Orange Amps Forum

My AD 140 Lead has started to develop some weird noises. The noises remind me of some old john wayne war film where the duke instructs the radioman to contact HQ for support. The radioman frantically searches for the correct frequency and we hear all those whooping and swooping sounds.......my amp makes a similar sound but only lasts for a few minutes and then disappears and normality and tone are restored. Then if I decide to put the amp on standby and come back to playing after a break, I flick the switch and the dukes radioman is trying to tune in again for a few minutes before disappearing again. All the tone and volume is there (or at least appears to be in my ears) Any other Orange users experience similar problems?

Will it do it if the volume is turned all the way down

I shall fire it up later and see if that happens

makjoh wrote: ↑

Mon Apr 08, 2019 6:27 pm

I shall fire it up later and see if that happens

The volume control is after the phase inverter on that amp. If it doesn't do it with the volume all the way down you can probably trace it to the pre-amp somewhere.

The volume and gain are to blame.......when gain is up nothing heard until volume turned up, similarly, when volume is up nothing heard until the gain is moved. A screeching noise can be heard in addition to the 'radioman tuning in'

Kind of sounds like a microphonic tube.