06-01-2017, 06:06 PM
One thing that has become apparent is a little distortion on the Gram input. I put this down to using a Vari Mu valve and wrong bias. So I have now substituted an EF91, added a 1K UN-bypassed resistor the cathode, connected the grid 1 directly to the volume control, there is now no AGC volts fed to the grid. This has cured the distortion on Gram and overall the set sounds even nicer.
All will be refitted into the cabinet over the weekend and the job will be signed off.
All will be refitted into the cabinet over the weekend and the job will be signed off.
