RD100 Tube subs.Hum, Metal Knob Inserts

Hi Steve
Great site!!!
Just bought a RD100,near pristine ,and it does'nt seem to have been used a lot it gets all the superlatives, thought I'd better get a spare set of Tubes. It's got Sylvania 6L6's in it (original s?) and the sound makes me smile every time I turn it on .Any tube suggestions??? bearing in mind I want to retain the Sound that I'm getting.A little more sparkle maybe?
Also how quiet are these amps?Cuz I'm getting some Hum when I turn up the Drive but I suspect that's normal.I use a mainly,a'68 Fender Strat & Gibson LP Dlx and there's no change in hum with either,without the Drive it's pretty quiet.
Last one ,three of the knob inserts came loose during transportation,I found 2 of them in and would like to know what adhesive (alu&plas?) to use to stick em back,looks kinda ugly without em, bit like missing teeth!
Thanks for your help

Yeah....One of the best tubes on the market (modled after GE's 6L6) is the SED Flying "C" 6L6GC for tone and low microphonics... TubeDepot sells them... Bias the amp afterwards if you can or look for red plate glow, if you see no red plate glow in the dark, then youll be ok ...as long as you like the sound...Bill

The knob inserts need to be glued in with an adhesive designed for attaching dis-similar materials, such as Epoxy or RTV Silicone Sealant. A litte dab of RTV (aka "Bathroom Caulk") will not only fix the problem, it will be more resistant to shock and vibration than Epoxy will be under some circumstances. It would better to use the black color rather than white (in case you use too much and it oozes out) but if you use just a tiny bit and do it right you'll never see it.
If you are missing inserts and want to camoflauge that fact, go to a hobby shop and get some "Aluminum" hobby paint and a brush to create that same look. A "false" tooth is better than a hole!
As far as tubes go, there are a lot of opinions. Read some of the postings here for first-hand observations from people who have tried them. Not everyone will agree on tone quality, but everyone will agree you need to bias the amp properly for your chosen tubes and buy QUALITY tubes that are guaranteed to withstand the high plate voltage that Music Man amps use (700Vdc).
Picking a tube dealer is at least as important as picking the tube. Knowledgeable dealers can steer you to the best choices for these amps.
Steve

Thanks Man!I appreciate your prompt reply.
Niall