[Elecraft] MH2 Microphone issue
I have a K2 with the SSB option installed and I am having issues getting the MH2 microphone to work. I am currently using a Heil Pro-Set with the K2 and everything is working fine. I have checked the back of the microphone connector and everything appears to be connected properly. The 5.6k resistor is installed between pins 1 and 6 and all of the jumpers are installed. The PTT button on the MH2 works but my voice is not heard on a separate receiver. According to my manual I should be able to use the same microphone settings for the Mh2 and pro-set. Can someone help me out? -- View this message in context: http://elecraft.365791.n2.nabble.com/MH2-Microphone-issue-tp6064358p6064358.html Sent from the [K2] 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] MH2 Microphone issue
All of the jumpers are installed. I measured the voltage on pins 1 and 6 and the voltage is approximately 3.1 vdc. I can still use the K2 with the Pro-Set and it works fine. The MH2 does not work even though the KSB2 manual says the configuration is the same. -- View this message in context: http://elecraft.365791.n2.nabble.com/MH2-Microphone-issue-tp6064358p6064593.html Sent from the [K2] 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] MH2 Microphone issue
The 5v regulator U5 on the control board has an output of 3.0v. I disconnected the front panel from the control panel and the output is still around 3.0v. Do you think the lower voltage could affect the operation of the microphone? I also noticed there is an update to grounding the microphone jack. Could the lack of ground some how cause this? -- View this message in context: http://elecraft.365791.n2.nabble.com/MH2-Microphone-issue-tp6064358p6064638.html Sent from the [K2] 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] MH2 Microphone issue
I replaced the 5v regulator and the 5v line is now reading 5vdc. The MH2 still does not work. I also plugged in the Pro-Set and the pro-set works fine. Do you think the microphone could be broken? I have never used it before so I am not sure it works. -- View this message in context: http://elecraft.365791.n2.nabble.com/MH2-Microphone-issue-tp6064358p6065062.html Sent from the [K2] 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] MH2 Microphone issue
I bought it directly from Elecraft. -- View this message in context: http://elecraft.365791.n2.nabble.com/MH2-Microphone-issue-tp6064358p6065182.html Sent from the [K2] 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] K2 SSB Receive issue
The USB and LSB BFO for each filter was almost identical to each other. I used the BFO numbers in the K2 SSB manual as a starting point and used spectrogram to fine tune the filters. I am now able to receive readable SSB on all bands. I knew it was something I overlooked. Thank you for your help. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5929306.html Sent from the [K2] 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] K2 SSB Receive issue
I recently finished aligning my K2 with the spectrogram software and with the procedures from Elecraft. I am able to receive SSB on all bands except on 21m and 12m. The SSB signal is very distorted and sounds like the filter is not wide enough to receive the SSB signal. I completed all of the alignments in the manual without any issues. I know I must have missed something small but cannot figure it out. Before I start to adjust anything on the K2, does anyone have any suggestions? -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925220.html Sent from the [K2] 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] K2 SSB Receive issue
I am sorry I should have mentioned I have the KSB2 SSB board installed. I followed the K2 Dial calibration procedures on your website to verify everything is aligned properly and it is. I checked for SSB reception on 21m and 12m and the SSB audio is still distorted. All other bands work below 21m. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925439.html Sent from the [K2] 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] K2 SSB Receive issue
I shouldn't have used the word distortion. The SSB stations are completely unreadable, very similar to a narrow filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925482.html Sent from the [K2] 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] K2 SSB Receive issue
I used my K3 to transmit a USB/LSB on all bands except for 10m. The only two bands that I could receive a readable SSB signal was on 20m and 17m. I tried USB and LSB on all other bands and could not receive a readable signal. I used my S-Meter to adjust the frequency on the signal in which I did not have a readable signal and the peak of the signal on the K2 was about 2.2 khz below the indicated frequency on the K3. I adjusted and verified the K2 is on frequency using WWV prior to performing this test so I know both the K2 and K3 are on frequency. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925735.html Sent from the [K2] 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] VCO control voltage range
I am trying to adjust the VCO control voltage on the RF board and having an issue. When the VFO is set to 3500 khz the voltage is around 1.5vdc but the voltage goes above 7.5vdc around 4500khz. I checked c71-c74, and d21-d26 and all are the correct parts. I checked T5 for the proper number of turns, 16 red and 4 green and the windings soldered to the correct hole. The book states I need 16 turns red and 4 green but figures 6-16 and 6-17 both have 14 turns red and 4 green. Which is correct? Is there anything else I can check? -- View this message in context: http://elecraft.365791.n2.nabble.com/VCO-control-voltage-range-tp5498514p5498514.html Sent from the [K2] 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] K2 Initial Power up
I inspected all of my solder joints and found a few pins that did not have proper wetting. The solder was not touching the pin. I was using a different type of solder and wanted to try it on the K2. I ended up removing all of the solder from the pins without proper wetting and used no-clean solder that I normally use. Now the joints look perfect. I have always used no-clean solder without any flux at a temp of 650f and I have never had a problem before. I guess that's what I get for using something new. I did get an info 80 error code when I switched to the 15m band. I turned the power off several times to try to repeat the error but could not repeat the code. I followed the troubleshooting procedures in the book for the info 80 code and all of the signals checked out fine. What is your opinion on info 80 showing up once? -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Initial-Power-up-tp5430109p5436026.html Sent from the [K2] 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] K2 Initial Power up
I bellowed all of the solder joints and it works now. I did get info 80 error code when I switched the band to 80m. I turned the power off and the code went away. I cannot get the error code to repeat. I followed the troubleshooting procedures in the book and everything looks good. Do you think i should check anything else? Nate - Reply message - From: Don Wilhelm-4 [via Elecraft] ml-node+5432415-2011902895-246...@n2.nabble.com Date: Tue, Aug 17, 2010 11:21 am Subject: K2 Initial Power up To: KA1YMX natesm...@hotmail.com Nate, I cannot say whether that would help or not - while it is possible that it would work, if it does not work with the external oscillator, then you have not discovered much of anything. There are several possibilities. First is that you just may not be hearing the 4 MHz oscillator. Even if the 4 MHz oscillator does not start, you will still see the K2 try to power on - yes, it will not be successful, but at least you should detect a blink. Substitution is the quickest way to localize a problem. Do you have any other K2 owners around? If so, perhaps they would let you temporarily swap their Control Board for theirs. If it works, you know that the problem is on your Control Board. Next step would be to put their firmware chip on your Control Board. If yours works, then you will know that the firmware chip has been damaged. Use good anti-static measures when changing out a firmware chip, they can be damaged by mishandling. I would rather see you checking the components in you 4 MHz crystal area, C21, C22 and X2 for proper values and good soldering. While anything can be faulty, the chance that the crystal is bad is small. 73, Don W3FPR dogbulter wrote: Since I cannot detect the 4mhz oscillator at the MCU (U6), I was wondering if I could use an external clock to make sure everything else is working. I would use a Pongrance Digital VFO to inject a 4mhz signal into pin 14 (OSC1) and remove C21, C22, and X2. If this works I could at least determine something is wrong with the oscillator section. Please let me know what you think. Nate __ 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 __ View message @ http://elecraft.365791.n2.nabble.com/K2-Initial-Power-up-tp5430109p5432415.html To unsubscribe from Re: K2 Initial Power up, click http://elecraft.365791.n2.nabble.com/template/NodeServlet.jtp?tpl=unsubscribe_by_codenode=5432099code=bmF0ZXNtYWxsQGhvdG1haWwuY29tfDU0MzIwOTl8LTgxODgyNTQ3MA== -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Initial-Power-up-tp5430109p5434473.html Sent from the [K2] 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
