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Troubleshooting a reverb tank


Ray18

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The reverb in my classic 50 stopped working, so I pulled the tank out and started metering it looking for bad connections

 

I found that theres a short between the hot and ground at the input of the tank..I used the feature on the meter that makes a tone if there's continuity

 

 

Any ideas as to what might have failed? the amp was shipped recently, and the verb worked when it came home, but the next day the verb was off

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Originally posted by Ray18

Would the output inducter shorting out be indicitave of a problem in the amps circuitry? I'd rather not have to buy a new tank just to have it blow out again



this sucks, I loved my reverb
:(

 

 

reverb tanks are just overly sensitive to bumps and such .it could just be from shipping.working for a music store that sells alot of fender reverb amps -close to a third of the tanks get killed in shipping or go out shortly thereafter. if theres no loose wires in the tank (look closely at the in and out jacks - they tend to break there between the transformer and jack),then you're pretty much outta luck.

otoh you could just get a schematic and check the send voltage against the schematic - that should tell you if it's the amp or just a bad tank.

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Originally posted by garfight




reverb tanks are just overly sensitive to bumps and such .it could just be from shipping.working for a music store that sells alot of fender reverb amps -close to a third of the tanks get killed in shipping or go out shortly thereafter. if theres no loose wires in the tank (look closely at the in and out jacks - they tend to break there between the transformer and jack),then you're pretty much outta luck.

otoh you could just get a schematic and check the send voltage against the schematic - that should tell you if it's the amp or just a bad tank.

 

http://www.blueguitar.org/new/schem/peavey/c50schem.pdf

 

 

*edit*

 

but there is an open on the output inducter, I'm pretty sure thats exactly what my trouble is

 

 

I have no clue were the reverb is or what the voltage is...could you find out for me from the above link? I would really appreciate it :)

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i don't see any test voltages listed in the reverb circuit anywhere in that schematic man. they could be listed in their own schematic as that one is labled "pre and main board"and has numbers where the test points should be (the reverb circuit runs through j21/31 on pin 2).

that being said if it is the output inductor in the tank that is blown it was more than likely the tank and not the amp.i don't get alot of peaveys in the shop but most of the fenders i work on that have problems in the circuit before the tank- the input transformer in the tank or the last cap in the circuit before the reverb send blows up. if it was mine i would just drop in a new tank and be done with it.or call the nearest peavey dealer and get em to give me one :)

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Originally posted by garfight

i don't see any test voltages listed in the reverb circuit anywhere in that schematic man. they could be listed in their own schematic as that one is labled "pre and main board"and has numbers where the test points should be (the reverb circuit runs through j21/31 on pin 2).

that being said if it is the output inductor in the tank that is blown it was more than likely the tank and not the amp.i don't get alot of peaveys in the shop but most of the fenders i work on that have problems in the circuit before the tank- the input transformer in the tank or the last cap in the circuit before the reverb send blows up. if it was mine i would just drop in a new tank and be done with it.or call the nearest peavey dealer and get em to give me one
:)

 

Well, its the same brand of tank in like every amp (Accutronics)...I just have to find a dealer in Calgary for the tpye I need

 

I can probably get an upgrade too...something I little higher quality than what the amp came with

 

but I tell you, first thing I'm doing is covering those little inducter wires with epoxy or hot glue or something

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Originally posted by garfight

i've done the hot glue thing on em more times than i'd like to admit:)

its just one of those things you have to do if someone is gigging with it all the time.unless you have a big fat roadcase or are insanely careful with them they just kick off at the worst possible time.

 

why don't the do that right out of the factory? :freak: Verb tanks are the cheapest/weakest things on amps by far. You would think that if a THIRD of tanks fail these amp companies would take steps to prevent that.

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I had to replace the tank in my Rivera not too long ago and I called up Accutronics. It cost $35 shipped for a new 8-series tank. Give Accutronics a call and have your model number handy. It only took me a week for the tank and they were really helpful. Ultimately, reverb tanks are very fragile and difficult to fix, so it's usually easier to just get a new one. The only quick fix for a reverb tank is if the transformer connections come unsoldered which is common. Mine had a broken spring, so no dice on a repair. Also, if you keep the same input/output impedance and chassis style you can improve the reverb by getting a longer tank, like the 9-series.

 

http://www.accutronicsreverb.com/

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