[Elecraft] Trouble Again!

Sat May 17 17:27:01 2003

I had this problem a couple weeks after succesfully building my K2 #3421. I
can't really explain what happen except to tell you what I did.

I reheated all of the solder connections for the componenets built around the
PLL oscillator circuit (including the PLL chip and X1). My receiver was still
'dead', until I took an MFJ-259B and ran it's output (inductively coupled) into
the input of the PLL (trying to simulate the 12MHz signal the crystal
oscillator was supposed to be producing). When I did that, I could start to
hear signals on the band (my radio PLL was also producing 400 kHz output as
measured on the display), and when I pulled the 12MHz signal out of circuit,
the whole thing was working fine. I haven't had a problem since (and hopefully
won't have any...)

I can't explain why the reheating of the joints didn't correct it immediately.
I can't explain why inserting a signal into the PLL jumpstarted the crystal
oscillator.

I just know that it works now.

72,
Daniel/AA0NI
--- Jerry Felts <[email protected]> wrote:
> I'm having the worse luck with radios the past couple of weeks. The rig I
> was using died, so I'm more determined to finish my K2 and get it going. Ok
> here is the story.
> 
> I'm on Page 57 in the manual, just starting the Alignment and testing for
> part 2. This is where you hook up the Freq Counter Probe and check the
> Oscillator. When you start up your suppose to see something like 12090khz,
> hmm I'm not even close I get 440. xx all the way up to something like 445.xx
> but its changing so fast its next to impossible to read.
> 
> Don't really see anything that tells me what to do, oh it does say if it
> changes rapidly you possibly have a problem, duh, ya think?
> 
> I called Elecraft and left a message, they are all at Dayton having fun I
> guess! Anyway thought I'd see if anyone was home on the list and could offer
> me some sugguestions? Want a partly built K2?
> 
> Jerry - NR5A
> 
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