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RE: Thoughts on Input resistor?

Yes, the relatively broad area in a DH tube where grid current starts to get underway is a decent reason to use a grid choke.

The use of large resistors for contact bias, IMO proves that a wee bit of grid current flows in even liddle, low current applications. Getting it out of the way is a good thing.

Either way, I don't find it troublesome on IDH power tubes, and I don't think I am hallucinating in thinking they sound better than a resistor.
cheers,
Douglas

Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.

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