Burning Amplifier BA-1

[tinitus]

Originally Posted by noSmoking

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

[noSmoking]

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.

[tinitus]

Originally Posted by Nelson Pass

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

Originally Posted by noSmoking

I fired it up and all is swell so far,lol. Thanks for the help!!!!!!!! no smoking today,LOL.

man you are fast

[Variac]

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.....

[noSmoking]

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!

[Variac]

Great that you're coming.
And that wasn't a sales pitch- I had forgotten just how cool the Burning Amp family is.

Mark

[Alettagla]

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

[Zen Mod]

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

[Alettagla]

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

[Zen Mod]

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