Can someone explain this?

[Vic Winters]

First off let's try to keep the Behringer bashing out of this thread.

I have a BDI21 that has a weird characteristic. It only powers up with a certain power supply. I have two 1-Spots and another 9V adapter that came with my BBE Opto-Stomp. All three of these power supplies work as they should (power all my other pedals without issue), and are standard Boss type center negative 9V. However, the BDI21 only powers up with one of the 1-Spots or a 9V battery.


Can someone explainable how this is possible?

[bongomania]

Huh. So it works with one of the 1-spots but not the other? That is odd. If you have a caliper, maybe you could measure the plug ends of both 1-spots. Perhaps the length or inside/outside diameters are just different enough to mean poor contact with one of them (assuming the BDI's DC jack is bent or finicky about size)?

[ehque]

Sounds like a slightly out-of-spec connector, either on the BDI or the 1-Spot?

I think the design of the standard 9V connector is quite bad, Behringer or not...

Maybe check it with a 2.1mm to 9V battery clip converter?

[Lizooki]

Not all power supplies have the same power rating.
Even if they are all 9v the amperage may be different.
I have some...for other uses that range from 120ma out put to 1200ma.

Maybe the BDI21 needs higher amperage?

Matt

[KarateKid25]

Originally Posted by Lizooki

Not all power supplies have the same power rating.
Even if they are all 9v the amperage may be different.
I have some...for other uses that range from 120ma out put to 1200ma.

Maybe the BDI21 needs higher amperage?

Matt

While thats true, the odd thing with this question is that the unit works with one of the one spots and not the other.

Im presuming the one spots are identical to each other?

[Vic Winters]

They should be the same, I bought them within a few months of each other.

[niftydog]

Originally Posted by Vic Winters

First off let's try to keep the Behringer bashing out of this thread.

It's difficult to do that when faced with this kind of fault!

I'm leaning towards off-spec power connector in the Behringer. Do either of the other supplies work if you jiggle the cable and hold it 'just so' to make the connection?

[Munjibunga]

Originally Posted by Vic Winters

First off let's try to keep the B-word bashing out of this thread.

I have a BDI21 that has a weird characteristic. It only powers up with a certain power supply. I have two 1-Spots and another 9V adapter that came with my BBE Opto-Stomp. All three of these power supplies work as they should (power all my other pedals without issue), and are standard Boss type center negative 9V. However, the BDI21 only powers up with one of the 1-Spots or a 9V battery.


Can someone explainable how this is possible?

Mask your profanity completely or your post will be deleted. Fixed it for you.

[ehque]

Originally Posted by Munjibunga

Mask your profanity completely or your post will be deleted. Fixed it for you.

ZING.

Actually if one 1spot works, i'll put the blame on the OTHER one spot being the out of spec connector, not the BDI. As i said, try some other connectors. I'm sure you have a daisy chain around somewhere.

[Vic Winters]

Well ladies and gentlemen, I took the red pill and the the rabbit hole really is deeper than originally believed. It has nothing to do with connector size. The BDI21 will simply not power on if it is the only pedal being powered. When I did my testing the other night, I had the "working" 1-Spot connected via daisy chain with 4 other pedals. (The "working" 1-Spot was zip tied to the bottom of my board and I didn't feel like disconnecting it at the time.) The other 1-Spot I had was not connected to a daisy chain or other pedals. Same with the BBE power supply. After proper testing I found the "working" 1-Spot also does not properly power the BDI21 when it's only the power supply. However, if I added a daisy chain to any of the 3 power supplies and put a few pedals in the chain along with the BDI21, it powered on. So now I'm even more confused.

[niftydog]

Ah, whacky... so it sounds a bit like the boss ACA/PSA issue - see here.

So, did you test this with patch cables connected between the BDI21 and the other pedals? Try re-testing this with no patch cables plugged in to the BDI21. I'm thinking the cable is providing the ground path for the BDI21.

[Vic Winters]

Yup tried it with cables between the pedals. Needs a cable in the input.

[KarateKid25]

Originally Posted by Vic Winters

Yup tried it with cables between the pedals. Needs a cable in the input.

Been caught by that one before...

A lot of pedals need the input plugged in before they will fire up

[Vic Winters]

That's not the issue though. If it's the only pedal plugged into any of the 3 power supplies (cables in the input or not) the pedal won't turn on.

[KarateKid25]

Originally Posted by Vic Winters

That's not the issue though. If it's the only pedal plugged into any of the 3 power supplies (cables in the input or not) the pedal won't turn on.

Ah ok... Sorry, I thought you had resolved the issue by plugging somthing into the input.

[niftydog]

Originally Posted by Vic Winters

Yup tried it with cables between the pedals. Needs a cable in the input.

Ok, um, duh! <slaps forehead>

So, try this, leave a cable plugged into the input, but don't connect the other end to anything, and have nothing plugged into the output. If I'm right it won't work. But as soon as you plug in another pedal connected to the daisy chain it will spring to life.

It sounds as if the signal cables are providing the ground path (via the other pedals connected to the daisy chain) for the power supply. If so, this would mean the ground connection on the BDI is faulty.

[musicelectronix]

Originally Posted by niftydog

Ok, um, duh! <slaps forehead>

So, try this, leave a cable plugged into the input, but don't connect the other end to anything, and have nothing plugged into the output. If I'm right it won't work. But as soon as you plug in another pedal connected to the daisy chain it will spring to life.

It sounds as if the signal cables are providing the ground path (via the other pedals connected to the daisy chain) for the power supply. If so, this would mean the ground connection on the BDI is faulty.

I don't know if this helped OP or not, but it sure helped me about something I have been working on! Interesting point of view and a great example of thinking out of the box.

[JonathanD]

Originally Posted by niftydog

Ok, um, duh! <slaps forehead>

So, try this, leave a cable plugged into the input, but don't connect the other end to anything, and have nothing plugged into the output. If I'm right it won't work. But as soon as you plug in another pedal connected to the daisy chain it will spring to life.

It sounds as if the signal cables are providing the ground path (via the other pedals connected to the daisy chain) for the power supply. If so, this would mean the ground connection on the BDI is faulty.

+1.7

[Andy V.]

Originally Posted by niftydog

Ok, um, duh! <slaps forehead>

So, try this, leave a cable plugged into the input, but don't connect the other end to anything, and have nothing plugged into the output. If I'm right it won't work. But as soon as you plug in another pedal connected to the daisy chain it will spring to life.

It sounds as if the signal cables are providing the ground path (via the other pedals connected to the daisy chain) for the power supply. If so, this would mean the ground connection on the BDI is faulty.

Wow!
I'd never thought of that.

[Vic Winters]

BDI will power properly if plugged into the daisy chain and connected with other pedals. It won't if no other pedals are plugged into the daisy chain even in they are connected via patch cable.