Are these resistors in the right place for these values:
From left to right: 2.7K, 1.5K, 1.5K, 2.7K

On the PCB they are between the preamp tube socket and the gain pot.

Thanks
Hank

Alan

Thanks for the image.  I checked the resistance on a multimeter before soldering them into place.  But on making a final check with those resistors in place, the readings were different than specified.

A quick check with Steve reminded me those resistors were wired in parallel and would not give rated values.

When all else fails....check the schematic!  

Hank