[Elecraft] K2, S/N6780, Receiver Pre-Alignment Question
Should I be able to use the Elecraft N-Gen or XG2 signal generator to do my pre-alignment steps on page 79. I have no RF generator with me here as I winter in Sebring, FL, trying to build and finish my K2. I can get the 10meg output from my Heath frequency counter to come thru and adjust L8 and L9 for max signal strength. Also while tuning across the dial I get at one point, voices in Spanish so I have to assume the radio is somewhat working. This is with a two foot shielded rf cable connected between the antenna input and the freq counter. If the N-Gen or XG2 set a 50 micro volts is enough to do the peaking of the coils, what have I missed when trying to hear their input via headphones? The manual says that I should be able to use the N-Gen. Alan Latz KA9UCP __ 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 Phase One Alignment Problem
I need help with the 1st phase of alignment on a K2, s/n 6780. Everything works perfectly with the exception of the Setting of the AGC Threshold voltage on U2, pin 5. I can only get a voltage of 3.62 volts with the R1 trimmer cap turned to it's max ccw. The manual calls for 3.8 volts and I assume with the trimmer set less than full ccw. With a regulated power supply set at 12.51v, I get 12.33 going into 8v regulator and 7.59 coming out. Both oscillators are running as shown by Heatkit IM-2420 digital freq ctr. X1 at 5.086 ant X2 at 3999.99. U2 Pin voltage follows:1 @3.1, 2 @3.1, 3 @ 3.1, 4 @ 0.0, 5 @ 3.62, 5 @ 3.62, 6 @ 3.62, 7 @ 3.62 and 8 @ 7.59. Perhaps this is not a problem. With all the K2's built, I wonder If I'm the only one to encounter this problem. I have examined all solder joints and redone any that were not good and bright. I find no improper installed items. I checked the trimmer R1 and it operates within it's range of 5.1K ohms. I'm going to search for a "return to factory default" input in case I have screwed up the controller with some wierd setting. I have a Hayko 808 on order so I have no capability of desoldering any componets at this point. Thanks for any sugestions ahead of time. Alan Latz KA9UCP __ 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] elecraft-requ...@mailman.qth.net:
elecraft-requ...@mailman.qth.net: >From Alan Latz KA9UCP alanl...@gmail.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
