[Elecraft] Tuner losses
I bought the KAT100 tuner as a convenience item and did not think it would be as efficient as other tuners in the shack. I judge the merit of tuners by measuring the RF current in the ladder line going to my 234 foot open loop around the house. It is a beast to feed on 160 and 40 meters, and much easier on all the other bands. I have the actual conjugate impedance measurements on all the bands around here somewhere, but lucky for the group, I can't find my data at the moment. I have measured current using thermocouple and home- built clamp-on ammeters. My Palstar AT1500BAL is a no-compromise balanced output tuner. There is a 1:1 balun on the input and the tuner consists of an L circuit for each side of the feedline. It is configurable for high and low impedances, with very heavy duty relays changing the variable capacitors from the input of the inductor to the output. It has beat out the 300 watt version of the Johnson Matchbox. I have not had access to the KW version, but an article by Frank Witt in QST several years ago showed the 300 watt version to be superior to its big brother. The Palstar has also beat my MFJ KW tuner that I have used floating from ground with a 1:1 balun at the input. There was no balun at the output and the MFJ was more efficient in that configuration than using the built-in 4:1 balun. (See the ARRL Antenna Compendium Volume 2, page 172, Some Additional Aspects of the Balun Problem.) I was quite surprised to see the KAT100 tuner to put out essentially the same currents on all bands as the Palstar balanced tuner! So a convenience it is, but also it is a good tuner! I have also used it, at Wayne's suggestion, to feed a portable 23 foot vertical with elevated 23 foot radials fed with 300 ohm ladder line and 1:1 balun on the output of the K2. This is antenna is used on 40 through 10 meters and has won me thousands of QSO's. There I have measured current at the base of the vertical radiator. The Elecraft tuner beat my manual 300 watt MFJ tuner feeding the antenna directly at the base. It also outperforms the LDG RT-11 also at the base of that vertical with no feeline between the tuner and antenna. I still use the giant Palstar as the KAT100 won't work with my Sierra or my KW Japan Radio linear! For the K2 barefoot, the KAT100 can't be beat, as far as I can see. Andy W9NJY Milwaukee K2 ser 2651 ___ 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] DL1 20W Dummy Load
I was doing a calibration of a KAT2 I just built and had a significant error to adjust for Forward power (displayed power was ~30% of measured). When I looked closely at the DL1 I noticed the trace to the detector comes from the center of the 50 ohm load. That means the detected voltage is across 1/2 the load (25 ohms) and changes the power calc to V^2/25 = P vs. of V^2/50 = P. Can someone confirm this? Thanks... Bruce Bowman NM5B Sasnta Fe, NM ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
I caught the segment you guys smoked em Great job of staying with the message even thru the crowd noise When you raised your hand that you were done the kids expression was amazing He could not believe you guys were already done Thanks for the great exposure about morse code Oh and the telegrapher outfits were great !! I would say you guys were running about 30 wpm K9NX Jonesy K2 #4491 9 Land the Black Hole of RF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Miller, K6CTW Sent: Friday, May 13, 2005 10:13 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th All, Tonight Chip, K7JA and I, K6CTW will be having a contest on The Tonight Show with Jay Leno. It will pit morse code vs text messaging (by the current US champions). Please watch, and if you enjoy the segment, please write, telegram, call or email the Tonight show and tell them you want to see more about this! It's a great chance for us to plug Morse, telegraphy and ham radio! Thanks. 73, Ken K6CTW ___ 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] K2 Control Board: C38 Question
Hello Zac, There are 4 blue capacitors labeled 681J COG100 but no 581 in the K2. 581 is not the correct capacitor for C38. 73, Johan - on4aeb ___ 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] CW vs Text Message Contest on NBC's TonightShowFriday -- watched it
They trounced them! No suprise but the text messengers seem suprised what 140 year old technology can do - Original Message - From: EricJ [EMAIL PROTECTED] To: 'Art - W6KY' [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Thursday, May 12, 2005 10:10 PM Subject: RE: [Elecraft] QST: CW vs Text Message Contest on NBC's TonightShowFriday The Guinness World's record for their stock sentence is 57.75 seconds. That works out to a leisurely 24 wpm. I don't see any contest here as long as Chip can send better than 24 wpm. snip ___ 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] Anyone tried fibermasts.
Tom : I am using a Dk9SQ mast in a semi-permanent installation at home. It is supporting a inverted-L W3EDP (end-fed 84ft wire) so there is a 50+ foot horizontal component of the wire coming away from the mast similar to what you are planning for the Battle Creek special. It has only been up about a month so I can't comment on how long you can expect the mast to last, exposed to the elements. I do suggest that if you plan to buy one and leave it up for a while that you should tape all of the joints with electrical tape after you extend it to prevent collapse. I have also looked at the MFJ version and it is a cheap imitation in my opinion. The DK9SQ masts are very well made and should provide many years of service. Michael VE3WMB P.S. I have had my DK9SQ mast for about 5 years and up until now I have used it mostly for portable operations while on vacation. P.P.S. I use a PVC tee with a hole drilled down through the middle to attach antenna wires near the top of the mast. With the hole through the Tee it will slide down over the mast a few feet. I have also used Tees in this manner as the center insulator of a dipole. ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
Paul wrote: and for reliable point to point communication, the instant messaging devices are way better in every way. My experience with employer-company-supplied-paid cell devices has been different. When I worked one of this U.S.'s largest technology tradeshows in Las Vegas, NV, and I'm standing in a line at a cab-stand, waiting to catch a ride back to my hotel, and I can't get enough signal (bars) to make a call, in a place like that, the last word I expect anyone to associate with any cell device is reliability. PLEASE. 73, Don - W7DAH ___ 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] K2 Control Board: C38 Question
Hallo Jos, Neen, er is geen probleem bij mij maar ik denk dat Zac Brown problemen heeft met de kleine codering op de condensatoren, hij kon de juiste waarde niet vinden voor C38. Ik ben nu aan mijn tweede K2 bezig, verleden jaar was het K2#3997 en nu is het K2#4889. Ik ga proberen om te contesten met S02R. De beste 73, Johan on4aeb ___ 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] DL1 20W Dummy Load
Bruce, Look in the DL1 instruction manual - there is a graph of power vs. output voltage properly compensated for the diode curve. The first page of the DL1 manual provides the formula of P=((Vx1.414) +0.15)^2/50 -- for those with sharp eyes, there is an extra right paren in th eequation in the manual. Simplifying the formula to V^2/25 will work at higher power levels where the diode drop becomes insignificant (about 2 watts and above). 73, Don W3FPR -Original Message- I was doing a calibration of a KAT2 I just built and had a significant error to adjust for Forward power (displayed power was ~30% of measured). When I looked closely at the DL1 I noticed the trace to the detector comes from the center of the 50 ohm load. That means the detected voltage is across 1/2 the load (25 ohms) and changes the power calc to V^2/25 = P vs. of V^2/50 = P. Can someone confirm this? Thanks... Bruce Bowman NM5B Sasnta Fe, NM -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.10 - Release Date: 5/13/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] DL1 20W Dummy Load
The correct formula which accounts for both the center tap detector and the diode drop appears in the DL1 manual. 73, Bob, N6CM - Original Message - From: Bruce Bowman [EMAIL PROTECTED] To: Elecraft Mail List elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 1:02 AM Subject: [Elecraft] DL1 20W Dummy Load I was doing a calibration of a KAT2 I just built and had a significant error to adjust for Forward power (displayed power was ~30% of measured). When I looked closely at the DL1 I noticed the trace to the detector comes from the center of the 50 ohm load. That means the detected voltage is across 1/2 the load (25 ohms) and changes the power calc to V^2/25 = P vs. of V^2/50 = P. Can someone confirm this? Thanks... Bruce Bowman NM5B Sasnta Fe, NM ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
On May 14, 2005, at 10:14 AM, Don - W7DAH wrote: Paul wrote: and for reliable point to point communication, the instant messaging devices are way better in every way. My experience with employer-company-supplied-paid cell devices has been different. When I worked one of this U.S.'s largest technology tradeshows in Las Vegas, NV, and I'm standing in a line at a cab-stand, waiting to catch a ride back to my hotel, and I can't get enough signal (bars) to make a call, in a place like that, the last word I expect anyone to associate with any cell device is reliability. PLEASE. OK, so did you pull out your KX1 and keyer and call him up? Because that's what we're talking about is the more reliable way to communicate, not whether you got any bars at a cab stand once. ___ 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] DL1 20W Dummy Load
Not quite, V^2/25 only accounts for the power in the bottom half of the dummy load. The top half dissipates an equal amount. The formula in the manual accounts for all of this. 73, Bob, N6CM - Original Message - From: W3FPR - Don Wilhelm [EMAIL PROTECTED] To: Bruce Bowman [EMAIL PROTECTED]; Elecraft Mail List elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 7:29 AM Subject: RE: [Elecraft] DL1 20W Dummy Load Bruce, Look in the DL1 instruction manual - there is a graph of power vs. output voltage properly compensated for the diode curve. The first page of the DL1 manual provides the formula of P=((Vx1.414) +0.15)^2/50 -- for those with sharp eyes, there is an extra right paren in th eequation in the manual. Simplifying the formula to V^2/25 will work at higher power levels where the diode drop becomes insignificant (about 2 watts and above). 73, Don W3FPR -Original Message- I was doing a calibration of a KAT2 I just built and had a significant error to adjust for Forward power (displayed power was ~30% of measured). When I looked closely at the DL1 I noticed the trace to the detector comes from the center of the 50 ohm load. That means the detected voltage is across 1/2 the load (25 ohms) and changes the power calc to V^2/25 = P vs. of V^2/50 = P. Can someone confirm this? Thanks... Bruce Bowman NM5B Sasnta Fe, NM -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.10 - Release Date: 5/13/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Fiberglass Mast Results
I have been using the 33 foot fiberglass mast from MFJ for 3 yrs now and no problems here at my QTH..It's mounted up on the roof and supports my quarter wave 40 mtr vertical made of wire. We have had winds of 70 mph and the mast was able to handle it quite well and it's self supporting (no guys) the top 8 foot does whip with the wind but no big deal. You also need to use electrical tape at each section, so it doesnt colapse during wind movement. Supporting a thin wire would be possible for an inverted L configuration but you need plenty slack in the horizontal length. Jack K8BVJ Tom : I am using a Dk9SQ mast in a semi-permanent installation at home. It is supporting a inverted-L W3EDP (end-fed 84ft wire) so there is a 50+ foot horizontal component of the wire coming away from the mast similar to what you are planning for the Battle Creek special. It has only been up about a month so I can't comment on how long you can expect the mast to last, exposed to the elements. I do suggest that if you plan to buy one and leave it up for a while that you should tape all of the joints with electrical tape after you extend it to prevent collapse. I have also looked at the MFJ version and it is a cheap imitation in my opinion. The DK9SQ masts are very well made and should provide many years of service ___ 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] T1 connection to FT-817
Hi All, Does anyone know, or know where I can locate, which pins that the T1 uses on the FT-817 interface? I want to make up a computer remote cable with a mini-DIN receptacle pigtail to plug in the T1 remote cable, and wiring ALL the pins is very hard for my shaky hands and tired eyes. I looked in the archives of both the Elecraft group and the FT-817 group, as well as the manuals. It seems that it uses the band-change voltage line, but does it use anything else, other than ground? 73, doug ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
Tim Jones wrote: I caught the segment you guys smoked em Great job of staying with the message even thru the crowd noise When you raised your hand that you were done the kids expression was amazing He could not believe you guys were already done Thanks for the great exposure about morse code Oh and the telegrapher outfits were great !! -Original Message- On Behalf Of Ken Miller, K6CTW It's a great chance for us to plug Morse, telegraphy and ham radio! Thanks. It *was* a great segment... But speaking from our experience working with publicity and media relations for the Pink Pistols ( http://www.pinkpistols.org ) over the last few years, I just think it's sad that the Leno people managed to almost completely bury the ham radio connection, although one of you (I missed which one) managed to punch up that point despite the overall spin of the segment. I wonder how many people watching even knew that radios were being used? I also think the costumes (and they *were* really cute) helped contriubute to the perception that Morse is something that's not done outside museums anymore. When you only have two or three minutes to work with it's hard to do everything you might want to. But a valiant effort nontheless! Congratulations es 73 de Maggie K3XS -- -/___. _)Margaret Stephanie Leber CCP, SCJP/The art of progress / /(, /| /| http://voicenet.com/~maggie SCWCD/ is to preserve order/ ---/ / | / | _ _ _` _ AOPA 925383/ amid change and to / --/ ) / |/ |_(_(_(_/_(_/__(__(/_ K3XS / preserve change amid/ -/ (_/ '.-/ .-/ARRL 39280 /order.-A.N.Whitehead/ /(_/_(_/___AMSAT 32844_/[EMAIL PROTECTED]/ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th
You guys did a great job! The costumes were great, especially since you were using keys that most people wouldn't recognize. The comments were FB publicity. It all made the center point: Ham radio and Morse code is still around and the most modern communications are not necessarily faster. It really did a great job of 'poking a hole' in the notion that higher tech is better tech G. And all of that in a few seconds as part of a simple little game Leno wanted to play. No, it's not likely to cause a rush to the hobby. That wasn't the opportunity or the point. Of course, if you had lost the contest you do realize that you'd have to take up collecting shells or basket weaving instead of Ham radio, don't you? Hi! 73, Ron AC7AC ___ 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] CW vs Text Message Contest on NBC's TonightShowFriday-- watched it
Usually I miss these 'events' but I sure saw and heard this one!...I still can't wipe the smile off my face!! - 73 Bruce. 72/73 - Bruce ve5rc/ve5qrp - QRP-C#1, QRP-L#886, A1 Operator ** Enter QRP-Canada's RUN with RAC contest - details at http://www.qrp-canada.com ** -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Mabbott Sent: Saturday, May 14, 2005 5:20 AM To: elecraft@mailman.qth.net Subject: [Elecraft] CW vs Text Message Contest on NBC's TonightShowFriday-- watched it They trounced them! No suprise but the text messengers seem suprised what 140 year old technology can do - Original Message - From: EricJ [EMAIL PROTECTED] To: 'Art - W6KY' [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Thursday, May 12, 2005 10:10 PM Subject: RE: [Elecraft] QST: CW vs Text Message Contest on NBC's TonightShowFriday The Guinness World's record for their stock sentence is 57.75 seconds. That works out to a leisurely 24 wpm. I don't see any contest here as long as Chip can send better than 24 wpm. snip -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.9 - Release Date: 5/12/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] CW vs Text Messenging on Leno: video clip
Here's the clip if you missed it: http://www.kkn.net/~n6tv/Text_vs_Morse_Leno_2005_05_13.wmv 73, Wayne N6KR --- http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
R: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th
Hellò list! Is that show available somewhere on the I'net? Would like to see it :-) 73 and congratulations to everybody involved! Joe, IW7ECJ (No-Code, but admired of coders nonetheless!) -Messaggio originale- Da: [EMAIL PROTECTED] [mailto:elecraft- [EMAIL PROTECTED] Per conto di Margaret Leber Inviato: sabato 14 maggio 2005 17.54 A: elecraft@mailman.qth.net Oggetto: Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th Tim Jones wrote: I caught the segment you guys smoked em ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
I remember the Walter Winchell newscasts when I was a kid. The experts from the broadcasting bunch say Winchell's code was a bunch of gibberish and he wasn't actually sending any code at all! Just something to get the listeners excited, like he was reading flashes from an active circuit! 73, Sandy W5TVW - Original Message - From: Bob - W5BIG [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 11:33 AM Subject: Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th | The costumes were a brilliant idea! Really added spice to the scene. | | Hearing the code on TV reminded me of Walter Winchell back in the 50's. | During his broadcast he would send code. It was fascinating. More info here: | http://chss.montclair.edu/~pererat/mww.htm | | I couldn't copy code then so I don't know if he was sending real text or | not, maybe someone can comment on that. | | 73/ Bob - W5BIG | | | | | ___ | 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] Morse on the Tonight Show, Tonight, Friday the 13th
Its available there: http://www.tarc.org/leno/leno.wmv 73, de VE2PID ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
Winchell didn't send code (or, at least if he did, it was in code). He had a bug next to his right hand, and he would, for dramatic effect, slap it around a bit. best wishes, dave belsley, w1euy On May 14, 2005, at 12:33 PM, Bob - W5BIG wrote: The costumes were a brilliant idea! Really added spice to the scene. Hearing the code on TV reminded me of Walter Winchell back in the 50's. During his broadcast he would send code. It was fascinating. More info here: http://chss.montclair.edu/~pererat/mww.htm I couldn't copy code then so I don't know if he was sending real text or not, maybe someone can comment on that. 73/ Bob - W5BIG ___ 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] Tonight Show
BRILLANT I particularly liked the sender blowing the smoke off his fingers. Thanks for a real hoot. Tom, W3QS ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
I did a little arithmetic to determine the skills necessary for this 'competition'. It appears the text only folks never stood a chance. Using the standard word PARIS here is the run down. PARIS * 20 wpm = 100 chars/minute 100 chars/60 seconds = 1.67 chars/second At 27 wpm = 2.25 chars/sec At 30 wpm = 2.5 chars/sec. Having never used text messaging, since cell phones do not work where I live, I cannot truly measure the dexterity required to pass this bit of traffic. Since I am a touch typist at a moderate rate of 60 wpm I know I could beat most CW ops if given the chance to type the message on a QWERTY keyboard and send it via one of the digital modes. But on a little cellphone's keypad I do believe I would be severely hampered by its user interface. They are pretty much a two finger input device as far as I can tell. My dad was pretty good at two finger typing (40 wpm) but that method has its inherent difficulties. I don't think this was a valid test of different user interfaces but it makes for a fine joke. Now if those folks using the cellphones would have had Wayne's two button (dot/dash) user input device they would have been on the same footing. But even then there would have been the use of repeaters and landline circuits to transfer their message. This would have slowed the information exchange by just enough to get themselves smoked by the simplex transfer of data by the '817 to '817 connection. The contest would have been more fair however. Imagine if our very own Chicken Fat Operator N0SS had been the keying op? The poor cell op would truly have had egg on his face ;) Long live CW!! 73, Kevin. KD5ONS Should truly be called the Vail Code but I digress. KJR -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.8 - Release Date: 5/10/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Tonight Show
The sender was Chip Margelli K7JA. He works for Yaesu. As I remember he is head of their service Department. Another reflector mentioned who the other fellow was. I don't remember his call. Apparently the props director for the show is also a ham. It was fun to concentrate on the sending and copy exactly what Chip was sending. Being from the NW, it was also fun to watch the fish throwing! It's better to watch them throw them at the Pike St. Market in person though.. 73 Jim W7RY 11:20 AM 5/14/2005, Tom Skinner wrote: BRILLANT I particularly liked the sender blowing the smoke off his fingers. Thanks for a real hoot. Tom, W3QS ___ 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] Tuner efficiency question
In a message dated 5/13/05 12:51:01 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: Many QRP operators assume that a tuner used for QRP can be small because one doesn't need the power-handling capability of a larger tuner. However, if a tuner has x db loss, then that loss will reduce the strength of a received signal by x db whether the signal is transmitted at 5 or 500 watts! That's true but it doesn't mean good tuners must be big. The lossiest element in most tuners is the inductor. If an inductor has high Q, then by definition it has low loss. Power-handling capability is a related but different thing.It involves the ability to withstand high voltage if necessary, and to dissipate a certain amount of power. A high Q coil doesn't necessarily have a high power handling capacity, and vice versa. 73 de Jim, N2EY ___ 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] A Morse PDA/communicator and other uses for Morse code [was: T...
In a message dated 5/13/05 2:48:43 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: driving my co-workers nuts with an Outlook hack I wrote that would play the sender and subject of each incoming message out my speaker in cw :). Years earlier, I'd written a plugin for TinyFugue that would send what each person said in the chat room out in cw, with different pitch, speed, weight, and swing assigned to each of the regulars :). That is just too cool. Here's what I'm looking for: I have a Motorola V180GSM cell phone. It has the ability to associate different rings to different incoming callers (if they're in the 'phone's memory). And you can write your own ringtones. I'd like to find instructions on how to input Morse code ringtones on this specific phone. 73 de Jim, N2EY ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
I posted the math here based on the Guinness sentence that the text messenger had to send for his world record, but I'm too lazy to look for it now. The official text is 160 characters INCLUDING spaces, 136 without. But SMS requires that spaces be keyed in where Morse does not. So SMS is at a throughput disadvantage from the beginning. Ben Cook set the text messenger record with 160 characters in 57.75 seconds. That works out to 29 wpm (5.5 wpm) for 160 characters or about 24 wpm without. Actually quite unbelievably fast for anyone who has entered an address or note on their cell phone. So to beat him, it only required sending Morse at 24 wpm. My guess is Chip was sending at better than 25, but less than 30 wpm. It doesn't so much speak to the efficiency of Morse as it speaks to the unbearably pathetic human interface that is SMS. However, it takes less than 5 minutes to learn SMS, and probably that many days or even weeks to reach a comparable speed in Morse. AND, the receiver already has the skills necessary to read SMS where Morse requires a trained operator at both ends. Not to apologize for Ben Cook, but he probably practiced the Guinness script every waking moment before his record attempt. He was seeing the Tonight Show text for the first time. So what do we have? I'd say 3:06 minutes of light television entertainment. That's good enough. Eric KE6US -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Kevin Rock Sent: Saturday, May 14, 2005 11:27 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th I did a little arithmetic to determine the skills necessary for this 'competition'. It appears the text only folks never stood a chance. Using the standard word PARIS here is the run down. PARIS * 20 wpm = 100 chars/minute 100 chars/60 seconds = 1.67 chars/second At 27 wpm = 2.25 chars/sec At 30 wpm = 2.5 chars/sec. Having never used text messaging, since cell phones do not work where I live, I cannot truly measure the dexterity required to pass this bit of traffic. Since I am a touch typist at a moderate rate of 60 wpm I know I could beat most CW ops if given the chance to type the message on a QWERTY keyboard and send it via one of the digital modes. But on a little cellphone's keypad I do believe I would be severely hampered by its user interface. They are pretty much a two finger input device as far as I can tell. My dad was pretty good at two finger typing (40 wpm) but that method has its inherent difficulties. I don't think this was a valid test of different user interfaces but it makes for a fine joke. Now if those folks using the cellphones would have had Wayne's two button (dot/dash) user input device they would have been on the same footing. But even then there would have been the use of repeaters and landline circuits to transfer their message. This would have slowed the information exchange by just enough to get themselves smoked by the simplex transfer of data by the '817 to '817 connection. The contest would have been more fair however. Imagine if our very own Chicken Fat Operator N0SS had been the keying op? The poor cell op would truly have had egg on his face ;) Long live CW!! 73, Kevin. KD5ONS Should truly be called the Vail Code but I digress. KJR -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.8 - Release Date: 5/10/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] question on part
The male connector for the dc supply on the back of the K2 mates with the dc power jack. In the manual it states this is a 2.1mm male connector. What are the inside and outer dimensions? john ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
Its unfortunate they had to be costumed up as 140 year old telegraphers. It may have been cute however it doesn't do our image much good. Some would say that any publicity is good publicity but I'm not so sure in this case. But hey, more importantly, we're those FT-817's by any chance? Likely just coincidence no doubt. Fortunately, at that distance you wouldn't require a PA. Gregg, VE4NU --- ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 2490 DSP Pop
Hi I have a K2, serial number 2490 fitted with the KDSP2 board, DSP firmware version 3.18, microcontroller version 3.10. The DSP appears to be working ok. If I disable the DSP via the display button (DSP = BYP) the audio is muted for a short period of time and then audio returns as would be expected. However if I turn the DSP back on I get a loud crackle from the speaker. The crackle appears when the volume is turned fully down. Increasing the volume increases the loudness of the crackle. From the KDSP2 manual I assume the speaker output should be muted when the DSP board is turned on or off but my K2 seems to only mute the speaker when the DSP is turned off. Any ideas what could be causing this? Thanks Andy ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
It requires time, but it doesn't require sending an additional character. The SMS guy had to physically click a space key like any other character. The Morse guy didn't. -Original Message- From: David A. Belsley [mailto:[EMAIL PROTECTED] Sent: Saturday, May 14, 2005 1:34 PM To: EricJ Cc: 'Kevin Rock'; Elecraft Reflector Subject: Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th I posted the math here based on the Guinness sentence that the text messenger had to send for his world record, but I'm too lazy to look for it now. The official text is 160 characters INCLUDING spaces, 136 without. But SMS requires that spaces be keyed in where Morse does not. So SMS is at a throughput disadvantage from the beginning. A space requires time in code, too. ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
You guys are missing something in the timing. Sending an SMS message requires far more than just keying in the receiver's phone number and the text itself. Once all this is keyed in and the send button is pressed, the cell system takes over. Much like the email system we are now using, the SMS message is forwarded into the SMS gateway, which is most likely located at some central point in the cellphone company's system. There are amazingly few of these due to the vast amount of bandwidth inside the phone companies. The next time the system services outgoing messages, the server will start checking for delivery parameters, such as if the receiving phone is available and ready to accept a message. When all these gates have been cleared, the message is forwarded to the receiver. Only then does the message come up for display. This can happen quickly (hundreds of milliseconds), or rather slowly (minutes or more) depending on the loading of the SMS system and the overall cell system. Jack, what you say is true. However, you're missing the fact that the kid was still in the process of keying in his sentence when the code guys had finished. It would be interesting to know just how far he had gotten, but it is clear it was not to the end. best wishes, dave belsley, w1euy ___ 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] Organic Rosin Core Solder
Folks; It would seem to me to not be from rosin or resin core solder; if it is corrosion, it sounds more like acid core solder; perhaps it was mislabeled. The term organic unfortunately is frequently misused; all hydrocarbons are organic right? Water soluble? I assume the flux, as in wash after soldering? Flux is typically to form a layer that on the surface that inhibits the immediate corrosion (due to the higher temperature of the melted solder) and help it wick to the untinned surface you are trying to solder to I think. 73 de W5SV, Dave Jim W7RY wrote: I would think you could use a good solder sucker and suck all the bad solder off the board. Then re-do all joints with the correct solder. Are you sure it's really corrosion? Seems odd that the solder would corrode. Solder is for soldering brass, silver, copper, tin and etc... Why would it corrode the elements that it's designed to work with? What is the stated purpose for water soluble flux in led/tin solder? ___ 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] Organic Rosin Core Solder
First of all, you are correct, it is corrosion. I have used plenty of Kester Organic Core Solder, Flux 331. I still use it a lot. The rules I follow are: 1) note the time the first solder joint is made. 2) not more than 1 hour later I take the work in progress to the sink and run lots of hot water over it. Sometimes I use an old toothbrush to be sure things are scrubbed clean. My friend who builds spacecraft flight boards uses a 30-minute timer rather than 1 hour. 3) I then dry the board and continue building, restarting the clock at step (1) with the next solder connection. *** I have had some luck cleaning up neglected, starting-to-corrode solder joints by resoldering them with yet more flux and then thoroughly rinsing with hot (tap) water. Alcohol doesn't work with this stuff, you need warm-to-hot water. This may not work, but the grainy gray-green corrosion will only get worse with time, so the additional risk is slight. /* lawyer speak on Naturally, the risk is yours and I am not advocating anything here! This is not advice. It is only an indication of what I might do, not what you should do. /*lawyer speak off A final point: never use this type of flux when soldering stranded wire. It will wick up into the wire, you cannot clean it, and the wire joint will corrode and fail. Probably on Field Day... Enjoy! Lyle KK7P PS - this is *not* an endorsement or even a suggestion to use water soluble flux!!! LJ ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
In a message dated 5/14/05 4:46:26 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: Sending an SMS message requires far more than just keying in the receiver's phone number and the text itself. Once all this is keyed in and the send button is pressed, the cell system takes over. Right - but the text messagers weren't done entering the message before the Morse ops were done. The delay in the SMS system was immaterial - they never got to the point of sending, at least from what I saw. Besides, the challenge was simply which mode was faster. That was clearly demonstrated. Oddly enough, I've encountered many a cell phone that announces an incoming text message by sending SMS - in Morse! 73 de Jim, N2EY ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
In a message dated 5/14/05 4:05:35 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: The official text is 160 characters INCLUDING spaces, 136 without. But SMS requires that spaces be keyed in where Morse does not. So SMS is at a throughput disadvantage from the beginning. No it isn't. Morse requires spaces between letters and words, and the spaces are longer than some letters! In the Australian test, btw, the text messagers used abbreviations and the Morse ops used the straight text, yet Morse still won. Don't know if the Leno test allowed text abbreviations - the Morse ops sent the straight text. 73 de Jim, N2EY looking for my green eyeshade. ___ 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] Morse on the Tonight Show, Tonight, Friday the 13th
In a message dated 5/14/05 4:33:07 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: Its unfortunate they had to be costumed up as 140 year old telegraphers. I think it was a great idea! It may have been cute however it doesn't do our image much good. Sure it does - it shows we have a sense of humor. Plus, TV is visual, and the costumes made it clear to the audience who was who. It should also be remembered that the text message sender was the *world champion*, not someone selected at random. Some would say that any publicity is good publicity but I'm not so sure in this case. I think they did a great job and the costumes were a nice touch. 73 de Jim, N2EY ___ 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] Organic Rosin Core Solder
John: Sorry to hear of your problem when your project went along so well. Gary recommended to me to use Acetone to clean off solder resin. You might try that to see if it cuts the apparent tarnish. Sounds like you might have to redo every solder joint on the RF board after removing as much of the offending solder as possible. 73, Charlie, W0YG.. ___ 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] Organic Rosin Core Solder
You piqued my curiosity John. Since I'm still using spools of Kester solder that I bought many, many years ago I haven't kept current with the latest stuff. Looking at their web site (www.kester.com) I see they have a non-rosin organic flux that apparently is designed for electronics (so it won't be acid!). I can see why they'd feature it being water-soluble if it isn't rosin. However, that stuff should not cause corrosion! They have a variety of electronic solder products, some rosin core and some not. And, of course, they make non-electronic solders that probably do have acid flux. I'd suggest contacting their Hq by phone or e-mail. They have contact info on the web site, and give them the spool info you have and ask them what's going on. I agree with Don's suggestions. If you approach it nicely but firmly that quite obviously something is very wrong with that solder and they discover it is a mis-marked roll or some other fault of theirs, you might get a new K2 out of them in the bargain. At the very least you can get some good info about how to stabilize it. Ron AC7AC -Original Message- From: John Bonk [mailto:[EMAIL PROTECTED] Sent: Saturday, May 14, 2005 2:42 PM To: 'Ron D'Eau Claire'; Elecraft@mailman.qth.net Subject: RE: [Elecraft] Organic Rosin Core Solder Ron, I'll try to find the page I reference, but it definitely said water-soluble. I can see the residue on the board, and the DMM shows a path across the gunk. The corrosion seems to be returning also; only 16 hours after the last brushing. John ___ 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] K2 2490 DSP Pop
Problem Solved, a small short/blob of solder on the female connector on the DSP PCB was causing the issue. Andy. - Original Message - From: Andy 0zdly7602-at-sneakemail.com |Elecraft Reflector| ... To: elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 10:58 PM Subject: [Elecraft] K2 2490 DSP Pop Hi I have a K2, serial number 2490 fitted with the KDSP2 board, DSP firmware version 3.18, microcontroller version 3.10. The DSP appears to be working ok. If I disable the DSP via the display button (DSP = BYP) the audio is muted for a short period of time and then audio returns as would be expected. However if I turn the DSP back on I get a loud crackle from the speaker. The crackle appears when the volume is turned fully down. Increasing the volume increases the loudness of the crackle. From the KDSP2 manual I assume the speaker output should be muted when the DSP board is turned on or off but my K2 seems to only mute the speaker when the DSP is turned off. Any ideas what could be causing this? Thanks Andy ___ 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] Organic Rosin Core Solder
Lyle, I ask this in all seriousness; and with no disrespect. But am I missing something here? Why would folks use this stuff if it's such a pain in the butt? 73 de Larry W2LJ ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Simple Method for Measuring Tuner loss with reactive loads
Fellow Chasers of the lost RF, There has been much discussion on the reflector about tuner losses but most seems to be theory and conjecture. It would be good to see some typical figures for tuners (into random antennas). How do Elecraft, Z-match, balanced tuners, Johnson matchbox and tuners with output baluns compare when working into complex loads? The following is an easy way to find out. Simple Method for Measuring Antenna tuner loss with reactive loads I haven't tried this method but it should work. It is easy to measure the efficiency of a tuner with resistive loads. The problem is with complex reactive loads, as it is not possible to measure the output with simple instrumentation. The following is a very simple procedure but does require the use of 2 other tuners capable of matching similar loads. Let us assume that we want to know the loss of antenna tuner A when it is matched to an unknown antenna load. In the following, all measurements are made with pure resistive 50 ohm loads so a simple power meter can be used. 1. Tune tuner A for lowest SWR with antenna (note settings) 2. Connect output of tuner A to output of tuner B 3. Connect input of tuner B to 50 ohm dummy load 4. Tune tuner B for lowest SWR 5. Measure power loss through tuner A + tuner B. (XdB) 6. Repeat steps 2, 3, 4 and 5 replacing B with tuner C.. (YdB) 7. Repeat steps 2, 3, 4 and 5 using tuner B and C... (ZdB) A little simple algebra: Tuner A + tuner B = XdB Tuner A + tuner C = YdB Tuner B + tuner C = ZdB Add the first 2 lines 2A + B + C = X + Y Substitute Z for B + C 2A = X + Y - Z Loss of tuner A = (X + Y - Z)/2dB Notes: The exercise is much simpler when you have 2 identical tuners. All you have to do is half the loss measured through the 2 tuners. The same power meter should be used for power input and for power output as meter calibrations are not accurate enough. A more accurate way is to measure the RF voltage across the tuner input and across the dummy load, to find the power loss. This could be an interesting club meeting project to compare a wide variety of tuners. 73 and enjoy Tony Fegan VE3QF K2 # 490 ___ 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] question on part
John: From a couple years ago. 73, Tom N0SS Date: Fri, 21 Sep 2001 10:19:20 -0500 To: [EMAIL PROTECTED] From: Tom Hammond NØSS [EMAIL PROTECTED] Subject: [Elecraft] K2 Coaxial Power Connector - More info Rod Cerkoney, N0RC, wrote: The plug is 5.0/2.1mm OD/ID respectively. RS has them, but I don't have the P/N. In store packages have size marked on them. The part Elecraft supplies is from Switchcraft and is available from Digikey part number: SC-1052-ND (I think the Switchcraft item is of superior quality). The Connector in the radio (probably Switchcraft) is Digikey item: SC1155-ND Digikey online page for these items is: http://info.digikey.com/T013/V5/177.pdf More info: Switchcraft #S760, Mouser part #502-S-760 Technical specs: ID .080 (2.03mm), assume 2.1mm OD .218 (5.5mm) See NOTE below Barrel Length .375 (9.52mm) Note: Switchcraft does not list a 5.1mm (0.20) diameter barrel coaxial power connector. It appears that ALL of their coaxial pwr connectors are 5.5mm (0.218) in diameter. I used a caliper to confirm the outside diameter of the barrel of the plug I'd received from Elecraft. 0.218 (5.5mm) on the button. For more info on this Switchcraft connector, go to: http://www.switchcraft.com/ and search for S760. The plug dimension specs are at the bottom of this page, and if you click on selection #2 (760/S760) from the list at the top of the page, you can download a single-page PDF which shows to detailed engineering drawing of the plug, with references which will match to the specs on the page noted above. I believe this to be the power plug which we are using on our K2s and K1s. They ARE better quality than the plugs available from R/S, if for no other reason that the fact that the center cunductor of the Switchcraft plugs is slightly recessed within the insulator, thus making it more difficult to accidently short the positive lead to ground. The apparent R/S equivalent (at least with regard to dimensions, NOT quality) is their 274-1569 (5.5 x 2.1 mm). The apparent DigiKey part #'s are: Plug SC-1052-ND (as Ron has stated) Socket SC-1153-ND (the SC-1155-ND is SMT) NOTE that the 1998 DigiKey catalog from which I got this info had the Switchcraft part #'s for the plug and jack SWITCHED. However the DigiKey web site (www.digikey.com) had everything listed correctly. Users are urged to RETAIN this information for the future when you will surely need it. And WILL eventually need it... almost guaranteed! Thanks Ron, Tom Hammond N0SS --- Submissions: [EMAIL PROTECTED] (You must be subscribed to post) Postings must be sent from the exact same addr. as subcribed. Please note: The list server automatically rejects HTML encoded emails. List Archive page: http://www.qth.net/archive/elecraft/elecraft.html 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] Organic Rosin Core Solder
Lyle: As a matter of interest, what are the possible advantages of such a solder that would warrant such special, unusual, and awkward attention? thanks, dave, w1euy On May 14, 2005, at 6:26 PM, Lyle Johnson wrote: First of all, you are correct, it is corrosion. I have used plenty of Kester Organic Core Solder, Flux 331. I still use it a lot. The rules I follow are: 1) note the time the first solder joint is made. 2) not more than 1 hour later I take the work in progress to the sink and run lots of hot water over it. Sometimes I use an old toothbrush to be sure things are scrubbed clean. My friend who builds spacecraft flight boards uses a 30-minute timer rather than 1 hour. 3) I then dry the board and continue building, restarting the clock at step (1) with the next solder connection. *** I have had some luck cleaning up neglected, starting-to-corrode solder joints by resoldering them with yet more flux and then thoroughly rinsing with hot (tap) water. Alcohol doesn't work with this stuff, you need warm-to-hot water. This may not work, but the grainy gray-green corrosion will only get worse with time, so the additional risk is slight. /* lawyer speak on Naturally, the risk is yours and I am not advocating anything here! This is not advice. It is only an indication of what I might do, not what you should do. /*lawyer speak off A final point: never use this type of flux when soldering stranded wire. It will wick up into the wire, you cannot clean it, and the wire joint will corrode and fail. Probably on Field Day... Enjoy! Lyle KK7P PS - this is *not* an endorsement or even a suggestion to use water soluble flux!!! LJ ___ 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] Organic Rosin Core Solder
Larry Makoski W2LJ wrote: I ask this in all seriousness; and with no disrespect. But am I missing something here? Why would folks use this stuff if it's such a pain in the butt? I believe that it's normally used with automated soldering equipment, and the boards are washed in a hot water bath after soldering. I presume (I'm sure Lyle or someone knows for sure) that the advantage is that the flux can be removed without using environmentally dangerous solvents. -- 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
Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th
On Sat, May 14, 2005 at 06:32:33PM -0400, [EMAIL PROTECTED] wrote: It should also be remembered that the text message sender was the *world champion*, not someone selected at random. To my mind, this point bears repeating and emphasis. With underline, in bold, parentheses, and a large font. Ken, please understand I'm not saying this to diminish your skill, Chip's skill, or your accomplishment. But they pitted the *world champion* SMS people against two mid-speed code operators--not two ops at the top of their art, but fairly typical morse ops working at a speed that isn't especially noteworthy in our community. While Ken and Chip are both undoubtedly fantastic ops and obviously skilled in their art, they aren't especially unusual, and this bears emphasis. The best of the best still got beat out by good, though not atypical. Vy 73! -- Buddy Brannan, KB5ELV : Co-Mod. of http://www.assist.com/Pennsylvania - Protect Your Family From Disease: glyconutrients help your body repair, defend, and correct itself. MIT says this discovery will change the world: http://www.theoptimalhealthsolution.com - High tech meets high touch: What happens when a 135+-year-old company, modern technology, and a dynamic team come together? See for yourself in this free Ebook: http://www.tastybiz.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] Organic Rosin Core Solder
Hi This sounds like water soluble flux. This stuff needs to be cleaned off as soon as possible or it will cause corrosion. Normally is is cleaned in distilled water in a special washing machine. I would suggest placing your circuit boards in the dishwasher and run it through the normal cycle. Alcohol, acetone or other petroleum based cleaners will not work on this flux it is designed to be cleaned with water. This stuff is difficult to use without the proper techniques. Use the recommended rosin core flux and cleaning is a non issue. Don Brown KD5NDB - Original Message - From: W0YG, Charlie Summers [EMAIL PROTECTED] To: Elecraft Reflector elecraft@mailman.qth.net Sent: Saturday, May 14, 2005 5:38 PM Subject: Re: [Elecraft] Organic Rosin Core Solder John: Sorry to hear of your problem when your project went along so well. Gary recommended to me to use Acetone to clean off solder resin. You might try that to see if it cuts the apparent tarnish. Sounds like you might have to redo every solder joint on the RF board after removing as much of the offending solder as possible. 73, Charlie, W0YG.. ___ 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] Organic Rosin Core Solder
I ask this in all seriousness; and with no disrespect. But am I missing something here? Why would folks use this stuff if it's such a pain in the butt? I believe that it's normally used with automated soldering equipment, and the boards are washed in a hot water bath after soldering. I presume (I'm sure Lyle or someone knows for sure) that the advantage is that the flux can be removed without using environmentally dangerous solvents. That's correct. Water is an environmentally friendly solvent (at least for now :-) It does an excellent job of cleaning the surfaces to be soldered. It cleans well (as long as you do it quickly!), so joints can be inspected. It is (or was) not considered hazardous. It acts like soap - you get suds as you wash/scrub the board. It is not recommended for kit building because of the dangers of corrosion. In automated work,the boards are exposed to the flux, then a wave of molten solder, over a period of some few to tens of seconds. It is then rinsed thoroughly. The organic cored solder was probably intended mostly for touch-up and rework. 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
[Elecraft] See Y'all at Dayton - My First Time!
Planning to mix business pleasure attend Dayton for the first time. See y'all at the Elecraft booth. 73, Lynn, K5AVJ K2 #1411 ___ 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] Elecraft CW Net Announcement
Howdy Folks, Another very hectic week at our house. I flew to Wisconsin and had a negative experiment in the art of QRP from a 5th floor hotel room. Heard 0, 9, 8, and 2 land ops but could not get anyone to hear my mighty 5 watt signal. Not via CQ nor tail ending. That was on 20, 30, 40 and 80 meters. Heard many, many operators and an automatic station (W1AW) but no one heard me. Never fear I shall return, I will never surrender, but try, try again. Eventually I will prevail. Looks like sunspots are back in vogue so hopefully that CME will not rock the ionosphere too badly before tomorrow evening. All y'all are welcome to test your rig, your copy skills, and the conditions tomorrow night. You can even use text messaging if you like. But cell phones do not work up on this mountain. However, they are a good test of reception and the art of QRPp with a compromise antenna. Please join us: Sunday 2300z (Sunday 4pm PDT) 14050 kHz Monday 0200z (Sunday 7pm PDT) 7045 kHz Visit our web site: http://ecn.visionseer.com/ for net details. Thank you Dan. See you tomorrow night, Kevin. KD5ONS -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.10 - Release Date: 5/13/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Morse on the Tonight Show, Tonight, Friday the 13th
Hi Buddy: I suspect you don't know K7JA, who has, for the past 30+ years, been one of the WORLD'S TOP CW CONTEST OPS! Chip can run 'em at 40-45 WPM just as easily as he can run 'em at 25 WPM. And, I'll bet, that if Ken's been Chip's contesting 'partner', he's no slouch either. It' s just that they were sending at a speed reasonable enough to fully ensure 100 percent copy regardless of the amount of background QRM. 73, Tom Hammond N0SS At 06:33 PM 5/14/05, Buddy Brannan wrote: On Sat, May 14, 2005 at 06:32:33PM -0400, [EMAIL PROTECTED] wrote: It should also be remembered that the text message sender was the *world champion*, not someone selected at random. To my mind, this point bears repeating and emphasis. With underline, in bold, parentheses, and a large font. Ken, please understand I'm not saying this to diminish your skill, Chip's skill, or your accomplishment. But they pitted the *world champion* SMS people against two mid-speed code operators--not two ops at the top of their art, but fairly typical morse ops working at a speed that isn't especially noteworthy in our community. While Ken and Chip are both undoubtedly fantastic ops and obviously skilled in their art, they aren't especially unusual, and this bears emphasis. The best of the best still got beat out by good, though not atypical. Vy 73! -- Buddy Brannan, KB5ELV : Co-Mod. of http://www.assist.com/Pennsylvania - Protect Your Family From Disease: glyconutrients help your body repair, defend, and correct itself. MIT says this discovery will change the world: http://www.theoptimalhealthsolution.com - High tech meets high touch: What happens when a 135+-year-old company, modern technology, and a dynamic team come together? See for yourself in this free Ebook: http://www.tastybiz.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] Morse on the Tonight Show, Tonight, Friday the 13th
Tom N0SS wrote: Hi Buddy: I suspect you don't know K7JA, who has, for the past 30+ years, been one of the WORLD'S TOP CW CONTEST OPS! Chip can run 'em at 40-45 WPM just as easily as he can run 'em at 25 WPM. And, I'll bet, that if Ken's been Chip's contesting 'partner', he's no slouch either. It' s just that they were sending at a speed reasonable enough to fully ensure 100 percent copy regardless of the amount of background QRM. \ That explains a lot, but it doesn't alter the fact that they were not sending at anything most operators would consider QRQ. I was impressed that Ken could copy through the racket. I could, but then I wasn't there with all the echoes and distractions, not to mention having my reputation on the line to win the contest G That would have qualify as at least as stressful as any FCC code exam I sat through, Amateur or commercial! Ron AC7AC ___ 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] Continental Code Wins on TV!
Tnx, Ken! I am IMPRESSED at your copy at 30 wpm with a stick. I had to practice a LOT to do that at 20/25 wpm for my Commercial license. They required block printing, though. Still, FB going! It IS a Hobby. Thanks for showing so many people how much fun it can be. Now, is Elecraft or Yaesu going to offer green eyeshades and sleeve bands as accessory items for the well-dressed operators of the 21st Century? 73, Ron AC7AC ___ 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] Fiberglass Mast Results
Another option is the fiberglass telescoping section from the guys who make the SteppIR verticals. VERY reasonably priced and they work great. I think they list them in their parts section on their website. 73 Greg AB7R -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Saturday, May 14, 2005 8:36 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Fiberglass Mast Results I have been using the 33 foot fiberglass mast from MFJ for 3 yrs now and no problems here at my QTH..It's mounted up on the roof and supports my quarter wave 40 mtr vertical made of wire. We have had winds of 70 mph and the mast was able to handle it quite well and it's self supporting (no guys) the top 8 foot does whip with the wind but no big deal. You also need to use electrical tape at each section, so it doesnt colapse during wind movement. Supporting a thin wire would be possible for an inverted L configuration but you need plenty slack in the horizontal length. Jack K8BVJ Tom : I am using a Dk9SQ mast in a semi-permanent installation at home. It is supporting a inverted-L W3EDP (end-fed 84ft wire) so there is a 50+ foot horizontal component of the wire coming away from the mast similar to what you are planning for the Battle Creek special. It has only been up about a month so I can't comment on how long you can expect the mast to last, exposed to the elements. I do suggest that if you plan to buy one and leave it up for a while that you should tape all of the joints with electrical tape after you extend it to prevent collapse. I have also looked at the MFJ version and it is a cheap imitation in my opinion. The DK9SQ masts are very well made and should provide many years of service ___ 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] Organic Rosin Core Solder
Hi, the following are some thoughts that may explain and perhaps help. Looks like what is being referred to is water soluble flux. It's primary use is in the mass production of PC boards on commercial wave soldering machines. Discrete components are first either manually place/inserted or pick and placed by computer controlled equipment. Next the boards are placed on a conveyor type arrangement that passes the board over a rolling (wave) bath of water soluble flux. This coats the entire bottom of the board. Next the board passes over a rolling (wave) of molten solder which actually solders the entire board in a few seconds. As the boards are passed thru the system a giant heating system immediate above the board preheats it to facilitate solder flow. After the board cools for a few short minutes it goes into the equivalent of a commercial dish washer that washes the water soluable flux from the board. Those boards being used for critical applications frequently get two washings. Hand soldered boards are usually put thru an elaborate degreaser process. Yes, water soluble flux will cause numerous conduction paths throughout the board and some corrosion as mentioned. (I can tell you a horror story about improperly washed boards in critical medical equipment.) High ambient atmospheric moisture can cause recurrence of conduction mixed with a slight elevation in ambient heating greatly exacerbates the problem. Simply desoldering and resoldering each component will not correct the problem. The flux must be completely removed. Proceed at your own risk, but as suggested earlier thorough washing with warm water with lots of scrubbing would be my thought. I'm note sure how water resistant all the components on the Elecraft boards are. Most resistors, dipped capacitors and IC's should be okay. But, again not guarantee. A major part of choosing components for commercial PC boards that are to be wave soldered is considering their reaction to wave soldering including repeated washing. Perhaps this has been a bit of help. Good Luck Jim, AB0UK K2 SN 4787 __ Yahoo! Mail Mobile Take Yahoo! Mail with you! Check email on your mobile phone. http://mobile.yahoo.com/learn/mail ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] K2 #4913 almost there! Help!
I have K2 #4913 with SSB option installed. I know - I should have waited on installing the SSB board until I finished the kit but page 28 said to install them if I had them, so I did. I went ahead at that point and finished the SSB board seperatley because I had opened it's bag. I then finished the control and front panel boards and moved on to the RF board. I followed the manual and got to the test point. Upon powering up, I got INFO 201, followed a few secs later by Elecraft then INFO 080. I figured I got that because I had only installed the SSB components on the front panel board, not on the RF board. I decided to continue assembly in the hope that installing the reciever circuits (and the SSB board) would fix the problem. Nope! Same error. I guessed I needed the rest of the rf board so I finished the K2. I powered up - INFO 080 stared at me. Did a master reset with no improvement. I'm not hearing anything on 4 mhz. Even after a reset, I hear NO relays clicking. RF board's U1 shows normal voltage except for pins 9 (-0.01v) and 10 (-0.02v) - they should be +0.2 +0.15v, respectivley. Pin 18 is dead. Pin 28 Shows 5.53V (normal). I've done all that I should - checked my work as I worked 4-5 times along the way. Resistance checks were all in range. Is this just U1 being dead? I haven't completed final assembly - is there something there that I could install to fix this? Help! Just my 2¢ worth... 73's es gd dx de Ken KGØWX Grid EM17ip, Flying Pigs #1055, Digital On Six #350, Proud builder owner of Elecraft K2 #4913 -- Warning - the author of the above message has been bitten by both the QRP and Elecraft bugs! Don't worry - in outgoing mail scanned by AVG Checked by AVG Anti-Virus. Version: 7.0.308 / Virus Database: 266.11.10 - Release Date: 5/13/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
