Re: [Elecraft] NorCal Doublet
To avoid the joint in the middle, I've used the all-copper ladderline, ie not the copper coated steel variety, it's a lot smaller and lighter, I think it is supposed to be 450ohm (correct me if I'm wrong) it's about 10mm wide, light grey. I like the fishing swivel idea attached to the ring in the end of a fishing pole. Not sure now lossy the ribbon cable is on HF, probably similar to zip cord which goes way back. See nice article on the above in March QST. KR8L shows comparison loss compared to lightweight coax feeders and there's not much in it. David G3UNA Frank, I do not know of a source, but contrary to other posts, the Norcal doublet used actual computer #26 IDS wire (not rotator wire). Don't get me wrong, the rotator wire will work, but it will not be as lightweight as one constructed of computer flat cable as the NorCal doublet was. If you want an antenna that will perform just like the NorCal doublet, use any kind of wire for the radiator, cut to 22 ft. on each side and feed it with 300 ohm ladder line. I use the #22 teflon wire offered frequently by N2GO on the QRP reflector for the radiating element, and use either lengths of the same N2GO wire twisted for the feedline or I use the 300 ohm ladder line. The teflon insulation is nice because it does not stick to tree limbs and if tangled is easy to untangle because of the 'slippery' nature of teflon. The antenna is the same as the NorCal doublet, but the wire is different. 73, Don W3FPR Frank MacDonell wrote: Does anyone know where one can purchase the wire for the NorCal Doublet Antenna (4 strand computer ribbon wire)? 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
Re: [Elecraft] multiple Digests
Julius Fazekas wrote: Yesterday I was getting dupes of the digests... Today, I'm getting three of each. Problem with my email provider or on the sending side? You would need to look at the Received headers on the messages to allocate blame, and even then you can only really allocate it to the interface between two systems. Email is designed to fail towards duplication. There is a stage at the end of sending the text where the receiver may have successfully received it but the sender hasn't had confirmation. For a large email, and an overloaded system, that might last long enough for the sender to assume a failure and resend. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] Control board U4 8v regulator issueSolved problem
Mike-WE0H wrote: shame the regulator manufacturer sells a 8v regulator that is barely at the minimum end of it's spec's, but it is good that the K2 can be modified to work with the lower voltage regulator if need be. It's a shame that the K2 doesn't work when its components are all in tolerance! There should be no need for a fix. -- David Woolley The Elecraft list is a forum for the discussion of topics related to Elecraft products and more general topics related ham radio List Guidelines http://www.elecraft.com/elecraft_list_guidelines.htm __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] Control board U4 8v regulator issueSolved problem
Oh mine was working excellent last night for it's first time listening on the air 40m. Heard South Africa and some South Pacific islands on 40m after I peaked the 40m bandpass filter. The only issue I had was that regulator that was a piece of cake to troubleshoot repair. So far I am totally impressed with this kit it's design, well worth the money spent. Mike WE0H David Woolley (E.L) wrote: Mike-WE0H wrote: shame the regulator manufacturer sells a 8v regulator that is barely at the minimum end of it's spec's, but it is good that the K2 can be modified to work with the lower voltage regulator if need be. It's a shame that the K2 doesn't work when its components are all in tolerance! There should be no need for a fix. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] NorCal Doublet
Don, Is the 300 ohm ladder line you mention actually open or like TV twin lead? 72, Tom, ng3v -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, March 07, 2009 12:16 AM To: Frank MacDonell Cc: Elecraft Subject: Re: [Elecraft] NorCal Doublet Frank, I do not know of a source, but contrary to other posts, the Norcal doublet used actual computer #26 IDS wire (not rotator wire). Don't get me wrong, the rotator wire will work, but it will not be as lightweight as one constructed of computer flat cable as the NorCal doublet was. If you want an antenna that will perform just like the NorCal doublet, use any kind of wire for the radiator, cut to 22 ft. on each side and feed it with 300 ohm ladder line. I use the #22 teflon wire offered frequently by N2GO on the QRP reflector for the radiating element, and use either lengths of the same N2GO wire twisted for the feedline or I use the 300 ohm ladder line. The teflon insulation is nice because it does not stick to tree limbs and if tangled is easy to untangle because of the 'slippery' nature of teflon. The antenna is the same as the NorCal doublet, but the wire is different. 73, Don W3FPR Frank MacDonell wrote: Does anyone know where one can purchase the wire for the NorCal Doublet Antenna (4 strand computer ribbon wire)? 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 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] FS: K2/100 complete system
K2/100 SN: 4790 with KAT100-1, KSB2, KDSP2, KNB2, K160RX, K60XV. Complete with all manuals, cables and spare parts. Excellent condition, completely stock (no extra holes) except for CW tuning indicator which can be easily removed. I also have a KAT2 with top cover and speaker which I can sell with the K2 or separately. If interested please reply off list to K3OOL at yahoo.com and I can send you pictures and more details. 73, Craig Miller K3OOL __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] My K3 died suddenly
In a pile up. Touching the keyer and it just died. PSU OK. What happened? S/N 2066 73 de Ben www.sm6cku.se __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] My K3 died suddenly
Ben, I think you need to do some more analysis locally. 73, Bob W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of SM6CKU Sent: Saturday, March 07, 2009 8:21 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] My K3 died suddenly In a pile up. Touching the keyer and it just died. PSU OK. What happened? S/N 2066 73 de Ben www.sm6cku.se __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] NorCal Doublet
It is the narrow window line. The Wireman #562 is what I bought at one of the hamfests. 73, Don W3FPR NG3V wrote: Don, Is the 300 ohm ladder line you mention actually open or like TV twin lead? 72, Tom, ng3v -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, March 07, 2009 12:16 AM To: Frank MacDonell Cc: Elecraft Subject: Re: [Elecraft] NorCal Doublet Frank, I do not know of a source, but contrary to other posts, the Norcal doublet used actual computer #26 IDS wire (not rotator wire). Don't get me wrong, the rotator wire will work, but it will not be as lightweight as one constructed of computer flat cable as the NorCal doublet was. If you want an antenna that will perform just like the NorCal doublet, use any kind of wire for the radiator, cut to 22 ft. on each side and feed it with 300 ohm ladder line. I use the #22 teflon wire offered frequently by N2GO on the QRP reflector for the radiating element, and use either lengths of the same N2GO wire twisted for the feedline or I use the 300 ohm ladder line. The teflon insulation is nice because it does not stick to tree limbs and if tangled is easy to untangle because of the 'slippery' nature of teflon. The antenna is the same as the NorCal doublet, but the wire is different. 73, Don W3FPR Frank MacDonell wrote: Does anyone know where one can purchase the wire for the NorCal Doublet Antenna (4 strand computer ribbon wire)? 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 __ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] My K3 died suddenly
Is the radio completely dead as if there is now power applied? PSU is generating power, but is it reaching the rig? Did the power cable wiggle itself loose? Is a fuse blown? - Keith N1AS - - SKCC 344c - -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of SM6CKU Sent: Saturday, March 07, 2009 9:21 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] My K3 died suddenly In a pile up. Touching the keyer and it just died. PSU OK. What happened? S/N 2066 73 de Ben www.sm6cku.se __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 alive again
Thanks for all replies and suggestions. I checked everything I could and all of a sudden it worked again. Don't ask me what I did or did not but I am happy it works again. It might have been something with the DC cabling but my second rig on same power worked all the time. Never mind, thanks guys, and have a nice weekend 73 de Ben www.sm6cku.se __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Relay Noise
I am probably am just hearing things, but for some time I have heard what sounds like a relay switch, just once, in my K3, #1292, while it is powered off. Is there anything that would be still powered and busy while the K3 is supposedly OFF that could be doing this? I have no other equipment in the area, and my ear is only about 18 from the K3 when I hear it. Anyone else hearing this? This morning when I heard this noise the K3 had not been powered ON since last night. I power all my radio equipment with solar charged batteries, FWIW. 73, Ken, NU4I __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] PAR END FEDS
THANKS EVERYONE FOR YOUR HELP AND ANSWERS REGUARDING THE PAR END FEDS. I WAS TOLD BY PAR TO NOT USE A TUNER,JUST TO TRIM THE EXCESS. IF ANYONE HAS AN EXPERENCE USING A TUNER WITH ONE OF THE ENDFEDS,ID LIKE TO KNOW YOUR RESULTS. THIS IS AT A 5 WATT LEVEL I WILL BE USING. HAS ANYONE TUNED ONE WITH A TUNER USING 100WATTS? THANKS CHUCK PRIDGEN,N4UED __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 : Is this ok for AGC threshold??
Hi Gang Construction on my 3rd K2 is coming right along..BUTI have a question: I'm at page 48 of the manual where I am going through the first power-up checks. I can't get the AGC Threshold voltage up to 3.8 Vdc as suggested. My new K2 tops out around 3.62 as measured with a Square D WMM-23 digital multimeter. Is this something I should worry about?? 73deFred N9TA K2 serial# 6705 under construction __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] PAR END FEDS
Chuck, You don't say which model you have. The QRP version maybe??? If so, you don't want to try running 100 watts through it! In any event, you shouldn't need a tuner unless you are trying to use the antenna on a band it's not designed for. I suspect PAR's warning was perhaps because the matching network may not be stout enough to withstand a really bad mismatch while you are trying to tune it. Perhaps you can get away with it if you drop your power way down while tuning, but I'd be wary of doing that. Dave W7AQK - Original Message - From: Chuck Pridgen cprid...@embarqmail.com To: Elecraft@mailman.qth.net Sent: Saturday, March 07, 2009 8:17 AM Subject: [Elecraft] PAR END FEDS THANKS EVERYONE FOR YOUR HELP AND ANSWERS REGUARDING THE PAR END FEDS. I WAS TOLD BY PAR TO NOT USE A TUNER,JUST TO TRIM THE EXCESS. IF ANYONE HAS AN EXPERENCE USING A TUNER WITH ONE OF THE ENDFEDS,ID LIKE TO KNOW YOUR RESULTS. THIS IS AT A 5 WATT LEVEL I WILL BE USING. HAS ANYONE TUNED ONE WITH A TUNER USING 100WATTS? THANKS CHUCK PRIDGEN,N4UED __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 : Is this ok for AGC threshold??
Fred, It is all relative. If the 8 volt regulator output is on the lower side of its spec (it is a 10% tolerance part), then everything will work out just fine, set it to the maximum. Reason - the IF amplifier is the stage controlled by the AGC, *and* it is powered by the 8 volt regulator. When the IF Amp supply voltage is reduced, the ACG action begins at a lower voltage point than at higher voltages. Bottom line - if you are able to set the S-meter parameters with the lower AGC Threshold voltage, then all is well. If you cannnot adjust the S-meter, then a 10k to 15k resistor soldered across pins 3 and 4 of Control Board RP6 will allow you to adjust the threshold upward. Yes, a manual errata sheet should be published IMHO. The 3.8 volts is not graven in stone. There is an implication in the K2 manual that the AGC threshold can be optimized later on, but there are no details of how to do that - in fact, that optimization is simply reducing the AGC Threshold voltage so that receiver noise does not activate the AGC. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Gang Construction on my 3rd K2 is coming right along..BUTI have a question: I'm at page 48 of the manual where I am going through the first power-up checks. I can't get the AGC Threshold voltage up to 3.8 Vdc as suggested. My new K2 tops out around 3.62 as measured with a Square D WMM-23 digital multimeter. Is this something I should worry about?? 73deFred N9TA K2 serial# 6705 under construction __ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 : Is this ok for AGC threshold??
Thanks for the quick reply Don !!! I guess I will continue then.I'd decided to stop further construction until I had an answer. Just in case it was something to be concerned about. Goshseems like these components just get smaller and smallerHI HI 73...de...Fred N9TA ___ Don Wilhelm wrote: Fred, It is all relative. If the 8 volt regulator output is on the lower side of its spec (it is a 10% tolerance part), then everything will work out just fine, set it to the maximum. Reason - the IF amplifier is the stage controlled by the AGC, *and* it is powered by the 8 volt regulator. When the IF Amp supply voltage is reduced, the ACG action begins at a lower voltage point than at higher voltages. Bottom line - if you are able to set the S-meter parameters with the lower AGC Threshold voltage, then all is well. If you cannnot adjust the S-meter, then a 10k to 15k resistor soldered across pins 3 and 4 of Control Board RP6 will allow you to adjust the threshold upward. Yes, a manual errata sheet should be published IMHO. The 3.8 volts is not graven in stone. There is an implication in the K2 manual that the AGC threshold can be optimized later on, but there are no details of how to do that - in fact, that optimization is simply reducing the AGC Threshold voltage so that receiver noise does not activate the AGC. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Gang Construction on my 3rd K2 is coming right along..BUTI have a question: I'm at page 48 of the manual where I am going through the first power-up checks. I can't get the AGC Threshold voltage up to 3.8 Vdc as suggested. My new K2 tops out around 3.62 as measured with a Square D WMM-23 digital multimeter. Is this something I should worry about?? 73deFred N9TA K2 serial# 6705 under construction __ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 ATU readout
Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? Thanks, Ty, W1TF, K3 #696 -- Wayne wrote: Most of the time you'll let the KAT3 automatic antenna tuner do its thing and ignore it. It has a wide matching range and saves L-C information per-band and per-antenna, so you'll rarely need to re-tune. (We do plan to add multiple stored segments per band, too.) If you're ever curious about the actual L and C values used in the matching network, you can check them using a special setting of the KAT3 menu entry (in the CONFIG menu). Just set KAT3 to LCSET, then exit the menu. Next, tap ATU TUNE. This will display the present L and C values. For example, I just matched my K3 on a random wire antenna on 40 meters, went into LCSET mode, and saw this when I tapped ATU TUNE: CA 0.08 nF L 0.25 uH The CA means that the capacitance ended up on the antenna side of the L-network. The other possibility is CT, or capacitance on the transmitter side. The capacitance is shown in nF (nanofarads) so it can fit into three digits on the VFO A display even when the value is over 999 pF. The value shown, 0.08 nF, could also be expressed as 80 pF. Now, suppose you'd like to see what the effect of changing the L and C values would be on the match. (Or you're troubleshooting the KAT3.) You can simply rotate VFO A to change the C value, and rotate VFO B to change the L value. Tapping ANT alternates between CA and Ct. Having made a change, tap ATU TUNE again to exit the L-C display. Then hold TUNE to go into transmit mode and see the new SWR value. Manual view/change of LC settings is certainly fun and educational. But it could also be used to give me (your overworked firmware guy) feedback about a difficult matching situation. I'm always open to fine-tuning the KAT3's algorithm. So if you discover -- using LCSET -- that you're able to do better than the KAT3 in auto-tune mode, just let me know. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Reminder - UK Elecraft net Sundays 1000 local, 3630 KHz
The frequency is plus or minus the QRM (usually down a little from 3630). Start time 1000 hours. 73 Dave, G4AON K3/100, Acom 1000, dipole __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] NorCal Doublet
Thanks Don and all who responded - I am taking your advice and ordering the wire. I have also ordered a BLT and I am waiting for it to arrive. 2 Questions - How do you terminate the ladder line with the antenna line and what are your recommendations for supporting the antenna in the field. Thanks a lot for your help! FJM On Sat, Mar 7, 2009 at 12:15 AM, Don Wilhelm w3...@embarqmail.com wrote: Frank, I do not know of a source, but contrary to other posts, the Norcal doublet used actual computer #26 IDS wire (not rotator wire). Don't get me wrong, the rotator wire will work, but it will not be as lightweight as one constructed of computer flat cable as the NorCal doublet was. If you want an antenna that will perform just like the NorCal doublet, use any kind of wire for the radiator, cut to 22 ft. on each side and feed it with 300 ohm ladder line. I use the #22 teflon wire offered frequently by N2GO on the QRP reflector for the radiating element, and use either lengths of the same N2GO wire twisted for the feedline or I use the 300 ohm ladder line. The teflon insulation is nice because it does not stick to tree limbs and if tangled is easy to untangle because of the 'slippery' nature of teflon. The antenna is the same as the NorCal doublet, but the wire is different. 73, Don W3FPR Frank MacDonell wrote: Does anyone know where one can purchase the wire for the NorCal Doublet Antenna (4 strand computer ribbon wire)? Thanks -- Frank KD8FIP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] Pull-up Question
I've a question on the pull-up resistor mod for the KIO3 board: is this addition being done to support legacy devices or is it the wave-of-the-future (or none of the above)? If current interface standards don't require the pull-up capability and the outlook for the future is the same, I think I will take a pass on doing the mod. Otherwise I shall take the K3 apart again and add the resistors (I skipped that mod when doing the K3 upgrades but have decided it might be best to be sure). Mike W5FTD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 : Is this ok for AGC threshold??
Hi Fred, I ran into that regulator issue a couple nights ago. I changed the 8v regulator with a used one I had here which brought the 8v line up to 8.30v. The original 8v regulator put out 7.61v. My AGC pot is a half scale right now with the 3.80v level as the manual states. The resistor mod takes care of the issue if you don't have a spare regulator laying around. Mike WE0H Fred N9TA wrote: Thanks for the quick reply Don !!! I guess I will continue then.I'd decided to stop further construction until I had an answer. Just in case it was something to be concerned about. Goshseems like these components just get smaller and smallerHI HI 73...de...Fred N9TA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up Question
It is to support a myriad of devices that use ttl levels such as band decoders that drive antenna switches, bandpass filters, etc. A slip of the foot you may soon recover, but a slip of the tongue you may never get over. Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Corboy-Poteet Sent: Saturday, March 07, 2009 10:44 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [K3] Pull-up Question I've a question on the pull-up resistor mod for the KIO3 board: is this addition being done to support legacy devices or is it the wave-of-the-future (or none of the above)? If current interface standards don't require the pull-up capability and the outlook for the future is the same, I think I will take a pass on doing the mod. Otherwise I shall take the K3 apart again and add the resistors (I skipped that mod when doing the K3 upgrades but have decided it might be best to be sure). Mike W5FTD __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 ATU readout
Ralph Tyrrell wrote: Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? Had the same idea: Using my K3's ATU settings to determine the impedance of my antenna. The formula is easy. But besides L, CA or CT and the frequency, it contains the TX output impedance, which probably differs from 50+j0 ohms. Any opinions? Markus -- View this message in context: http://n2.nabble.com/K3-ATU-readout-tp2441197p2441471.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] NorCal Doublet
My feedline is permanently soldered to the radiator wires. Since my field/portable operation is always QRP, the insulators are cut from a sheet of 1/4 inch Lexan that I have lying around, but there is no reason that plastic from a milk container or similar could not be used instead. As I said, I have a 25 foot length of feedline permanently affixed to mine, and I carry an additional 25 ft. length of feedline for use when needed and more convenient. I use APP connectors to attach the extra length and the balanced side of the balun has a short length of feedline with an APP on it. Think about your deployment situations and use whatever works for you. 73, Don W3FPR Frank MacDonell wrote: Thanks Don and all who responded - I am taking your advice and ordering the wire. I have also ordered a BLT and I am waiting for it to arrive. 2 Questions - How do you terminate the ladder line with the antenna line and what are your recommendations for supporting the antenna in the field. Thanks a lot for your help! FJM On Sat, Mar 7, 2009 at 12:15 AM, Don Wilhelm w3...@embarqmail.com wrote: Frank, I do not know of a source, but contrary to other posts, the Norcal doublet used actual computer #26 IDS wire (not rotator wire). Don't get me wrong, the rotator wire will work, but it will not be as lightweight as one constructed of computer flat cable as the NorCal doublet was. If you want an antenna that will perform just like the NorCal doublet, use any kind of wire for the radiator, cut to 22 ft. on each side and feed it with 300 ohm ladder line. I use the #22 teflon wire offered frequently by N2GO on the QRP reflector for the radiating element, and use either lengths of the same N2GO wire twisted for the feedline or I use the 300 ohm ladder line. The teflon insulation is nice because it does not stick to tree limbs and if tangled is easy to untangle because of the 'slippery' nature of teflon. The antenna is the same as the NorCal doublet, but the wire is different. 73, Don W3FPR Frank MacDonell wrote: Does anyone know where one can purchase the wire for the NorCal Doublet Antenna (4 strand computer ribbon wire)? Thanks No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft marketing!
I'm going to the Charlotte (NC) hamfest next weekend and would have loved to have been able to wear an Elecraft tee shirt. Maybe with the K4 introduction? __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 ATU readout
Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? The K3 tuner looks like an L network with series L and shunt C that is placed either on the antenna side or transmitter side of the inductor. When the shunt capacitance is on the antenna side the impedance of the antenna is higher than 50 ohms. When it is on the transmitter side the antenna is showing less than 50 ohms. Right now I show on my K3 CA = 0.16 nF and L = 0.70 uH, I am matched at frequency of 7.025 MHz. I now start cheating and use a program called L TUNER at: http://www.smeter.net/feeding/l-network-terminating-impedance.php I click on the L TUNER link and run the program (does not require installation) and choose the topology (series inductor shunt capacitance on the output or right side, network #1). I would choose network #3 if my capacitance value was on the transmitter side. I then enter the inductance of 0.7 uH, capacitance of 160 pF (convert from nF shown on K3). Enter generator impedance (K3 transmitter) of 50 Ohms. And now enter frequency of 7.025 MHz. And the program computes the following values for the terminating impedance of the network assuming a proper conjugate match to the 50-Ohms resistive load of the transmitter: Series Resistance R = 67.9 Ohms Series Reactance X = -8.8 Ohms Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) NAQCC 3535 K3-100 #508 / KX1 #1311 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
From what I understand the 6 pack would require a band decoder and proper switching levels to switch the 6 pack. I do not believe that you can switch the 6 pack with the levels off any rig. There needs to be some type of interface between the switches and the radio. I would send a note to Array Solutions. W5OV have been very helpful with my questions and has a K3. Mike W0MU A slip of the foot you may soon recover, but a slip of the tongue you may never get over. Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger Sent: Saturday, March 07, 2009 12:04 PM To: elecraft Subject: Re: [Elecraft] [K3] Pull-up question Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
The six-pack needs +14 volt drive to enable its relays. Power is applied to each antenna relay to be selected. This is usually provided by the Six-pack switch or an external decoder/driver such as the Elecraft KRC2. The K3 alone will not be able to provide the drive - it definitely needs the external band decoder. Of course we suggest the KRC2 for this function, it performs the service quite well. -Jack Brindle, W6FB Elecraft Engineering === On Mar 7, 2009, at 11:10 AM, W0MU Mike Fatchett wrote: From what I understand the 6 pack would require a band decoder and proper switching levels to switch the 6 pack. I do not believe that you can switch the 6 pack with the levels off any rig. There needs to be some type of interface between the switches and the radio. I would send a note to Array Solutions. W5OV have been very helpful with my questions and has a K3. Mike W0MU A slip of the foot you may soon recover, but a slip of the tongue you may never get over. Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Roger Sent: Saturday, March 07, 2009 12:04 PM To: elecraft Subject: Re: [Elecraft] [K3] Pull-up question Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 ATU readout
I've not tried it yet, but this program might do it: http://newsgroups.derkeiler.com/Archive/Rec/rec.radio.amateur.homebrew/2005- 08/msg00101.html The descriptions says: Occasionally it may be useful to deduce the value of the terminating impedance of an L-match network when only the values of the coil (uH) and capacitor (pF) and the frequency are known. Program L_NETWK does exactly that. Ron AC7AC -Original Message- Ralph Tyrrell wrote: Wayne gave us a way to read out what the ATU settings. Does anyone have the formula or formulae for using CT or CA and the L and C values to determine the impedance presented to the ATU? Had the same idea: Using my K3's ATU settings to determine the impedance of my antenna. The formula is easy. But besides L, CA or CT and the frequency, it contains the TX output impedance, which probably differs from 50+j0 ohms. Any opinions? Markus __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Unable to save Quick or any memory
I have the beta version installed and now unable to save repeater settings or freq. to any of the 100 memories I am trying to save 6 meter repeater's in my area, when I enter and save 00 then 01 , 01 replaces 00 etc. Please help Duane W6ddr duanere...@mac.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
Re: [Elecraft] K3 ATU readout
Please keep in mind that the L C display tells what is selected in the matching network. There are stray capacitances and inductances on the PC board. If the indicated inductance or capacitance are very low, or the matched impedance is highly reactive, these strays may be significant. Enjoy! 73, Lyle KK7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
Roger, That is where the situation gets 'sticky'. It all depends on what the circuits at the end away from the K3 have implemented. You have two pullup resistors on each line and 2 separate voltage sources. 1) If the voltage to the pullup resistors in the internal device do not match the voltage to the pullup resistors in the K3, there will be a continuous flow of current through both pullups on any one line when the drivers are at their open, non-conducting state). If the voltages are close to the same value, this may not cause a problem, but if they are quite different (say one is 12 volts and the other is 5 volts), that could create a big problem. 2) The drivers in the K3 (when at the low level) must carry the current provided by both pullup resistors. Whether that is a problem or not depends on the value of the pullup resistors and the current capability of the drivers. In my view of a good design, open collector (or open drain) drivers are the only thing to use. The terminating device can determine what voltage is needed for reliable switching at its input and that device controls the high level by providing its own pullup resistors. Secondly, the pullup values can be sized according to the high level input current required by that device and can control its immunity to noise by controlling its input conditions. All is under the control of the external device designer. Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. 73, Don W3FPR 73, Don W3FPR Roger wrote: Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2: dead on 60m and 40m
I have not used the K2 in some time, and tonight I notice that both 60m and 40m sound dead (all signals are very weak) and I have no power output- I have not measured with an inline meter but there is nothing on the K2 display. All other bands seem fine. I have the KAT2 in CALS mode since I use an external autotuner and I can see the swr drop as I transmit on bands other than 60 or 40, but I (sometimes) get a Lo P warning when I hold in the tune button on 60 and 40m. I wonder if anyone has any bright ideas? The K2 has sat in its travelling case for the past several weeks so has not seen any action, except that is, that I opened up the case to install a new sealed lead acid battery. I have just re-opened it and cannot see anything I might have disturbed. Thanks Stephen G4SJP __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft SSB Net Inquery
Hi gang, The weekly Elecraft SSB net would normally meet tomorrow (Sunday, 3/1/09) at 1800Z. We start at 14.316 MHz, and QSY if needed. However, the band is filled wall to wall with the DX contest. We can try to give it a go if folks are interested, but I fear that it will be an exercise in frustration. Any feedback - should we try it? Thank you. 73, Phil, NS7P __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K2] K2 K2ATOBKT Low Battery
HI, OK I am just finishing up the A to B mod and somewhere at the end between Misc control board changes and sidetone Modification or possibly after the XFILMDKT I am getting Low Battery warning and 000 reading for voltage when tapping Display. This is with power coming from a power supply and not the internal battery. I did miss a pin count on the sidetone mod and fixed that. (used pin 7 rather than 6) and for the 82-mH inductor, I missed a pin by one as well (using pin 8 and 10 rather than the proper 7 and 10) and this has been fixed. And it was all going so well! Thanks in advance! - W4HDM-DAMON-K2#473 -- View this message in context: http://n2.nabble.com/-K2--K2-K2ATOBKT-%22Low-Battery%22-tp2442171p2442171.html Sent from the [K2] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2: dead on 60m and 40m
Stephen, Add a capacitor to your antenna lead and use it to inject signals into the K2 (AKA Cheap and Dirty Signal Tracing) first at W1, then at pin 3 or 5 of J13 (on the K60XV board), then at the cathode end of D6. The first place you hear signals more or less of the proper strength will identify the area of difficulty. If you hear signals at W1, the problem is in the Low Pass Filter If you first hear signals at the D6 cathode, but they are very weak at pin 3 or 5 of the K60XV board, than the problem is either in the bandpass filter or on the K60XV board. In this latter case, there is one more step - remove the K60XV and put the leads of a 4.7 pF (up to 10 pF is OK for this test) into the outer holes of J15 and see if you hear normal 40 meter signals - if so, the bandpass filter is OK and the problem lies on the K60XV board (or it was not plugged in right). 73, Don W3FPR Stephen Prior wrote: I have not used the K2 in some time, and tonight I notice that both 60m and 40m sound dead (all signals are very weak) and I have no power output- I have not measured with an inline meter but there is nothing on the K2 display. All other bands seem fine. I have the KAT2 in CALS mode since I use an external autotuner and I can see the swr drop as I transmit on bands other than 60 or 40, but I (sometimes) get a Lo P warning when I hold in the tune button on 60 and 40m. I wonder if anyone has any bright ideas? The K2 has sat in its travelling case for the past several weeks so has not seen any action, except that is, that I opened up the case to install a new sealed lead acid battery. I have just re-opened it and cannot see anything I might have disturbed. Thanks Stephen G4SJP __ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K2] K2 K2ATOBKT Low Battery
Damon, Well, I haven't heard that problem in a long time, but the solution is easy. On the top of the Control Board, just to the right of center is a switch to change the voltage display from external to internal - you must have bumped it in the upgrade process - set it to the INT position and all will be well. 73, Don W3FPR W4HDM wrote: HI, OK I am just finishing up the A to B mod and somewhere at the end between Misc control board changes and sidetone Modification or possibly after the XFILMDKT I am getting Low Battery warning and 000 reading for voltage when tapping Display. This is with power coming from a power supply and not the internal battery. I did miss a pin count on the sidetone mod and fixed that. (used pin 7 rather than 6) and for the 82-mH inductor, I missed a pin by one as well (using pin 8 and 10 rather than the proper 7 and 10) and this has been fixed. And it was all going so well! Thanks in advance! - W4HDM-DAMON-K2#473 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K2] RE: K2 K2ATOBKT Low Battery
BINGO!! Don thanks . I suppose once I have owned this for a while those obvious fixes will become ..well, obvious LOL 73 Damon From: Don Wilhelm-4 (via Nabble) [mailto:ml-user+39068-851166...@n2.nabble.com] Sent: Saturday, March 07, 2009 5:16 PM To: W4HDM Subject: Re: K2 K2ATOBKT Low Battery Damon, Well, I haven't heard that problem in a long time, but the solution is easy. On the top of the Control Board, just to the right of center is a switch to change the voltage display from external to internal - you must have bumped it in the upgrade process - set it to the INT position and all will be well. 73, Don W3FPR W4HDM wrote: HI, OK I am just finishing up the A to B mod and somewhere at the end between Misc control board changes and sidetone Modification or possibly after the XFILMDKT I am getting Low Battery warning and 000 reading for voltage when tapping Display. This is with power coming from a power supply and not the internal battery. I did miss a pin count on the sidetone mod and fixed that. (used pin 7 rather than 6) and for the 82-mH inductor, I missed a pin by one as well (using pin 8 and 10 rather than the proper 7 and 10) and this has been fixed. And it was all going so well! Thanks in advance! - W4HDM-DAMON-K2#473 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@... http://n2.nabble.com/user/SendEmail.jtp?type=nodenode=2442211i=0 This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html _ This email is a reply to your post @ http://n2.nabble.com/-K2--K2-K2ATOBKT-%22Low-Battery%22-tp2442171p2442211.ht ml You can reply by email or by visting the link above. - W4HDM-DAMON-K2#473 -- View this message in context: http://n2.nabble.com/-K2--K2-K2ATOBKT-%22Low-Battery%22-tp2442171p2442234.html Sent from the [K2] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Thanks Eric
It WAS good reading for a little bit, and I didn't really care one way or the other, as its whatever floats your boat to begin with, it was getting old. And please nobody get offended. PSE. Bill, K3WJV (QRO most of the time, but QRP is cool too. eenie meenie) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Different W1 wattmeter housing
As part of the recent discussion about changing the SWR LED's in the W1 to green-yellow-red, I've talked with Dave, W8FGU to compare notes. Dave is the guy who makes the Plexiglas housings for the W1 and AF1 accessories. See Plexiglas Cases for ... at the bottom of the front page of the Elecraft website or http://w8fgu.home.comcast.net . Dave responded to my inquiry about a W1 case made from darker smoked plastic and he's made one for me. He's sent me photos and it's on the way. (:-) I assume Dave would be willing to make more of them 73! Ken Kopp - K0PP elecraftcov...@rfwave.net http://tinyurl.com/7lm3m5 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] First K1 carrying case shipped
I've just shipped my first K1 carrying case. It's cute! You can see it in photos 47 and 48 on my URL. http://tinyurl.com/7lm3m5 73! Rose elecraftcov...@rfwave.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
[Elecraft] Where is it in the MANUAL???
I'd like to SET the internal clock of the K3 to be somewhere near accurate, but where is that EXPLAINED IN THE K3 manual? Jim/nn6ee PS, Even Elecraft needs to EXPLAIN more in the manuals because not ALL OF US ARE IT GENIUSES!!! Jim/nn6ee __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Where is it in the MANUAL???
It's described in the Miscellaneous Setup section under the Time and Date heading - on page 47 of the K3 Owners Manual. Bob NW8L On Sat, Mar 7, 2009 at 5:11 PM, JIM DAVIS nn...@astound.net wrote: I'd like to SET the internal clock of the K3 to be somewhere near accurate, but where is that EXPLAINED IN THE K3 manual? Jim/nn6ee PS, Even Elecraft needs to EXPLAIN more in the manuals because not ALL OF US ARE IT GENIUSES!!! Jim/nn6ee __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Where is it in the MANUAL???
Whatever you do: 1) Do NOT look at the K3 Owner's Manual 2) ESPECIALLY, do NOT look at the Contents 3) Really, do NOT look under the Configuration section in Contents 4) If it's the last thing you do, DO NOT UNDER ANY CIRCUMSTANCES look at the Miscellaneous Setup line, which would indicate Page 47. 5) If, my some horrible mistake, you actually go to page 47, DO NOT READ the section where it says: Time and Date CONFIG:TIME sets the 24-hour real-time-clock (RTC). Tap 1 / 2 / 3 to adjust HH/MM/SS using VFO A. This URL shows UTC as well as all U.S. time zones: tycho.usno.navy.mil/cgi-bin/timer.pl CONFIG:DATE MD selects US (MM.DD.YY). or EU (DD.MM.YY) date format using VFO A. CONFIG:DATE is used to set the date. Tap 1 / 2 / 3 to adjust MM/DD/YY or DD/MM/YY. In my older version of the manual, it was found on page 44. ;-) 73, Steve NN4X -- in UPPERCASE, 'cause I'm proud of my callsign. Saint Cloud, Florida On Sat, Mar 7, 2009 at 7:11 PM, JIM DAVIS nn...@astound.net wrote: I'd like to SET the internal clock of the K3 to be somewhere near accurate, but where is that EXPLAINED IN THE K3 manual? Jim/nn6ee PS, Even Elecraft needs to EXPLAIN more in the manuals because not ALL OF US ARE IT GENIUSES!!! Jim/nn6ee __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] accurate time
While on the subject of time, where is the oscillator that is used by the built-in clock on the K3? Is it adjustable? If so, how? I find that the internal clock loses something like half a minute per day. I'd like it to do better than that. Is there a way? 73, Oliver Johns W6ODJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Your Opinion: The realities of QRP vs. QRO
Geez, Bill! Do you actually believe that I think that QRP rules in every situation? I didn't say that. I guess I shouldn't joke on the reflector. Gary, N7HTS On Fri, 6 Mar 2009 09:34:53 -0800 (PST) Bill W4ZV btipp...@alum.mit.edu wrote: Gary D Krause wrote: Just as long as we all keep it in perspective and realize that QRP RULES! ;-) But QRP simply does NOT rule everywhere... ...for DXing on the low bands (80/160), ...for EME or meteor scatter on VHF, ...when propagation is marginal or atmospheric QRN is high, ...in emergency communications when a life depends on it. Sure QRP works well on the HF bands when conditions are good...it's a heck of a lot of fun to work across the world with a 2 Watt rig in an Altoids tin and a piece of wire...but please don't make blanket statements about QRP ruling for many activities...it simply doesn't. If QRPers want a REAL challenge, try working DXCC on 160m with 5 Watts. 73, Bill W4ZV (who loves both) -- View this message in context: http://n2.nabble.com/Your-Opinion%3A-The-realities-of-QRP-vs.-QRO-tp2429074p2437055.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 #6705 question...missing part.
Hi Gang The trials and tribulations with #6705 keep comingHI HI I have looked high and lowover and overand I can find no RFC15. This is a subminiature 100uH choke that is tacked onto the bottom of the RF board. I have the Qty 4 of the regular 100uH chokes that I'm supposed to havebut no additional miniature 100uH. Now here's the question: I've looked at the schematic, and RFC15 feeds power to the Synthesizer (U4). Without power to that chip I am through with the assembly of #6705 til Elecraft can get me a RFC15 shipped out. So I used one of the regular 100uH chokes... keeping the lead lengths as short as humanly possible...and it actually fit rather well. Is this likely to have any ugly consequences? I will contact Elecraft about the shortageand I'm sure they'll handle it with the efficiency we've come to love and respectbut I don't want to lose this weekends effort! ActuallyIF the installation of the larger choke gives me no instability issues, is there a reason to bust up a sexy solder job on the larger one I cabbaged in?? Jeez...this is not NEAR the fun I remember on my previous two K2s!! I'm having serious regrets that I didn't go with a K3 insteadHI HI H, wonder if they'd let me trade up :-)) 73.de.Fred N9TA I hope the old Elecraft MOJO is still active!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Where is it in the MANUAL???
I echo this. I immediately downloaded the manual when I got my K3 in January and have saved countless moments of frustration by searching. Sometimes the keyword is not what you expect it to be and having the ability to electronically thumb through the manual is a huge plus. 73, Sid K3SX Were I you, I'd strongly consider downloading the PDF version of the Manual and then use Acrobat reader (free) to SEARCH for words (like CLOCK) within the PDF... a really EASY way to find subjects you can't find otherwise in the Manual. 73, Tom Hammond N0SS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 #6705 question...missing part.
Fred, Check the last part of item 15 in the Errata sheet - that explains that the choke for RFC15 may be the same as the other 100 uH chokes. You *did* transfer all the information in the errata sheet into the manual before you started did you not? If not, that is standard operating practice and very important. I cannot emphasize the importance of the errata sheets enough - they contain the latest information and using that information can avoid many errors. In this case, it has only caused a bit of confusion. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Gang The trials and tribulations with #6705 keep comingHI HI I have looked high and lowover and overand I can find no RFC15. This is a subminiature 100uH choke that is tacked onto the bottom of the RF board. I have the Qty 4 of the regular 100uH chokes that I'm supposed to havebut no additional miniature 100uH. Now here's the question: I've looked at the schematic, and RFC15 feeds power to the Synthesizer (U4). Without power to that chip I am through with the assembly of #6705 til Elecraft can get me a RFC15 shipped out. So I used one of the regular 100uH chokes... keeping the lead lengths as short as humanly possible...and it actually fit rather well. Is this likely to have any ugly consequences? I will contact Elecraft about the shortageand I'm sure they'll handle it with the efficiency we've come to love and respectbut I don't want to lose this weekends effort! ActuallyIF the installation of the larger choke gives me no instability issues, is there a reason to bust up a sexy solder job on the larger one I cabbaged in?? Jeez...this is not NEAR the fun I remember on my previous two K2s!! I'm having serious regrets that I didn't go with a K3 insteadHI HI H, wonder if they'd let me trade up :-)) 73.de.Fred N9TA I hope the old Elecraft MOJO is still active!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 #6705 question...missing part.
Hi Don Actually, I thought I HAD added the errata. I put a note that the COLOR of the choke might not be as listedbut if it mentioned the SIZE as changed I missed that!! In any case, the parts list a QTY of 4 large 100uH chokes...which I have. And then it lists the miniature 100uH choke which I do NOT have. So I would have thought I'd have found 5 (FIVE) large 100uH chokes if I'm supposed to use one of them for RFC15 73 de Fred N9TA _ Don Wilhelm wrote: Fred, Check the last part of item 15 in the Errata sheet - that explains that the choke for RFC15 may be the same as the other 100 uH chokes. You *did* transfer all the information in the errata sheet into the manual before you started did you not? If not, that is standard operating practice and very important. I cannot emphasize the importance of the errata sheets enough - they contain the latest information and using that information can avoid many errors. In this case, it has only caused a bit of confusion. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Gang The trials and tribulations with #6705 keep comingHI HI I have looked high and lowover and overand I can find no RFC15. This is a subminiature 100uH choke that is tacked onto the bottom of the RF board. I have the Qty 4 of the regular 100uH chokes that I'm supposed to havebut no additional miniature 100uH. Now here's the question: I've looked at the schematic, and RFC15 feeds power to the Synthesizer (U4). Without power to that chip I am through with the assembly of #6705 til Elecraft can get me a RFC15 shipped out. So I used one of the regular 100uH chokes... keeping the lead lengths as short as humanly possible...and it actually fit rather well. Is this likely to have any ugly consequences? I will contact Elecraft about the shortageand I'm sure they'll handle it with the efficiency we've come to love and respectbut I don't want to lose this weekends effort! ActuallyIF the installation of the larger choke gives me no instability issues, is there a reason to bust up a sexy solder job on the larger one I cabbaged in?? Jeez...this is not NEAR the fun I remember on my previous two K2s!! I'm having serious regrets that I didn't go with a K3 insteadHI HI H, wonder if they'd let me trade up :-)) 73.de.Fred N9TA I hope the old Elecraft MOJO is still active!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 #6705 question...missing part.
Fred, Yes, there should be 5 100 uH chokes, if you have only 4, send a note to pa...@elecraft.com and request an additional one. The part number is E690004. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Don Actually, I thought I HAD added the errata. I put a note that the COLOR of the choke might not be as listedbut if it mentioned the SIZE as changed I missed that!! In any case, the parts list a QTY of 4 large 100uH chokes...which I have. And then it lists the miniature 100uH choke which I do NOT have. So I would have thought I'd have found 5 (FIVE) large 100uH chokes if I'm supposed to use one of them for RFC15 73 de Fred N9TA _ Don Wilhelm wrote: Fred, Check the last part of item 15 in the Errata sheet - that explains that the choke for RFC15 may be the same as the other 100 uH chokes. You *did* transfer all the information in the errata sheet into the manual before you started did you not? If not, that is standard operating practice and very important. I cannot emphasize the importance of the errata sheets enough - they contain the latest information and using that information can avoid many errors. In this case, it has only caused a bit of confusion. 73, Don W3FPR Fred Bennett N9TA wrote: Hi Gang The trials and tribulations with #6705 keep comingHI HI I have looked high and lowover and overand I can find no RFC15. This is a subminiature 100uH choke that is tacked onto the bottom of the RF board. I have the Qty 4 of the regular 100uH chokes that I'm supposed to havebut no additional miniature 100uH. Now here's the question: I've looked at the schematic, and RFC15 feeds power to the Synthesizer (U4). Without power to that chip I am through with the assembly of #6705 til Elecraft can get me a RFC15 shipped out. So I used one of the regular 100uH chokes... keeping the lead lengths as short as humanly possible...and it actually fit rather well. Is this likely to have any ugly consequences? I will contact Elecraft about the shortageand I'm sure they'll handle it with the efficiency we've come to love and respectbut I don't want to lose this weekends effort! ActuallyIF the installation of the larger choke gives me no instability issues, is there a reason to bust up a sexy solder job on the larger one I cabbaged in?? Jeez...this is not NEAR the fun I remember on my previous two K2s!! I'm having serious regrets that I didn't go with a K3 insteadHI HI H, wonder if they'd let me trade up :-)) 73.de.Fred N9TA I hope the old Elecraft MOJO is still active!! __ 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 No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.0.237 / Virus Database: 270.11.8/1987 - Release Date: 03/06/09 07:20:00 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 stuck in MCU LD
Further to my previous email, I have tried to force a FW download per the manual, but the K3 does not respond. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]on Behalf Of W6IZT Sent: Saturday, March 07, 2009 9:49 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 stuck in MCU LD My k3 started to act up tonight. It was not putting out any power in CW, and was behaving as if it was in QSK mode even though it was in semi-breaking mode. The power output was OK in SSB. I tried to reload the FW and now it is stuck in MCU LD mode and the background light on the display is not lit. How do I get it out of MCU LD? Gregg W6IZT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 #6705 question...missing part.
Hi Jeff FANTASTIC !! Sounds like you are havin' a ball!! I seriously considered the K3, but I liked the K2 well enough to build a third one. I have broke my back since I last put a K2 together...although I get along fine in everyday life, my hunching over the workbench building # 6705 has me sore and grumpy. If I'd have known, I'd have chose the K3. I am looking forward to the finished product. Elecraft has a GREAT product,no matter which you choose! I'll look for your call on the air when I get this beast operational. 73de.Fred N9TA __ Jeff Wandling W7BRS wrote: Hi Fred, I bought a kit form K3 first. Built it. Had a thrill. Still enjoy the radio very much. It now has K3/100/sub-rx/ATU. So much I wanted to see how the other half lived and bought a K2, built it, and now know how the other half lives. They live good. Both were fun and pretty cool to build. It sparked my interest in building more homebrew projects. Good luck with your K2. On Sat, 7 Mar 2009, Fred Bennett N9TA wrote: Hi Gang The trials and tribulations with #6705 keep comingHI HI I have looked high and lowover and overand I can find no RFC15. This is a subminiature 100uH choke that is tacked onto the bottom of the RF board. I have the Qty 4 of the regular 100uH chokes that I'm supposed to havebut no additional miniature 100uH. Now here's the question: I've looked at the schematic, and RFC15 feeds power to the Synthesizer (U4). Without power to that chip I am through with the assembly of #6705 til Elecraft can get me a RFC15 shipped out. So I used one of the regular 100uH chokes... keeping the lead lengths as short as humanly possible...and it actually fit rather well. Is this likely to have any ugly consequences? I will contact Elecraft about the shortageand I'm sure they'll handle it with the efficiency we've come to love and respectbut I don't want to lose this weekends effort! ActuallyIF the installation of the larger choke gives me no instability issues, is there a reason to bust up a sexy solder job on the larger one I cabbaged in?? Jeez...this is not NEAR the fun I remember on my previous two K2s!! I'm having serious regrets that I didn't go with a K3 insteadHI HI H, wonder if they'd let me trade up :-)) 73.de.Fred N9TA I hope the old Elecraft MOJO is still active!! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 stuck in MCU LD
Unplug the radio for at least a minute then try again to load firmware Dick, K6KR Sent from my iPhone On Mar 7, 2009, at 19:34, W6IZT w6...@bellsouth.net wrote: Further to my previous email, I have tried to force a FW download per the manual, but the K3 does not respond. -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net]on Behalf Of W6IZT Sent: Saturday, March 07, 2009 9:49 PM To: elecraft@mailman.qth.net Subject: [Elecraft] K3 stuck in MCU LD My k3 started to act up tonight. It was not putting out any power in CW, and was behaving as if it was in QSK mode even though it was in semi- breaking mode. The power output was OK in SSB. I tried to reload the FW and now it is stuck in MCU LD mode and the background light on the display is not lit. How do I get it out of MCU LD? Gregg W6IZT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 missing part
I think I was scratching my head over the same choke, the manual and updates said it could be a different color, but it was the same as other chokes, and I was not actually short a choke. Brett N2DTS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. Let's see ... that would apply to the KRC2 in the parallel input mode along with the W9XT BCD-10 and the Yaesu Quadra for starters. On the other hand the TopTen Systems BD-Y, the original microHAM Band Decoder, the Yaesu FL-7000, and Tokyo High Power HL-1.5Kfx, have internal pull-up resistors. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, March 07, 2009 2:56 PM To: Roger Cc: elecraft Subject: Re: [Elecraft] [K3] Pull-up question Roger, That is where the situation gets 'sticky'. It all depends on what the circuits at the end away from the K3 have implemented. You have two pullup resistors on each line and 2 separate voltage sources. 1) If the voltage to the pullup resistors in the internal device do not match the voltage to the pullup resistors in the K3, there will be a continuous flow of current through both pullups on any one line when the drivers are at their open, non-conducting state). If the voltages are close to the same value, this may not cause a problem, but if they are quite different (say one is 12 volts and the other is 5 volts), that could create a big problem. 2) The drivers in the K3 (when at the low level) must carry the current provided by both pullup resistors. Whether that is a problem or not depends on the value of the pullup resistors and the current capability of the drivers. In my view of a good design, open collector (or open drain) drivers are the only thing to use. The terminating device can determine what voltage is needed for reliable switching at its input and that device controls the high level by providing its own pullup resistors. Secondly, the pullup values can be sized according to the high level input current required by that device and can control its immunity to noise by controlling its input conditions. All is under the control of the external device designer. Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. 73, Don W3FPR 73, Don W3FPR Roger wrote: Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] Elecraft CW Net Announcement
Good Evening, Currently it is cold (26 degrees F) out and snowing. There is going to be three to four inches of new snow by morning but the storm will keep going on into Monday at least. Winter still has its hold up here. However propagation seems to be getting better. Each morning it is easier to hear during my daily sked and the fox hunters are writing about good evening conditions too. There was a real sunspot this week even if it was one of the old season. A solar stream is on its way due midweek so the ionosphere will get fed. From the fox hunt reports of forty meters along with notes I have been receiving I am reinstating the forty meter net for us to test tomorrow. I moved the times back to where they have been in previous years. Hopefully conditions will be good enough to make cross continental contacts once again. Forty meters allows me more local contacts as well as areas I just cannot seem to reach on twenty meters. This will be a test but I expect it to work and will keep trying over the coming weeks. If necessary we can tweak the schedule somewhat but it is nice to have time to make and eat dinner between the two nets. Please join us tomorrow evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP relay help) Monday 0100z (Sunday 4 PM PDT) 14050 kHz Monday 0300z (Sunday 6 PM PDT) 7045 kHz Stay warm, Kevin. KD5ONS - __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
The KRC2 has on-chip pullups that handle the task. They are enabled whenever the KRC2 is in BCD input mode. Thus external pullups are NOT needed for the KRC2. The inputs are resistor-protected in case the driving device does power the pullups. We spec those inputs only for the TTL voltage range. -Jack Brindle, W6FB === On Mar 7, 2009, at 8:42 PM, Joe Subich, W4TV wrote: Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. Let's see ... that would apply to the KRC2 in the parallel input mode along with the W9XT BCD-10 and the Yaesu Quadra for starters. On the other hand the TopTen Systems BD-Y, the original microHAM Band Decoder, the Yaesu FL-7000, and Tokyo High Power HL-1.5Kfx, have internal pull-up resistors. 73, ... Joe, W4TV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Saturday, March 07, 2009 2:56 PM To: Roger Cc: elecraft Subject: Re: [Elecraft] [K3] Pull-up question Roger, That is where the situation gets 'sticky'. It all depends on what the circuits at the end away from the K3 have implemented. You have two pullup resistors on each line and 2 separate voltage sources. 1) If the voltage to the pullup resistors in the internal device do not match the voltage to the pullup resistors in the K3, there will be a continuous flow of current through both pullups on any one line when the drivers are at their open, non-conducting state). If the voltages are close to the same value, this may not cause a problem, but if they are quite different (say one is 12 volts and the other is 5 volts), that could create a big problem. 2) The drivers in the K3 (when at the low level) must carry the current provided by both pullup resistors. Whether that is a problem or not depends on the value of the pullup resistors and the current capability of the drivers. In my view of a good design, open collector (or open drain) drivers are the only thing to use. The terminating device can determine what voltage is needed for reliable switching at its input and that device controls the high level by providing its own pullup resistors. Secondly, the pullup values can be sized according to the high level input current required by that device and can control its immunity to noise by controlling its input conditions. All is under the control of the external device designer. Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. 73, Don W3FPR 73, Don W3FPR Roger wrote: Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Pull-up question
To add a bit more to Don's last point, there is a situation that few folks (especially engineers) realize with respect to interconnect drive systems. With todays low-power microcontrollers and digital systems, it is very easy to accidentally power another device from the driving device. In fact it is a pretty big problem in high- availability (usually telco) systems where one board is supposed to be powered off, but is being powered through it's I/O pins from another board. The two solutions to this are very similar, basically doing as Don suggests, using open-collector (or open-drain) drivers with pullups on the receiving board. This eliminates any chance of accidental power being applied to the receiving system. The second solution is to use opto-isolators to isolate the two boards, but this is really the same as #1 in that the receiving board provides the power. In this case the decoder could actually be powered by the K3 through its pullups, although they are limited by the high resistance of the pullups. In radios with true TTL drive there is much more power available to power a band decoder through its IO lines. We mitigate this in the KRC2 by providing series limit resistors which effectively limit the problem. It still exists, but at a much lower probability. So what is the real problem if this happens? The device will not be properly powered, so not all circuits will work. Worse, it will try to function, attempting to provide drive to other circuits even though not enough current is available. In the end, the poor microcontroller tends to toast itself. This is actually a very interesting area of study for systems that has emerged in the past several years, and as I noted is of great importance in the telco / high availability systems arena. -Jack Brindle, W6FB === On Mar 7, 2009, at 11:56 AM, Don Wilhelm wrote: Roger, That is where the situation gets 'sticky'. It all depends on what the circuits at the end away from the K3 have implemented. You have two pullup resistors on each line and 2 separate voltage sources. 1) If the voltage to the pullup resistors in the internal device do not match the voltage to the pullup resistors in the K3, there will be a continuous flow of current through both pullups on any one line when the drivers are at their open, non-conducting state). If the voltages are close to the same value, this may not cause a problem, but if they are quite different (say one is 12 volts and the other is 5 volts), that could create a big problem. 2) The drivers in the K3 (when at the low level) must carry the current provided by both pullup resistors. Whether that is a problem or not depends on the value of the pullup resistors and the current capability of the drivers. In my view of a good design, open collector (or open drain) drivers are the only thing to use. The terminating device can determine what voltage is needed for reliable switching at its input and that device controls the high level by providing its own pullup resistors. Secondly, the pullup values can be sized according to the high level input current required by that device and can control its immunity to noise by controlling its input conditions. All is under the control of the external device designer. Unfortunately, much of the ham gear available uses bare, open inputs and depends on the driving device to provide the voltage and levels it needs at its inputs. 73, Don W3FPR 73, Don W3FPR Roger wrote: Mike Fatchett, OK, but what happens when you use them with devices that already work without them,e.g. Array Solutions 6 Pack and early band decoders? Roger K8RS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2 missing part
Mine was the same as the others also. Mike WE0H Brett Gazdzinski wrote: I think I was scratching my head over the same choke, the manual and updates said it could be a different color, but it was the same as other chokes, and I was not actually short a choke. Brett N2DTS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K2] S/N 6698 is alive now!!!
Just got done testing the TX RX on K2 S/N 6698 and all is working per the manual. Now onto the options... Mike WE0H __ 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
