Fishman Loudbox Hiss

[RVA]

Mates

Out of nowhere, my Fishman amp started sounding like this when I turn it on. Any clue what happened to it?

Thanks

 

[RVA]

Bump - anyone know where I should look first?

 

[Thatbastarddon]

Bump - anyone know where I should look first?

Check any electrolytic capacitors for bulging, or leaking ends.

 

[RVA]

Check any electrolytic capacitors for bulging, or leaking ends.

Will do. Thanks

 

[Session 5]

Could be a bad ground, possibly replace input wire.
Caps or rectifiers, possible bad capacitor .

 

[RVA]

Could be a bad ground, possibly replace input wire.
Caps or rectifiers, possible bad capacitor .

It hisses without any inputs. Must be the caps or rectifiers. Question - what is a rectifier? I know of a rectifier tube socket on tube amps, but that is it. Thanks

 

[Session 5]

That's a good question , I don't know either, I read about this on problems with loudbox, so I cant answer your question.

 

[jtcnj]

Sounds like the ocean waves sound in a conch shell.
Add lots of spring reverb and play Dick Dale songs.

Sorry, to make light of your dilemma.
I have read of resistors causing hiss, but in the case of tube amp anode resistors.
when I am stumped at some point I will try the rattle test aka "The Fonz"

 

[RVA]

Sounds like the ocean waves sound in a conch shell.
Add lots of spring reverb and play Dick Dale songs.

Sorry, to make light of your dilemma.
I have read of resistors causing hiss, but in the case of tube amp anode resistors.
when I am stumped at some point I will try the rattle test aka "The Fonz"

I tried that fix. No luck!

 

[Session 5]

I talked with a friend of mine at the guitar shop thinks it could be the caps.

 

[RVA]

I talked with a friend of mine at the guitar shop thinks it could be the caps.

Thanks for asking Session. I will break it open soon. I will post any enlightening pics so we can have a look at what this sort of problem looks like.

 

[Session 5]

Your Welcome RVA!! Hope you get to the problem quickly, and get that beast pumping out some clean pure sounding music.

 

[Inspector #20]

Thanks for asking Session. I will break it open soon. I will post any enlightening pics so we can have a look at what this sort of problem looks like.

I have reserved comments because I am not sure and do not wish to muddy your waters...but i am rooting for you!!!!!

 

[RVA]

So, there was some oxidation on the board, fixed with a healthy dose of Dexoit.

Every so often, the solution is easy. I will cherish this moment!

 

[Session 5]

That was a quick fix!! Don't you wish they were all that easy?

 

[Truss_rod]

Wow that was a simple and quick fix. Congrats...

 

[burkeingraffia]

So, there was some oxidation on the board, fixed with a healthy dose of Dexoit.

Every so often, the solution is easy. I will cherish this moment!

This exact thing just happened to me. I'm not very good with electronics. I guess it's time to search for Dexoit on YouTube. By the way, does RVA stand for RIchmond, Virgina?

 

[Thatbastarddon]

This exact thing just happened to me. I'm not very good with electronics. I guess it's time to search for Dexoit on YouTube. By the way, does RVA stand for RIchmond, Virgina?

Those are his initials….he shops for monogrammed shirts etc. in Richmond VA ….he’s left the forum though, sadly.

 

[Thatbastarddon]

This exact thing just happened to me. I'm not very good with electronics. I guess it's time to search for Dexoit on YouTube. By the way, does RVA stand for RIchmond, Virgina?

…as to the Deoxit…it is a great thing to have around. Good for cleaning pots(volume and tone etc…not cookware), jacks, and so on. Available at many hardware stores, and Amazon, among other places.