[Elecraft] K2 s/n 4886 assembled
Hi: No doubt this is old hat to some 5000 of you out there, but I have just made it to the end of Chapter 7, so consider this one built. The first thing that ever popped up on my display was INFO 80, and there were times when I wondered if I might turn 80 before reaching page 80. But I did it, and I owe a debt of gratitude to those (you know who you are) who responded to my queries, both on and off list. Hey, this kit comes with a great instruction manual. But as the saying goes, you can't learn everything by just reading a book. I have a few things to do, such as build the options. And, more to the point, the CW test to get HF privileges. So for the time being, s/n 4886 lets me do little more than hone my listening skills. Which probably isn't such a bad thing in the long haul. Armed with my experience, and a whole lot more confidence, I will now turn my attention to completing s/n 3460, which has proven to be a bit of a problem child. Regardless, I'm having fun and learning lots. Hats off to the collective genius that kept me going in the right direction. jh, VE8JJ ___ 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] For SSB op's only, T/R delay K2
[EMAIL PROTECTED] wrote: When you release the PTT switch, do you hear audio instantly or is there a small delay. As a comparison, there is virtually no delay when I use my ICOM radio. On S/N 1641 there is no perceptable delay whatsoever. Perhaps you might want to check stuff in the AGC section? 73 de Maggie K3XS -- -/___. _)Margaret Stephanie Leber CCP, SCJP/The art of progress / /(, /| /| http://voicenet.com/~maggie SCWCD/ is to preserve order/ ---/ / | / | _ _ _` _ AOPA 925383/ amid change and to / --/ ) / |/ |_(_(_(_/_(_/__(__(/_ K3XS / preserve change amid/ -/ (_/ '.-/ .-/ARRL 39280 /order.-A.N.Whitehead/ /(_/_(_/___AMSAT 32844_/[EMAIL PROTECTED]/ ___ 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] KIO2 noise and remote PA
Thanks, Lyle, Yes, I have K2 #1013 - lucky 13. I'm sure I bought the KIO2 as soon as it came out. I'll check the crystal fequency tonight. Isn't there also a KIO2 in my remote PA? That one is probably the newer crystal? Sam N4MAP ___ 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] For Sale
Since I have the K2/100 I have no need for the old top cover. This is complete with KIO2 ($89 kit price), KAT2 ($159 kit price), KBT2 ($67 price), with speaker and of course the cover itself. All ready to plug in and operate. This is a $300+ value (not counting assembly time) for $225. Save time and money with this unit. In excellent physical and electronic condition. Contact me off list please. Larry Walker KW4A K2 Ser# 811 (423)365-4460 www.LaserLarry.com ___ 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] G00 G31
Hi Chuck. I had changed the connector and redid the joints and put fresh and voltage checked alkaline batteries. I was at 2.2 watts. r1.1 at 14060 as planned and yes you heard the call right it is KB7DPC but I heard nothing, that space on the dial was completely quiet. But a little later that evening I noticed that 14058 area was very busy with several fast code. There are fires in the mountains but I don't think smoke interferes with transmission. I am guessing that since you heard me you are about 1200 miles away so I can see how just a couple of watts can work. At the HAM contest most guys commented that life is too short to go without a kilowatt. Every one there had transceivers of 100 watts, so I pretty amazed with what a couple of watts can do. Ok lets talk filter. I have been using the filter this way, all the way to 2.0 when searching for signals and all the way to 0.5 when sending. Is the filter in the circuit when sending I thought it would be in the circuit only when receiving. RIT, still not sure even though reading several items on this one. but I have turned the RIT to OFF, when should it be turned on. MC -- KB7DPC Mike, I heard your CQ on 14,060 at 0108 GMT (2008 CST or 2108 Eastern). The band was fading in and out pretty bad I cranked up power to about 50 watts to give you a reply. I sure hope it was not wishful thinking but I copied KB7DPC. I copied you at about 439 to 559 depending on how the band was at the time of your call. If you did not hear me reply you may have your band filter set too narrow. I normally have my filter set to 2.0 unless the band is really crowded, then as I continue the QSO I may narrow the filter a bit as I fine tune. Normally .75 to1.0 on my filter is fine. I leave my RF gain all the up all the time and only adjust the AF Gain a little bit during the QSO , to a comfortable listening level. When folks reply there is no real guarantee that they will be zerod on your exact freq. Plus the KX1 has a hard wired 600Hz Transmit Offset, so if the filter is too narrow and you have not turned on the RIT offset you may not be hearing the replies. Man don't ask me how all this RIT XIT stuff works or how to set it cause I don't know.. I just know it is there and try to work with it. Someday when I can get a Eyeball QSO with some of these really big time Elmers like W3FPR Don Wilhelm or N0SS Tom Hammond, I will pay them to give me a class on setting my RIT, for now work around it. I would have hung on the air longer and tried to catch you on 7060. But Thunderstorms rolled into the area and I had to shut down. We are almost there hand in there buddy we are going to make this work. Your CW speed and spacing sounded pretty good easy copy except for the QSB (fading) As far as your question about the KXAT1 improving reception. It is my understanding that the tuner is trying to match the impedance of the antenna to your radio by using CAP and inductors, in effect electronically lengthing or shortening the antenna for a match. The better the match the better the reception. If you got a reply that says something different I would like to see it. 73 KI4DGH Chuck Gehring -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of mc Sent: Tuesday, June 28, 2005 9:53 AM To: elecraft@mailman.qth.net Subject: [Elecraft] G00 G31 with the KXAT1 installed, what does this feature actual do to make receive better. ___ 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 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] Battery vs Ultracapacitor
At 11:18 PM 6/27/2005, Kevin Rock wrote... If I have done this correctly you should be able to run a QRP rig key down for approximately 14 minutes with a fully charged 5K Farad ultracapacitor. Discharge curves vary significantly between caps and batteries. Caps discharge exponentially, and the voltage would drop to an unusable level rather quickly. Chemical batteries have a much flatter discharge curve, and much more of the available power is therefore useful. More of the available power in a cap could be used with active voltage regulation (step-up), but that would bring further inefficiencies into play. Mike Sauve W8UR ___ 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] Back to the Future - Morse Code and Cellular Phones
Published on The O'Reilly Network (http://www.oreillynet.com/) http://www.oreillynet.com/pub/wlg/7016 Back to the Future - Morse Code and Cellular Phones by Brian McConnell Jun. 28, 2005 I've spent most of the past five or so years thinking about handheld devices, their limitations and how to work around them. Having worked with telephones since I was in high school, this has been something of an obsession. The hot trend today is to cram every feature imaginable into mobile telephone handsets. This has led to some cool things like camera phones, mobile gaming, and such. The problem is that a lot of designers overlook some basic limitations in these devices, and more importantly, the situations in which people use them. Cellular phones are all about mobility. Good mobility applications recognize that the user is often in motion (walking, driving, etc). Safety and convenience require that the application should demand as little visual attention as possible. Badly designed applications force the user to stare at the telephone's display instead of paying attention to surrounding environs. This is why speech user interfaces work so well for mobile users. They allow the user to interact with a service in a heads up stance, without looking at the phone. Unfortunately, most mobile applications are of the badly designed let's take a PC interface and shrink it down category. Text messaging is an enormously popular service, but it too suffers from this basic user interface conflict. Sending and receiving text messages requires the user to look at the display. Receiving messages can be done at a glance, so this is not such a burden. Sending them is another story. Some people are adept at tapping messages on numeric keypads, but doing so requires the user to pay attention to the display. Try writing a text message without looking at the phone. Not easy. Tapping Morse Code, or a derivative of it, could be one way to solve this problem. With Morse Code, one could tap text messages out without looking at the telephone, and without having to fumble with ever smaller keypads. I'll admit that the idea of resurrecting Morse Code seems improbable, but then it's worth remembering that only a few years ago, the idea of people typing with their thumbs also seemed absurd. How might Morse be incorporated into a telephone handset. I sketched out a fairly simple interface. Here's what I came up with. The telephone would have a fairly large pressure sensitive panel on its back side, big enough that you would not have to look at the phone to locate it. It might also be possible to use the telephone's existing microphone to sense taps (although discriminating between short and long pulses could be a problem). You'd send messages in a couple of different ways depending on how you were carrying the phone at the time. I devised a couple of tweaks to make the process of sending messages faster. When carrying the phone at your side, you could send messages with one hand by tapping on the back of the phone in the convention dot (short) and dash (notation). The panel would interpret a brief pulse as a dot, a longer pulse as a dash. Timing is important, so this method of sending messages takes more practice. With both hands free or with the phone resting on a surface, you could use a slightly different method to tap messages. Holding the phone in one hand and tapping with the other, you'd tap the panel with your fingernail to send a dot, and with your whole fingertip to send a dash. Timing is much less important here, so this method will be easier for people to learn. Receiving messages is less of an issue, since they'll arrive as text messages. The sending telephone will convert the tapped dots and dashes into alphanumeric messages to be sent via SMS or IP. The receiving telephone will display these in the usual way (an option to play messages via text to speech synthesis would be a nice add-on, and as mobile phones become more powerful, should be easy enough to do). Hands-Free Mobile Phone Features Incorporating a Morse Code key into the back of a telephone handset has other uses besides tapping text messages. One of the things this enables you to do is to make it easier to control a telephone in hands-free mode. For example, you could design the phone so that it recognizes certain codes as keypad commands, primarily for deciding how to deal with incoming calls. .. = answer call ... = send call to voice mail = forward call to preprogrammed number So while you're driving along, you could dispatch incoming calls as desired by tapping on the back of the handset, something you could do heads up, without taking your eyes off the road. While this isn't Morse Code per se, it's the same idea, and it should be easy to train users to learn a handful of short two or three digit codes as in the example above. This is probably more realistic
Re: [Elecraft] KIO2 noise and remote PA
On Jun 29, 2005, at 5:13 AM, Sam Smith wrote: Thanks, Lyle, Yes, I have K2 #1013 - lucky 13. I'm sure I bought the KIO2 as soon as it came out. I'll check the crystal fequency tonight. The KIO2 uses a crystal frequency of 16.289 MHz. It has NOT been changed since the unit's inception. The KRC2 uses the same crystal. Isn't there also a KIO2 in my remote PA? That one is probably the newer crystal? The KPA100 has a voltage generator that uses an 18.432 MHz crystal. This one _has_ been changed since the original kit. The original frequency was also 16.289 MHz. It might be interesting to change the KIO2's crystal to 18.432 to see if the spurs you are encountering go away (or get moved to somewhere less interesting). - Jack Brindle, W6FB - ___ 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] Back to the Future - Morse Code and Cellular Phones
Some good thoughts. Morse Code is MORE than just sequences of 'dots' and 'dashes' (dits and dahs if you will!) What is also VERY important is 'timing'. if I send 'as' 'kin' 'g' instead of 'asking' or a word like 'yes' 'terd' 'ay' instead of 'yesterday' it has a great chance to become misunderstood or garbled. Morse has a definite beat like music, or you could say a cadence that must be kept up with if it is to be easily understood. I observe a lot of very disconnected words being sent nowadays that makes the code much more difficult to decode in the head. ESPECIALLY when one begins to copy whole syllables and/or words. The whole concept sounds very practical. Something you can do without l ooking at a keyboard too! 73, Sandy W5TVW - Original Message - From: Margaret Leber [EMAIL PROTECTED] To: Elecraft Elecraft@mailman.qth.net Sent: Wednesday, June 29, 2005 10:50 AM Subject: [Elecraft] Back to the Future - Morse Code and Cellular Phones | Published on The O'Reilly Network (http://www.oreillynet.com/) | http://www.oreillynet.com/pub/wlg/7016 | | Back to the Future - Morse Code and Cellular Phones | by Brian McConnell | Jun. 28, 2005 | | I've spent most of the past five or so years thinking about handheld | devices, their limitations and how to work around them. Having worked | with telephones since I was in high school, this has been something of | an obsession. | | | The hot trend today is to cram every feature imaginable into mobile | telephone handsets. This has led to some cool things like camera phones, | mobile gaming, and such. The problem is that a lot of designers overlook | some basic limitations in these devices, and more importantly, the | situations in which people use them. | | | Cellular phones are all about mobility. Good mobility applications | recognize that the user is often in motion (walking, driving, etc). | Safety and convenience require that the application should demand as | little visual attention as possible. Badly designed applications force | the user to stare at the telephone's display instead of paying attention | to surrounding environs. This is why speech user interfaces work so well | for mobile users. They allow the user to interact with a service in a | heads up stance, without looking at the phone. Unfortunately, most | mobile applications are of the badly designed let's take a PC interface | and shrink it down category. | | | Text messaging is an enormously popular service, but it too suffers from | this basic user interface conflict. Sending and receiving text messages | requires the user to look at the display. Receiving messages can be done | at a glance, so this is not such a burden. Sending them is another | story. Some people are adept at tapping messages on numeric keypads, but | doing so requires the user to pay attention to the display. Try writing | a text message without looking at the phone. Not easy. | | | Tapping | | | Morse Code, or a derivative of it, could be one way to solve this | problem. With Morse Code, one could tap text messages out without | looking at the telephone, and without having to fumble with ever smaller | keypads. I'll admit that the idea of resurrecting Morse Code seems | improbable, but then it's worth remembering that only a few years ago, | the idea of people typing with their thumbs also seemed absurd. | | | How might Morse be incorporated into a telephone handset. I sketched out | a fairly simple interface. Here's what I came up with. | | | The telephone would have a fairly large pressure sensitive panel on its | back side, big enough that you would not have to look at the phone to | locate it. It might also be possible to use the telephone's existing | microphone to sense taps (although discriminating between short and long | pulses could be a problem). | | | You'd send messages in a couple of different ways depending on how you | were carrying the phone at the time. I devised a couple of tweaks to | make the process of sending messages faster. | | | When carrying the phone at your side, you could send messages with one | hand by tapping on the back of the phone in the convention dot (short) | and dash (notation). The panel would interpret a brief pulse as a dot, a | longer pulse as a dash. Timing is important, so this method of sending | messages takes more practice. | | | With both hands free or with the phone resting on a surface, you could | use a slightly different method to tap messages. Holding the phone in | one hand and tapping with the other, you'd tap the panel with your | fingernail to send a dot, and with your whole fingertip to send a dash. | Timing is much less important here, so this method will be easier for | people to learn. | | | Receiving messages is less of an issue, since they'll arrive as text | messages. The sending telephone will convert the tapped dots and dashes | into alphanumeric messages to be sent via SMS or IP. The receiving | telephone will display these in the
[Elecraft] O.T. Datong FL3.
Hello Everyone! Just wondering, if, amongst all the expertise stored info amongst Elecraft list members, anybody has a schematic, or any other info on the Datong FL3 Audio Filter. These were made in England back in the 1980s I think that Datong is now out of business. Plan on using it with my 2 x K2s (0681 2681). Thanks 73 de Mike, zl1mh. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.7/34 - Release Date: 29/06/2005 ___ 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] RE: K2 and KPA 100- How Is Hi Current Generated
Hi Jim, Good question. While I have been troubleshooting the KPA I have left the KAT100 out of circuit - I don't need it while transmitting into a dummy load. The AT-200 has a straight through mode for power measurement that I am using. I only borrowed the AT-200 for power meter as the KAT100 is excellent :). Mike VK1KCK K2 #2599 -Original Message- From: k4zm [mailto:[EMAIL PROTECTED] Sent: Wednesday, 29 June 2005 9:44 AM To: Mike Walkington Subject: Re: [Elecraft] RE: K2 and KPA 100- How Is Hi Current Generated Don: Do you have the Kenwood AT-200 installed between the KPA100 and the KAT100 or beween the KAT100 Output and the antenna? If connected on the output of the KAT100 you cannot expect to see an accurate SWR/POWER indication on the AT-200. 73 Jim Younce K4ZM K2 SN: 18 ___ 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] 1) K2 with end fed antenna, 2) N-balun
After installing end fed long wire 26.5m antenna few meters higher situation become even worse in 15m and 12m. 15m: K2 is giving _only_ 2 or 3 watts output! 12m: when pressing TUNE, K2 will switch immediately to receive mode. Is this a symptom of a) a big impedance or b) RF in the shack-problem. Does the K2 has some kind of protection. I suspect SG231 autotuner cannot tune the antenna in those bands and SWR in the feedline between the K2 and auto tuner is big. Could this cause K2 to switch to receive? K2 will give normal output to dummy load. Second topic, do you have dealers in USA who are selling baluns for dipole antennas which are supplied with N connectors? I cannot find them from Finland. If you know, please let me know the dealer, privately. Rolf Moberg ___ 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] O.T. Datong FL3.
Datong (www.datong.co.uk) are now in the surveillance business. Unfortunately they never released schematics for their amateur products and often ground off the part numbers from the chips. Mike wrote: Hello Everyone! Just wondering, if, amongst all the expertise stored info amongst Elecraft list members, anybody has a schematic, or any other info on the Datong FL3 Audio Filter. These were made in England back in the 1980s I think that Datong is now out of business. Plan on using it with my 2 x K2s (0681 2681). Thanks 73 de Mike, zl1mh. -- Nigel A. Gunn. 59 Beadlemead, Milton Keynes, MK6 4HF, England. Tel +44 (0)1908 604004 e-mail [EMAIL PROTECTED] or [EMAIL PROTECTED] wwwhttp://www.ngunn.net or http://www.ngunn.demon.co.uk Amateur radio stations G8IFF, KC8NHF Member of AMSAT-UK #182, ARRL, GQRP Club, QRPARCI, SOC #548 RAYNET Flying Pig #385, Dayton ARA #2128, AMSAT-NA LM-1691, ___ 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] 1) K2 with end fed antenna, 2) N-balun
Rolf, Are you using a counterpoise with that end fed? If you aren't try one. If you already are try raising it off the ground a bit. Tom WB2QDG K2 1103 -- Original message -- From: Rolf Moberg, OH6KXL [EMAIL PROTECTED] After installing end fed long wire 26.5m antenna few meters higher situation become even worse in 15m and 12m. 15m: K2 is giving _only_ 2 or 3 watts output! 12m: when pressing TUNE, K2 will switch immediately to receive mode. Is this a symptom of a) a big impedance or b) RF in the shack-problem. Does the K2 has some kind of protection. I suspect SG231 autotuner cannot tune the antenna in those bands and SWR in the feedline between the K2 and auto tuner is big. Could this cause K2 to switch to receive? K2 will give normal output to dummy load. Second topic, do you have dealers in USA who are selling baluns for dipole antennas which are supplied with N connectors? I cannot find them from Finland. If you know, please let me know the dealer, privately. Rolf Moberg ___ 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 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] O.T. Datong FL3.
Actually, Mike, I think I've seen mention of Datong in recent years. Not totally dead yet. Dr. D. A. Tong was a very clever designer, but he kept his designs very close to his chest. To the best of my knowledge, the schematics for the FL3 or others were never published. I too have an FL3 and would like to see the schematic, but no joy so far. 73, Bob N6WG -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Mike Sent: Wednesday, June 29, 2005 11:38 AM To: Elecraft Reflector Subject: [Elecraft] O.T. Datong FL3. Hello Everyone! Just wondering, if, amongst all the expertise stored info amongst Elecraft list members, anybody has a schematic, or any other info on the Datong FL3 Audio Filter. These were made in England back in the 1980s I think that Datong is now out of business. Plan on using it with my 2 x K2s (0681 2681). Thanks 73 de Mike, zl1mh. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.8.7/34 - Release Date: 29/06/2005 ___ 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 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] whips
CB Channel 19 is 27.185 MHz and if the KTAT1 tuner has sufficient matching capability you could probably easily hit 12 or 10 meters. it might even give 15 a shot. The SGC tuner works quite well on 102 whip and the range is 80 up to 6 meters but it has an extremely wide matching range. I am not familiar with the characteristics of the KTAT1 but it won't hurt anything to try it. - Original Message - From: mc [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Wednesday, June 29, 2005 5:08 PM Subject: [Elecraft] whips If you have a KX1 with the KTAT1-antenna tuner ,, does anyone know if and how good an antenna from Marine VHF transceiver would be, the kind that sits on top of a cabin roof, -- or a CB truck antenna it would be the kind in those trucks parts catalogs. Both of these types come with strong support brackets and use coax but both are grounded to the negative system battery. don't know the frequency that either VHF Marine or CB radios use. Mike ___ 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 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] whips
Check the base impedance at hf. Some antennas have a vhf matching circuit in the base that will look like nearly a short at hf. If it doesn't show an open circuit at hf, it will probably be very difficult to match at hf. Good luck and 73 Bob N6WG -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Stuart Rohre Sent: Wednesday, June 29, 2005 4:05 PM To: mc; elecraft@mailman.qth.net Subject: Re: [Elecraft] whips Since the Marine band is 150 MHz VHF range, its matched antenna would not make a good HF antenna. However, with a tuner it might tune up on some ham bands with some undefined pattern of takeoff depending on where the loading coils for VHF are located on the Marine mast. Stuart K5KVH ___ 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 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] whips
In a message dated 29/06/05 23:50:28 GMT Daylight Time, [EMAIL PROTECTED] writes: Check the base impedance at hf. Some antennas have a vhf matching circuit in the base that will look like nearly a short at hf. If it doesn't show an open circuit at hf, Reply:- What Bob, N6WG mentions are the VHF antennas that are 1/2 wavelength or multiples of this and where the antenna feed end is at a high impedance. To match this a coil is inserted into the antenna base with the incoming 50 ohm feeder tapped in at an early point on the coil. Normally this type can be located even with a sealed marine type antenna by checking the resistance across the unplugged antenna lead should read S/C looking towards the antenna. This type of VHF antenna should not be capable if working on HF. However if there is no measurable S/C there is a good chance the antenna is one that is a multiple of a 1/4 wavelength and as such could be used as a short whip antenna for HF, though with rather limited efficiency. Bob, G3VVT ___ 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] KIO2 noise and remote PA
I found a 16.9xx crystal on an old computer board and swapped it out. Now the birdie has moved somewhere else. My other choice was 16.670 but I figured that would wind up in the 6 meter band... Thanks everyone for the help. Sam N4MAP ___ 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] O.T. Datong FL3.
In a message dated 29/06/05 21:50:12 GMT Daylight Time, [EMAIL PROTECTED] writes: Actually, Mike, I think I've seen mention of Datong in recent years. Not totally dead yet. Dr. D. A. Tong was a very clever designer, but he kept his designs very close to his chest. To the best of my knowledge, the schematics for the FL3 or others were never published. I too have an FL3 and would like to see the schematic, but no joy so far. 73, Bob N6WG Reply:--- As Nigel mentions in an earlier posting, Datong Ltd are still very much in business in more upmarket RF tracking equipment sold to government agencies. I did contact the company recently trying to obtain a schematic for their earlier Datong DF1 FM direction finding unit that was marketed in the mid 1980's. I have obtained one of these items to help in the tracking an interfering signal (moron) on the input to our local 2m repeater. Unfortunately the antenna combiner part of the DF1 had got lost over the years, so the only option was to build another to get the DF1 working. Contacted Datong via their website listed address and though they were initially willing to help, became unable to do so when a schematic was requested. Only suggestion they made was to post a request for help in Radcom or similar. Never have seen any of their schematics available so possibly none were ever given out. I traced out a schematic for their AD170/AD270 active RX antenna from the PCB as a necessity to repair the unit after it got zapped by static electric during my years in the Middle East. Other than having a go yourself to trace out the schematic from the FL3 PCB, it may be worth contacting Datong via their website address to see if they will help with the FL3 schematic. As a footnote did finally find a project unit that was very similar and compatible to the Datong DF1 that had the schematics available plus the necessary blank PCBs. In process of constructing this unit at present. Bob, G3VVT ___ 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] Ser 4993 - First Problem
Well, everything went well until it was time to apply power for the first time :) All resistance checks were as they should have been to this point Applied power for the first time: heard the relays engage backlight came on Display is blank, nothing whatsoever in the display turned rig off and back on, no relays this time, but still nothing in the display Doesn't appear to accept any button pushes at all, band +/- does nothing, as well as display, menu, etc good news is no smoke (yet) Not sure if it's significant or not, but the display seems to flicker slightly, with the desk lamp off, it is noticeable I've taken the boards out and rechecked all connections, etc, I can not see anything obvious... Any suggestions?? Thanks Tim NZ8J ___ 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] K1: RF gain and RIT controls
I'm finally going to open the box I've had for 2 years and build a K1 so I'll have a rig for the Australian outback next month! Before I start, a couple of questions: 1. Has anyone come up with a good RF gain control, aka AGC threshold control? Please, no lectures about how the K1 doesn't need it, or how the RF attenuator works great. 2. In searching the archives, I found hundreds of posts about the RIT range. Too many to sort through. Is the mod in the manual the best and simplist for reducing the RIT range, or was there a definitive posting of a better one? While I'm at it, is there a drop-in replacement for the RIT control that has a center detent? Thanks! -Bruce AA5B ___ 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] K1 Tuning Range Quandary
Good Evening All K1-4 Owners, Construction of the K1 itself starts tomorrow evening after work! When I got my K1, I opted for the 4-band radio as primary, and I purchased the two-band module extra. For my four-band I chose: 40-30-20-15. I have 80 17 for the two band module. It is starting to become decision time for me, and I am in a quandary. Do I choose 80 or 150 KHz as my tuning range? I know the manual says that if you are building a four-band radio (Which I am), you should choose the 80 KHz tuning range. However, I am wondering how much coverage/bandwidth I am losing/missing out on if I do choose 80 KHz. With the 10-turn potentiometer, it means approximately 8 or 15 Khz per revolution of the knob. I'd like to poll all K1 owners out there and see WHAT you chose and, more importantly, WHY. I'd also like to know HOW you feel about the decision since you have had a chance to use your rig. If Eric or Wayne is reading this post, I'd really like to hear your thoughts as well. The last thing I want to do is go back in and change the bandwidth once it is built. Those thru-hole connections are tough to desolder! I thank you all in advance for your input. 73, David A. Dietrich KC9EHQ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ 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] K1 Tuning Range Quandary
It's only a matter of what you like, David. I built it for 150K bandspread, and thought the tuning was way too fast for me. Most of my operating is near the QRP and FISTS frequencies and in the first 10 khz of 40, 20 and 15. On 30 I never go below 10.100 and I never go above 10.120. So I give up nothing and I gain smoother, slower tuning. If that isn't your operating style, pick the option that is. It is a very simple matter to change it later if you don't like it, so pick one based on what YOU are looking for, try it for awhile, then try the other if you are not satisfied. It's just not a big deal. There is no decision time with Elecraft products as long as you plan on keeping your soldering iron. Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David Dietrich Sent: Wednesday, June 29, 2005 7:54 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K1 Tuning Range Quandary Good Evening All K1-4 Owners, Construction of the K1 itself starts tomorrow evening after work! When I got my K1, I opted for the 4-band radio as primary, and I purchased the two-band module extra. For my four-band I chose: 40-30-20-15. I have 80 17 for the two band module. It is starting to become decision time for me, and I am in a quandary. Do I choose 80 or 150 KHz as my tuning range? I know the manual says that if you are building a four-band radio (Which I am), you should choose the 80 KHz tuning range. However, I am wondering how much coverage/bandwidth I am losing/missing out on if I do choose 80 KHz. With the 10-turn potentiometer, it means approximately 8 or 15 Khz per revolution of the knob. I'd like to poll all K1 owners out there and see WHAT you chose and, more importantly, WHY. I'd also like to know HOW you feel about the decision since you have had a chance to use your rig. If Eric or Wayne is reading this post, I'd really like to hear your thoughts as well. The last thing I want to do is go back in and change the bandwidth once it is built. Those thru-hole connections are tough to desolder! I thank you all in advance for your input. 73, David A. Dietrich KC9EHQ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ___ 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 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: K1 Tuning Range Quandary
On Jun 29, 2005, at 7:54 PM, David Dietrich wrote: It is starting to become decision time for me, and I am in a quandary. Do I choose 80 or 150 KHz as my tuning range? David, I can't speak for others, but I can explain the reasoning I used when I wrote the manual. First, 99% of CW activity occurs in the first 80 kHz of all bands covered by the K1. Second, covering a smaller range results in finer tuning resolution. When we first designed the K1 there was a reasonable amount of activity from 7100-7150 and 21100-21150. This is the main reason we offered a wider tuning-range option. Activity in these segments is now fairly sparse, with the exception of some gatherings near 7145 that I've heard about, so for the average builder I'd recommend 80 kHz. 73, Wayne N6KR --- http://www.elecraft.com ___ 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] K1 Tuning Range Quandary
David, Go with 80 kHz. I went with 150 and I think I am going to change it. 150 Khz makes tuning just a bit skittish. I can live with it; but when I have some time, I think I am going to change it. 73 de Larry W2LJ ___ 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] K1: RF gain and RIT controls
I soldered a 10K resistor across the RIT pot and magically cut the range in half. It was easier than dealing with C7 on the rf board. I find RIT=Off a satisfactory center detent. Per your request, I'll spare you my comments on the gain control as the K1 doesn't need one. Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, June 29, 2005 7:51 PM To: Elecraft@mailman.qth.net Subject: [Elecraft] K1: RF gain and RIT controls I'm finally going to open the box I've had for 2 years and build a K1 so I'll have a rig for the Australian outback next month! Before I start, a couple of questions: 1. Has anyone come up with a good RF gain control, aka AGC threshold control? Please, no lectures about how the K1 doesn't need it, or how the RF attenuator works great. 2. In searching the archives, I found hundreds of posts about the RIT range. Too many to sort through. Is the mod in the manual the best and simplist for reducing the RIT range, or was there a definitive posting of a better one? While I'm at it, is there a drop-in replacement for the RIT control that has a center detent? Thanks! -Bruce AA5B ___ 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 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
