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Author Topic: Fender Single Spring Reverb Tank?  (Read 1121 times)

Eddie Eagle

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Fender Single Spring Reverb Tank?
« on: January 29, 2020, 11:50:59 am »

I have my Blackface Pro Reverb Amp getting some work done on it and the repair guy says I have a single spring reverb tank in it.
Anyone have any info on those? I see info on 2-3-4 spring but no single spring. It's not working so it'll be replaced with a multispring Fender product.
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mbrebes

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Re: Fender Single Spring Reverb Tank?
« Reply #1 on: January 29, 2020, 12:09:37 pm »

Blackface era was a two-spring reverb tank.  I have never seen an intentionally made one-spring but I have seen tanks that have lost one whole spring.
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Eddie Eagle

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Re: Fender Single Spring Reverb Tank?
« Reply #2 on: January 29, 2020, 12:55:32 pm »

How does it lose a spring? just sproing off at a connector? ") I'm going to get the old unit back so I'll have a model number of the unit.
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Jim Williams

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Re: Fender Single Spring Reverb Tank?
« Reply #3 on: January 30, 2020, 11:50:22 am »

Springs break off from the end connector. It's soldered through to the brass end cap with a magnet in the center, it moves therefore it can break. Fender uses Accutronics "A"  8 ohm drive coil 2 spring 19" tanks.

I've replaced many over the years with Type 9 three spring models in the medium time constraint. Fender used the long reverb time tanks. Those tanks are available from:
www.allparts.com
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Eddie Eagle

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Re: Fender Single Spring Reverb Tank?
« Reply #4 on: February 07, 2020, 05:06:52 pm »

Here's a pic of that spent reverb tank. Got a new one and had the amp pots cleaned and vibrato fixed stuff back into good shape.
The Pro Reverb sounds great again.
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mbrebes

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Re: Fender Single Spring Reverb Tank?
« Reply #5 on: February 08, 2020, 04:33:05 pm »

It can easily be seen from the picture that the lower spring has broken off at both ends.  Accutronics was bought by another company.  I think the best available springs now are made by MOD.
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Eddie Eagle

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Re: Fender Single Spring Reverb Tank?
« Reply #6 on: February 18, 2020, 10:36:38 am »

new 2 spring replacement was only $40 so it was an easy fix to replace.
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