[Elecraft] Noise-reducing cans
Hi, all concerned: I have tinnitus and some hearing loss at age 61, and have found the PlaneQuiet NC-5 cans helpful in the shack and in the mfg shop where I'm a tech. They're light, and they reduce the racket from HVAC, refrigerators, freezers, amp blowers, computer blowers, and so on. http:www.thetravelinsider.info/roadwarriorcontent'planequietnc6headphones.htm Some plans fell through, and I have 4 NC-5 sets which were new last month, in original boxes, with instructions, warranty cards, carrying pouch, and AA cell. These are the ones over which Bose apparently threatened legal action over patent infringements of some sort. The supplier gets $75 a set singly; if you're interested at $60 a set shipped domestically, pls email me, [EMAIL PROTECTED] off-reflector. TIA, HNY and 73, Dave, N3HE ___ 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 Problem
Whats a KAP100? Sorry about the typo. I just put up an 1/2 wave antenna for 160 meters that is 260 feet long and center fed with 450 ladder line. When RXing on all bands and moving the PWR contorl to 11 watts or more so the relay in the PA switches over to high, I get erratic noise in the receiver. If I back the PWR down to QRP, then RX is OK again. I am almost sure that this noise is rectified AM signals within the TR switch. Not sure if this can be expected with this switching method or if I have a component that's bad. Most of my antennas are Loops or match and fed with coax, and don't display this condition. Several years ago I had a Ten Tec transceiver the experinced the sam problem, I resolved by building a high pass fillter and installing it in the receive line and the problem went away. Not sure there is room for this in the K2. Any ideas? Kurt K0ARO ___ 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] Noise-reducing cans
The link is password protected. Bill -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David J Windisch Sent: Monday, January 03, 2005 7:34 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] Noise-reducing cans Hi, all concerned: I have tinnitus and some hearing loss at age 61, and have found the PlaneQuiet NC-5 cans helpful in the shack and in the mfg shop where I'm a tech. They're light, and they reduce the racket from HVAC, refrigerators, freezers, amp blowers, computer blowers, and so on. http:www.thetravelinsider.info/roadwarriorcontent'planequietnc6headphones.ht m Some plans fell through, and I have 4 NC-5 sets which were new last month, in original boxes, with instructions, warranty cards, carrying pouch, and AA cell. These are the ones over which Bose apparently threatened legal action over patent infringements of some sort. The supplier gets $75 a set singly; if you're interested at $60 a set shipped domestically, pls email me, [EMAIL PROTECTED] off-reflector. TIA, HNY and 73, Dave, N3HE ___ 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] Second AF button... :-(
This is my second AF button that I must change since I built my K2 last spring. The button began to get loose again. Sometime the audio fade out a little bit and came out right after All the other one are OK, but it seems that the POWER button will do the same eventually... in my case. Hopefully, I have another one in stock... but I will order a few more today... Maybe a more heavy duty button will be good... at least for those who carry often their K2... 73 -- Jean-François Ménard, VA2VYZ Elecraft K2 #4130 -- ___ 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 PLL Oscillator Range Test failure (barely)
On page 60 of the K2 manual the PLL Reference Oscillator Range Test asks for the Ref. High Freq. and Ref. Low Freq. measurements. I have HI = 12099.67 LO = 12090.50 DIFF 9.17 which is less than the 9.8 to 15 kHz required by the manual. Everything else looks good. Any ideas? Any help would be appreciated. Thanks. -- Scott (NE1RD) PS What a beautiful kit. I'm loving it! B. Scott Andersen| Magic is real, unless declared integer. [EMAIL PROTECTED] | -- The collected sayings of Wiz Zumwalt Acton, Massachusetts | Ham: NE1RD, QRP ARCI#11588, FP#-910 ___ 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] Noise-reducing cans
It's not pasword protected the link had a typo, it should be a forward slash after roadwarriorcontent try http://www.thetravelinsider.info/roadwarriorcontent/planequietnc6headphones. htm 73 KI4DGH Chuck Gehring -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of William Johnson Sent: Monday, January 03, 2005 8:08 AM To: 'David J Windisch'; Elecraft@mailman.qth.net Subject: RE: [Elecraft] Noise-reducing cans The link is password protected. Bill -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of David J Windisch Sent: Monday, January 03, 2005 7:34 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] Noise-reducing cans Hi, all concerned: I have tinnitus and some hearing loss at age 61, and have found the PlaneQuiet NC-5 cans helpful in the shack and in the mfg shop where I'm a tech. They're light, and they reduce the racket from HVAC, refrigerators, freezers, amp blowers, computer blowers, and so on. http:www.thetravelinsider.info/roadwarriorcontent'planequietnc6headphones.ht m Some plans fell through, and I have 4 NC-5 sets which were new last month, in original boxes, with instructions, warranty cards, carrying pouch, and AA cell. These are the ones over which Bose apparently threatened legal action over patent infringements of some sort. The supplier gets $75 a set singly; if you're interested at $60 a set shipped domestically, pls email me, [EMAIL PROTECTED] off-reflector. TIA, HNY and 73, Dave, N3HE ___ 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 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 PLL Oscillator Range Test failure (barely)
Scott, Just to check, can you look at what the voltage swing is at U6 pins 1, 2 and 3 when you do the Ref High Freq and Ref Low Freq measurements? Compare to the voltage table on page 17 of Appendix E in the manual. If the voltage swings are not correct, you have a likely problem with the PLL thermistor board, but if the voltage swings are correct, you should look for the problem in the area of the PLL crystal and varactor diodes. First check the soldering carefully, and check all components shown in the scheatic associated with the PLL Reference oscillator area (upper left corner of RF board sheet 1 of 4). If you find all is OK soldering and component wise, it may just be that your crystal is not being pulled far enough. The cure for that is to change L31 to 12 uH instead of the 10 uH that is currently being shipped with the K2 kits. An e-mail to [EMAIL PROTECTED] should start a new inductor on its way to you. I believe Elecraft is still providing this replacement on an 'as needed' basis, free of charge. 73, Don W3FPR - Original Message - On page 60 of the K2 manual the PLL Reference Oscillator Range Test asks for the Ref. High Freq. and Ref. Low Freq. measurements. I have HI = 12099.67 LO = 12090.50 DIFF 9.17 which is less than the 9.8 to 15 kHz required by the manual. Everything else looks good. Any ideas? Any help would be appreciated. Thanks. ___ 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] crystal oven
If one does not plan on anything but cw/ssb is it necessry to install the crystal oven? tnx 73 Bill ___ 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] KNB2 Noise Blanker comments from N6KR
At 04:24 AM 1/2/2005, Stewart Baker wrote: On Sat, 1 Jan 2005 17:51:33 -0800, wayne burdick wrote: And now a word from the designer ;) -- I'm not sure when we'll be able to update the KNB2 design, but in the meantime, I'll be happy to answer questions for anyone who wants to try their hand at it. As must be obvious by now, we've worked hard to integrate promising modifications in a timely fashion. 73, Wayne N6KR A very comprehensive and interesting reply. Many thanks Wayne. 73 Stewart G3RXQ ___ 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] Mounting the KAT100-1 under the K2?
Is there anyone on this list who can confirm that the top cover screws of the KAT100-1 are directly inline with the bottom cover screws of the K2? Has anyone attempted to use 4-40 threaded rod and nuts to anchor the KAT100-1 beneath the K2? I would like to try that once I get my KAT100-1. Tom K2TA K2 #1117 ___ 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] free for the postage...
Basic Severe Storm Spotters Guide, Larry Ledwick, Emergency File Publications, Copyright 1996. Great reference for Skywarn active hams. ARES District 10 Severe Weather Training Handbook Reference Guide 1999. Produced for D10 but may be useful to others. I figure $2 for medial mail rate should cover the postage. -- 73, Rod N0RC ___ 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] Mounting the KAT100-1 under the K2?
Please ignore...there is not a 1:1 relationship between the screws on top of the KAT100-1 and the bottom of the K2. Drilling is required. - Original Message - From: Tom Althoff [EMAIL PROTECTED] To: Elecraft elecraft@mailman.qth.net Sent: Monday, January 03, 2005 3:26 PM Subject: [Elecraft] Mounting the KAT100-1 under the K2? Is there anyone on this list who can confirm that the top cover screws of the KAT100-1 are directly inline with the bottom cover screws of the K2? Has anyone attempted to use 4-40 threaded rod and nuts to anchor the KAT100-1 beneath the K2? I would like to try that once I get my KAT100-1. Tom K2TA K2 #1117 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: free for the postage...
Both items are spoken for. Thanks for the response. -- 73, Rod N0RC - Original Message - From: Rod N0RC [EMAIL PROTECTED] To: [EMAIL PROTECTED]; elecraft@mailman.qth.net Sent: Monday, January 03, 2005 2:49 PM Subject: [QRP-L] free for the postage... Basic Severe Storm Spotters Guide, Larry Ledwick, Emergency File Publications, Copyright 1996. Great reference for Skywarn active hams. ARES District 10 Severe Weather Training Handbook Reference Guide 1999. Produced for D10 but may be useful to others. :[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
[Elecraft] OT - Way off topic, but Dell is giving away machines
Until 1/5/05, you can get a Dell SC420, 2.5GHz Celeron, 1G Ram, 80G Harddrive, CD-Rom for $234. I just ordered 4! Dan / WG4S / K2 #2456 No affiliation, blah, blah, blah, I just lost 3 servers over the weekend and I'm OUT of spares and very nervous. ___ 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 - Way off topic, but Dell is giving away machines
It's a bear to find. www.dell.com, click small business, Click Servers, Storage and Networking, Scroll down a bit and click Customize it next to the $224 teaser (that's a 40G harddrive). Pay LOTS of attention. Some of the options have prices like remove $99. Don't know if this link will work for you, but you can drill in as above. http://configure.us.dell.com/dellstore/config.aspx?c=uscs=04kc=6W300l=en; oc=sc420sapps=bsd They are kind of high for disks, but the memory is decent. Dan -Original Message- From: NZ8J [mailto:[EMAIL PROTECTED] Sent: Monday, January 03, 2005 5:55 PM To: Dan Barker Subject: Re: [Elecraft] OT - Way off topic, but Dell is giving away machines Dan, Do you have a link for that? I can't find it on the Dell site.. Thanks for the heads-up Tim NZ8J ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Mounting the KAT100-1 under the K2?
It seems to me that the right way to do this is a set of side panels for the combined set of K2 and KAT100. Some day, maybe. 73, doug From: Tom Althoff [EMAIL PROTECTED] Date: Mon, 3 Jan 2005 17:31:32 -0500 Please ignore...there is not a 1:1 relationship between the screws on top of the KAT100-1 and the bottom of the K2. Drilling is required. - Original Message - From: Tom Althoff [EMAIL PROTECTED] To: Elecraft elecraft@mailman.qth.net Sent: Monday, January 03, 2005 3:26 PM Subject: [Elecraft] Mounting the KAT100-1 under the K2? Is there anyone on this list who can confirm that the top cover screws of the KAT100-1 are directly inline with the bottom cover screws of the K2? Has anyone attempted to use 4-40 threaded rod and nuts to anchor the KAT100-1 beneath the K2? I would like to try that once I get my KAT100-1. Tom K2TA K2 #1117 ___ 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 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] A minor C22 question
Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference. This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2. However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off. (After last night's adjustment, the zero beat was 1.03) One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer. The unit was thoroughly warmed before adjustment although there may be some temperature difference between having the cover on and having the cover off. This is hardly a big deal, but I wonder whether others manage to get an exact setting or whether this is a process that you repeat until you finally nail the adjustment. HOWARD W. ASHCRAFT, Jr. W1WF Direct Dial: (415) 995-5073 [EMAIL PROTECTED] HANSON 333 Market Street, 23rd Floor BRIDGETTSan Francisco, CA 94105-2173 MARCUS Direct: (415) 995-5073 VLAHOS Main: (415) 777-3200 RUDY, LLP Fax: (415) 541-9366 ___ 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 minor C22 question
Did you re-run CAL PLL, ** AND ** XFIL on ** ALL ** Modes (USB, LSB, CW, CWR, RTTY, RTTYR) ** AND ** when running CAL XFIL you MUST change the number (up or down at least on digit and then back to the same number) so that the MCU knows that it needs to re-store the frequency settings for the BFO. Otherwise you have changed nothing but the frequency of the reference oscillator. For a long explanation see W3FPR's discussion. The short one is that the MCU stores a digit representing the voltage necessary to make the frequency. This is number determined by the Reference oscillator whose accuracy determines the repeatability and accuracy across all bands. In other words the 4.0 MHz oscillator is only used for the frequency measurement. It only measures the frequency when you run the CAL FILL and CAL XFIL. After that it does nothing. Rich, KE0X --- Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference. This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2. However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off. (After last night's adjustment, the zero beat was 1.03) One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer. ___ 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 minor C22 question
HOWARD W. ASHCRAFT, Jr. W1WF wrote: Last night I redid my C22 reference oscillator adjustment using WWV on 10mhz as the zero beat reference. This is the third time I have adjusted C22 and each time I am able to adjust C22 to a precise offset balancing TP1 and TP2. However, when I put the cover back on the K2/100 I find that WWV zero beats a few tens of hz off. (After last night's adjustment, the zero beat was 1.03) One should expect to be +- 10 hz as that is the finest resolution of the VCO, but it would be nice to get a little closer. -- You are probably fighting the resolution limits of the digital-to-analog converters (DAC's) used to convert between the analog tuning voltages for the BFO and PLL reference oscillator and the digital values stored in memory. Since they convert the analog voltage into a binary number, and use that binary number to recreate the voltage later as you tune in a signal and choose the filter setting you want, they are never exact. Sometimes one is closer than 10 or 20 Hz, sometimes not. At that level it's a matter of luck. That's the source of often hearing a small step in the frequency of a CW beat note when switching between filters too. 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] Mounting the KAT100-1 under the K2?
It would be nice if there were side panels to do that plus a modified top cover on the KAT100-1 with recessed cups for the 4 feet of the K2 to drop down into so that when all was said and done the radio/tuner would become one unit, solid side panels and flush with no gap between them along the front mating edge. And wouldn't it be cool if the IO buss could be passed down directly into the KAT-100 instead of tying up the DB-9 connector at the back of both units. - Original Message - From: Doug Faunt N6TQS +1-510-655-8604 [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Sent: Monday, January 03, 2005 6:13 PM Subject: Re: [Elecraft] Mounting the KAT100-1 under the K2? It seems to me that the right way to do this is a set of side panels for the combined set of K2 and KAT100. Some day, maybe. 73, doug From: Tom Althoff [EMAIL PROTECTED] Date: Mon, 3 Jan 2005 17:31:32 -0500 Please ignore...there is not a 1:1 relationship between the screws on top of the KAT100-1 and the bottom of the K2. Drilling is required. - Original Message - From: Tom Althoff [EMAIL PROTECTED] To: Elecraft elecraft@mailman.qth.net Sent: Monday, January 03, 2005 3:26 PM Subject: [Elecraft] Mounting the KAT100-1 under the K2? Is there anyone on this list who can confirm that the top cover screws of the KAT100-1 are directly inline with the bottom cover screws of the K2? Has anyone attempted to use 4-40 threaded rod and nuts to anchor the KAT100-1 beneath the K2? I would like to try that once I get my KAT100-1. Tom K2TA K2 #1117 ___ 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 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] Mounting the KAT100-1 under the K2?
From: Tom Althoff [EMAIL PROTECTED] Date: Mon, 3 Jan 2005 19:20:04 -0500 It would be nice if there were side panels to do that plus a modified top cover on the KAT100-1 with recessed cups for the 4 feet of the K2 to drop down into so that when all was said and done the radio/tuner would become one unit, solid side panels and flush with no gap between them along the front mating edge. And wouldn't it be cool if the IO buss could be passed down directly into the KAT-100 instead of tying up the DB-9 connector at the back of both units. Note that there is an airvent on the bottom of the K2 for cooling the low power PA transistors, so airflow to that probably needs to be maintained. Otherwise you could just remove the feet of the K2. Maybe if you also removed the top cover of the KAT-100? Mine is loaned out, so I can't actually look at them. 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] KPA 100 Power requirements
Steve, the Astron has the ratings to handle the K2 plus 100 watts. It also has voltage regulator that should limit the current, so added breaker is optional. It should be slightly larger than the current draw of the K2 plus the amplifier, if used. If you do not use the breaker, be sure to fuse the K2 near the supply, although the K2 has a current limiting circuit of its own. That is standard safety practice in case the insulation rubs thru along the wires to the rig. 72, Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] AGC Threshold question - K2
Hi, I am just at the first alignment and test stage of my K2. Everything checked out just fine except the step where I am to adjust R1 on the control board for 3.80 v on pin 5 of U2. The highest I can get the voltage to go is 3.38v. Is this something to worry about? If so, any clues? Thanks Neal - k3nc ___ 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] KPA 100 Power requirements
I have an Astron 35 and the foldback circuitry is pretty nice. I had the two power leads that go from the KPA100 to the K2 pinched between the shield and the side of the case, making a nice dead short. My Astron just folded back the voltage and no fuses were wasted. I wouldn't suggest this as a test for anyone else. :) On Mon, 3 Jan 2005, Stuart Rohre wrote: Steve, the Astron has the ratings to handle the K2 plus 100 watts. It also has voltage regulator that should limit the current, so added breaker is optional. It should be slightly larger than the current draw of the K2 plus the amplifier, if used. -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ 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 PLL Oscillator Range Test failure (barely)
Scott; You definitely want the PLL reference to tune at least 9.8 kHz so you don't compromise the performance on 160 meters. If L31 is 10uH, going to 12uH will cure the problem without causing any bad side effects. You can ask Elecraft to send you the different value inductor. The narrow and wide tuning ranges that sometimes occur on the PLL reference are due to variations in the Q of the 12 MHz crystal. This is not always easy to control. Elecraft has implemented a tighter spec with the crystal vendor so this problem is less than it was in the past. -John KI6WX On page 60 of the K2 manual the PLL Reference Oscillator Range Test asks for the Ref. High Freq. and Ref. Low Freq. measurements. I have HI = 12099.67 LO = 12090.50 DIFF 9.17 which is less than the 9.8 to 15 kHz required by the manual. Everything else looks good. Any ideas? Any help would be appreciated. Thanks. ___ 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] AGC Threshold question - K2
Neil, Yes you apparently have something wrong. The voltage measurement comes from a purely resistive network fed by 8 volts, and there is not much to troubleshooting it - that is if you can manage to probe the pins of R-Pak RP6. With the RF gain in the full clockwise setting, you should read close to 0 volts on pin 6 of RP6 - and you should find 8 volts from the power source on pin 3 (of RP6). The voltage at pins 4 and 5 should be at the same voltage as pin 5 of U6, and the voltage should be adjustable by changing R1. The voltage on pin 7 of RP1 will depend on the setting of R1. Check out the schematic of the Control Board - look in the AGC section in the lower left corner to see how these resistors are connected. If you find a voltage that is unusual, first check the soldering, and next be certain RP6 is the 5.1k package (the numbers 512 should appear in the labeling). If the voltage on pin 3 of RP6 is much lower than 8 volts, the 8 volt regulator (U4) may be the problem. However, the last person I helped who had a reading similar to yours did not have the probe on pin 5 of U6. Pin 5 is the topmost pin and toward the side panel. 73, Don W3FPR - Original Message - I am just at the first alignment and test stage of my K2. Everything checked out just fine except the step where I am to adjust R1 on the control board for 3.80 v on pin 5 of U2. The highest I can get the voltage to go is 3.38v. Is this something to worry about? If so, any clues? ___ 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] NB design thoughts.
Just wanted to share my experience with the NB in one of my boat anchors, the yaesu FT-401B (tube rig) from the 70's. This NB works almost as good as the best ones I have tried, it does not introduce any distortion in even the strongest signals and has only an on-off switch. (no level adjustment from the rig's front panel even though it does have an internal one via a pot seen at the schematic). This is a NB working at the 3.180Mhz IF of the rig, and the only ill effect I have noticed when turning it on is a reduction of the IF gain which has never made any weak signal unreadable, and of course could be potentially compensated by one subsequent amplification stage anyway. It does though work VERY well for any type of pulse noise. Just with 2 prehistoric FETs and 2 transistors, it has to be the most basic NB design in any rig... Just some food for thought about future improvements in the KNB2 which may not necessarily have to be too complicated. For anyone interested, I have scanned a picture of the NB schematic at the following link: http://photothru.com/share_photoalbum.asp?aid=xA2EF4Bapwd=marko45966[EMAIL PROTECTED] If you have any trouble accessing it, I can email individual copie to anyone interested. 73, Marinos, ki4gin ___ 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] Hum Coupling
I remembered this thread and when I was looking at the slashdot article on RF shielding paint the other day, remembered that I had problems with my K2 and a flourescent Ott light, presumably from its transformer. I ordered some Metglas tape from these folks, and tried a few layers of it around the transformer, and near the K2, but there was no effect. I opened up the bottom of the K2 and noticed the greatest disturbance from the lamp transformer was around L31. That area also seemed to be the most sensitive to detuning when I put on and took off the cover (and my hand). So I put a few layers of the tape (insulated inside a poly) on top of L31 and there seemed to be a slight effect, but not enough to make me want to try to put it there. I may open the top and try L30. In better news, though, I found that moving the light from the left of the K2 to the right eliminated the modulation, at least on RX. Leigh. A Walker wrote: Hi Michael, Thanks for your comments. I think you are on to something. The only hope for lower magnetic field susceptibility for the K2 would be if either the VFO circuit were changed so as not to use an inductor for adjusting the quiescent resonance point of the VFO, or good magnetic shielding were used. One possibility would be to use a gapped pot core with slug tuning for L30, but it might be difficult to get sufficient adjustment range. Or, perhaps one could use some kind of shield for L30 alone. The standard sort of thing for low-level or precise RF circuits is to enclose them all in steel shielding, with steel partitions between circuit sections or stages (it's called egg crating). It's something Elecraft could keep in mind for a K3. If I had a K2 in front of me, I think I would try to put some kind of shielding around L30. Here is the web site of one vendor of shielding materials: http://www.lessemf.com/mag-shld.html By the way, I would guess that the Q of that Toko T1005 coil is determined by not only DC resistive loss in the wire, but also skin effect loss and core loss (and circulating currents from distributed capacitance, etc., etc.). I suppose we will never know for sure, as RF work at some point gets very empirical -- we just have to try it out, and if it works we're on to solving the next problem. Best of luck, 73, Allen Walker From: Masleid, Michael A. [EMAIL PROTECTED] To: A Walker [EMAIL PROTECTED] CC: Elecraft@mailman.qth.net Subject: RE: [Elecraft] Hum Coupling Date: Wed, 03 Nov 2004 13:01:47 -0600 Hello Allen, My guess is that magnetic fields from power transformers are either 1) being picked up by L30, or 2) that the magnetic fields are going through the cores of L30 and/or T5, and modulating the effective permeabilities of these cores. This will cause a modulation of inductance, and thus a modulation of the VFO frequency. The magnetic field is picked up by L30. To work best, the magnetic shield should completely surround the susceptible parts. Putting the shield on only one side seems to make things worse. Here's a possibility for experimenting with K2 susceptibility: Try using one of those bulk tape erasers near it. They put out huge 60Hz fields. [Just don't get it near your credit/bank cards!] Of course, keep it away from the latching relays. I used a tape head demagnetizer. Placing the probe near the base of L30 causes a vast huge amount of FM. Don't try this unless you cut the current way down. Looking on the scope, FM modulation is at 60 Hz, not 120 Hz, so we're not modulating the permeability, we seem to be inducing a 60 Hz voltage onto L30/T5 which is modulating the varacters. What I don't understand is this: I figure L30 has perhaps 14 turns, and 2.3 ohms winding resistance. I figure that the effective aperture is 1 cm squared. I figure that the winding resistance of T5 is 0.05 ohms, so a 1 gauss vertical 60 Hz field will induce 37 micro volts on T5. That should cause 0.3 Hz FM modulation on 80 meters. No one should notice that? BTW, I calculated 2.3 ohms from the Q, sensitivity at T5 goes way up if L30 has less resistance. I know that the cup and core used in L30 will focus any external field through the winding, but I don't know how to calculate how much. It would be nice if someone could put an L30 (TOKO T1005Z 4.7 uH) into a Helholtz coil and get the numbers on it (uV/gauss at 60Hz, winding resistance). 73, Michael __ ___ 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 - Way off topic, but Dell is giving away machines
Wow! Now, there is no excuse for not being able to do digital modes!! Ron wb1hga ___ 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
Fw: [Elecraft] 10m Birdie
I never operate 10M but just checked my K2 with the KPA100 and found the same thing with a strong birdie at around 28262. The weird thing is that when I turned off the KPA100 (reducing power below 10W) the birdie at 28262 shifted up about 1kc and the birdie at 28019 shifted down about 500c. Russ, N3CO K2 #4016 - Original Message - From: [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Sunday, January 02, 2005 11:19 AM Subject: [Elecraft] 10m Birdie In order to get a match at 28019 kHz as has been reported,= the KPA100 oscillator has to be shifted to 18434.1 Hi also have the 28029 birdie. I've also got the much stronger= 28262 birdie. I've wanted to eliminate this for some time since there a lot of= cw activity between 28025 and 28025. My KPA100 is installed on the K2. The= birdie produces about 1 s unit bar with the pre-amp on. Based on Sverre= comments, how do I eliminate the birdie? Is it merely the freq of the 18= MHz oscillator. Frank, W4FMS ___ 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 Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/04 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/04 ___ 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] Questions from a Possible Builder/Owner
I've only been licensed about three years but have been building electronic kits and related hardware since 1954. My intent is to build a K2/100 with most of the bells and whistles but have been unable to find specific answers to three questions. 1. How does the K2/100 key an RF amplifier (AL-811)? I have a Heil footswitch with a second cable for amplifier keying. But, would prefer to use keying from the rig itself. 2. How is ALC sent from my RF amplifier back to the K2/100? I've reviewed the K2/100 manuals and cannot find how it is done. Maybe it really isn't needed. 3. How do I adapt my Heil Headset Pro and Goldline microphones. They currently are used with an IC-746pro by using a Heil adapter cable. They now go thru a homebrew switchbox with the adapter cable between the rig and switchbox. I cannot see any other major problems. I've wound baluns and view winding toroids a bit tedious but there is nothing like rolling your own. My background includes professional soldering training and experience. I have a scope, DVM and other minor pieces of test equipment. Am I over looking any major areas that need to be covered before starting? Thank you for your response. Jim, AB0UK __ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Power supply for K1 / K2
I got a new Scanner for Christmas and no longer use the UMAX scanner. Noted that it had a small 12VDC switching power supply. Checked out the voltage, polarity, current rating, etc and decided it would work as a neat SMALL portable P/S for the K1/K2 when on trips. In researching the P/S found this link and they are only $19.95 US. They work on 90 to 265 VAC so they should be good for overseas and probably available over there also. NOT good for charging the internal battery if you have one but would partially restore and keep from discharging. K2 is much lighter without it - unless you must go portable. Here is a link. http://www.umax.com/scanners/index.jsp?cate=Scanners%3A+Accessoriesskunum=6 8300061- (The above is a long link so you may need to paste it back together.) Here is a link for the Specifications. http://www.powerstream.com/z/SA0612.pdf I have no interest in UMAX and am in no way affiliated with them. Just thought this was a good deal. Rich, KE0X ___ 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
Fw: [Elecraft] Questions from a Possible Builder/Owner
From: Gregg R. Lengling [EMAIL PROTECTED] To: Jim Harris [EMAIL PROTECTED] Sent: Monday, January 03, 2005 9:09 PM Subject: Re: [Elecraft] Questions from a Possible Builder/Owner See my answers interleaved after the questions. Gregg R. Lengling, W9DHI, Un-Retired K2/100 SN 3075 http://www.milwaukeehdtv.org - Original Message - From: Jim Harris [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Monday, January 03, 2005 9:05 PM Subject: [Elecraft] Questions from a Possible Builder/Owner I've only been licensed about three years but have been building electronic kits and related hardware since 1954. My intent is to build a K2/100 with most of the bells and whistles but have been unable to find specific answers to three questions. 1. How does the K2/100 key an RF amplifier (AL-811)? I have a Heil footswitch with a second cable for amplifier keying. But, would prefer to use keying from the rig itself. Just use the keying output from the KPA100, I'm sure you remember putting in the FET and RCA Jack for it. 2. How is ALC sent from my RF amplifier back to the K2/100? I've reviewed the K2/100 manuals and cannot find how it is done. Maybe it really isn't needed. There is no ALC and most operators don't have a problem with it. 3. How do I adapt my Heil Headset Pro and Goldline microphones. They currently are used with an IC-746pro by using a Heil adapter cable. They now go thru a homebrew switchbox with the adapter cable between the rig and switchbox. Why not make a cable to go from your switchbox to the K2 for the basic K2 jack wiring (all the jumper posts directly across), if you need bias voltage for the mics you probably already created it in your switch box, if you didn't you can create it from the K2 as per the instructions included with any of the Heil mics from Elecraft. I cannot see any other major problems. I've wound baluns and view winding toroids a bit tedious but there is nothing like rolling your own. My background includes professional soldering training and experience. I have a scope, DVM and other minor pieces of test equipment. Am I over looking any major areas that need to be covered before starting? You're pretty much ready to go, I also used a Service Monitor to do receiver and transmitter alignment and freq. setting but it's really not required. Thank you for your response. Jim, AB0UK __ Do you Yahoo!? The all-new My Yahoo! - Get yours free! http://my.yahoo.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Fw: [Elecraft] 10m Birdie
I never operate 10M but just checked my K2 with the KPA100 and found the same thing with a strong birdie at around 28262. The weird thing is that when I turned off the KPA100 (reducing power below 10W) the birdie at 28262 shifted up about 1kc and the birdie at 28019 shifted down about 500c. Russ, N3CO K2 #4016 - Original Message - From: [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Sunday, January 02, 2005 11:19 AM Subject: [Elecraft] 10m Birdie In order to get a match at 28019 kHz as has been reported,= the KPA100 oscillator has to be shifted to 18434.1 Hi also have the 28029 birdie. I've also got the much stronger= 28262 birdie. I've wanted to eliminate this for some time since there a lot of= cw activity between 28025 and 28025. My KPA100 is installed on the K2. The= birdie produces about 1 s unit bar with the pre-amp on. Based on Sverre= comments, how do I eliminate the birdie? Is it merely the freq of the 18= MHz oscillator. Frank, W4FMS ___ 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 Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/04 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/04 ___ 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] Questions from a Possible Builder/Owner
Jim Harris wrote: 1. How does the K2/100 key an RF amplifier (AL-811)? I have a Heil footswitch with a second cable for amplifier keying. But, would prefer to use keying from the rig itself. It has a built-in transistor switch that will switch +200V at 1A. It goes low at least 15ms before the RF starts flowing and has an adjustable hold time. 2. How is ALC sent from my RF amplifier back to the K2/100? I've reviewed the K2/100 manuals and cannot find how it is done. Maybe it really isn't needed. Amplifier ALC isn't supported. My feeling is that it isn't needed, especially in view of the K2's closed-loop power control system. 3. How do I adapt my Heil Headset Pro and Goldline microphones. They currently are used with an IC-746pro by using a Heil adapter cable. They now go thru a homebrew switchbox with the adapter cable between the rig and switchbox. Sorry, I'm a CW operator! But lots of guys are using them. I cannot see any other major problems. I've wound baluns and view winding toroids a bit tedious but there is nothing like rolling your own. My background includes professional soldering training and experience. I have a scope, DVM and other minor pieces of test equipment. Am I over looking any major areas that need to be covered before starting? Nope, just follow the instructions carefully and don't work when you haven't slept for the past couple of days and you will do fine. And if you have a problem, there's plenty of experienced help available. -- 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] wireless headfones?
Has anyone tried wireless headfones such as these with their K2? http://www.radioshack.com/product.asp?catalog%5Fname=CTLGproduct%5Fid=33-1219 I am curious how they handle being around a transmitting ham radio. The idea of being able to walk into the kitchen to refill a cup of coffee without losing half the QSO is appealing... tnx, Fred kt5x ___ 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] Questions from a Possible Builder/Owner
Hi Jim, 1. How does the K2/100 key an RF amplifier (AL-811)? I have a Heil footswitch with a second cable for amplifier keying. But, would prefer to use keying from the rig itself. The KPA100 has a built-in solid state keying circuit for positively keyed amplifiers (like your AL-811). There is an RCA jack on the back of the KPA100 and you simply connect an RCA male cable from it to the Relay jack on the AL-811. There is no need for a second cable. 2. How is ALC sent from my RF amplifier back to the K2/100? I've reviewed the K2/100 manuals and cannot find how it is done. Maybe it really isn't needed. The K2/100 does not have any provision for ALC input from an external source. ALC from the AL-811 amplifier back to the K2 is not necessary. Since ALC from an external amplifier is generated after the fact it does little to control the generation of distortion products that result from the amplifier being overdrive. In most amateur amplifiers, in order for an ALC voltage to be generated , the amp must be overdriven in the first place! Obviously this is not good! Of couse, the power control on the K2/100 can always be set to a level such that various amplifiers are not overdriven. 3. How do I adapt my Heil Headset Pro and Goldline microphones. They currently are used with an IC-746pro by using a Heil adapter cable. They now go thru a homebrew switchbox with the adapter cable between the rig and switchbox. The microphone input circuit in the K2 has provisions on a jumper block to route functions to various pins according to which microphone you wish to use. These options are explained and individual choices are made during construction of the K2. I am not familier with the requirements of the Heil Headset Pro and the Goldline microphones but at the worst, you might have to construct a simple one transistor pre-amplifier to use them with the K2. I'm sure you will get responses from others who have use these microphones with their K2's. Have fun - it's quite the impressive rig!! 73 es gud dxing --don n4hh K2/100/KAT100 #2028 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/04 ___ 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] Hum Coupling
Thanks! The foil is supposed to have be very good for magnetic shielding and so I thought I would try it, as it is small and light enough that it could be put inaide the rig if it works. I will report when I try it on L30. Leigh. On Mon, 3 Jan 2005 6:53 pm, Stuart Rohre wrote: Leigh, most of your coupling may be magnetic, if shielding did not reduce the RFI. You might want to experiment with steel shim stock or even tinplate from cans. The easiest fix is distance: Moving the rig away from magnetic and electric field sources of transformers as you have found. GL, Stuart K5KVH ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] OT - Way off topic, but Dell is giving away machines
At the top of the configuration list: Note: For server use only; CANNOT BE USED AS A DESKTOP. Dell does not support the use of a graphics card on the SC420. Still, a great price. The other desktops they're selling are priced well. Paul NN0C -Original Message- From: [EMAIL PROTECTED] [mailto:elecraft- [EMAIL PROTECTED] On Behalf Of ron Sent: Monday, January 03, 2005 7:37 PM To: 'Dan Barker'; 'Elecraft' Subject: RE: [Elecraft] OT - Way off topic, but Dell is giving away machines Wow! Now, there is no excuse for not being able to do digital modes!! Ron wb1hga ___ 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] [Fwd: thanks]
Original Message Subject:thanks Date: Thu, 30 Dec 2004 18:14:53 -0600 From: Robert Conley [EMAIL PROTECTED] To: [EMAIL PROTECTED] GE Mychael, I just wanted to say thanks for the excellent job that you did on my toroids. It probably cut my built time by at least 40%. I have some residual stroke damage ( fine motor control ) in my left hand and winding toroids is a challenge to say the least, but I do so enjoy building my own. K1 #1949 is finished but now I need to find the problem of No Power Out I built an RF probe inside an in-line fuse holder and I have an O'scope so the difficulty will be discovered and corrected with help from others on the reflector. Thanks again! 72/71 de rc kc5wa No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.298 / Virus Database: 265.6.7 - Release Date: 12/30/2004 ___ 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] wireless headfones?
Fred and All, I do it all the time! I use an RCA wireless headphone system that cost about $50 on sale. Works great. I can go through most of the house and still hear fine. It can get spotty in places. Be careful though. Not all of these systems work that well. Some time back I had a system that only worked across the room, but not from other rooms. The system I have now is RCA model WHP150. I have a second RCA system (WHP140) which I use in the bedroom for watching TV without disturbing my wife if she wants to sleep. By connecting to one of the audio output jacks on the back of the TV set, I can mute the TV sound without affecting the output to the headphone system. Both systems seem to work equally well. In fact, by slightly changing the frequency setting on the headphone I can hear the other system. These are 900 mhz systems. Guess what--you can also use a 2 meter HT with wideband receive to monitor if you like. Dave W7AQK ___ 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] Hum Coupling
Leigh, most of your coupling may be magnetic, if shielding did not reduce the RFI. You might want to experiment with steel shim stock or even tinplate from cans. The easiest fix is distance: Moving the rig away from magnetic and electric field sources of transformers as you have found. GL, Stuart K5KVH
