Anyone good with electronics? Guitar Amp question...
 

I want to take my solid-state Ampeg guitar amp with me to the UK but it doesn't have selectable voltage and I need to run it on UK 240v power. I was going to get a big step-down transformer but was also wandering if it would be easier just to modify/change some internal components in the amp?

Not an expert here, but used to mess with electronics alot in my younger days. I think the easiest for you would be to just buy an adapter.

There is an internal switch on most amps built for international distribution. Take it to an authorized Ampeg service center. You're gonna need one helluva converter if you're planning on pumping gobs of current throught that thing.

Hey chazola - how attached are you to the amp?

If it's not rare/collectible, I'd sell it and get a replacement in the UK, esp. if you are moving there for a while. Converting it would be expensive enough to justify replacing it (unless it is rare/collectible).

Running a transformer is a pain in the butt. They tend to get really, really hot and can burn out if not cooled well. Are you gigging or is it just practice/casual use?

You would need a step up trasnformer, 120V - 240V. If you are attached to your amp for sentimental reasons, then contact the manufacturer and see if they have a replacement transformer, with multiple primary windings and a switch you can buy to make it work on 120 or 240. You will also need a new line cord for the UK.

If you can't get a replacement transformer, then get a step up transformer with about a 25% more power rating than your amp. This is due to the lower power frequency, 50Hz vs. 60 Hz, which causes increased heating in the transformer windings and core. This will give you a margin of safety.

Otherwise, sell the amp and buy one over there. Maybe Ebay UK has something that will suit you. Maybe you can sell yours on Ebay. Someone in the UK may be in the same predicament as you. :)

The issue here is the power transformer. Most have more than one set of primary taps, one for 110v and another for 220v. If your amp has these it is a very simple wiring change to convert. Try to find the schematic for your amp - all of this will be on the schematic.
Good luck!