HiFi Subjectivist ¦ Audio Forum ¦ NVA User Group

I have had my BMU for about 3 years now, however it has been out of use, stored away for the last 18 months. Now having the chance to bring it back into use I find that when plugging it in the fuse box trips out every time. Does it at any of the sockets in the house. Never did this previously, any ideas what the issue may be or do I have a nice unmarked perspex doorstop for the house now ?

Thanks in advance of any advice.

How many times have you tried plugging it in?

Is anything plugged into the BMU?

Damp in the wiring after storage?

Could try letting it dry out in a warm place for a day or 2.

savvypaul wrote: ↑Mon Mar 08, 2021 5:45 pm How many times have you tried plugging it in?

Is anything plugged into the BMU?

Tried twice upstairs using the same socket it used to be in and another one , then a further one downstairs all with nothing plugged into it.

Fretless wrote: ↑Mon Mar 08, 2021 5:54 pm Damp in the wiring after storage?

Could try letting it dry out in a warm place for a day or 2.

Thanks for the thought but it has been in a bedroom all the storage time so hopefully no damp ingress

Principia wrote: ↑Mon Mar 08, 2021 6:37 pm

savvypaul wrote: ↑Mon Mar 08, 2021 5:45 pm How many times have you tried plugging it in?

Is anything plugged into the BMU?

Tried twice upstairs using the same socket it used to be in and another one , then a further one downstairs all with nothing plugged into it.

First, check that nothing has fallen into any of the sockets. You may need to use a torch.

Assuming all clear, then try it up to 4 times, in quick succession.

If it's still tripping after that then there is something wrong.

Are you in the same house that you were when you last used the BMU?

savvypaul wrote: ↑Mon Mar 08, 2021 6:49 pm

Principia wrote: ↑Mon Mar 08, 2021 6:37 pm

savvypaul wrote: ↑Mon Mar 08, 2021 5:45 pm How many times have you tried plugging it in?

Is anything plugged into the BMU?

Tried twice upstairs using the same socket it used to be in and another one , then a further one downstairs all with nothing plugged into it.

First, check that nothing has fallen into any of the sockets. You may need to use a torch.

Assuming all clear, then try it up to 4 times, in quick succession.

If it's still tripping after that then there is something wrong.

Are you in the same house that you were when you last used the BMU?

Thanks Paul I'll give those suggestions a try, yes same house.

Principia wrote: ↑Mon Mar 08, 2021 6:53 pm

savvypaul wrote: ↑Mon Mar 08, 2021 6:49 pm

Principia wrote: ↑Mon Mar 08, 2021 6:37 pm

Tried twice upstairs using the same socket it used to be in and another one , then a further one downstairs all with nothing plugged into it.

First, check that nothing has fallen into any of the sockets. You may need to use a torch.

Assuming all clear, then try it up to 4 times, in quick succession.

If it's still tripping after that then there is something wrong.

Are you in the same house that you were when you last used the BMU?

Thanks Paul I'll give those suggestions a try, yes same house.

OK.

BTW what is the maximum constant power consumption rating of your Jadis monoblocks? Did you ever use them with the BMU?

@ Savvypaul

Max power consumption 110V, yes used them before.

However, all immaterial as the 4 times re-try has worked a treat and all seems to be working now.

So firstly big thanks for the suggestions and secondly what is the mysterious power of 4 that fixes the BMU ?

Principia wrote: ↑Mon Mar 08, 2021 7:30 pm @ Savvypaul

Max power consumption 110V, yes used them before.

However, all immaterial as the 4 times re-try has worked a treat and all seems to be working now.

So firstly big thanks for the suggestions and secondly what is the mysterious power of 4 that fixes the BMU ?

Just Tomasz's experience of building and testing them.

When first built, most would trip once and then be good. Very occasionally, one would need 3 or 4 attempts.