Hi Gary, PLL linearization is completed in this morning after removing and re-soldering PLL reference oscillator temperature compensation PCB and U4.
When I do the PLL range test pressing BAND- then BAND+ the voltage at pin 1 of U6 were 5.1mV and 7.67V (OK). RFC15 show 8.2 Ohms of resistance which is (OK). Pin 16 of U4 is 4.95V (OK). VFO works on all bands and passes the VCO voltage tests on R30 at the min and max frequencies shown in the manual. CAL PLL worked with the counter probe inserted in TP1. T5 is OK I adjust L34 selecting CW mod and FL4 with the weak birdie near 7.0MHz. Voltage from U5 outpin pin 7 change slowly when I tuned the VFO (OK). I have checked SCK, SDO and DAC2CS connections which are OK. It seams that everything are OK know. I have three other questions at this moment: 1) Receiver works but the signals are very weak. XG1 1uV and 50uV signal heard but S-Meter did not show S9 in 50uV. S-meter calibration done before. When I connect N-gen no noise heard. Is this normal at this step. 2) I red 3.75 volt on U10 pin 14 and pin 1 of RP6. Is this OK. 3) Where I have keep P7 jumper on INT or EXT? I think I can start assembly, Part II. Thank Gary, Wayne for your immediate respons. 73' Ruchan Ozatay, TA2AH _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net http://mailman.qth.net/mailman/listinfo/elecraft You must subscribe to post. Subscriber Info (Addr. Change, Unsub etc): http://mailman.qth.net/subscribers.htm Elecraft page: http://www.elecraft.com
