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Burning Amp BA-3
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Old 23rd April 2012, 07:10 PM   #741
flg is offline flg  United States
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Remember, I'm not the one who spec'd 25V for C1 & C2. I'm just wondering where everyone else was, including N.P. with this. I would not really expect to see more than 6V on the 100 and the pot||cap together. You need about 1V on the source R, 2Volts Vgs add some signal and mabe thats 2 more volts, and a little more for when the drive gets tough. But it's a pre. So a 6.3V might work but I'm not goin there. A 10V at min and I think thats doable. My 16V caps are 12.5mm and they fit but my 25V caps are all 18mm!
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Old 27th April 2012, 07:16 PM   #742
Backbones is offline Backbones  United Kingdom
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I used the 1000uF, 25V Silmic II and you are quite right, they don't fit. Doesn't look good but they sound just fine.
I had the same problem with the Silmics on the BA-2 board.
I'm getting used to my boards looking like Stone Henge.
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Old 28th May 2012, 04:11 PM   #743
ra7 is offline ra7  United States
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Hey guys, I'm at a point where I need more gain in my system, especially for the digital front end. So, I'm thinking of adding the BA-3 at the output of the DCB1 (the current pre). My question is, can the BA-3 be used this way? From what I can tell, its output impedance is about 300 ohms and should be fine as a standalone preamp into amps other than the BA series.
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Old 28th May 2012, 04:12 PM   #744
Zen Mod is offline Zen Mod  Serbia
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Burning Amp BA-3
standalone , yeah

that means DCB1 will be redundant
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Old 28th May 2012, 04:19 PM   #745
ra7 is offline ra7  United States
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Yeah, but I'm thinking of just stuffing it in the same chassis... you know how much work a new chassis is.

I think I'll keep the DCB1.. it allows many inputs and does a good job of buffering the sources... Planning to put a switch to flip the BA-3 in and out of the system. I really don't need the gain for the analogue source (Pearl II).
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Old 28th May 2012, 04:20 PM   #746
buzzforb is offline buzzforb  United States
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Beyond its output impedance, it has su stantoal drive current, having no problem driving the BA output with an input Z of about 7500, if I remener correctly.
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Old 28th May 2012, 04:23 PM   #747
Melon Head is offline Melon Head  Australia
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What would be cool, is if Salas came up with a hot rodded BA3 front end with one of his power supplies.
Then put the output stage in separate case with its own supply (eg CRC).
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Old 28th May 2012, 04:27 PM   #748
buzzforb is offline buzzforb  United States
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BA3 is my current favorite amp. Some diodes in the output seem a novel concept.
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Old 28th May 2012, 04:31 PM   #749
Melon Head is offline Melon Head  Australia
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Yeah baby
Try also upping the bias current on 2sk2013/j313
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Old 28th May 2012, 05:07 PM   #750
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