Mini Recto : FX Loop and power drop problem

[D2dark]

Last night I experiment a power drop out of nowhere. I've shake the amp and it has come back slowly. I heard I was not the only one with this problem at my local music store. but they don't know how to fix this and make sure it won't comeback.

FX Loop problems, I recently get myself a Nova Repeter, good working pedal. it works perfectly in my DC-2, but when I plug it in my mini loop, I have a lot of noise, weird click that follow the blinking LED.. WTF?! and what can cause that?

 

[ratter]

I would start by swapping tubes with a new/known good set.

 

[elvis]

Power drop is probably a bad tube or tubes.

The noise issue is almost certainly a ground loop. It would be different from amp to amp due to circuit and ground differences. Try an Ebtech HE-2 between the ND and MR. You should also make sure that the ND power supply is plugged into the same outlet as the MR.

 

[D2dark]

The nova power come form my DC brick, and the power form the brick is the same as the amp.
I'll continue to a/b things in my loop...

 

[D2dark]

Update :

Tubes are all ok
I've fix the power problems.


But the fx loop is still big crap, I have hums and something like a 10khz as soon as I plug something in.

Anybody else had that problem with a mini ?

 

[elvis]

What caused the power drop?

 

[paulg2uk]

Isn't the nova repeater 12 volts? and the dc brick can do either 9 volts or 18 volts. Could be why it went out? I had some ground loop recently but plugged everything into the same outlet and it disappeared. Have you got the power adaptors running along side the audio leads or something? That can effect it as well.

 

[D2dark]

I do t have the nova any more, I run a G-Major, same problems with any pedals or anything I plug I there.

 

[paulg2uk]

I do t have the nova any more, I run a G-Major, same problems with any pedals or anything I plug I there.

Very strange, I do get a little hiss but nothing noticeable and I have a TC Nova System hooked up by a pedal snake. Could it just be your cables maybe?

I'm having another problem with an occasional high pitched squeal that happens on chan 2 on 10 watts. As soon as you switch to 25 watts it disappears. Mesa and a few people on here think it might be a power tube problem. I'll probably end up swapping out the tubes more than likely.

 

[markblasco]

I had a similar issue with noise, and it turned out that the issue was just that I didn't have the amp loud enough. Since there is no master volume, anything in the FX loop is basically going into the power amp at full volume, and if it creates any noise at all, that noise will also be full volume. You wouldn't notice this with the amp cranked, but when you turn down the individual channels to a lower level, the noise doesn't turn down. So, at performance levels it would be fine, but at bedroom levels it was unusable.

I solved it simply by running both channels close to max volume, and then I put a volume control in the FX loop after the FX. This acts as a master volume. That way, when I adjust the volume with the volume control in the loop, it turns down the FX in addition to the channels, which turns down all of the noise as well.

If you have a volume pedal you can try the same thing and see if it works.

 

[D2dark]

I'll make a master volume box.

What should I use ? 500k ? Linear ?