it appears that might make sense for Sunn also. i was looking at a few schematics for Sunn and noticed a "Marshallesc" 10 Henry value on a 100 watt amp. in comparing the schematic to a Dynaco Mark3 which the Sunn 200S is based on, the Dynaco 60 watt amp originally carried a 4 Henry choke. Dynacos are known for having an overbuilt tranny set as well as Sunn. reading further i found an amp builder that makes a tube "Dynaco clone" ST120 that uses two 4 Henry chokes. it is a stereo amp but he states it is made to be able to bridge easily to use as a mono amp, which i assume would make it a basis for a nice instrument amp. the interesting thing about it is he states the two chokes allow an enormous amount of micro amps through, something on the order of 800ma. it is based on a Dynaco ST70 amp design and layout. it even uses a PA060 power amp which is called for in the original ST70 amp.
1) is that why i have heard (read) the expression that "Marshall watts are 'big' watts" plus probably the fact that Marshall might have under rated their amps like Sunn did?
2) it appears to document the Dynaco/Sunn big watts theory i am postulating and why they are so popular 50+ years after they were both designed. same same.
3) it also gives me the idea why some designs still carry a choke with their ability to use an octal socket for a solid state rectifier and always (usually!) state the voltage will vary when using a tube rectifier instead of a solid state one. the Weber 6S100 design would be a good example as it is in reality a redo of a Sunn schematic in my opinion. the name of it gives me that idea although not formally stated by Weber, or at least that i can find, i did find allusions to that fact in a popular forum.