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Reverb Tank

au_rick

Active member
Joined
Mar 18, 2010
Messages
857
Hi All,
just bought a cheap amp for my practise room and it's missing the reverb tank.
Are these fairly generic other than the difference in the number of springs ?
 

poor man's burst

Active member
Joined
Oct 3, 2010
Messages
258
They are not. There are a lot of variations, not only in size, number of springs and decay length, but more important, transducers impedance and grounding, which should match the send and recovery circuit impedance.
 

El Gringo

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Joined
Apr 8, 2015
Messages
5,263
Accutronics is what Fender use for the spring reverbhttps://www.tubesandmore.com/search/node/reverb%20tanks
 

au_rick

Active member
Joined
Mar 18, 2010
Messages
857
They are not. There are a lot of variations, not only in size, number of springs and decay length, but more important, transducers impedance and grounding, which should match the send and recovery circuit impedance.
Thanks for the heads up.
Can I check impedence across the RCA plugs with a meter or do I need to look up the specs of the amp ?
 

PaulD

Active member
Joined
Jun 25, 2007
Messages
611
No, multimeters measure DC resistance and measuring the DC resistance across the plugs will not tell you what the input and output impedance of the amplifiers reverb circuit is (DC resistance and impedance are not the same thing). You either need to know the specifications of the amplifier or use a signal generator and oscilloscope to measure the output and input impedances of the circuit. https://learnabout-electronics.org/ac_theory/impedance73.php
 

poor man's burst

Active member
Joined
Oct 3, 2010
Messages
258
Reverb tanks have a code stamped on them, which gives all the tank's specs (number of springs, decay length, transducers impedance, grounding schematic, etc...). It looks like 9AB2C1B. Letters and numbers change according to specs. AFAIK, all the reverb tank brands (Accutronic, Mojo, Beltone) use the same code. If you can find someone who has the same amp and can check the code number for you, then you could find the tank you need.
 

Wally

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Joined
Feb 27, 2003
Messages
3,458
One wonders what amp the OP is working with, right?????
 

au_rick

Active member
Joined
Mar 18, 2010
Messages
857
One wonders what amp the OP is working with, right?????
It's actually a Crate GX series.
Thanks for the replies, I think I'll try a few and see what sounds best.
I've never cehcked the model numbers but I love the reverb on my Marshall JCM's but can't stand the reverb on my Mesa Boogie :unsure:
 

renderit

Well-known member
Joined
Jan 19, 2009
Messages
10,467
Yes, reverbs are all over the place.

That is why I got the Victoria Reverbrato.

Vibratos are all over the place as well.

This has them both covered in spades and now I don't have to worry if an amp has one that sucks.

Yeah, it means you have another piece of equipment to lug around, but the SOUND, Oh My!

35712423593_07a6397a19_4k.jpg

36353156782_3e1559166a_4k.jpg

36383888241_7cb55325cf_4k.jpg
 

Wally

Well-known member
Joined
Feb 27, 2003
Messages
3,458
here’s an overview of reverb tanks of different type.

Here is the online Catalog. You might get in touch with this source. They might very well
know what tank you need. Or…you can search through the tanks in the catalog and you will probably find your amp listed in the literature of the correct tank as to application. Good luck….I did not find any info in a a quick search for a reverb tank for any GX.
 

bern1

Well-known member
Joined
Nov 23, 2004
Messages
1,244
Yes, reverbs are all over the place.

That is why I got the Victoria Reverbrato.

Vibratos are all over the place as well.

This has them both covered in spades and now I don't have to worry if an amp has one that sucks.

Yeah, it means you have another piece of equipment to lug around, but the SOUND, Oh My!

35712423593_07a6397a19_4k.jpg

36353156782_3e1559166a_4k.jpg

36383888241_7cb55325cf_4k.jpg
Looks like a cool piece of kit. Looks like the full reverb circuit. What kind of term circuit is it?
 

renderit

Well-known member
Joined
Jan 19, 2009
Messages
10,467
Full Vibrato with actual tone shift.

The Reverb is based on the 65 Blackface Twin and the Vibrato is the 63 Brownface Concert.

The reverb settings are awesome as they let you "mix" the "size" of the room and the Vibrato lets you go from a very usable "slight" to a mind bending tone.
 
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