Follow up to EH16 Second Delay Repair

[Grant Richter]

The problem was the EH16 still showed 60Hz distortion
after replacement of all supply electrolytics.

After I found this beauty of a page
http://people.ne.mediaone.net/sellon/EH16Secpage.htm
thru Loopers Delight the answer became obvious.

The primary power supply transform is equipped with
two input taps, what appears to be 130VAC and 100VAC.
Moving the AC line to the 100VAC input tap provides
enough supply overhead to eliminate the 60Hz intermodulation
distortion.