Canadian Amp Broken By English Power - In Need Of Help

If you're lucky you just blew a fuse. If you are not lucky you get to buy a new amp.

 

I agree. Given the cost of a new Rumble 40W, anything more than a fuse will put you in the red on a repair. Perhaps your friend could chip in?

 

Before you spend money on transporting an amp to a country with a different voltage standard you should ensure that the amp will be compatible. If your fuse is OK then sadly it’s tech time.

BTW Welcome to the ranks of Talk Bass.

 

English power is a mere shadow of it's colonial self. Rise up and take your freedom.

 

The converse dear chap! as has been adequately proven, British power is capable of instantly destroying those devices configured for new world colonial use.X
Regards Fairfax God save King George.

 

I thought British power used to be double US power, but now it's only about 25% more.

 

Tongue in cheek? UK voltage is 230V, 50 Hz.

 

I saw British Power back when they were still playing small venues, before they achieved raging success.

 

Oh, I was talking about purchasing power. That's altogether different.

(I'm 50% British in case someone gets ruffled)

 

It was always 240V 50Hz when I lived there!

 

As a thoroughly British Bass Player (and electronics engineer!) I would suspect that you have blown one (or both) voltage regulators on the main Power supply.
The only difference in Amps being sold around the world is the transformer, as it has to accomodate different supply voltages to give the same output voltage to the rest of the electronics.
As the uk voltage (240) is greater than the canadian voltage (120), you will have exceeded the Voltage regulators maximum supply voltage and fried them. Parts LM7815 and LM7915s (15V version) I think (looking at a Rumble 85W pdf..)

I suspect its not a spurious fuse blown, as, if the voltage was doubled, the current would be halved (and its current that blows a fuse, not voltage).
Although after blowing the regulators, it probably blew the fuse as a consequence, but not the root cause..

 

Is there a fuse in the plug that you can check?

 

last I checked 240 volts across a circuit puts twice as much current through it as 120V.

 

Nothing's ever simple--I read online that UK voltage historically was 240V +/-6% but is now "declared" to be 230V +10% to -6%. Whatever that means!

[Third paragraph on this page: Environmental Technology Centre | Voltage Optimisation]

 

I’ll measure it on my trip home hopefully next month.

 

I heard British Power is opening for Fried Canadian at Coachella this year

 

Let's see, Y-fronts, trousers, volt meter, ...

 

I thought you reconfigured your power net when you left EU.

I mean I didn't think you wanted to be dictated by EU standards, then yet as it turns out the very network that supply you with power are.

Now that is what I call irony!

 

Nah! My brothers have all that!