[Elecraft] K2 5233 alignment problems
I hear that a third time is a charm. This is the third time trying to post and I hope it works. I am at the alignment section of phase III and everything seems to have gone hay-wire. Phases I and II went well with only a couple of glitches that were corrected with your help. I checked and repaired a few solder joints, looked for solder bridges and correct parts in the correct locations and fired up the unit. No smoke and no overheating. I set the power out at 2 watts, unit at 7100 and hit the button to adjust L1 and L2. I had .2-.3 watts indicated but they did not fluctuate when adjusting the pots. I checked the diode and resisters that they said were easily reversed and they were all ok. Using the rf probe I had no voltage at either side of r50. Further checks of components in the transmitter section found most of the U chips had improper voltages or double voltages at the appropriate pinsl I then went back to phase I and started running checks again. All was ok until I got to the tone generator and pitch. I now had neither!. The display showed the values I had after t he construction of that phase but now they are gone. When I hit the button to turn the tone on the audio went away. I did notice a very low click when I adjusted the vfo. I also went back to check the birdy at 7000 and found it to be very weak and totally disappeared when I moved the vfo dial. It came back when I hit the edit button but very shaky. Logic dictates the problem is in the construction phase of part III. The above is a short synopsis of the checks I did but I did not take the time to give the actual values of the U pin voltages at this time. I have tried to post twice before and want to verify this message goes thru before taking the time to enter the values. This leads to two questions 1)? Where do you suggest I start from here? 2)? Is there anywhere I can get a picture of the rf board before any parts are installed. That would be great for helping me locate any solder bridges on those small pads. Thanks in advance for your help. Dan af4lb __ 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] section II alignment pll problems
I have tried all tests and checks offered up by you good folks but none of them have cured my problem. I have even gone to a local ham buddy that has built one and we both could not find the cure. I have verified that all the parts are correct and in the right place. I have re-soldered all joints, those looking questionable or not. I also verified that the 12597.91 frequency displayed is in fact accurate.all voltages are correct, L31 is correct and capacitors c84 c85 are correct. When checking the cathode voltages on d16 d17 the voltage did come and go when hitting the band- and band + buttons. I noticed the voltage came and went on BOTH of the diodes simultaneously. Male?logic?kicked in and said is that right? If the two diodes are used to vary the frequencies to the display shouldn't they be activated one at a time, one with band+ and one with band-? Thanks in advance for your input. 73 Dan af4lb ___ 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 range test SN 05233
I am at the end of part II and have started my alignment procedures. When I got to CAL FCTR the frequency was 12597.91 with a little fluctuation in the .91? The next step was to the PLL reference oscillator range test. When pushing the Band+ or Band- I get no frequency change at all.? I performed the following voltage test with the rig set on 40 meters. U6??? lead 1?? 7.6 vdc U5?? Lead 1?? 4.9 vdc RP3?? Lead?? 1 7.6 vdc ?? 2?? 4.1 vdc??? 2?? 5.0 vdc2 4.1 vdc ???3???4.1 vdc??? 3?? 5.0 vdc??? 3 4.1 vdc ???4???0.0 vdc??? 4?? 4.9 vdc??? 4 0.0 vdc ?? 5?? 4.1 vdc??? 5???0.0 vdc??? 5 0.0 vdc ???6?? .67 vdc??? 6?? 2.0 vdc??? 6 4.2 vdc ?? 7?? 8.3 vdc??? 7?? 4.1 vdc??? 7 4.2 vdc ?? 8?? 8.3 vdc8?? 4.1 vdc8 8.3 vdc One thing I did notice that before I pushed any of the band buttons the bar graph was on +20. When I hit Band + or Band - the bar dropped down one led. I don't know if this indicates or points to the problem. I checked and rechecked my soldering and it looks ok. Any help on this will be greatly appreciated. 73 Dan af4lb ___ 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 mics
Thanks for all the input about alternate mics for my k2. I'll let you know the outcome. Dan af4lb ___ 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] hand mic for the K2
I am at the stage in my k2 building experience where I need to configure the mic jack in the rig. I want to keep the rig all Elecraft but unless I read the web site wrong, Elecraft no longer offer the one listed in the accessory page of the building manual. Does anyone have any suggestions or experience with the other mics they show that can be configured for use? Any input will be greatly appreciated. Dan af4lb (previously kf4pob) ___ 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
