reverb transformer question

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dscottguitars

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Joined 2011
#1
I need a small reverb pan and the only reasonably priced one I find is a 10 ohm input. I was going to use an 8 ohm transformer but I'm not 100% sure it is okay before I do it.

Also, with higher input impedances on the tanks, 600-2500 ohms, how much room is there for mis-matching? If any... With these, can you go straight from the tube?

Thanks, Daniel
 
#4
dscottguitars said:
Also, with higher input impedances on the tanks, 600-2500 ohms, how much room is there for mis-matching? If any... With these, can you go straight from the tube?
Click to expand...

10 vs. 8 ohms is not much its only 25% more.

But directly driving a 2500 ohm load with a tube is not at all the same thing. The pan needs Roughly about 1 to 4 volt peak to peak at about 6 to 10 mA. Sounds like a transformer is going to be needed. The good news is that you only need a tiny transformer that cost maybe $20.
 
#5
The low impedance reverb pan driven from a transformer is quite common. But tubes can drive the higher impedance pans. Look at some old AMpeg circuits that drive the pan via a cap from the plate of the drive tube. I'd much prefer the transformer, but ther are the options....
 
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