[Elecraft] K2 SSB audio - fuzzy around the edges
I have a K2, mid 5000 serial number, mic input wired for Kenwood, 50 amp 12 volt Amidon power supply, with a KPA100 running 100 watts. I can easily switch my HM-10 mic between transceivers using seperate audio cables for each radio to perform on air testing. When using a Heil microphone HM-10 with dual element (HC-4 or HC-5) with Heil shielded cable and mic plug wired for Kenwood and no external pre-amp for the K2, audio setting SSBA is at 2, and compression setting SSBC is at 2-1, and asking other hams for a critical audio report I am being told that I sound a little fuzzy around the edges on the K2. I am using an Amidon type #43 toroid with seven turns of mic cable just before the mic input to the K2. Any extra Heil mic cable is coiled up as common mode choke about 5 inches in diameter. The distortion might be a little more with the wider HC-5 element. The HM-10 mic works fine and gets great audio reports on a Yaesu FT-1000D - same antennae and same power levels. Only when asking for an audio report does the "little distortion" report come up. I have also applied the grounded K2 mic connector mod. Is this as good as it gets with the K2 audio ? Am I asking for too much for Heil HM-10 with the K2 to sound like the Yaesu FT-1000D ? Does audio compression in the KSSB create a little distortion in the audio ? Thanks Joe - K9DMV __ 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] Is this correct ???
My K2 #5628 has the SSB option installed. Fine carrier balanced completed. Many contacts made on SSB with the K2 with good audio reports. No carrier can be heard and audio sounds good. The following settings were done: power set to minimum - ccw, mic gain (SSBA) set to 3, speech compressor level (SSBC) set to 3-1, frequency counter plugged into TP2. While doing the SSB transmit BFO optimization in CAL FIL BF1 (first filter) with BF1 set to OP1, I CAN HEAR my audio in my headphones "IF" I key the microphone. If I move the BFO plus or minus from suggested settings I can hear my audio frequencies change. So I set it for the "best sounding" which were very close to the recommended settings. The SSB adapter manual says that you must use an external receiver or ask a nearby ham to make these adjustments. I was able to this just by listening in the headphones plugged into the K2. This method is NOT mentioned in the manual. Can the SSB Transmit BFO Optimization (page 22 SSB manual) be performed this way or is my radio doing something unique?? Best, Joe Szczubelek - K9DMV #5628 Need Mail bonding? Go to the Yahoo! Mail Q&A for great tips from Yahoo! Answers users. http://answers.yahoo.com/dir/?link=list&sid=396546091 ___ 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] Need time and freq for Elecradt CW net
I need the correct day, start time in GMT, and frequencies for the 40 and 20 meter Elecraft net. Reading the emails the frequencies appear to be 7045 and 14050 kc. It appears that this is a Sunday nite activity for North America. Does this net meet more than once a week ? Best, Joe - K9DMV# 5628 __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.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] K2 #5628 is alive
My K2 ser. # 5628 is alive. Over the past week I have made several contacts on 80 meters. I have checked into the regional 80 meter Texas Panhandle SSB net several times using CW and received many FB reports. On 80 meters I get 17+ watts out and on 10 meters I get 12+ watts out. The receiver sounds good. Will be starting the KSB2 shortly. Best, Joe Szczubelek - K9DMV Need a quick answer? Get one in minutes from people who know. Ask your question on www.Answers.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] K2 Problem 12 Watts Out With Power Control Fully CCW - solved
With a few helpfull tips from Don Wilhelm - W3FPR I was able to quickly resolve my K2 power output problem. The voltage measured at diode D9 cathode (marked end) on the RF board was 2.30 volts DC. After R66 (2.7K) it was 0.0 volts. The microprocessor was NOT getting the RF output signal via VRFDET. The interal RF output meter was not indicating any output power. During the build I installed the RG174 coax at signal "RF" for the K60XV Rework Eliminator. When soldering the braid on the other end to L4 the center conductor shorted to the braid grounding the signal from D9 - operator error. Correcting that problem I now get 10 watts out at 2.1 amps on 40 meters with the power control set to 10 watts. The power control changes the output power. The internal RF output meter now displays output power correctly. I am now proceeding to complete the Part III test. Best, Joe Szczubelek - K9DMV --- Don Wilhelm <[EMAIL PROTECTED]> wrote: > Joe, > > The initial problem to be solved is that there is no > indication of power > output being fed back to the K2 microprocessor. > > The most likely source is a bad solder connection > and the second most likely > is a misplaced component. > > Keep your testing periods short, ignore the high > current messages for now, > and proceed as follows: > Start your search at RF Board diode D9 - if all is > well at that point, there > will be a DC voltage during transmit periods - how > large it is depends on > the amount of RF output, for now just be certain you > have a good solid DC > voltage there - anything over a volt or so will > indicate that the RF Output > Detector is working. > > Next point is on the Control Board - the VFRDET > signal which appears at pin > 10 of P4 - the DC voltage during transmit should be > about the same as you > measured at the cathode of D9. > > Lastly, check the VRFDET signal at the > microprocessor - U6 pin 2. The > voltage should be about the same as at P4 pin 10 if > R12 is properly in > place. > > Let us know where the VRFDET signal path is broken. > > 73, > Don W3FPR > > > -Original Message- > > > > The build for K2 ser # 5628 has been going well > until > > I got to the "Alignment and Test Part III" 40 > meter > > transmitter alignment section. > > > > Problem: > > > > With current set to 2.0 AMPS and the power control > > fully CCW I measured 7 watts on an external > wattmeter. > > The internal wattmeter had NO indication. When I > press > > the "tune" control with the display set for > voltage > > and current I see 13.3 volts and 1.88 amps. The > > current will start to slowly rise at .02 amps per > > second and will reach 2.00 amps in about 10 > seconds > > and the "HI CURRENT" message will appear with 7 > watts > > output. > > > > > -- > No virus found in this outgoing message. > Checked by AVG Free Edition. > Version: 7.5.430 / Virus Database: 268.15.6/567 - > Release Date: 12/4/2006 > 7:18 AM > > Any questions? Get answers on any topic at www.Answers.yahoo.com. Try it now. ___ 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 Problem 12 Watts Out With Power Control Fully CCW
The build for K2 ser # 5628 has been going well until I got to the "Alignment and Test Part III" 40 meter transmitter alignment section. Problem: With current set to 2.0 AMPS and the power control fully CCW I measured 7 watts on an external wattmeter. The internal wattmeter had NO indication. When I press the "tune" control with the display set for voltage and current I see 13.3 volts and 1.88 amps. The current will start to slowly rise at .02 amps per second and will reach 2.00 amps in about 10 seconds and the "HI CURRENT" message will appear with 7 watts output. If I set the power to .5 watts the current will start out at 1.98 amps and the 2.00 amp threshold and "HI CURRENT" message will appear much quicker - about 1 second. I still get 7 watts of output indicated on an external wattmeter. Setting the current to 3.00 amps and the power control fully CCW I get 12 watts out with 13.0 volts and the current starting at 2.84 amps creeping up at .02 amps per second. At around 10 seconds the HI CURRENT message will appear when 3.0 amps has been reached. Setting the power to .5 watts will cause the same thing to happen but HI CURRENT message appears quickly with 12 watts output. Additional Info: The K2 has passed all checks up to this point. I am using a Heathkit 50 ohm dummy load. Turning the power control up or down gives the indication of the desired power but has no effect. L1 and L2 gives a nice peak for 40 meters. They were very close if not right on from the 40 meter receiver test. Measuring the resistance at the collectors of finals Q7 and Q8 shows 3.7K for both transistors. The power output is being controlled by limiting the current not by the power control. The internal wattmeter gives no indication on transmit but works as an S meter on receive. I am using a 30 amp Ashton switching supply. It was Sunday evening so I called it a day. Best, Joe Szczubelek - K9DMV Have a burning question? Go to www.Answers.yahoo.com and get answers from real people who know. ___ 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
