legend RnR 50 problems

[rock and roll eddie]

Hey Ive got this Legend rock and roll 50 and i had for 4 days and left the room for a few minutes and it quit working.
its only a whisper now....it was so good the day before my neighbor from across the street could hear it...then nothing

I'm thinking it needs new caps, and maybe a resistor or diode too.

does this sound right?...no smoke or smell, just a very warn tranny and barely any sound.


thank you very much

[Randall]

I used to own that amp. If I recall, there is a preamp out and power amp in jack, right? If so, before you do anything else plug a cable from one to the other. If it comes back on then the power amp switching jack needs cleaning. I direct you to the sticky thread posted at the top of this forum.

[Enzo]

I'm thinking it needs new caps, and maybe a resistor or diode too.

does this sound right?

No.

We have no reason to think that all of a sudden this amp killed all its caps plus resistors and diodes.

[rock and roll eddie]

i tried Randall's suggestion and its the same....crackiling, popping, the signal is going through but no music.....
i also have the Rock and Roll 100, and ive been using it for 20 years and it makes the same noises, when youre not playing, but it is SO loud you cant believe it..
i guess i went into a panic, Enzo is right, nmy dad used to tell me the same thing about automobiles....it's usually one thing breaking at a time....not 3 or 4.
I been studying rebuilding some old Hammond and Leslie amplifiers; and they are all tube power sections and from the 50's and 60's, and ive even got two Leslie cabs from 1936 i think,
and they say always replace the electrolytics, and the resistors....i know the electrolytics in these are better quality, but they are still almost 40 years old.

so i guess i need to poke around with some chopsticks and look for a loose or broken wire?...i dont SEE anything burnt.

[Randall]

Replacing the electrolytics is probably time to do so, but it's not the source of your particular problem. You have something breaking down, either a connection, such as a tube pin and socket (spray it with DeOxit), a bad solder joint (re-solder) or a component breaking down.ONE COMPONENT breaking down. One silly resistor or capacitor.

Plugging a connector into the power amp in jack will disconnect the the preamp from the power amp and will tell you something important. If the noise still happens, then it is in the power amp section. If the noise stops, then it is in the preamp section.

[Enzo]

So plug the guitar into the FX return (or power amp in jack, whichever they call it here). Does that come through clear or does it have the same problem? This tested the power amp alone.

Run a cord from preamp out (FX send) to some other amp, play through the preamp and what does it sound like coming out the other amp? If it still sounds the same, your preamp has the problem. If it sounds clear, then the preamp works.

[Jazz P Bass]

Legend Rock "N" Roll 50 G1250SC
Solid state amp.
Tube preamp.