[Elecraft] K2 PLL reference oscillator range is zero -- problem SOLVED

else to happen), then measure the voltage at RF Board U5 pin 3 - if it is 5 volts, U5 is OK, get a new K2 firmware chip - but if the voltage is zero at U5 pin 3, replace U5. 73, Don W3FPR Back to your problem with the U5 output David Johnson wrote: Don and the group, I have

Re: [Elecraft] K2 PLL reference oscillator range is zero

, those signals (SCK and SDO) are working at their source so should be OK although there are also the RF Board to Control Board connections to consider as possible faults. 73, Don W3FPR David Johnson wrote: Don, Thanks for the quick response! I do have the 5 volts on pin 8 of U5

[Elecraft] K2 PLL reference oscillator range is zero

Hello and Happy New Year to everyone. I have owned K2 serial no. 3980 for about five years and it has worked flawlessly. A couple of days ago it stopped tuning properly. Instead of tuning across a signal, it now acts like a crystal controlled radio that tunes in discrete steps of

[Elecraft] K2 PLL reference oscillator range is zero

challenge is to find the source. 73, Don W3FPR David Johnson wrote: Hello and Happy New Year to everyone. I have owned K2 serial no. 3980 for about five years and it has worked flawlessly. A couple of days ago it stopped tuning properly. Instead of tuning across a signal, it now