Viking II modifications

[N6YW]

I am now on the air with the Vike.
It plays pretty well considering I haven't done all that has been laid before me.
I am now noticing a popping noise "On Air" that sounds like it may be the big space heater in the screen supply.
So, it begs to ask the question where can I find the mod for doing a real smart method of doing this?
I suppose a separate transformer and filter could be used but...
The keep alive negative peak diode mod beckons as well.
So, just point me to the proper URL and I can go from there.
Thanks in advance.