[Elecraft] K2 #7340 PreAmp Problem

[Ray Spreadbury]

Hi All

 

I have been building this K2 taking my time and I thought I was soldering
carefully.

All has gone well so far and I have got as far as the IF amplifier alignment
having completed VFO linearization etc with no problems and all readings
within spec. I followed the instructions for the IF alignment including
putting the PreAmp on but I could not hear the internally generated signal
at 7000kHz and there was only a very low audio output. 

With the PreAmp off (or even with the ATT on!) the audio is much louder and
I can then hear that signal and so I adjusted the slug in L34 for best
signal strength with low noise. I then carried out the 40 meter band pass
filter alignment with no problem so I am about to start the next phase -
Assembly, Part111.

 

Clearly there is something wrong with my PreAmp on 40 meters however. Does
anyone have any ideas of what I should look at or check?

 

Happy Christmas everyone!

 

73 Ray, G3XLG