fuses - the $39 ones or the 85 cent ones

Albert, I don't think your picking on me. I am just reporting to those out there my experiments, trials and results. I don't expect others to try what I have. Reading someone else's idea, experience or result may trigger an expansion of that idea or add a new direction and possible benefit. One expansion of discourse posted here is the possibility of controlled resonance of a vacuum tube filament within the confines of the glass. Tom

I've always wondered why the hi-end manufactures do not put these in right off the bat. Makes sense to me. Its one thing to let people buy the cabling they want but finish the job on the inside of the gear. Add the better fuses!

Dvrs -- some manufacturers are doing that -- such as Dan Wright of Modwright who posted some comments here.

Well- my guess would be many don't for the same reason the high-end tube gear manufacturers don't install NOS tubes. Too many consumers can be satisfied with newly manufactured Soviet or chinese tubes, and of course- the price of NOS tubes would be exorbitant. Better(and cheaper) to let the buyer sate his(or her) own tastes. Even these fuses(Hi-Fi Tuning, Isoclean, Furutech) each affect a system's sound in a different manner. Then again- I'm certain there are those that(like many in here) haven't tried them, and don't believe they offer any improvement.

I bought a modified Jolida JD-1000 that had the top level modification offered from Parts Connexion. I was surprised that for the price of the mod they were not included. I can see why NOS Tubes are not used though. Much more of an expense and the fact there is a rarity issue with most of them.

I would bet that if many more companies added them customers wouldn't bawk at having a Furutech over a Hi-Fi Tuning or an Isoclean. I think they would be fine with it.