Orange Rockerverb 50 head, noise issues. Any suggestions?

  • Thread starter Thread starter DoomBuggi
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DoomBuggi

DoomBuggi

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My friend has an Orange RV50 head. It has been having noise issues, and he replaced the preamp tubes in it. Still making noise. He has tried running it direct, but it still is giving him trouble.

His quote;

I changed my preamp tubes on my Orange Rockerverb 50, but it is still making a loud, scathing noise when I mute my guitar. I did it just plugging my guitar into the amp directly and still did it. Any idea of what it could be? Still bad tubes, clean out the tube insertion area, or any other options I should try, let me know!
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Any suggestions?
 
could be a bad ground or a ground loop problem. What does he mean by mute the guitar? Palming the strings, rolling back the volume? Unplug?
 
Scratching or crackling noises can come from a resistor going bad, usually a plate resistor in the preamp. Could also be a dirty jack, socket or switch. You can isolate which part of the circuit is the source of the noise: does the volume of the noise change when you rotate the gain, master, etc.
 
What up, guys?

I am the guy who was asking the problem. When I mean mute the guitar, I mean either palm mute the strings or turn the volume knob all the way down. And yes, if I turn the gain or master down, the noise does diminish, but it is still there. Thanks guys. I am sure the preamp tube sockets need to be cleaned out. What is a good product to use to clean them out?

Steve
 
Which version of RV50 do you have, the mk1 or mk2?

Are you sure you amp is grounded?
 
I have a MK I. I am more than positive my amp is grounded, but just in case, what is a good way to figure out if it is or not?
 
guitarstevecc":2p96faop said:
What up, guys?

I am the guy who was asking the problem. When I mean mute the guitar, I mean either palm mute the strings or turn the volume knob all the way down. And yes, if I turn the gain or master down, the noise does diminish, but it is still there. Thanks guys. I am sure the preamp tube sockets need to be cleaned out. What is a good product to use to clean them out?

Steve
Click to expand...

Hosa D5S6 DeoxIT Contact Cleaner Maximum Strength Aerosol Spray

Try a different guitar and cable if possible, check for tube micro-phonics, from there open up the chassis, Don't touch anything but just look and smell for burn't electronics, if nothing looks blown you can turn the amp on and tap on the components and see if they are the cause. (with chopstick)Look for loose or burnt looking connections.

If you do find a problem at the component level you will need to research proper capacitor discharge procedures for you amplifier. De-Solder the bad component out and solder in a new on. Check your capacitors for bubbling tops or signs of them being unsymmetrical. These caps might be on their last leg.

I can tell you where to find tools or where to find an amp tech?

Amp tech charges $65 for a diagnose and tune up. about an hour labor that goes towards shop overhead.

Luke
 
guitarstevecc":2lpdyt0u said:
I have a MK I. I am more than positive my amp is grounded, but just in case, what is a good way to figure out if it is or not?
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You can either use a DMM and confirm that the case is grounded or get one of those cheap outlet checkers and check your outlet.

I had an RV50 MK1, it had a few bad Alpha pots (there was a bad batch around that time), probably not causing the hum, but it would jump up to max volume sometimes without me touching the pots. I also had issues with the effects loop and reverb. I would check your connections between the circuit boards inside. I assume you know that there are deadly voltages inside the amp, so proceed with caution.
 
Thanks guys! Last night before practice I tried replacing preamp tubes with old preamps tubes to see if maybe it was a bad tube, but it didn't solve the problem. I tried a different guitar cable, and that didn't solve it. In all honesty, I am sure my amp needs a good clean and such. I mean, I have gone for 5 years without any issues. I mean, I would like to figure it out on my own, but if a guy charges $65 for diagnosis, I mean do that. I am going to try and few more things you guys suggested, and see what happens. If that doesn't work, I will take it to a guy. Who do you recommend, Luke? Thanks again, cheers! - Steve
 
guitarstevecc":2q2x999k said:
Thanks guys! Last night before practice I tried replacing preamp tubes with old preamps tubes to see if maybe it was a bad tube, but it didn't solve the problem. I tried a different guitar cable, and that didn't solve it. In all honesty, I am sure my amp needs a good clean and such. I mean, I have gone for 5 years without any issues. I mean, I would like to figure it out on my own, but if a guy charges $65 for diagnosis, I mean do that. I am going to try and few more things you guys suggested, and see what happens. If that doesn't work, I will take it to a guy. Who do you recommend, Luke? Thanks again, cheers! - Steve
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He is up and dallas and has worked on my amps. Give him a call and he will know someone reputable in austin.

http://www.dallasvintageguitars.com/guitarshop.htm
 
The fact that the volume changes with the gain control means that the noise is coming from the first gain stage (or whatever is in front of the gain pot on that channel).

The fact that the noise is still there when gain and vol are on zero means that it's not all coming from the first gain stage.

RV50C_sheet1.jpg
 
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