I just bought a Fender Blues Junior amp and the reverb doesn't work, are these important?

If your amp looks like the one in Robert's link, the reverb unit is that black box screwed to the inside bottom (floor) of the amp. Sometimes they're bare metal. It does indeed contain springs...but not the ones in your photo. Those are retainers for your power tubes....put them back.

There *could* be something wrong in the amp's reverb circuit, but in order of likely culprits, it's low on the list. I'd suspect the cable, reverb unit, and circuitry in that order....especially since your amp was recently shipped. Reverb units are fairly fragile. They have several springs suspended between a couple of transformers with tiny wires. Easy to break if it shook around in shipping.

So start by checking the cable that runs from the amp to the reverb unit. It should have two RCA plugs (input and output). Make sure the plugs didn't come loose in shipping. On some amps, the cable is removable at both ends. If yours is, you might try replacing it with a known good cable if you have one from a stereo system or something.

Next, you can unscrew the reverb unit and examine it closely. Look for any broken wires between the spring retainers and the transducers. These are really hard to solder, but luckily, new reverb units are only $20. https://www.amplifiedparts.com/products/reverb-tank-mod-8eb2c1b If you have another amp with a spring reverb, try plugging that one in temporarily to check the circuit is working. Good luck....it's a cool little amp.

Yes, those springs look to be part of the reverb unit.

It has a standard style "springline reverb" rather than an electronic emulation.

There should be a frame with mounting points for the springs, set up so they rest on some form of transducer near each end or hook directly on transducers.


One end transducer transfers sound vibrations from the preamp into the spring(s), the other end pick up the vibrations feeds them back in to the amp.

The whole reverb unit frame is usually on rubber feet of some sort to minimise effects from external vibrations.


See the pictures below for some examples:
http://www.mojotone.com/M8AB2A1B-Reverb-Tank-Mesa-Boogie-Style-3-Spring-image.jpg

http://www.tdpri.com/telephoto/data/500/medium/three_tanks_inside.jpg

http://thumbs4.picclick.com/d/l400/pict/222246755707_/Pair-of-Spring-Line-Reverb-Units.jpg

If the photo below is the same version amp as yours, it appears the springline is supposed to be fixed in to the base of the cabinet - it's visible through the cutouts.

If the unit is intact, it could be a bad connection somewhere or failed component.


Edit- looking at more photos, those parts appear to be the retainers for the large pair of power output valves (tubes) - see the very bottom photo link..

They are the reverb, did you get the foot switch with the Amp. if not you have no way to turn it on or off

If you just got it, check everything else, too, and consider going back after the seller, E-Bay, and who ever shipped it. Meantime, I'll go with TommyMc. Do check that all your tubes are seated, lit and functioning. Next, check any wires going down to the reverb pan for damage. Everything else is not fun at all on a PCB rig. .

Springs is what made the reverb work. A guitar amp tech might be able to figure out a good repair for it.
Reverb is overrated, anyway....I like to play reverb free, and use a digital delay very sparingly...
The room you gig in will provide natural reverb and the old amp reverb just makes it sound phony...
Just my humble opinion