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Bravo Audio - funny looking little tube amps - Page 174

post #2596 of 2599
Quote:
Originally Posted by mcandmar View Post

The amount of time the led runs really depends on the amount of capacitance in the power supply and the current the LED consumes.  What power supply are you using?

It's the stock PS: Juyn 24V 1.5A switching

But like I said, it does this even if it's not plugged into the power supply.
post #2597 of 2599
Quote:
Originally Posted by rwpritchett View Post

Hello all,

I've been a V1 owner for about a month now and I've rolled about a dozen tubes so far. I've balanced the left-right pots to ~13.5V. Two quick questions:

#1 Is it normal that the blue LED remains lit after powering off the amp?

#2 I get a slight buzzing in my left channel when music is not playing. It's probably there while music is playing too, but gets drowned out by the other sounds coming through. What component causes this and any recommended fixes?

BTW, some tube notes: my favorites are a 1970 Amperex orange globe A-frame and a 1985 6N23P Voskhod Rocket logo, ECC86 works in this amp, ECC85 does not work

As for the recommended 13.5v, I use that as a starting point but all my tubes were different as to which voltage sounded best. Left and Right were never the same either.

post #2598 of 2599

I have a Bravo V3 and it's stopped working. I was wondering if you fine folks could help me out a little.

 

Firstly it started to turn off and on really quickly, the tube was flashing, I thought maybe the power plug was loose, yet it was not.

I re-seated the the tube a few times and then it was working for a bit, the tube was light up for half and hour but I didn't test any audio output.

 

It started to flash a little more so I re-seated the tube once more, but then it wouldn't light up. I tested the V3 without the tube and the LED were

still lighting up. But eventually after more testing the LED don't light up any more.

 

I've ordered a replacement tube, but I have a feeling something on the board has gone faulty instead.

Any one have any ideas?

post #2599 of 2599
Quote:
Originally Posted by rwpritchett View Post

Hello all,

I've been a V1 owner for about a month now and I've rolled about a dozen tubes so far. I've balanced the left-right pots to ~13.5V. Two quick questions:

#1 Is it normal that the blue LED remains lit after powering off the amp?

#2 I get a slight buzzing in my left channel when music is not playing. It's probably there while music is playing too, but gets drowned out by the other sounds coming through. What component causes this and any recommended fixes?

BTW, some tube notes: my favorites are a 1970 Amperex orange globe A-frame and a 1985 6N23P Voskhod Rocket logo, ECC86 works in this amp, ECC85 does not work

 

#1: Yes. I have two V2's and both do this. It's perfectly normal.

 

#2: Only one model of the Bravo amps has any shielding at all, and the V1 definitely has none. So it is a magnet for RFI. You probably have a transformer or other electronic device too close to the amp. Move things around while listening to the amp and you'll find a spot where it goes away. If that doesn't work, then you most likely have a bad cable somewhere.

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