Which resistors to use for KT88 output tubes

Wont metal film work just as well on the grids?

Thanks Rodman. I read it again and saw the reference to wirewound resistors.

Based on the schematic of my KT88 amp, I see a 2.2 kohm 2 watt resistor to the control grid, a 100 ohm 5 watt resistor to the screen grid, and 10 ohm 5 watt plate resistor.

Obviously, the 10 ohm resistor should be a wirewound resistor. It will probably also be noninductive as well.

The control grid resistor should be a noninductive wirewound too.

It is the screen grid resistor that should be carbon comp because of its low inductance? Why can't I used a non-inductive wirewound resistor here?

PRC makes very high quality precision wirewound non-inductive power resistors.
http://www.precisionresistor.com/files/PDF/Precision-Power-SM-Series-Wire-Wound-Precision-Resistor.pdf

After noticing Caddock 1W MM215 resistors in some top commercial audio gear, I intend to try this non-inductive model singly and in parallel in a future upgrade. Has anyone here experienced these or perhaps the MS or MV series? Caddock factory direct will build these in custom values.

Mills makes some nice, non-inductive wirewounds and what I would probably choose for the screen grid: (http://www.hndme.com/productcart/pc/viewCategories.asp?idCategory=54) I wouldn't use carbon comps anywhere in an amp, that I didn't want to exhibit colorations/noise(ie: audio reproduction). I've also purchased a number of Metal Films here(see pages 10-12): (http://www.percyaudio.com/Catalog.pdf) Michael used to have a $50 minimum. Don't know if that still applies, but- if you're building an amp; you should surely be able to find enough goodies, in his catalog, to make that up. He will also match components(ie: for channel balance), to <1%, for a small fee.

Thanks, Rodman. I Mills and PRC power resistors seem to be perfect for the job.