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I have a vox vt40 and the light for the power comes on bit there is no sound. I talked to someone with the same amp and they said there is a clip that switches on the tube that tends to go out with this...

If your amp isn't producing signal, your best bet is to take it into a local Vox autorized repair shop. There are leathel voltages involved and if you're not an experienced tech, you can get hurt, not to mention screwing to amp up worse. Here's a link to the Vox contact page
And one to find the list of Vox repair shops.
Korg USA Musical Instruments

Feb 11, 2015 | VOX Music

1 Answer

Is it possible to lower the VOX VT50 transfo outgoing voltage?

bulbs have tolerance, that means it can work with + or - 6.3v just use the 7.6v which a diffrence of ok for it to work.

Jun 27, 2014 | VOX Amplification Vox Valvetronix VT50...

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Vox vt40 factory reset

Consider reading the Manual for this amp, it explains how to reset to factory with the VFS5 footpedal. Or with the power off ..hold down CH1 & CH4 then turn power on.. when the Bank & Channel leds start blinking.. then release the Channel buttons. Next press the Tap switch ... the bank & channel leds will change from blinking to lit. with in a few seconds it will enter preset mode.

Apr 12, 2014 | VOX Amplification Vox VT40+ Valvetronix...

1 Answer

Vox vt40+

that is because it is two different output channels. eventually you will blow the speaker or your amp. It wasn't designed to handle the impedance of an external speaker through the stereo
headphone jack. Are you sure that your speaker is hooked up or plugged in?

Mar 30, 2014 | VOX Amplification Vox VT40+ Valvetronix...

1 Answer

I have a vox valvetronic 50, which keeps blowing fuses as soon as it is switched on and leaves a burning smell. any ideas?

One or more parts in the power supply section is defective. I would recommend taking/sending the unit to a repair depot.

Oct 20, 2013 | VOX Amplification Vox VT30 Valvetronix...

1 Answer

Vox vt120+ cutting out and then coming back on. even when the jack lead is not in the jack input. the fuses all seem ok.

i live in mexico and musics stores here sucks I'm an engineer and y started experimenting i think its an IC the TAS5615 im about to order it but does anyone know for sure what it could be??

Sep 28, 2011 | VOX Amplification Vox VT20+ Valvetronix...

1 Answer

I have a VOX NT15. When switched to Triode ( 7,5 W ) mode, my amp generates quite loud buzzing sound. The loudness of this sound is on the same level, no matter if the volume is switched to minimum or...

You LIKELY have a bad filter capacitor. The additional load of the Triode load is probably dragging the supply causing flattopping and the power supply ripple frequency to come through. Have the unit serviced.

Jul 26, 2011 | VOX Amplification Vox Night Train Amp Head

1 Answer

My guitar amp has power(Lights up),but no sound.Fuse was good,the one right by the power plug in.No blown capacitors or resistors.100 att vox 2 by 12''

Here is a link to Vox: Start by checking the wiring to the speakers and the speakers themselves.

Jul 19, 2010 | Music

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