I noticed that a certain "warm up time" was necessary with certain tubes (my RFT ECC88 require at least 1 minute) before it output sound, but I suppose you're trying with the 6N11 tube and that you've aleady tried to wait a little time.
Maybe a bad unit, bah, ****s happens !
I'm pretty sure that Henry will help you
Great guesses guys. I took a pic of this tube in the amp. It's a late 50s Amperex 6922 PQ pinched waist D getter with gold pins. I wonder how this compares to a CCa. I read that the CCa and pinched waist Amperex are the best in this tube type. I can't wait until the amp and tube is burned in. I only have about 30 hours on it so far. My last tube to test is a 6dj8 PQ A frame which should sound good as well.
^^ Yeah I am too ! I was waiting for over 1 month for this amp. I ended up getting 2 tubes for this amp also. And after all that waiting when I found out that the amp did not work I was extremely disappointed.
I am now hastily writing another message to Henry so that he knows that the amp has started working and I am very happy with the sound.
Originally Posted by 22B /img/forum/go_quote.gif Great guesses guys. I took a pic of this tube in the amp. It's a late 50s Amperex 6922 PQ pinched waist D getter with gold pins. I wonder how this compares to a CCa. I read that the CCa and pinched waist Amperex are the best in this tube type. I can't wait until the amp and tube is burned in. I only have about 30 hours on it so far. My last tube to test is a 6dj8 PQ A frame which should sound good as well.
The A Frames I have are the best sounding tubes so far. Though my D getter PCC88 is in the mix, too. I don't know if anything would sound better than a pinched-waist, though. That tube type is just legendary... Epic!
Any experience with Electro Harmonix 6922 out there?? I also have a Phillips JAN 6922 on its way. Of course the amps not here yet!! But, I will try both of these against the stock tube.
My old bugle boy makes the amp put out alot more heat then when using the other tubes, it also seems to take longer to heat up. i wonder if the new tubes are just more efficient, heh.
Also by the way my Amp started shorting out, happened to me twice, i think its the power cable/unit itself is the DC power supply universal with anything i can pick up here in the states since i know other users reported issues with it as well
Yeah...I have had a look and the Power Supply is okay. It must be one of the 2N3906's are bad.
Hoping for a replacement from Henry. Shot him an email, maybe I will get a reply tomorrow. I too had already bought some nice 6922's that I had sitting here, ready to try out.
Yes the power supply is definitely a bit iffy. One end of mine is a bit loose and I will have to take care not to strain it as it will in all probability snap if I pull it with some force. But Henry is a really nice person to deal with and I have no doubt you will be satisfied with the amp in the end. I am really enjoying mine right now.
About the best upgrade you can make for the Bravo is to replace the cheap 1A switching power supply with a better quality 2-2.5A switcher or regulated supply. We did an A-B test with mine a recent mini-meet and the better quality 2A supply sounded much better.
Using a larger power supply will not harm the amp.
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