reverb transformer question

[dscottguitars]

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

[Nigel Goodwin]

Originally Posted by dscottguitars

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.

10 ohm to 8 ohm is perfectly fine, it's not that critical at all.

[dscottguitars]

Thanks, I'll get it...

FAST....

[ChrisA]

Originally Posted by dscottguitars

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?

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.

[Enzo]

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....