Vox time machine high pitched whine?

[travisthedog]

I love this pedal. It's the perfect delay for me and my bands needs. However I have noticed now it seems to produce a very high pitched whine through the amp even when it's disengaged. If you remove it from the chain the whine stops so it has to be that pedal causing it ?

I wonder if I have enough juice as I am powering the following with just an old acdc brick thingy. GD Wah TU3 spark booster, fulldrive 2, GD distortion, MXR micro flanger and micro chorus, Mooer reverb and Vox time machine!!

Any ideas what might be causing this

[thermionic]

a) Try powering only the Vox Time Machine with your power supply (no other pedals),
b) Try another (separate) power supply for the Time Machine.

I'd probably just try Vox's own power supply for the Time Machine and leave the other pedals on the old supply.

[Sir Axeman]

Try it with a 9v battery and see if its still there...and then you'll find out if the power supply is the cause of the problem...or not!

[Not_the_DJ]

What's the total mA you can get from that PSU?

The drives will be pretty low, but delay and reverb tend to be pretty hungry. Anyway do what the others have suggested to see if it is a PSU issue (I'm guessing it is).

Incidently how's that Spark Booster working out for you?

[travisthedog]

Ok will do

Spark booster is one of the best pedals I have ever used mate!! Love it for fattening up single coils or driving an amp with humbuckers and its stacks so well with other pedals

[ICBM]

It could also be crosstalk via the supply between the clock frequencies of the two digital pedals, producing a frequency in the audible range. Try taking the reverb out of the chain (temporarily) instead of the delay, and see if it stops.

[travisthedog]

Tried that - no change

[ICBM]

OK, so it's either inherent to the Vox, or noise from the Vox affecting the other pedals via the power supply. Try just the Vox on its own with the same supply.

[Razorblade_beat]

Sounds like it needs an isolated supply...My timeline did something similar when not using separate power..

[Sir Axeman]

A simple test with a 9v battery should prove one way or another!! Easy to test.