Re: [Elecraft] K3 - REF CAL Question
Let's see who first answers this one right (without looking at a thermometer!): There is one point on the scale of a thermometer where the temp in °C equals the temp in F. Which one is that? Feel free to prove mathematically... Enjoy! Glenn ON4WIX - Original Message - From: "Joe Subich, W4TV" <[EMAIL PROTECTED]> To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Cc: ; <[EMAIL PROTECTED]> Sent: Wednesday, June 18, 2008 12:58 AM Subject: RE: [Elecraft] K3 - REF CAL Question F to C is much slower, Not really ... (F - 30)/2 is generally within 10% and (F - 32) * 1.1 / 2 is within about 1%. Both are easy/quick. Unfortunately, mental math and estimation are skills that have been lost with the "calculator generation." 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson Sent: Tuesday, June 17, 2008 5:14 PM To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED] Subject: Re: [Elecraft] K3 - REF CAL Question > You have to do that with your calculator :-) C to F is fast and easy to do in your head. The "real" formula is: F = (1.8 * C) + 32 My mental algorithm is: double the value, subtract 10% (round it off, who cares if it is a degree or two off), add 30, then add 2 (if you feel the need for the extra precision). Most of us can double a number in our head pretty easily. Round it to the nearest 5 and then double it if you have trouble doubling 37 or 43 or 51. Hey! It's just the "two times" tables, which we all learned well before our 9th birthday. Doubling and then taking off 10% of the result is the same as multiplying by 1.8 (or 9/5 if you prefer) but a heckuva lot easier. I never did learn my "1.8 times" tables... Again, round it if you trip over something like 74 - 7.4. The answer is 66.6. But does it really matter if you decide to subtract 10 and get 64? Or subtract 7 and get 67? Subtract 30 then 2 rather than 32. Why? Because it is easier to not deal with the 1's digit until you have to. If you feel you have to. I find that I can usually work it out in my head in under a second and get within a few degrees of the "correct" result. Near enough for most needs. If I'm tired it might take 2 or even 3 seconds to make the conversion, especially if I refuse to round things off (being an engineer, I sometimes get anal about numbers, which is a good indicator I'm tired!). So, for example, let's take 52C. Is the PA too hot? The real method: 2 x 52 = 104. 104 - 10.4 = 94 (near enough) 94 + 30 = 124 124 + 2 = 126(if you really care...) If you'd rounded it: 2 x 50 = 100 100 - 10 = 90 90 + 30 = 120 120 + 2 = 122. Still close enough to decide if your finals are cooking! (They aren't). Would the 4 degree difference have made you change you mind about the safety of your PA transistors? I doubt it. F to C is much slower, but I rarely have to do that :-) Enjoy! Lyle KK7P ___ 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 No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.3.0/1505 - Release Date: 16/06/2008 7:20 ___ 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] K3 - REF CAL Question
Let's see who can answer this question first (without looking at a thermometer!): There is one point on the scale of a thermometer where the temp in Celsius and Farenheit are equal. Which one? Have fun, Glenn ON4WIX - Original Message - From: "Joe Subich, W4TV" <[EMAIL PROTECTED]> To: "'Lyle Johnson'" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Cc: ; <[EMAIL PROTECTED]> Sent: Wednesday, June 18, 2008 12:58 AM Subject: RE: [Elecraft] K3 - REF CAL Question F to C is much slower, Not really ... (F - 30)/2 is generally within 10% and (F - 32) * 1.1 / 2 is within about 1%. Both are easy/quick. Unfortunately, mental math and estimation are skills that have been lost with the "calculator generation." 73, ... Joe, W4TV -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson Sent: Tuesday, June 17, 2008 5:14 PM To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED] Subject: Re: [Elecraft] K3 - REF CAL Question > You have to do that with your calculator :-) C to F is fast and easy to do in your head. The "real" formula is: F = (1.8 * C) + 32 My mental algorithm is: double the value, subtract 10% (round it off, who cares if it is a degree or two off), add 30, then add 2 (if you feel the need for the extra precision). Most of us can double a number in our head pretty easily. Round it to the nearest 5 and then double it if you have trouble doubling 37 or 43 or 51. Hey! It's just the "two times" tables, which we all learned well before our 9th birthday. Doubling and then taking off 10% of the result is the same as multiplying by 1.8 (or 9/5 if you prefer) but a heckuva lot easier. I never did learn my "1.8 times" tables... Again, round it if you trip over something like 74 - 7.4. The answer is 66.6. But does it really matter if you decide to subtract 10 and get 64? Or subtract 7 and get 67? Subtract 30 then 2 rather than 32. Why? Because it is easier to not deal with the 1's digit until you have to. If you feel you have to. I find that I can usually work it out in my head in under a second and get within a few degrees of the "correct" result. Near enough for most needs. If I'm tired it might take 2 or even 3 seconds to make the conversion, especially if I refuse to round things off (being an engineer, I sometimes get anal about numbers, which is a good indicator I'm tired!). So, for example, let's take 52C. Is the PA too hot? The real method: 2 x 52 = 104. 104 - 10.4 = 94 (near enough) 94 + 30 = 124 124 + 2 = 126(if you really care...) If you'd rounded it: 2 x 50 = 100 100 - 10 = 90 90 + 30 = 120 120 + 2 = 122. Still close enough to decide if your finals are cooking! (They aren't). Would the 4 degree difference have made you change you mind about the safety of your PA transistors? I doubt it. F to C is much slower, but I rarely have to do that :-) Enjoy! Lyle KK7P ___ 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 No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.3.0/1505 - Release Date: 16/06/2008 7:20 ___ 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] RSGB RadCom K3 review posted on RSGB Members web page
Yes something isn´t right. This was his measurements: CLOSE-IN INTERMODULATION ON 7MHz band,500Hz bandwidth, CW preamp off 2.7 kHz roofing 1.8 kHz roofing 500 Hz roofing 2kHz +19dBm 101dB+12.5dBm 96dB+2.5dBm 88dB 3kHz +19dBm 101dB+12.5dBm 96dB+2.5dBm 88dB 5kHz +22dBm 103dB+12.5dBm 96dB+8.5dBm 92dB 7kHz +22dBm 103dB+12.5dBm 96dB+13dBm95dB 10kHz +22dBm 103dB+12.5dBm 96dB+17.5dBm 98dB 15kHz +22dBm 103dB+12.5dBm 96dB+22dBm 101dB 20kHz +22dBm 103dB+12.5dBm 96dB+25dBm 103dB 30kHz +22dBm 103dB+12.5dBm 96dB+26.5dBm 104dB 40kHz +22dBm 103dB+12.5dBm 96dB+27dBm 104dB 50kHz +22dBm 103dB+12.5dBm 96dB+27dBm 104dB He also wrote this: Third order intercept and dynamic range results were excellent, but results were a little dependent on which roofing filter was in circuit (see table). With the stock 2.7kHz filter, the intermodulation limited dynamic range held at over 100dB (in 500Hz DSP bandwidth) down to 2kHz spacing, probably the highest figure I have ever measured at this spacing. However, with the 500Hz 5 pole roofing filter, a degradation was seen at close spacings and non-linear effects such as hysteresis were also observed. A step drop in performance was triggered as the spacing was reduced, which did not follow the reverse pattern as the spacing was again increased. Now if something similar did happen in the Orion case a measurement error can be suspected. It isn´t logical to think two bad filters. de SM2EKM . Bill W4ZV wrote: Jan Erik Holm wrote: Interesting review. Considering IMDDR3 it seems like one should stay way from the 500 Hz filter, looks like the 400 Hz is the filter to get. I haven't read the review but he must have had a bad 500 Hz filter from what I've heard reported (i.e. the 2.7k better than the 500 Hz). That makes no sense and is contradictory to previous measurements by both Elecraft and Sherwood: Elecraft: Filter20kHz 10kHz 5kHz 2kHz 200 Hz, 5 pole100+ 100+ 100+ 95 250 Hz, 8 pole100+ 100+ 100+ 95 400 Hz, 8 pole100+ 100+ 100+ 95 500 Hz, 5 pole100+ 100+ 100+ 94 1 kHz, 8 pole 100+ 100+ 10094 2.7 kHz, 5 pole 100+ 98 92n/a 2.8 kHz, 8 pole 100+ 100 93n/a http://www.zerobeat.net/mediawiki/index.php/K3_Roofing_Filters Sherwood: Filter - IMD @ 2 kHz 500 Hz - 95 dB 400 Hz - 96 dB 200 Hz - 101 dB* *I listed the 200 Hz because it's a 5-pole filter (just like the 500 Hz) in case some believe there is an inherent problem with 5-pole filters. http://www.sherweng.com/table.html It's odd but Peter Hart reported something similar when he did Orion's review. The 2.4k filter was much better than the 1.0k, which again makes no sense unless the 1.0k was defective. I'm sure Peter reported what he measured but common sense would dictate that one should suspect something was wrong with the filter and request another when anomalous results like this are measured. It also reminds me when ARRL once reported better IMD performance with Preamp ON versus Preamp OFF. Common sense would say "TILT"! 73, Bill W4ZV ___ 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] SDR Adapter
Here is some more to chew on. ;-) http://tinyurl.com/6kmw4x I received my LP-PAN yesterday and got it working this evening. The good news is you will soon be able to enjoy the SDR interface with K3. The other news is that the audio that comes from the K3 speaker is vastly improved to the PC version. Maybe I have some dialing in to do, but I truly feel that Wayne and Lyle's work with the signal processing in the K3 hardware will be the gold standard for years to come. I keep in mind that the exact same IF goes to the K3 hardware and the PC through LP-PAN, but you don't find mojo in a PC... ;-) [Elecraft] SDR Adapter Wim K6TE kilo6te at yahoo.com Wed Jun 18 00:03:33 EDT 2008 http://www.softrockradio.org/ and this yahoo group (requiring membership) http://groups.yahoo.com/group/softrock40/ - Wim Jim Miller-14 wrote: > > Web site ? > 73, Jim > > -- View this message in context: http://www.nabble.com/SDR-Adapter-tp17957384p17959336.html Sent from the Elecraft mailing list archive at Nabble.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] K3: Synchronous AM Receive
Any progress on this yet please Elecraft? VK5ABQ. -- View this message in context: http://www.nabble.com/K3%3A-Synchronous-AM-Receive-tp17959523p17959523.html Sent from the Elecraft mailing list archive at Nabble.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] SDR Adapter
http://www.softrockradio.org/ and this yahoo group (requiring membership) http://groups.yahoo.com/group/softrock40/ - Wim Jim Miller-14 wrote: > > Web site ? > 73, Jim > > -- View this message in context: http://www.nabble.com/SDR-Adapter-tp17957384p17959336.html Sent from the Elecraft mailing list archive at Nabble.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] Katiegram
Received June 17 for Feb 2 order. K3/100,1.8, 400, 250 Hz filters, kxv3. Nothing backordered de Brian/K3KO -- View this message in context: http://www.nabble.com/Katiegram-tp17958913p17958913.html Sent from the Elecraft mailing list archive at Nabble.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] SDR Adapter
Web site ? 73, Jim - Original Message - From: "Brian Lloyd" <[EMAIL PROTECTED]> To: "Lee Buller" <[EMAIL PROTECTED]> Cc: "Elecraft Reflector" Sent: Tuesday, June 17, 2008 7:30 PM Subject: Re: [Elecraft] SDR Adapter > > On Jun 17, 2008, at 5:22 PM, Lee Buller wrote: > > > > > > > Not to step on any toes herebut, could a person use one of the > > Softrock SDR radios tuned to the IF of the K3 and have a panoramic > > view of the band? Anone doing that or am I missing something? That > > would be cool cause the Softrocks are rather inexpensive. > > Yes. Tony Parks actually makes versions of the Softrock just for use > with the K2 and K3. > > -- > > 73 de Brian, WB6RQN > Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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
Re: [Elecraft] RSGB RadCom K3 review posted on RSGB Members web page
Jan Erik Holm wrote: > > Interesting review. > > Considering IMDDR3 it seems like one should stay > way from the 500 Hz filter, looks like the 400 Hz > is the filter to get. > I haven't read the review but he must have had a bad 500 Hz filter from what I've heard reported (i.e. the 2.7k better than the 500 Hz). That makes no sense and is contradictory to previous measurements by both Elecraft and Sherwood: Elecraft: Filter20kHz 10kHz 5kHz 2kHz 200 Hz, 5 pole100+ 100+ 100+ 95 250 Hz, 8 pole100+ 100+ 100+ 95 400 Hz, 8 pole100+ 100+ 100+ 95 500 Hz, 5 pole100+ 100+ 100+ 94 1 kHz, 8 pole 100+ 100+ 10094 2.7 kHz, 5 pole 100+ 98 92n/a 2.8 kHz, 8 pole 100+ 100 93n/a http://www.zerobeat.net/mediawiki/index.php/K3_Roofing_Filters Sherwood: Filter - IMD @ 2 kHz 500 Hz - 95 dB 400 Hz - 96 dB 200 Hz - 101 dB* *I listed the 200 Hz because it's a 5-pole filter (just like the 500 Hz) in case some believe there is an inherent problem with 5-pole filters. http://www.sherweng.com/table.html It's odd but Peter Hart reported something similar when he did Orion's review. The 2.4k filter was much better than the 1.0k, which again makes no sense unless the 1.0k was defective. I'm sure Peter reported what he measured but common sense would dictate that one should suspect something was wrong with the filter and request another when anomalous results like this are measured. It also reminds me when ARRL once reported better IMD performance with Preamp ON versus Preamp OFF. Common sense would say "TILT"! 73, Bill W4ZV -- View this message in context: http://www.nabble.com/RSGB-RadCom-K3-review-posted-on-RSGB-Members-web-page-tp17869976p17958106.html Sent from the Elecraft mailing list archive at Nabble.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] [K3] Nit-pick about the TX LED
TX flashes when I hit my paddles, even in the absence of VOX or PTT. Shouldn't it flash only when the rig is really transmitting, or pretending to in TX TEST? Also, the ALC shows an indication if you have that on the meter display. There. I feel better now. Thanks for listening. 73, Carl WS7L K3 #486 ___ 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] SDR Adapter
On Jun 17, 2008, at 5:22 PM, Lee Buller wrote: Not to step on any toes herebut, could a person use one of the Softrock SDR radios tuned to the IF of the K3 and have a panoramic view of the band? Anone doing that or am I missing something? That would be cool cause the Softrocks are rather inexpensive. Yes. Tony Parks actually makes versions of the Softrock just for use with the K2 and K3. -- 73 de Brian, WB6RQN Brian Lloyd - brian HYPHEN wb6rqn AT lloyd DOT 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] SDR Adapter
Not to step on any toes herebut, could a person use one of the Softrock SDR radios tuned to the IF of the K3 and have a panoramic view of the band? Anone doing that or am I missing something? That would be cool cause the Softrocks are rather inexpensive. Lee - K0Wa In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? ___ 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] F to C
Just tattoo this onto your forearm - if the PA Temp is under 100F, don't worry about it. F C 200 93 195 91 190 88 185 85 180 82 175 79 170 77 165 74 160 71 155 68 150 66 145 63 140 60 135 57 130 54 125 52 120 49 115 46 110 43 105 41 100 38 ___ 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] K3 - REF CAL Question
> F to C is much slower, Not really ... (F - 30)/2 is generally within 10% and (F - 32) * 1.1 / 2 is within about 1%. Both are easy/quick. Unfortunately, mental math and estimation are skills that have been lost with the "calculator generation." 73, ... Joe, W4TV > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Lyle Johnson > Sent: Tuesday, June 17, 2008 5:14 PM > To: [EMAIL PROTECTED] > Cc: elecraft@mailman.qth.net; [EMAIL PROTECTED] > Subject: Re: [Elecraft] K3 - REF CAL Question > > > > You have to do that with your calculator :-) > > C to F is fast and easy to do in your head. > > The "real" formula is: > > F = (1.8 * C) + 32 > > My mental algorithm is: > > double the value, > subtract 10% (round it off, who cares if it is a degree or two off), > add 30, > then add 2 (if you feel the need for the extra precision). > > Most of us can double a number in our head pretty easily. > Round it to > the nearest 5 and then double it if you have trouble doubling > 37 or 43 > or 51. Hey! It's just the "two times" tables, which we all > learned well > before our 9th birthday. > > Doubling and then taking off 10% of the result is the same as > multiplying by 1.8 (or 9/5 if you prefer) but a heckuva lot > easier. I > never did learn my "1.8 times" tables... > > Again, round it if you trip over something like 74 - 7.4. > The answer is > 66.6. But does it really matter if you decide to subtract 10 and get > 64? Or subtract 7 and get 67? > > Subtract 30 then 2 rather than 32. Why? Because it is easier to not > deal with the 1's digit until you have to. If you feel you have to. > > I find that I can usually work it out in my head in under a > second and > get within a few degrees of the "correct" result. Near > enough for most > needs. If I'm tired it might take 2 or even 3 seconds to make the > conversion, especially if I refuse to round things off (being an > engineer, I sometimes get anal about numbers, which is a good > indicator > I'm tired!). > > So, for example, let's take 52C. Is the PA too hot? > > The real method: > > 2 x 52 = 104. > 104 - 10.4 = 94 (near enough) > 94 + 30 = 124 > 124 + 2 = 126(if you really care...) > > If you'd rounded it: > >2 x 50 = 100 > 100 - 10 = 90 > 90 + 30 = 120 > 120 + 2 = 122. > > Still close enough to decide if your finals are cooking! > (They aren't). > Would the 4 degree difference have made you change you mind > about the > safety of your PA transistors? I doubt it. > > F to C is much slower, but I rarely have to do that :-) > > Enjoy! > > Lyle KK7P > > ___ > 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] Fuses (WAS: Power cable question)
Granted, a fuse often isn't as fast a fuse as a small-signal transistor, but fuses do a good job saving power transformers, rectifiers, voltage regulators, and many other expensive and hard-to-replace parts in equipment. I'm no fuse designer, but I am aware that at least some fuse manufacturers recommend not exceeding 75% of the fuse rating in service and many won't guarantee their fuses to carry the rated current for long. Littlefuse, for example, only guarantees their fuses to last 4 hours running at 100% of their rated current. They might last thousands of hours at their rated current, or not. One thing I suspect causes failures in some systems I've worked on (radars, nav gear, commercial HF/VHF radios, etc.) is the turn-on surge current, which can be several times the normal current as capacitors charge, blowers come up to speed, etc. While the total surge may be within the fuse ratings for current vs. time, the repeated heavy "hits" don't do them any good. I've often suspected that is one significant cause of the fuse failures I've seen where the measured currents are quite normal once the fuse is replaced. Fuses may be shock-sensitive, sometimes surprisingly so. I've dropped a brand new just-checked fuse, picked it up and found the element cracked or broken although the glass tube was not damaged. (Murphy dictates that the most shock-sensitive fuse is the last one you have within an hour's travel). These are brand-name, normally excellent quality fuses too. I treat the replacement fuses in my kit just like I'd care for an incandescent bulb or vacuum tube. Ron AC7AC -Original Message- On Jun 16, 2008, at 9:59 PM, <[EMAIL PROTECTED]> <[EMAIL PROTECTED] > wrote: > A regular fuse should blow at 2.6 x the rating within 30s, in other > words very slowly. It's only a short circuit that will normally > blow a new fuse. Have not seen any data on old fuses which might > get metal fatigue. There are faster fuses, but the fastest are rf > transistors - on three legs anyway... Most people don't know that the purpose of a fuse or circuit breaker is to protect the power distribution wiring, not the electronic component itself. Wire will carry a surge without too much temperature rise. The idea is that the fuse will blow or the breaker open before there is any chance of damage to the wire. This means that a fuse or breaker cannot protect your active devices. If you want that level of protection you need something like a power supply with fold-back current limiting. Brian Lloyd ___ 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] K3 - REF CAL Question
I will still use F = (1.8 * (C+40)) - 40 -- as I said, I have more trouble remembering whether to add or subtract the 32. Similarly, C = (F+40)/1.8 -40, so it is not so complicated after all. Dividing by 1.8 is similarly easy to do in the head - divide by 2 and then add 10% of the result - it is not exact, but close enough for 'government work'. 73, Don W3FPR Lyle Johnson wrote: You have to do that with your calculator :-) C to F is fast and easy to do in your head. The "real" formula is: F = (1.8 * C) + 32 My mental algorithm is: double the value, subtract 10% (round it off, who cares if it is a degree or two off), add 30, then add 2 (if you feel the need for the extra precision). Most of us can double a number in our head pretty easily. Round it to the nearest 5 and then double it if you have trouble doubling 37 or 43 or 51. Hey! It's just the "two times" tables, which we all learned well before our 9th birthday. Doubling and then taking off 10% of the result is the same as multiplying by 1.8 (or 9/5 if you prefer) but a heckuva lot easier. I never did learn my "1.8 times" tables... Again, round it if you trip over something like 74 - 7.4. The answer is 66.6. But does it really matter if you decide to subtract 10 and get 64? Or subtract 7 and get 67? Subtract 30 then 2 rather than 32. Why? Because it is easier to not deal with the 1's digit until you have to. If you feel you have to. I find that I can usually work it out in my head in under a second and get within a few degrees of the "correct" result. Near enough for most needs. If I'm tired it might take 2 or even 3 seconds to make the conversion, especially if I refuse to round things off (being an engineer, I sometimes get anal about numbers, which is a good indicator I'm tired!). So, for example, let's take 52C. Is the PA too hot? The real method: 2 x 52 = 104. 104 - 10.4 = 94 (near enough) 94 + 30 = 124 124 + 2 = 126(if you really care...) If you'd rounded it: 2 x 50 = 100 100 - 10 = 90 90 + 30 = 120 120 + 2 = 122. Still close enough to decide if your finals are cooking! (They aren't). Would the 4 degree difference have made you change you mind about the safety of your PA transistors? I doubt it. F to C is much slower, but I rarely have to do that :-) Enjoy! Lyle KK7P ___ 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 No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.3.0/1505 - Release Date: 6/16/2008 7:20 AM ___ 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] K3 - REF CAL Question
Subtract 30 then 2 rather than 32. Add 30 then 2... It was a test... 73, Lyle KK7P ___ 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] K3 - REF CAL Question
Google works great for this: Fahrenheit to Celsius 90f in c Celsius to F: 23c in f On Jun 17, 2008, at 4:38 PM, Don Wilhelm wrote: Paul, You have to do that with your calculator :-) . I never can remember when to add 32 and when to subtract 32, so I use a slightly different method which relies on the fact that both the F and C scales coincide at -40 deg. Add 40 first - then multiply by 5/9 (multiply by 5 and divide by 9) if converting from F to C (9/5 when converting from C to F), then subtract 40 and you will have the converted result. Remembering whether to use 5/9 or 9/5 is easy too - if the result you want is the C scale, the number will be smaller, so use 5/9. When the result is in deg F, the number must be larger, so use 9/5. 73, Don W3FPR [EMAIL PROTECTED] wrote: The technical menu needs to be turned on in order to view the PA temp, etc. How do you switch the temperatures to Fahrenheit? Paul N4LCD ___ 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] K3 - REF CAL Question
You have to do that with your calculator :-) C to F is fast and easy to do in your head. The "real" formula is: F = (1.8 * C) + 32 My mental algorithm is: double the value, subtract 10% (round it off, who cares if it is a degree or two off), add 30, then add 2 (if you feel the need for the extra precision). Most of us can double a number in our head pretty easily. Round it to the nearest 5 and then double it if you have trouble doubling 37 or 43 or 51. Hey! It's just the "two times" tables, which we all learned well before our 9th birthday. Doubling and then taking off 10% of the result is the same as multiplying by 1.8 (or 9/5 if you prefer) but a heckuva lot easier. I never did learn my "1.8 times" tables... Again, round it if you trip over something like 74 - 7.4. The answer is 66.6. But does it really matter if you decide to subtract 10 and get 64? Or subtract 7 and get 67? Subtract 30 then 2 rather than 32. Why? Because it is easier to not deal with the 1's digit until you have to. If you feel you have to. I find that I can usually work it out in my head in under a second and get within a few degrees of the "correct" result. Near enough for most needs. If I'm tired it might take 2 or even 3 seconds to make the conversion, especially if I refuse to round things off (being an engineer, I sometimes get anal about numbers, which is a good indicator I'm tired!). So, for example, let's take 52C. Is the PA too hot? The real method: 2 x 52 = 104. 104 - 10.4 = 94 (near enough) 94 + 30 = 124 124 + 2 = 126(if you really care...) If you'd rounded it: 2 x 50 = 100 100 - 10 = 90 90 + 30 = 120 120 + 2 = 122. Still close enough to decide if your finals are cooking! (They aren't). Would the 4 degree difference have made you change you mind about the safety of your PA transistors? I doubt it. F to C is much slower, but I rarely have to do that :-) Enjoy! Lyle KK7P ___ 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] N2CQ QRP Contest Calendar: June 18 - July 30, 2008
~ N2CQ QRP CONTEST CALENDAR June 18 - July 30, 2008 ~ NAQCC Straight Key/Bug mW Sprint (CW) *** QRPp CONTEST *** June 18, 0130z to 0230z Rules: http://www.arm-tek.net/~yoel/contests.html ~ AGCW VHF/UHF CW Contest ... QRP Category June 21, 1600z to 1900z (144 Mhz) June 21, 1900z to 2100z (432 Mhz) Rules: http://www.agcw.org/en/?Contests:VHF-UHF_Contest ~ SKCC Sprint (Straight Key CW) ... QRP Awards June 25, z to 0200z Rules: http://www.skccgroup.com/sprint/sks/ ~ Marconi Memorial Contest (CW) ... QRP Category June 28, 1400z to June 29, 1400z Rules: http://www.arifano.it/Contest_Marconi.htm ~ ARRL Field Day (CW/SSB/RTTY)... QRP Category June 28, 1800z to June 29, 2100z Rules: http://www.arrl.org/contests/rules/2008/fd.html ~ QRP ARCI Milliwatt Field Day (ALL)... QRP Contest! June 28, 1800z to June 29, 2100z Rules: http://www.qrparci.org ~ MQFD Monthly Sprint (CW/PH/Digital) *** QRP Contest *** June 28, 1800z to 2200z Rules: http://w2agn.net/mqfdsprint.html ~ RAC Canada Day Contest (CW/SSB) ... QRP Category Jul 1, z to 2359z Rules: http://www.rac.ca/service/contesting/ ~ Summer FOX Hunt - QRP 20M CW EDT: Tue Jul 1. 9 PM to 1029 PM UTC: Wed Jul 2, 0100z to 0229z Info: http://www.qrpfoxhunt.org/ ~ MI QRP Fourth of July Sprint (CW) ... QRP Contest! Jul 4, 2300z to Jul 5, 0300z Rules: http://www.qsl.net/miqrpclub/contest.html ~ VK/trans-Tasman Contests (160m Ph) ... QRP Category Jul 5, 0800z to 1400z Rules: http://home.iprimus.com.au/vktasman/RULES.HTM ~ Adventure Radio Spartan Sprint (CW) ... QRP Event! Jul 8, 0100z to 0300z(First Monday 9 PM EDT) Info: http://arsqrp.pbwiki.com/Spartan+Sprints ~ Summer FOX Hunt - QRP 20M CW EDT: Tue Jul 8. 9 PM to 1029 PM UTC: Wed Jul 9, 0100z to 0229z Info: http://www.qrpfoxhunt.org/ ~ FISTS Summer Sprint (CW) ... QRP Category Jul 11, 2000 EDT to 2400 EDT Rules: http://www.fists.org/sprints.html ~ IARU HF World Championship (CW/SSB) ... QRP Category Jul 12, 1200z to Jul 13, 1200z Rules: http://www.arrl.org/contests/rules/2008/iaru.html ~ QRP ARCI Summer Homebrew Sprint (CW) ... QRP Contest! Jul 13, 2000z to 2359z Rules: http://www.qrparci.org ~ SKCC Weekend Sprintathon (Straight Key CW) ... QRP Category Jul 13, z to 2359z Rules: http://www.skccgroup.com/sprint/wes/ ~ Summer FOX Hunt - QRP 20M CW EDT: Tue Jul 15. 9 PM to 1029 PM UTC: Wed Jul 16, 0100z to 0229z Info: http://www.qrpfoxhunt.org/ ~ NAQCC Straight Key/Bug Sprint *** QRP CONTEST! *** EDT: Jul 16, 8:30 PM to 10:30 PM UTC: Jul 17, 0030z to 0230z Rules: http://www.arm-tek.net/~yoel/contests.html ~ VK/trans-Tasman Contests (160m CW) ... QRP Category Jul 19, 0900z to 1300z Rules: http://home.iprimus.com.au/vktasman/RULES.HTM ~ North American QSO Party (RTTY) /QRP Entries Noted Jul 19, 1800Z to Jul 20, 0600Z Rules: http://www.ncjweb.com/naqprules.php ~ CQ WW VHF Contest (All, 6 & 2 Meters) ... QRP (10W) Category Jul 19, 1800z to Jul 20, 2100z Rules: http://www.cq-amateur-radio.com/awards.html ~ RSGB Low Power Field Day (CW) ...QRP Contest! Jul 20, 0900z to 1200z Jul 20, 1300z to 1600z Rules: http://www.vhfcc.org/hfcc/calendar07.shtml ~ Colorado Gold Rush (20 mtr CW QRP) ... QRP Contest July 20, 2000z to 2159z Rules: http://www.cqc.org/contests/gold2008.htm ~ RUN FOR THE BACON (CW) *** QRP CONTEST *** EDT: Jul 20, 9 PM to 11 PM UTC: Jul 21, 0100z 0300z Rules: http://fpqrp.net:80/fpqrprun.php ~ SKCC S
Re: [Elecraft] KPA100/Kat100
David, If you want to do it without purchasing any new parts, just remove the KPA100 from the EC2 enclosure and mount it on top of the K2. Use the top cover from the K2 to fill the big hole in th etop of the EC2 enclosure with the KAT100 still inside. OTOH, if you require the short height KAT100, you will have to obtain the KAT100-1 enclosure hardware. It is not a difficult task at all. 73, Don W3FPR David N. wrote: I picked up KPA100/KAT100 in an EC2 case how do I want to divorce them to install the KPA100 into the K2 to make it a K2-100 and leave the KAT100 alone tuner only. Has anyone on the reflector done this yet? I thought I would ask before tearing into it. David KR4OW ___ 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] K3 - REF CAL Question
Paul, You have to do that with your calculator :-) . I never can remember when to add 32 and when to subtract 32, so I use a slightly different method which relies on the fact that both the F and C scales coincide at -40 deg. Add 40 first - then multiply by 5/9 (multiply by 5 and divide by 9) if converting from F to C (9/5 when converting from C to F), then subtract 40 and you will have the converted result. Remembering whether to use 5/9 or 9/5 is easy too - if the result you want is the C scale, the number will be smaller, so use 5/9. When the result is in deg F, the number must be larger, so use 9/5. 73, Don W3FPR [EMAIL PROTECTED] wrote: The technical menu needs to be turned on in order to view the PA temp, etc. How do you switch the temperatures to Fahrenheit? Paul N4LCD ___ 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] OT - Antennex
The prefetch is what is getting you. They have a "Hoover-trap" built into their pages with a link which MUST_NOT_BE_FOLLOWED. IF you follow it (or the pre-fetch does), you are deep-sixed by IP and you get the Mass Downloading notice. I'm not sure why it is working for one and not the other unless Mozilla is the source of the pre-fetch. 73, Clark N8CBW On 2008-06-17, Mike Harris <[EMAIL PROTECTED]> wrote: > Good day, > > Many thanks to all who replied. I have tested with our ISP and they get > the same result as I do using IE6 & IE7. Mozilla seems to work OK. > > Very odd. They use some pre fetch for their cache but you would think > that would affect both browsers. I routinely scan for spy-ware. > > Anyway, again thanks, something I will have to ponder. > > Regards, > > Mike VP8NO ___ 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 - Front Panel - Nothing on LCD
Ian, Glad you found it. Keep warm down there! Yes, soldering is *the* most common builder problem. When in doubt, check the soldering, then re-check the soldering, and when that is done - check the soldering. For those just starting to build, use an iron temperature at about 750 degrees F (800 for the KPA100), and watch carefully for the solder to flow - if you do not see the solder wicked into the thru-plated hole, it is not a good solder connection. Use a small diameter solder to assist in controlling the amount (I prefer .015 inch diameter in a 63/37 alloy with a midly activated rosin flux). Too much solder can be just as bad as not enough. 73, Don W3FPR Ian Nightingale wrote: Hi Don, I bow to your genius. The problem appears to be a soldering issue with the main chip. I was very lucky in that I was able to remove the solder from one side of the LCD and lift it up enough to get to the chip soldering points. A re-solder of each pin and all is well with the world. Very lucky, as the next post for me arrives late October. I wonder if it would be worth adding a test stage pre-LCD install to prevent juniors like myself going down this route. Hopefully I'll have time to complete in the next few weeks and be transmitting from the hills of Adelaide Island when the sun comes back. Many thanks again 73, Ian - VP8ROT (G0VZM) 7:20 AM ___ 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] K3 Suggestion - Spot/Pitch
FWIW, another suggestion for the pile... While tuning some weak CW with my new K3 it occurred to me that the ability to vary the pitch of received signals might be userful. Under marginal conditions this might prove handy in optimizing a weak signal. Of course, we have the PITCH control-- but when it is activated the sidetone comes on and the received audio is cut off. I suggest that the sidetone should be absent and the received audio should be heard when PITCH is activated. Then by varying VFOB one can directly alter the pitch of the signal(s). Now, since VFOB has no function while SPOT is on, perhaps it could be used to vary the sidetone pitch. In short... PITCH would allow you to directly vary the pitch of received signals while listening to them, while SPOT would allow you to vary the pitch of the sidetone. 73, Drew AF2Z ___ 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] K3 Second Rx
I just ordered a K3 sub receiver. Katie says it should come in August or September. Mike Scott - AE6WA Tarzana, CA (DM04 / near LA) K3-100 #508/ KX1 #1311 ___ 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] OT - Antennex
Good day, Many thanks to all who replied. I have tested with our ISP and they get the same result as I do using IE6 & IE7. Mozilla seems to work OK. Very odd. They use some pre fetch for their cache but you would think that would affect both browsers. I routinely scan for spy-ware. Anyway, again thanks, something I will have to ponder. Regards, Mike VP8NO ___ 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] [K3] Hi - Lo Cut V2.02
When I tap the Hi Width knob with Version 2.02, Both the Lo and Hi Cut are engaged... SHIFT/WIDTH and HI CUT/LO CUT they are ganged together and always have been. 73, Lyle KK7P ___ 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] K3: Power cable question
On Jun 16, 2008, at 9:59 PM, <[EMAIL PROTECTED]> <[EMAIL PROTECTED] > wrote: A regular fuse should blow at 2.6 x the rating within 30s, in other words very slowly. It's only a short circuit that will normally blow a new fuse. Have not seen any data on old fuses which might get metal fatigue. There are faster fuses, but the fastest are rf transistors - on three legs anyway... Most people don't know that the purpose of a fuse or circuit breaker is to protect the power distribution wiring, not the electronic component itself. Wire will carry a surge without too much temperature rise. The idea is that the fuse will blow or the breaker open before there is any chance of damage to the wire. This means that a fuse or breaker cannot protect your active devices. If you want that level of protection you need something like a power supply with fold-back current limiting. Brian Lloyd Granite Bay Montessori School 9330 Sierra College Bl brian AT gbmontessori DOT com Roseville, CA 95661 +1.916.367.2131 (voice)+1.791.912.8170 (fax) PGP key ID: 12095C52A32A1B6C PGP key fingerprint: 3B1D BA11 4913 3254 B6E0 CC09 1209 5C52 A32A 1B6C ___ 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] [K3] Hi - Lo Cut V2.02
When I tab the Hi Width knob with Version 2.02, Both the Lo and Hi Cut are engaged. Did this change? I thought that they were independent whereby tabbing Hi Cut only engaged the Hi Cut and left the Shift on. Roland NA5Q K3 845 ___ 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] KPA100/Kat100
I picked up KPA100/KAT100 in an EC2 case how do I want to divorce them to install the KPA100 into the K2 to make it a K2-100 and leave the KAT100 alone tuner only. Has anyone on the reflector done this yet? I thought I would ask before tearing into it. David KR4OW ___ 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] K3 - REF CAL Question
On Tue, Jun 17, 2008 at 12:12 PM, Tom Childers, N5GE <[EMAIL PROTECTED]> wrote: > On Tue, 17 Jun 2008 10:42:53 -0400, [EMAIL PROTECTED] wrote: >> >>How do you switch the temperatures to Fahrenheit? >> >>Paul N4LCD I think transistors work in Celsius, while vacuum tubes / valves work in Fahrenheit. :-) (As far as I know, Tom is right, good old fashion arithmetic is required) -Michael, VE3TIX ___ 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] K3 - REF CAL Question
On Tue, 17 Jun 2008 10:42:53 -0400, [EMAIL PROTECTED] wrote: > > > >>The technical menu needs to be turned on in order to view the PA temp, etc. > >How do you switch the temperatures to Fahrenheit? > >Paul N4LCD > [snip] You can't. You have to do the calculation shown on page 51 of the owner's manual in the FP TEMP section. 73, Tom, N5GE - SWOT 3537 - Grid EM12jq "Those who would give up Essential Liberty to purchase a little Temporary Safety deserve neither Liberty nor Safety" An excerpt from a letter written in 1755 from the Assembly to the Governor of Pennsylvania. Support the entire Constitution, not just the parts you like. http://www.n5ge.com http://www.eQSL.cc/Member.cfm?N5GE ___ 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
All Sales Stateside only! New unbuilt kit KAT100-1 150W External ATU for the K2 $220 + Shipping New unbuilt kit KPA100 100W PA option for the K2 comes with KPA100UPKT KPA upgrade kit and complete with shield kit. $390 + Shipping List of other Ham Stuff on request Please inquire direct to Stephen [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] K3 Firmware Release Notes
Craig: You can open the hfwnotes.rtf file (in your firmware folder) with WordPad (a standard Windows accessory) or Word and print from there. Dick, K6KR -- Original message -- From: "Craig D. Smith" <[EMAIL PROTECTED]> > I've just upgraded my K3 firmware and would like to get a printout of the > release notes so that I can sort through all the changes since the version > 1.78/1.58 that I had installed previously. The release notes appear, as > advertised, in the help menu of the download utility. But how do I print > them out?? Not everyone who buys an Elecraft radio is a computer expert - > especially me! Can someone give me a clue as to how to get a printout? If > printing from the download utility isn't possible, could Elecraft post the > release notes as a pdf on their web page? > > Thanks and 73 > Craig AC0DS > > > > ___ > 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] OT - Antennex
Mike Harris wrote: Good day, Could someone please test the Antennex URL: http://www.antennex.com/shopping.htm With that or even http://www.antennex.com all I can get is a warning about not mass downloading with no further access. These worked fine with IE6 and with Firefox. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ 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] OT - Antennex
Hello Mike It works fine for me using Firefox 2 (my standard browser) and IE7. I run "No Script" in Firefox, the site looks fine without using Java or Java Script (blocked by default when using No Script), so not idea why it didn't work for you... 73 Dave, G4AON -- Good day, Could someone please test the Antennex URL: http://www.antennex.com/shopping.htm ___ 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] K3 - REF CAL Question
The technical menu needs to be turned on in order to view the PA temp, etc. How do you switch the temperatures to Fahrenheit? Paul N4LCD ___ 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] K3 Firmware Release Notes
Thanks, Tom and both Kens, for the info and pdf version of the notes. That was exactly what I was looking for, and good to know where they reside in my computer since there is no print function on that part of the download utility. Thanks again for your complete and rapid answers!! 73 ... Craig AC0DS ___ 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] K3 Auto Notch
I was talking with an average power of 4 Watts from Georgia to a fellow in Vermont, and a very loud tuner-upper dropped in. I hit the K3's Auto Notch and he completely disappeared. The notching was so complete that I turned it off to see if the tuner-upper had actually quit tuning, or if the Auto-Notch was just doing a great job. He hadn't stopped tuning. Paul N4LCD ___ 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] K3 Firmware Release Notes
I've just upgraded my K3 firmware and would like to get a printout of the release notes so that I can sort through all the changes since the version 1.78/1.58 that I had installed previously. The release notes appear, as advertised, in the help menu of the download utility. But how do I print them out?? Not everyone who buys an Elecraft radio is a computer expert - especially me! Can someone give me a clue as to how to get a printout? If printing from the download utility isn't possible, could Elecraft post the release notes as a pdf on their web page? Thanks and 73 Craig AC0DS ___ 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: Possible K3 2.02 Firmware Bug....
Mike, Every computer I've owned fires pins on the serial, parallel and USB ports as it checks itself out on start up. This has nothing to do with the K3. You can turn off VOX when you start the computer and you won't transmit via your serial/LPT/USB ports. 73, Bob K5WA Has anyone else noticed that when in CW mode and in RX, if you turn on your computer which is connected to the rig or disconnect the USB cable the rig will start sending da's continuously? My conditions are K3 firmware 2.02 Windows XP home edition and a USB/serial converter. This strange operation has been happening also when I wake my laptop from "sleep mode". Mike N8XPQ K3 #248 ___ 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] KPA3 problem solved!
Oops! The problem I reported earlier today (K3 shutting off when keyed at high power) was caused by current limiting of my Astron VS-35M power supply. Before getting the K3, I was just using this supply for low power station accessories and my K2/10, so I had adjusted the current limiting way down for safety. Cranking the current limit knob fully clockwise solved my problem-- the K3 now puts out a full 100 watts to my antenna. Sorry for the panic! Now to enjoy using my new K3! 73, Chuck Guenther NI0C K2/10 s/n 5853 K3/100 s/n 1061 ___ 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] OT - Antennex
Good day, Could someone please test the Antennex URL: http://www.antennex.com/shopping.htm With that or even http://www.antennex.com all I can get is a warning about not mass downloading with no further access. The reply I received to a direct query is: <> It's something, like an addon in your browser. Nothing wrong with the site. All standard Mozilla-type browser work fine. Try a different browser perhaps. All the best, Rosetta (Rosie) Stone <> I run IE6 without any add-on's which works perfectly OK with every other site I try. I can't believe this site could be so specific with respect to browser and neither am I that bothered to want to install another. Regards, Mike VP8NO ___ 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] RSGB RadCom K3 review posted on RSGB Members web page
H! Makes me feel like I knew something when I decided to get the 400 hz filter instead of the 500 hz filter! As far as power settings, I usually like to follow a self imposed rule of never running a transceiver at more than 85% of "maximum". It probably is meaningless in many cases as far as really being a safety valve, but I figure that less than maximum strain ought to have some beneficial effect on the finals, etc. It probably sounds very arbitrary, but I follow this same rule in lots of things--even other than ham radio. In golf, for instance, I find that swinging the club at about 80-85% of what might be my maximum results in better contact and consistency. As far as the receiving station is concerned, 80 or 85 watts vs. 100 watts should be imperceptible. Although the K3 may not be one of them, there are lots of rigs out there that are very closely spec'd, either as to the finals, or the filters, etc. Some rigs have lots of "cushion"--the older TS-50 comes to mind, which apparently could easily run 200 watts or more with the finals in that rig. Some folks were actually cranking them up to that or higher! But nobody seemed to be too concerned about what the bandpass filters could handle, etc., and that bothered me enough to resist the temptation. So, I usually set my K3 at around 85 watts if I'm running QRO. Ignorance is bliss sometimes! Dave W7AQK - Original Message - From: "Jan Erik Holm" <[EMAIL PROTECTED]> Cc: Sent: Monday, June 16, 2008 10:19 PM Subject: Re: [Elecraft] RSGB RadCom K3 review posted on RSGB Members web page Interesting review. Considering IMDDR3 it seems like one should stay way from the 500 Hz filter, looks like the 400 Hz is the filter to get. Also the TX probably shouldn´t be cranked up to 120W but instead 100W should be maximum. 73 Jim SM2EKM -- Dave G4AON wrote: For those who are RSGB members, see: http://www.rsgb.org/membersonly/publications/reviews/index.php The K3 review by Peter Hart has just been posted. As it is copyright RSGB, so I can't quote much of it, but Peter concludes with: "The K3 is an impressive radio, which has attracted much interest and orders. One of the leading radios for close-in dynamic range and with excellent features, it is an ideal radio for use at home, field day or DXpeditions" 73 Dave, G4AON K3/100 #80 ___ 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] K1 - Front Panel - Nothing on LCD
Hi Don, I bow to your genius. The problem appears to be a soldering issue with the main chip. I was very lucky in that I was able to remove the solder from one side of the LCD and lift it up enough to get to the chip soldering points. A re-solder of each pin and all is well with the world. Very lucky, as the next post for me arrives late October. I wonder if it would be worth adding a test stage pre-LCD install to prevent juniors like myself going down this route. Hopefully I'll have time to complete in the next few weeks and be transmitting from the hills of Adelaide Island when the sun comes back. Many thanks again 73, Ian - VP8ROT (G0VZM) - Original Message From: Don Wilhelm <[EMAIL PROTECTED]> To: VP8ROT <[EMAIL PROTECTED]> Cc: elecraft@mailman.qth.net Sent: Tuesday, 10 June, 2008 12:45:35 PM Subject: Re: [Elecraft] K1 - Front Panel - Nothing on LCD Ian, The very most likely problem is that you have a soldering joint failure. Look very critically at your solder connections. Is there just a slight bit more solder applied than that required to fill the thru-plated hole? Do all the solder joints have a smooth concave slope on the sides? Do the edges of the solder joint taper out to an almost invisible edge on both the solder pad and the component lead? If the answer to any of the above questions is yes, then your soldering is certainly suspect. You must apply enough heat to cause the solder to flow out onto the solder pad and down into the thru-plated hole. Any solder connections that have a blob of solder on them are not well soldered connections. An excess of solder can hide a poorly soldered joint, and in fact is the usual appearance of a bad solder joint. Review the figures in the soldering tutorial on the Elecraft website if necessary. 73, Don W3FPR VP8ROT wrote: > Hello, I am building a K1 and have come up against a problem I can't solve at > the " Alignment and Test, part 1". > > Here you power the K1 for the first time with the RF, filter and front > boards connected. After the LEDs do their test the LCD screen should show an > error code. Nothing appears on my screen. > > I have checked all chip orientations and to the best of my knowledge check > for shorts on the switches (they go from + volts to zero when pressed). > There are no obvious solder problems on the board. > > Please could someone suggest any tests I should perform to find the source > of my problem. > > Many thanks, > > Ian, VP8ROT > Rothera > Antarctica > > ___ 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] K3 s/n 1061 build glitches
The trouble I reported yesterday (low receive sensitivity with coax shield connected) disappeared after I performed the Tx gain calibration procedure (at low power). So I installed the KPA3 100 watt amplifier module, but now the rig shuts down completely if I key it at any power level requiring the KPA3 (i.e. above 12 watts). It does this with two different well matched antennas and with a 50 ohm dummy load. 73, Chuck NI0C ___ 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] K3: Power cable question
Hi Ron, Thanks for the analysis. You pointed out several things I was unaware of related to these types of fuses. Nice to learn something new! I'm in the process of redoing the power distribution in my shack, so will take this info into account. Fortunately, it's been a while since I've blown any fuse. Cheers, Julius Julius Fazekas N2WN Tennessee Contest Group TnQP http://www.tnqp.org/ Elecraft K2/100 #3311 Elecraft K2/100 #4455 Elecraft K3/100 #366 ___ 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] Low receive sensitivity on new K3
Are you SURE the antenna is working fine with the other rigs? George On Mon, Jun 16, 2008 at 6:44 PM, ni0c <[EMAIL PROTECTED]> wrote: > I've completed the initial build of K3 > s/n 1061 and am having trouble receiving > anything. The receiver perks up a lot > when I just connect the center pin of my > coax to the ANT1 jack. It goes dead > completely as soon as the shield makes > contact with the connector. > My antenna works fine on my other rigs. > > I have the KANT3 module in the K3 > (no antenna tuner). > > The ANT1 input reads a dead short > with an ohmmeter. > > I have completed the VCO cal, > filter settings and enabling, etc. as > outlined in the manual. > > Any help would be appreciated. > I'm suspecting the trouble is in the > KANT3 module. > > 73, > Chuck Guenther NI0C > ___ > 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] Nabble 2
If you use Nabble to read this reflector then you'll probably have noticed that Nabble 2 has just been released. I'm not sure when the Elecraft list will move over, but when it does you will need to re-register with Nabble 2. (Use the same email address you are registered with the reflector, so that any postings you make are accepted by the reflector.) Hopefully the new version will fix the broken threading that has been apparent with the old one. You can even upload a picture to appear next to your postings! With a snippet of code the Nabble forum can be embedded in a web page, so perhaps it will be possible to access it through the Elecraft website in the near future? - Julian, G4ILO K3 s/n: 222 K2 s/n: 392 G4ILO's Shack: www.g4ilo.com Zerobeat Ham Forums: www.zerobeat.net/smf -- View this message in context: http://www.nabble.com/Nabble-2-tp17881717p17881717.html Sent from the Elecraft mailing list archive at Nabble.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
