Well,it sure won't hurt! Thanks for the info on the knobs.

Hi everyone,new here,and new to amps. I have some really simple questions that I'm sure everyone will laugh at,but I'm used to being laughed at,so here goes......

I've got an old Gibson G30 amp that I've had about 25 years.I think it's quite a bit older than that,but I don't know for sure.I played it a few times back in the day(with a borrowed guitar),but it's been stored rough ever since.It seems to be in fairly decent shape,except most of the knobs are missing.

I know squat about amps,I've always played accoustic(Poorly.I've been a beginner for 35 years  ).Soooo....I need some help with what all these controls,and so forth,actually do.

I should mention here that I have my very first ever electric guitar on order,a gold top Les Paul wannabe,but I haven't got it yet,so I haven't had a chance to experiment.

First,I guess,where can I get replacement knobs? I see Fender ones all over Ebay,but no Gibson ones.Will Fender knobs fit?

Second,there are two inputs on the front,"low" and "high" What does that mean?

Third,there's an input on the back for a foot switch.What in blazes can I switch with it?

Fourth(and I don't have the amp here,so I'm doing this by memory),there are a couple of tone and volume pots,plus a reverb pot,and these are self explanatory,but there are a couple of others over toward the right,one says "speed". I can't remember what the other says.What do these things do? Is it tremolo?

Thanks for your patience with a rank beginner.And,thanks in advance for any help/advise you can give me.

Err....Except,maybe,chuck it all,and buy a Twin Reverb.That'll have to wait until I relearn that pentatonic scale again.Let's see...That's the fifth fret on the third string....No,wait..Ahh....  

Cheers!
BR