instead of the 4 channel board which is no longer available , I am confused as to how to configure the channel #'s of them. It seems to me that each board should be set up with b1 and b2 on each boardand not b1 , b2 on one board , and b3 , and b4 on the other .Is that a good assumption ? the manual is a little sketchy on this. Dave W1DWZ __ 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 KPA500 power on 24/7
K3, KPA500, KAT500, and P3 are on 24/7 most of the time unless we're leaving for a day or two. Works for me. 73, Fred K6DGW - Northern California Contest Club - CU in the 50th Running of the 2015 Cal QSO Party 3-4 Oct 2015 - www.cqp.org On 11/17/2014 5:47 AM, w4grj wrote: What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? Jack W4GRJ __ 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] Tuner
What antenna will you be using, David? Phil W7OX On 11/17/14 6:14 AM, David Cole wrote: Hi all, I am considering the Elecraft KAT500K tuner for my station... I run around 1K to 1.5K for SSB, and 500 to 750 for RTTY/Digital. Is this pushing the Elecraft too far? I am looking at an LDG AT-1000 PROII, and the Elecraft KAT500K right now as the two possible candidates. Palstar would be nice, but too expensive. Any other suggestions? Looking for general input and want your feelings if you have used both, or thoughts you might have on the two as a comparison point prior to purchase. __ 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] LCD swap ?
Sorry! somehow this got sent to the wrong place. Please excuse. John at KB0NE, amateur radio station __ 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] LCD swap ?
Hi, Was wondering if the LCD-00709 (White on Black) LCD display unit is electrically pin for pin compatible with the LCD display that is used on the LCD Button Shield DEV-11851?I want to swap the LCD display panels since the white on black display would look a lot better in the project that I'm thinking about (rather than dark grayish on green). Thanks John at KB0NE, amateur radio station *"Extraordinary claims require extraordinary evidence"Carl Sagan * __ 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] Tuner
David, It all depends on the SWR the tuner has to handle rather than the mode. If you look at the specifications you will find that the KAT500 will handle 1000 watts over a 3:1 SWR range (600 watts over a 10:1 SWR range) - and that is from 3 to 30 MHz. At the 1.8 to 2 MHz frequency range, the 600 watt level is reduced to a 5:1 SWR for low impedances (still 10:1 for high impedances). At 1000 watts the rating is still for a 3:1 SWR over an impedance range of 16 to 150 ohms. So the real answer depends on your required antenna tuning range. Will it work at levels exceeding the specifications? It may, but it may exceed the maximum voltage of the capacitors and/or the maximum current of the inductors. In other words, operation beyond the limits of the specifications is at your own peril. Examine the impedance of your antennas and then you can determine the answer for your station. 73, Don W3FPR On 11/17/2014 9:14 AM, David Cole wrote: Hi all, I am considering the Elecraft KAT500K tuner for my station... I run around 1K to 1.5K for SSB, and 500 to 750 for RTTY/Digital. Is this pushing the Elecraft too far? I am looking at an LDG AT-1000 PROII, and the Elecraft KAT500K right now as the two possible candidates. Palstar would be nice, but too expensive. Any other suggestions? Looking for general input and want your feelings if you have used both, or thoughts you might have on the two as a comparison point prior to purchase. __ 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] Tuner
Hi all, I am considering the Elecraft KAT500K tuner for my station... I run around 1K to 1.5K for SSB, and 500 to 750 for RTTY/Digital. Is this pushing the Elecraft too far? I am looking at an LDG AT-1000 PROII, and the Elecraft KAT500K right now as the two possible candidates. Palstar would be nice, but too expensive. Any other suggestions? Looking for general input and want your feelings if you have used both, or thoughts you might have on the two as a comparison point prior to purchase. -- Thanks and 73's, For equipment, and software setups and reviews see: www.nk7z.net for MixW support see; http://groups.yahoo.com/neo/groups/mixw/info for Dopplergram information see: http://groups.yahoo.com/neo/groups/dopplergram/info for MM-SSTV see: http://groups.yahoo.com/neo/groups/MM-SSTV/info __ 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 KPA500 power on 24/7
What are opinions of leaving my K3 and KPA500 on 24/7 or should they be powered on and off for daily use? Jack W4GRJ __ 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
