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Old 15th July 2012, 12:35 PM   #251
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by noSmoking View Post
Hi Tinitus,
All N boards
that would be BA1 boards
seems like it could also be used for BA3, if you want a SE BA3

each board designed/wired to build a mono amp, one output board for 1 mono amp
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Old 15th July 2012, 05:53 PM   #252
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Hi Tinitus,
I went back and read the whole thread ,you were right Ba1 boards all 240's with N on them and the BA 2 boards with alternating locations for N and P ,I fired it up and all is swell so far,lol. Thanks for the help!!!!!!!! no smoking today,LOL.
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Old 15th July 2012, 09:37 PM   #253
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Nelson Pass View Post
Here's what the output stage looks like with the front end removed. It
contains the components to bias it.


hey, that is thanks Nelson
me like to hardwire that one

Quote:
Originally Posted by noSmoking View Post
I fired it up and all is swell so far,lol. Thanks for the help!!!!!!!! no smoking today,LOL.
man you are fast
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Old 15th July 2012, 10:56 PM   #254
Variac is offline Variac  United States
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We really should all make a Burning Amp with both kinds of output stages. Then we'd know what we're talking about vis a vis single ended vs. complementary sounds-wise.

kinda.....
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Old 16th July 2012, 04:08 AM   #255
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Hi Variac,
I will order the boards for a BA 2 output stages soon so I can hear both worlds and see! Thanks for your input,
I hope to make BA this year ,I hope to stay a few days and see the city!
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Old 16th July 2012, 05:36 AM   #256
Variac is offline Variac  United States
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Great that you're coming.
And that wasn't a sales pitch- I had forgotten just how cool the Burning Amp family is.

Mark
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Old 4th October 2012, 01:46 PM   #257
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Default 1ohm 3w resistors in ba-1

Hello everyone,


Just a quick question about the 1ohm 3w resistors in ba-1 (for with use with ba-3b)


Can I use wirewound resistors
Do they have to be matched

Your advise is very much appreciated
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Old 4th October 2012, 01:57 PM   #258
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yes , you can

match them if you can

one of possibility is with small precise CCS (5-10mA , small Jfet or anything what you already have in drawer) measuring voltage across resistor; then all you need is to compare voltage readings
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Old 4th October 2012, 02:35 PM   #259
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Default mathing resistors amp layout etc

Thanks,

How precise does matching have to be done? Would within 2 percent be sufficient?


Heres's another question

the idea is to build balanced version of ba3 to serve as frontend with powerstage of ba1 (thats the single ended version).

I will build two mono chassis. Each chassis has heatsinks on left and right side.

Am I correct saying that al upper side mosfets (from in fact two ba-1 powerstages) go together on one heatsink and al downside mosfets go together on the other heatsink?

Your advice is again much appriciated

Last edited by Alettagla; 4th October 2012 at 02:38 PM.
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Old 4th October 2012, 02:46 PM   #260
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let's just say thjat you'll have them matched more tightly , if you buy 50% more than you need

regarding heatsinking/grouping - make them in a way which leads to tidier wiring
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