#1
Hi everyone,

I recently bought a Randall RG75 G3 amp. It's a valve dynamic amp, it has one tube. When I turn the master volume higher then about 50% I suddenly loose all sound. No cracks or pops or anything like that, just no sound. I've checked cables and effects and my guitar but the problem really seems to be the amp. Does anyone have any idea what might be causing this? is it the tube? The strange thing is that when I turn my master volume down and my level volume up the amp does give sound, even high volumes. Please help me with this, I have no idea how to solve this.
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Randall RG75 G3

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#2
I'd say a faulty pot?
Haven't got anything more to contribute though, sorry.
#3
I know some of the higher quality rigs have capacitors on them that prevents you from blowing the speakers, but I could be wrong.

Try fiddling with the gain; I'm guessing you have it maxed out so try lowering it and cranking the volume... Randall's are solid this is kinda odd...
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#4
When i turn the volume up high it sometimes still works for a few seconds, some times even half a minute before the sound dies. So I don't think it is a capacitor, wouldn't that kill the sound immediately? The problem already occurs when I use the clean channel with 50% channel volume and 50% master volume, so I think it's kinda strange that the speakers could already be blown at such a low setting.
Washburn X50 PROFE
Dean Custom 450
Morley PWA Pro Series Wah
Big Muff Rams head
Zoom G2
Ibanez Phase Tone
Randall RG75 G3

Tales of Ale: http://www.talesofale.com
#5
It's a manufacturing fault in the G3 series as far as I remember, I'm not sure of the specifics but if you went and had a look at the official Randall message boards I think you'll find a lot of guys with the same problem. Sorry to be the bearer of bad news
#6
I've checked the Randall forums now, there are indeed people who have the same problem although others report that they don't have any problems at all. I've read about the possibility that it might be a safety mechanism triggered by feedback that is so high you can't actually hear it. Anyone know if this is plausible?
Washburn X50 PROFE
Dean Custom 450
Morley PWA Pro Series Wah
Big Muff Rams head
Zoom G2
Ibanez Phase Tone
Randall RG75 G3

Tales of Ale: http://www.talesofale.com
#7
If it's under warranty, I'd just send it back.
#8
Nope, no warranty. Thanks for the replies so far, anyone else have any suggestions?
Washburn X50 PROFE
Dean Custom 450
Morley PWA Pro Series Wah
Big Muff Rams head
Zoom G2
Ibanez Phase Tone
Randall RG75 G3

Tales of Ale: http://www.talesofale.com
#9
Any word on the forums of a fix?
Take it to an amp tech they maybe be able to sort it out.

If it is a manufacturing fault on them e-mail Randall and ask about it.
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#10
No fixes on the forums, but some stories of people sending it back to randall with randall replying that there was nothing wrong with it. I'm gonna get my amp checked out by a technician, but I do find the suggestion that there are capacitors that prevent high volumes to protect your speakers idea plausible. I'm running active emg pickups into this amp giving a very high input signal. That or some kind of (internal) feedback killing the sound.
Washburn X50 PROFE
Dean Custom 450
Morley PWA Pro Series Wah
Big Muff Rams head
Zoom G2
Ibanez Phase Tone
Randall RG75 G3

Tales of Ale: http://www.talesofale.com