[Elecraft] K2 IF Amp

[Don Wilhelm]

Peter,

The 1.4 volts at W2 is good, but you should have more signal out of the 
crystal filter (at W3).
Are you certain you peaked the signal in the filter by tuning the VFO?  
The tuning will be very sharp.
Re-flow the solder on the crystals, the varactors, RP4 and RP5.

Obtain the proper signal out of the filter before drawing any 
conclusions about the IF amp or any stages that follow.

73,
Don W3FPR

Peter wrote:
> Hi 
> I´m just doing receiver signal tracing using the Elecraft RF probe. Coming to measure signal at U12 there are 300mV at pin 4 but only 1 or 2 mV at pin 8 no change if I increase the generator input or RF gain to max. The same with U11 at pin 1, when I increase RF Gain I get n o more than 30mV at pin 5 of U11. Across the crystal filter I get only about 100 mV at W3 with 1,4 V at W2. Is that a matter of the filter circuit or the IF amp MC1350. Thanks for any help...
>
> 73
> Peter, DF8BB (K2 6437)
>   
>