Odd problem with Bush AC11, got me thinking.

[pwdrive]

Thanks for that Lawrence, it sounds about right.

I was measuring at the hot end of the output transformer which is the reservoir cap connection, the HT rail after the smoother is only 67 volts, the smoother is a hefty 10K. So the drop with the AGC at maximum seems about right.
I wonder why I have never noticed this before?

The difference on tuning after repair was remarkable, like tuning in radio 4 after short wave! It was so sharp before and hard to achieve a mid point on the station.

The Trader sheet gives the HT at the filter capacitor as 120 volts with no signal input, based on that your 67 volts seems low for whatever reason.

Lawrence.