Since operating the receiver I am of the opinion that a filament rheostat in each of the valve's filament circuits would be the better way to go. I followed the published recommendation and just used one for the RF stage and another for the detector and AF stages. I called these RF and AF gain but better performance would certainly result if each stage could be adjusted separately. It would make the operation rather daunting for anyone not technically minded but once adjusted usually the RF and output rheostats would be the only ones to alter. This is one item that is not really 'old'.
Correct neutralisation makes a world of difference.
The regeneration can be advanced too far and all you get is a 'click' and reduced volume, plus a little distortion. At optimum feedback the sensitivity and selectivity are excellent. In fact selectivity is better than some older superhets I have restored. The stations in my area are very closely spaced for an old receiver. Cabinet This is my p ice de r sistance .