[Elecraft] [K3] APF and Pitch
Someone mentioned that APF rings less when pitch tone is set to 440 Hz instead of 800 Hz. So, I'm trying and it indeed seems to ring less. Anyone else hearing this? Is this some DSP effect or a psychoacustic effect? Condition of test: 200Hz 5-pole filter DSP BW 50Hz RF gain backed so that signal is barely audible with no APF RX Audio EQ bands 4 and 5 set to 0, all rest down -6 Pf -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2: Low Output Only on 160M
Don, thanks for your reply. I do not understand your reference to page 14. Page 14 in my manual is nothing but resistors being installed. I have noticed that it is drawing 3.3 amps when set for 2 watts and displays Hi-Cur. I have checked all the components you mentioned and everything appears to be correct. Checking the TP1, I get 6714 khz. - Original Message - From: Don Wilhelm w3...@embarqmail.com To: mtebe...@mchsi.com Cc: elecraft@mailman.qth.net Sent: Saturday, May 11, 2013 2:57:55 PM GMT -06:00 US/Canada Central Subject: Re: [Elecraft] K2: Low Output Only on 160M Mike, The easiest way to troubleshoot that problem is to isolate the problem to the failing stage. Use the RF Probe and measure the points given for the transmit path starting halfway down the left column on page 14 Making those measurements on 40 meters will not be meaningful for your problem, but if you switch between 80 meters (or another working band) and 160 meters, you can compare the amount of RF voltage at each stage. Make the measurements in the order listed. The first point where the RF voltage is significantly lower on 160 meters is a likely suspect. Possible problem spots are: 1) The Transmit Buffer - are C94 and C150 the correct values and well soldered? 2) The Bandpass Filter - are C13 and C14 the correct value (1200 pF marked 122) and well soldered? Check the VFO frequency at TP1 with the internal counter probe when tuned to 1800 Hz. It should be near 6715 kHz. If it is not, check the value and soldering of C75 (470 pF marked 471). Low pass filter problems usually result in both low power out and high current draw, but check the soldering of the K160RX toroids again. Make certain the toroid leads are in the correct holes. 73, Don W3FPR On 5/11/2013 10:57 AM, Michael Eberle wrote: Hi, I am having problems with my output power on 160M. It will only put out about 1.5 watts when set for 10 watts. On all the other bands I am getting between 9.4 and 10.3 watts. I have double checked capacitors in the BPF section, double checked capacitors and counted turns on toroid inductors on the low pass filter board and found nothing obviously wrong. relay K3 is switching properly and I really don't know what else to check. It is my guess that someone on here will know exactly what I did wrong or some other things to check. Thanks, Mike KI0HA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KPA500 - power out question
I am considering replacing my 3-500 amplifier (puts out approximately 850 Watts) with the KPA500. My question: What have users been experiencing as output power in the real world? Specifications make great reading, but I am interested in what is real. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained. Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K2: Low Output Only on 160M
Sorry, that page 14 is at the back of the manual in the Troubleshooting Appendix. 73, Don W3FPR On 5/12/2013 5:50 AM, mtebe...@mchsi.com wrote: Don, thanks for your reply. I do not understand your reference to page 14. Page 14 in my manual is nothing but resistors being installed. I have noticed that it is drawing 3.3 amps when set for 2 watts and displays Hi-Cur. I have checked all the components you mentioned and everything appears to be correct. Checking the TP1, I get 6714 khz. - Original Message - From: Don Wilhelm w3...@embarqmail.com To: mtebe...@mchsi.com Cc: elecraft@mailman.qth.net Sent: Saturday, May 11, 2013 2:57:55 PM GMT -06:00 US/Canada Central Subject: Re: [Elecraft] K2: Low Output Only on 160M Mike, The easiest way to troubleshoot that problem is to isolate the problem to the failing stage. Use the RF Probe and measure the points given for the transmit path starting halfway down the left column on page 14 Making those measurements on 40 meters will not be meaningful for your problem, but if you switch between 80 meters (or another working band) and 160 meters, you can compare the amount of RF voltage at each stage. Make the measurements in the order listed. The first point where the RF voltage is significantly lower on 160 meters is a likely suspect. Possible problem spots are: 1) The Transmit Buffer - are C94 and C150 the correct values and well soldered? 2) The Bandpass Filter - are C13 and C14 the correct value (1200 pF marked 122) and well soldered? Check the VFO frequency at TP1 with the internal counter probe when tuned to 1800 Hz. It should be near 6715 kHz. If it is not, check the value and soldering of C75 (470 pF marked 471). Low pass filter problems usually result in both low power out and high current draw, but check the soldering of the K160RX toroids again. Make certain the toroid leads are in the correct holes. 73, Don W3FPR On 5/11/2013 10:57 AM, Michael Eberle wrote: Hi, I am having problems with my output power on 160M. It will only put out about 1.5 watts when set for 10 watts. On all the other bands I am getting between 9.4 and 10.3 watts. I have double checked capacitors in the BPF section, double checked capacitors and counted turns on toroid inductors on the low pass filter board and found nothing obviously wrong. relay K3 is switching properly and I really don't know what else to check. It is my guess that someone on here will know exactly what I did wrong or some other things to check. Thanks, Mike KI0HA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] APF and Pitch
I operate almost exclusively CW and my APF is never turned off. I use a 400 Hz filter, BW set at @350 Hz, and a pitch setting of 440 Hz. FWIW, I hear -no- ringing. 73! Ken - K0PP On Sun, May 12, 2013 at 8:25 AM, Pierfrancesco Caci p...@tippete.net wrote: Someone mentioned that APF rings less when pitch tone is set to 440 Hz instead of 800 Hz. So, I'm trying and it indeed seems to ring less. Anyone else hearing this? Is this some DSP effect or a psychoacustic effect? Condition of test: 200Hz 5-pole filter DSP BW 50Hz RF gain backed so that signal is barely audible with no APF RX Audio EQ bands 4 and 5 set to 0, all rest down -6 Pf -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] OT: Happy Mother's Day
Happy Mother's Day to all the YLs out there who own and/or support and work at Elecraft. Also a special shout out to the wives and mothers of us hams who tolerate/support us and our interests in ham radio. This is my wife's Susy first Mother's Day and we are going to celebrate it at the world famous San Diego zoo with Maximiliano our nine month old son. So not a big radio day ahead! Wishing all you YLs a Happy and Wonderful Mother's Day!!! Keith AK6ZZ Sent from my iPhone please excuse typos __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] APF and Pitch
I believe that you'll find that is true of any filter. By cutting the tone frequency almost in half (800 to 440 Hz), you almost double the effective width of the passband. That leaves more room for the keying sidebands which means less ringing or stretching of the keying transitions. (I like lower frequency tones too.) 73 Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Sent: Sunday, May 12, 2013 1:25 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [K3] APF and Pitch Someone mentioned that APF rings less when pitch tone is set to 440 Hz instead of 800 Hz. So, I'm trying and it indeed seems to ring less. Anyone else hearing this? Is this some DSP effect or a psychoacustic effect? Condition of test: 200Hz 5-pole filter DSP BW 50Hz RF gain backed so that signal is barely audible with no APF RX Audio EQ bands 4 and 5 set to 0, all rest down -6 Pf -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] APF and Pitch
thanks Ron, I guess this relates to Q=f/deltaf ? Didn't even think of this, and it's interesting that the effect is noticeable at these frequencies. Pf Ron == Ron D'Eau Claire r...@cobi.biz writes: Ron I believe that you'll find that is true of any filter. By cutting the tone Ron frequency almost in half (800 to 440 Hz), you almost double the effective Ron width of the passband. That leaves more room for the keying sidebands which Ron means less ringing or stretching of the keying transitions. Ron (I like lower frequency tones too.) Ron 73 Ron AC7AC Ron -Original Message- Ron From: elecraft-boun...@mailman.qth.net Ron [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Ron Sent: Sunday, May 12, 2013 1:25 AM Ron To: elecraft@mailman.qth.net Ron Subject: [Elecraft] [K3] APF and Pitch Ron Someone mentioned that APF rings less when pitch tone is set to 440 Hz Ron instead of 800 Hz. So, I'm trying and it indeed seems to ring less. Ron Anyone else hearing this? Ron Is this some DSP effect or a psychoacustic effect? Ron Condition of test: Ron 200Hz 5-pole filter Ron DSP BW 50Hz Ron RF gain backed so that signal is barely audible with no APF RX Audio EQ Ron bands 4 and 5 set to 0, all rest down -6 Ron Pf Ron -- Ron Pierfrancesco Caci, ik5pvx -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
Bill, Would you be willing to share the data you gathered with the rest of the group? I just (as of late last night) replaced my AL-811H with a KPA500. My tests showed output of 530-550 watts with 35 watts drive from my K3. I'm very pleased with that result. Thanks and 73, -- Ian Ian Kahn, KM4IK Roswell, GA EM74ua km4ik@gmail.com K3 #281, P3 #688 HRD v5.x/6.0 Test Team -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill Sent: Sunday, May 12, 2013 9:05 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 - power out question Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained. Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 no power out
Hi Just an update on the no power problem I reported last month. After checking a series of RF voltages using a checklist from Gary I located the problem as no RF from the KREF3 board at J65 I then removed the KREF board and all the cables, inspected board and re assembled the KREF3 and reinstated the cables. Since then the problem has not recurred. So it could have been a poor contact on the KREF3 cabling. It was not downstream of the KREF3 73 and thanks to Gary Bob G3PJT __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] APF and Pitch
Right, Pf. Also, the larger percentage of difference between two signals at lower audio frequencies makes it easier to filter the unwanted signal out, either with a physical filter or using the gray matter filter between our ears. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Pierfrancesco Caci Sent: Sunday, May 12, 2013 9:19 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] APF and Pitch thanks Ron, I guess this relates to Q=f/deltaf ? Didn't even think of this, and it's interesting that the effect is noticeable at these frequencies. Pf __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
My KPA500 puts out 600-650 watts with 35 watts drive on all bands. I'm not sure exactly what's going on with people getting 350 watts out. I'd guess those reporting 350 watts are running high duty cycle modes, like RTTY or AM. People listening to your signal will likely notice very little difference going 850 watts to 600 watts output. However, the KPA500 adds 6 meters, QSK and auto bandswitching, which for me was worth more than the 3dB I was losing going from 1300 watts to 650. 73, Scott, N9AA On 5/12/13 9:05 AM, Bill wrote: Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained. Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
I still see people reading the SSB signal as low power on the meter and believing it is PEP. Depends on who is reading the meter and the peak/average setting as well. 73, Jim KG0KP -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Scott Manthe Sent: Sunday, May 12, 2013 12:29 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA500 - power out question My KPA500 puts out 600-650 watts with 35 watts drive on all bands. I'm not sure exactly what's going on with people getting 350 watts out. I'd guess those reporting 350 watts are running high duty cycle modes, like RTTY or AM. People listening to your signal will likely notice very little difference going 850 watts to 600 watts output. However, the KPA500 adds 6 meters, QSK and auto bandswitching, which for me was worth more than the 3dB I was losing going from 1300 watts to 650. 73, Scott, N9AA On 5/12/13 9:05 AM, Bill wrote: Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained. Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
My KPA500 loafs at 400W with about 30W of drive (UK legal limit), driven to max power it's about 650W with 35W. I think the disparity between results may be down to the type of load being driven. Best regards, Tim Hague, M0AFJ Skype m0afj.Tim Sent on my iPad On 12 May 2013, at 18:29, Scott Manthe scott.man...@gmail.com wrote: My KPA500 puts out 600-650 watts with 35 watts drive on all bands. I'm not sure exactly what's going on with people getting 350 watts out. I'd guess those reporting 350 watts are running high duty cycle modes, like RTTY or AM. People listening to your signal will likely notice very little difference going 850 watts to 600 watts output. However, the KPA500 adds 6 meters, QSK and auto bandswitching, which for me was worth more than the 3dB I was losing going from 1300 watts to 650. 73, Scott, N9AA On 5/12/13 9:05 AM, Bill wrote: Thanks to all who answered. I didn't know there was such a perceived difference, at the receiving end, between 500 Watts and 850 Watts. I have always been under the impression that doubling of power (3 db gain) was the least discernible difference and that if you did not, at a minimum, double your power - there was really little to be gained. Also, I am amazed at the reported differences in power - from 350 Watts to 600 Watts. That is a rather large disparity. Thanks, Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
I received many direct emails - far more than are posted here. As they were sent to me directly, I assume the sender's did not wish to share. Hence, I would not feel comfortable in sharing same. Suffice to say: Most emailers are happy with the KPA500 and do recommend it. However, based on a number of comments, I do think I will purchase the 500 Watt tuner box also. Bill W2BLC __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
Bill, I suspect it has more to do with the default reply nature of the group, in that replies are sent straight back to the originator of the message rather than to the group itself. It's not typical of the way that groups tend to be set up these days and so catches us all out from time to time! If I may add my indirect experience of the KPA500 in that a good friend of mine bought one, he too very quickly followed up with an order for the KAT500 and is, I believe, very happy with its performance. 73 Stephen G4SJP On 12 May 2013 20:35, Bill b...@w2blc.net wrote: I received many direct emails - far more than are posted here. As they were sent to me directly, I assume the sender's did not wish to share. Hence, I would not feel comfortable in sharing same. Suffice to say: Most emailers are happy with the KPA500 and do recommend it. However, based on a number of comments, I do think I will purchase the 500 Watt tuner box also. Bill W2BLC __**__**__ Elecraft mailing list Home: http://mailman.qth.net/**mailman/listinfo/elecrafthttp://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.**htmhttp://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.**net Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] APF and Pitch
I use 350 hz pitch and with a decent signal the APF works okay although its not really needed under those conditions. When the signal is very very weak it is hard for me to tell when the stations stops sending, ie the ring from noise burst sounds the same as the station transmitting. For that reason it is very annoying. I have spent time on 160 trying to copy something with APF that I cant without but cant find where it really helps. It does sound neat when you turn it on and peak up signals and maybe if there were no noise burst at all it might be more useful. I use dual QF-1A audio filters for stereo while has more control for me being able to control each ear separately. 73 Mike K4PI __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] SVGA Adapter and Computer Link Failure
At the recent IDXC in Visalia, I bought the SVGA adapter for my P3. It works just fine but I've noticed an apparent bug that I can't explain. When just the panadapter display (with the waterfall) is showing, the K3/P3 link to my PC's logging program (CommCat) remains stable. When the Rx and Tx data windows are displayed on the external monitor, however, the computer link goes down. I can reconnect, but within minutes the link is lost again, and this happens no matter how many times I reconnect. Has anyone else seen this problem? Does anyone have a solution for it? --Jeff, K6JW __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Resistance checks on RF board page 38
Good evening Don, Here is what I have done, 1. I have tried reversing the leads on the DMM and the readings for lets say U1 pin 4 to ground went from 3.9 mega ohms to 2.9 mega ohms. so not really the reading I am looking for. 2. I heated up all the solder connections on the board and added solder where needed. I am using the WES51 iron turned all the way up. Here is one of my trouble shooting paths I did for U1 pin 4. 1. From U1 pin 4 to K13 pin 10.result .02 ohmsa good result 2. From U1 pin 4 to K13 pin 1...result 239.8 ohms a good result as this is the coil of K13 3. From U1 pin 4 to K9 pin 1.result 239.8 ohms a good result as again this is coil of K13 only. 4. From U1 pin 4 to K9 pin 10...result 480.6 ohms a good result reading coils from K13 and K9. 5. From U1 pin 4 to U1 pin 13...result 480.6 ohms a good result again reading both coils K13 and K9 Note C82, C57 and C208 are in this circuit but not as yet installed. Now I go from ground to Pin 4 and am reading in the Mega ohms. And no matter which ground point I go to I get the same high ohm reading. As for R1 and R2 1. On R1 going from bottom terminal (terminal above R2) to C1 top side and get reading of .02 ohms...this is good 2. From same position on R1 again to other side of C1 and get OL. 3. I then go from the same position on R1 again to ground and again get OL. Not sure where to go next Don. Mike VE3WDM -- View this message in context: http://elecraft.365791.n2.nabble.com/Resistance-checks-on-RF-board-page-38-tp7573563p7573597.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] OT : Reading Elecraft Digest
Rick, I don't have an exact answer for you, BUT -- I would suggest that you not use the digest mode. Instead sign up for individual emails *AND* set up your email client (either on your computer or on webmail) with a filter that puts all emails with [Elecraft] in the subject line into a separate folder in your email.Inbox. All email clients and webmail that I have known about have provisions for creating filters like that. This will effectively create your own individual 'digest'. When you want to look at your 'digest', just open that folder and all the messages will be there - no clutter in your main Inbox, it is all in a separate and dedicated folder. If you are expecting an answer to a post you made, you can check your Elecraft folder more frequently instead of waiting for the daily digest to be compiled and sent to you. If you want to delete all messages for any given period of time after reviewing them, yes, you will have to highlight the whole batch of messages before pressing Delete, but that is an easy thing to do IMHO. Or delete individual posts that you have no interest in and keep those you want for future reference, still easy. You can even create subfolders within that Elecraft folder for K2, K3, KX3, OT, etc. That works well if everyone pays attention and puts that info in the subject line, some do, others forget to do it. For me, this is a lot easier than combing through the digest to find posts of interest, and I consider it a big plus is that I can click on any single message and select Reply, Reply All, or Reply to List as I choose (I am using Thunderbird for my local email client, but it works for web mail too). If I were receiving the digest, I would have to delete the non-relevant posts when creating a response. The other option is to sign up for No Mail and look at the posts on Nabble (when Nabble is working correctly, I understand sometimes it gets behind a bit) 73, Don W3FPR On 5/10/2013 2:03 PM, Rick Wheeler wrote: I have both a yahoo and gmail account for email. I primarily use the yahoo account. Recently yahoo has decided that the 'classic' version of their format will be permanently discontinued by June 3. So I begrudgingly switched the the new format. In a nutshell, I don't like it; and plenty of forums that state the same. When reading the digest in the classic version the posts were displayed FB and it was relatively easy to follow threads. Now the posts are not clearly defined, they do not have the subjects listed, etc. I think the old school DOS looked better! Same with gmail. A real chore to read. So what is a good way to download and read the digest? I tried to Google the subject and came up empty. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] Resistance checks on RF board page 38
Mike, The place to go next is to continue onto page 39 of the manual. Note that for those values listed have a symbol - which means 'greater than' (see page 22, top of the 2nd column). A reading in the Megohms range is definitely greater than 20k, so no problem. The same thing applies to the R1 and R2 readings - greater than 1 megohm can be an infinite reading, which apparently your meter indicates as OL (overload) - it should be the same thing as is displayed with the probes connected to nothing. Some meters show a 1 in the 1st digit position for an infinite resistance condition, others blink the display, and others indicate OL as yours does. Know how your meter responds to an infinite resistance (open leads) and also to zero ohms - and be aware of the meter range, especially if using auto-ranging. An old wise saying among the lab engineers I worked with was Test Engineer, know your tools, and know when *not* to believe them - refer to the manual for your tool if there is any question about what is being indicated, many are different in subtle ways. 73, Don W3FPR On 5/12/2013 5:14 PM, VE3WDM wrote: Good evening Don, Here is what I have done, 1. I have tried reversing the leads on the DMM and the readings for lets say U1 pin 4 to ground went from 3.9 mega ohms to 2.9 mega ohms. so not really the reading I am looking for. 2. I heated up all the solder connections on the board and added solder where needed. I am using the WES51 iron turned all the way up. Here is one of my trouble shooting paths I did for U1 pin 4. 1. From U1 pin 4 to K13 pin 10.result .02 ohmsa good result 2. From U1 pin 4 to K13 pin 1...result 239.8 ohms a good result as this is the coil of K13 3. From U1 pin 4 to K9 pin 1.result 239.8 ohms a good result as again this is coil of K13 only. 4. From U1 pin 4 to K9 pin 10...result 480.6 ohms a good result reading coils from K13 and K9. 5. From U1 pin 4 to U1 pin 13...result 480.6 ohms a good result again reading both coils K13 and K9 Note C82, C57 and C208 are in this circuit but not as yet installed. Now I go from ground to Pin 4 and am reading in the Mega ohms. And no matter which ground point I go to I get the same high ohm reading. As for R1 and R2 1. On R1 going from bottom terminal (terminal above R2) to C1 top side and get reading of .02 ohms...this is good 2. From same position on R1 again to other side of C1 and get OL. 3. I then go from the same position on R1 again to ground and again get OL. Not sure where to go next Don. Mike VE3WDM -- View this message in context: http://elecraft.365791.n2.nabble.com/Resistance-checks-on-RF-board-page-38-tp7573563p7573597.html Sent from the Elecraft mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KPA500 - power out question
I have found that the KPA500 and KAT500 combination is outstanding. In fact one thing I noticed right away about the KAT500 is that when it is tuned correctly I can both see and hear the difference in RX signal strength in the headphones and on the P3 SVGA screen. My Alpha 87A and Palstar AT5K are both setting idle now until I begin to get serious about DXCC on 160m and 80m CW this fall. 73, Tom Amateur Radio Operator N5GE ARRL Lifetime Member QCWA Lifetime Member On Sun, 12 May 2013 20:42:39 +0100, Stephen Prior eastbrantw...@gmail.com wrote: Bill, I suspect it has more to do with the default reply nature of the group, in that replies are sent straight back to the originator of the message rather than to the group itself. It's not typical of the way that groups tend to be set up these days and so catches us all out from time to time! If I may add my indirect experience of the KPA500 in that a good friend of mine bought one, he too very quickly followed up with an order for the KAT500 and is, I believe, very happy with its performance. 73 Stephen G4SJP [snip] __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KX1 absolute Vmax ??
The user book says 14vdc... I have a reg. power supply that does,15.000 vdc. Is that going to be a problem? Phil Non judgement day is near On May 10, 2013, at 7:02 PM, Mike Weir ve3...@hotmail.com wrote: Good evening all, just making my way through the K2 build and had was wondering about some resistance check results. On R115 and U1 pins 4,9,10,28 I am getting readings in the range of 3.9 mega ohms to 5.4 mega ohms. The results sheet advise of results in and around 20k. In the past I have found that the measured amount was somewhat close to the expected manual. To me it just seems a bit high when you are to see greater than 20K and the measured amount is in the Mega ohmsis this normal?The last measurement question I have is for R1 and R2. I have to see 1mega ohm or more and my Fluke is just reading OLis this what I am looking for?The only normal reading in this check out to me is U1 pin 1 which comes in at 4.85K Thanks for your timeMikehttp://elecraftk2.blogspot.ca/ Exact readings I am gettingR115 9.57mega ohmsU1Pin 4 3.9 mega ohmsPin 94.8 Pin 10 4.7 Pin 28 5.4 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX1 absolute Vmax ??
Phil, Exceeding the specifications with any equipment is at your own peril with any equipment. Although I doubt that 15 volts will cause a problem with the KX1, the regulators will generate more heat than the design point predicts - and there may be other consequences. A few diodes in the power cable for that power source will drop the voltage down, or choose another supply. Some power supplies can be adjusted for output voltage, but I suspect you have a sealed power supply that was intended for a computer, so do what you have to to remain is spec. 73, Don W3FPR On 5/12/2013 7:24 PM, Philip Townsend Lontz wrote: The user book says 14vdc... I have a reg. power supply that does,15.000 vdc. Is that going to be a problem? Phil Non judgement day is near __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX1 absolute Vmax ??
Thank you Don... Non judgement day is near On May 12, 2013, at 5:41 PM, Don Wilhelm w3...@embarqmail.com wrote: Phil, Exceeding the specifications with any equipment is at your own peril with any equipment. Although I doubt that 15 volts will cause a problem with the KX1, the regulators will generate more heat than the design point predicts - and there may be other consequences. A few diodes in the power cable for that power source will drop the voltage down, or choose another supply. Some power supplies can be adjusted for output voltage, but I suspect you have a sealed power supply that was intended for a computer, so do what you have to to remain is spec. 73, Don W3FPR On 5/12/2013 7:24 PM, Philip Townsend Lontz wrote: The user book says 14vdc... I have a reg. power supply that does,15.000 vdc. Is that going to be a problem? Phil Non judgement day is near __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] KX1 absolute Vmax ??
The PS in question is a regulated ps from an AOR 7030 receiver. It's got a bit of ripple as well. Non adjustable but I may Change that. I don't want to stress the regulators in the KX1... So maybe another supply is in order... Might be easier. Non judgement day is near On May 12, 2013, at 5:44 PM, Philip Townsend Lontz phi...@mac.com wrote: Thank you Don... Non judgement day is near On May 12, 2013, at 5:41 PM, Don Wilhelm w3...@embarqmail.com wrote: Phil, Exceeding the specifications with any equipment is at your own peril with any equipment. Although I doubt that 15 volts will cause a problem with the KX1, the regulators will generate more heat than the design point predicts - and there may be other consequences. A few diodes in the power cable for that power source will drop the voltage down, or choose another supply. Some power supplies can be adjusted for output voltage, but I suspect you have a sealed power supply that was intended for a computer, so do what you have to to remain is spec. 73, Don W3FPR On 5/12/2013 7:24 PM, Philip Townsend Lontz wrote: The user book says 14vdc... I have a reg. power supply that does,15.000 vdc. Is that going to be a problem? Phil Non judgement day is near __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] [K3] APF and Pitch
K3 users may wish to try my Macro's for using APF (CW Audio Peak Filter): APF ON Turns on APF, puts VFO in Fine tune mode (1 Hz resolution): IS ;SWH29;RT1;SWT53;RT0;RT1;SWT49;LK0; APF DN Turns on APF, puts VFO in Fine, turns on RIT and tunes down 20 Hz: IS ;SWH29;RT1;SWT53;RT0;RT1;RD;RD;SWT49;LK0; APF UP Turns on APF, puts VFO in Fine, turns on RIT and tunes up 20 Hz: IS ;SWH29;RT1;SWT53;RT0;RT1;RU;RU;SWT49;LK0; APF CLR Turns APF and RIT off, restores tuning resolution to 10 Hz: SWH29;SWT49;SWT53;RT0;IS ; Note: with APF DN and APF UP, the purpose of shifting the tuning frequency 20 Hz is to ensure the desired signal peaks at a pitch 20 Hz away from the ring frequency of the APF. You will have to make some careful adjustments of the APF shift control and the VFO frequency in order to peak the signal with these versions. 73, Chuck NI0C __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] KXV3A CAlibration Test
I installed the KXV3A feature and attempted to run the 1 Milliwatt Transmitter Gain Calibration Test. The test failed as follows Elecraft K3 Utility Version 1.12.12.17 OS Version 6.1 Build 7600 Windows 7/Windows Server 2008 R2 K3 MCU version 04.60. RS-232 speed 38400 bit/s. Starting 1 milliwatt calibration Calibrating at 1.900 MHz Calibration power settled at 0.27 MW; Elapsed time: 7 seconds Tx Gain calibration failed because transmit power did not reach the expected value I used a 1 KW Dummy load with RG 58 cable. Need suggestions to solution please. . 73, Ron, K5HM __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
