Re: [Elecraft] K2 Audio Level using filters
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Re: [Elecraft] K2 Audio Level using filters
Hi Don, Just wanted to let you know that I fixed the problem. I re-soldered all the switching diodes and also found a very small piece of clipping sticking to the back side of the board. Don't know if it was the clipping or the re-soldering but working perfectly now. Thanks for all the help. Earl VE7Qj -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Monday, April 16, 2012 10:18 PM To: Earl Richardet Cc: Elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 Audio Level using filters Earl, It does sound like you have a problem with the filter switching diode matrix on the KSB2 board. If your signal level is decreased from the level obtained when the KSB2 is bypassed ( jumper between pins 1 and 3 of both J9 and J10). then you have a problem with the KSB2 board. Make certainly all the diodes are correctly oriented, and re-flow the soldering in the OP1 filter end of the board. If you are relying on the BFO frequency settings listed in the KSB2 manual, be advised that there is a better way -- go to my webpage www.w3fpr.com article on K2 Dial Calibration and go to page 3 which deals with the filter settings. Use Spectrogram to give you a visual indication of the filter placement. Note that recent K2s will have wide filter widths that are much wider than indicated i\on the K2 display -- use Spectrogram to indicate the actual filter width. Spectrogram version 5.17 and Spectrogram version 16 may be downloaded from my website, Both have been seving my needs for a long time and should be free of problems (there have been reports of bad downloads of version 16). 73, Don W3FPR On 4/16/2012 10:28 PM, Earl Richardet wrote: Hello to the Reflector, I've recently completed building my Elecraft K2 transceiver and I have one problem that I would like to resolve. Up to the point where I installed the SSB kit into the radio, the audio level on each of the filter selections was strong and working fine. After I installed the SSB kit, the audio level on the CQ filters dropped off significantly. The OP1 SSB filters are working great and have strong audio output, but as soon as I select FL3 or FL4 the audio drops way off. Otherwise the SSB board is working fine and I great audio reports from other stations on my transmit audio. At this point I have confirmed all the components on the SSB, no bridges or splatter that I can see. Everything appears to be ok. Don't know where to start troubleshooting this issue. Appreciate any suggestions on troubleshooting or if anyone has experienced this themselves and of course what you did to resolve. Thanks and Regards, Earl VE7QJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 Audio Level using filters
Hello to the Reflector, I've recently completed building my Elecraft K2 transceiver and I have one problem that I would like to resolve. Up to the point where I installed the SSB kit into the radio, the audio level on each of the filter selections was strong and working fine. After I installed the SSB kit, the audio level on the CQ filters dropped off significantly. The OP1 SSB filters are working great and have strong audio output, but as soon as I select FL3 or FL4 the audio drops way off. Otherwise the SSB board is working fine and I great audio reports from other stations on my transmit audio. At this point I have confirmed all the components on the SSB, no bridges or splatter that I can see. Everything appears to be ok. Don't know where to start troubleshooting this issue. Appreciate any suggestions on troubleshooting or if anyone has experienced this themselves and of course what you did to resolve. Thanks and Regards, Earl VE7QJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 Internal ATU calibration issue
I've just completed the build on my internal K2 ATU. I'm at the point of performing the CALn Bridge Null Adjustment. Following the procedures I am unable to get any result other than HI unless I turn the power practically down to zero. Turning the power to zero I can get a reading close to 020. However changing C55 doesn't lower or raise the indication. I don't think that the circuit is working as intended. The voltage on pin 1 of U4 is approx. 4.5 volts. With R6 removed. I've looked over the components a number of times. I've confirmed that all the components in the circuit are the correct values, correctly soldered and in the correct orientation. Including L1. Suggestions? __ 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] Thank You Elecraft
Thanks to Elecraft for providing 50 to 60 hours of great fun and entertainment with some trepidation while building my new K2 transceiver. Everything went well in the first phase of the build, only to be challenged with a few issues in phase II. After about 5 hours of troubleshooting with the help of Don Wilhem, I got the receiver functioning. Phase III was completed today without issue and the transmitter worked as advertised from the moment I turned the transceiver back on. All that was left was to align and calibrate and a few hours later, the basic transceiver was complete. Thanks also goes out Mychael Morohovich, the Tyroidguy for the pre-assembled toroids. I think that buying pre-built toroids really made the whole process a lot easier. So now I'm off to build the options and get them into the radio. What Great Fun and what a great radio. Thanks again!!! 73 de VE7QJ __ 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] Order of Options to build
I have the following options to build for my new K2 and I would be interested to know if there is a preferred order of build. The options are: KNB2 Noise Blanker KSB2 SSB Adapter KAT2 Auto Antenna Tuner KDSP2 DSP and Audio Filter, Clock Thanks, Earl VE7QJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K2 new build issue
Hello all, I'm in the process of building a K2 and have run into and unexpected result. I have just completed phase 2 of the build and I'm doing the testing and alignment. Specifically, I was performing the PLL Reference Oscillator Range Test. The following results are what I got. Ref.High Freq = 12091.16 Ref.Low Freq = 12086.74 Range = 4.42 The documentation says that the range isn't correct, should be between 9.8 and 15 khz. The doc says to go to troubleshooting, but doesn't really explain what could be wrong or where exactly to go in the trouble shooting. Can anyone guide me with I'm dealing with here. From a newbie and definitely not a radio expert. VE7QJ __ 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
