[Elecraft] [K2 4922] IF Amplifier Alignment

[Don Wilhelm]

Ron,

Peak the IF amp inductor (L34) either by ear or by connecting an audio 
voltmeter (or DVM in AC mode) to the speaker connection (RF Board P5) to 
detect the maximum signal.

Attempting to use the S-meter at this stage is not reliable.

In any case, the peak is very broad.  If you cannot discern a peak, set 
the slug 1 turn from the top of the can.

You can (and should) re-adjust the S-meter menu settings CAL S Lo and 
CAL S Hi after you complete all other assembly and test items.

73,
Don W3FPR

Ron Hahn (EI2JP) wrote:

> I've moved on from the BFO issue (now resolved) to an IF alignment issue.
> 
> My problem is a constant S3 reading on the S-meter.
> 
> RF gain control works and is all the way turned up.  Birdie at
> 6.999.17MHz is clearly readable but is only strong enough to push the
> S-meter up from S3 to S5.  When I move off the birdie frequency I hear
> nothing on the headphones.
> 
> Mode:    CW
> Filter:  FL2
> RF gain: full
> AF gain: 12 o'clock
> Preamp:  on
> 
> The S-meter increases as the RF gain is decreased (as expected).
> 
> As the constant reading masks the S-meter reading it is hard to peak
> the IF inductor L34 for maximum signal.
>