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View Full Version : How close can a reverb tank be to a transformer?

samdjr74
05-15-2007, 03:39 PM
Hi All,

I have R.L. Mott, aka blues49 building me an amp head and cabinet. The head is going to house my Peavey classic 50 amp chassis. The question I have is how close is far enough away for a reverb tank to be from the transformers? The problem I have is the transfomers stick up from the top of the chassis so the chassis itslef will be bolted to the bottom of the head cabinet. Because of this the reverb tank will have to go above the chassis and above the transformers, but what is a good distance between the two?

Thanks,
Sam
mark norwine
05-15-2007, 04:10 PM
High Z transducers can not be near the PT. But if your pan has a low Z input transducer [like a fender], that can be very close with no problems.

Years ago I used to add reverb to bandmaster heads. The pan is a press-fit under the PT. If the pan is oriented such that the low Z transducer is under the PT, all was fine. Other way around was hum city.

mn
samdjr74
05-15-2007, 04:14 PM
Hi Mark,

Thanks for the info, do you know how I can tell what type of transducers I have?

Thanks,
Sam
mark norwine
05-16-2007, 08:21 AM
What's the part number of the tank?
samdjr74
05-16-2007, 10:42 AM
Hi Mark,

I'll dig it up tonight when I get home.

Thanks,
Sam
s2amps
05-16-2007, 02:32 PM
Generally speaking, you want the input side of the tank toward the PT. It will be the lowest impedance of the two sides.
samdjr74
05-16-2007, 06:53 PM
What's the part number of the tank?

Hi Mark,

It's a accutronics 4EB2C1B

Thanks,
Sam
mark norwine
05-17-2007, 12:50 PM
"E" = input impedance is 800 ohms. That's higher by 100x than the Fender-style pans I used when I did the jobs described above.

You may be ok, but you might not. You're going to have to try it & see.....
samdjr74
05-17-2007, 12:56 PM
"E" = input impedance is 800 ohms. That's higher by 100x than the Fender-style pans I used when I did the jobs described above.

You may be ok, but you might not. You're going to have to try it & see.....

Thanks Mark, I'll give it a try tonight
samdjr74
05-17-2007, 01:00 PM
Generally speaking, you want the input side of the tank toward the PT. It will be the lowest impedance of the two sides.

Ok so if my PT is on the far right of the chassis, the inputs of the reverb tank should be nearest to it?
s2amps
05-18-2007, 12:27 AM
Yes. The output is higher impedance, which is more prone to picking up interference.