Is it possible to use the BA-3 front-end as a pre-amp? I think I read it can, but can't find the reference.
Has anyone used it as pre-amp and do you have any impressions on the sound? I'm currently using a BOZ-J and would like a bit more drive for a bi-amp setup running the L'amp CCS and a F5.
Thanks,
Vince
Note:
If using Fairchild mosfets, use 1K variable resistors for P1 and P2.
Volume control- 20K to 50K
Has anyone used it as pre-amp and do you have any impressions on the sound? I'm currently using a BOZ-J and would like a bit more drive for a bi-amp setup running the L'amp CCS and a F5.
Thanks,
Vince
Note:
If using Fairchild mosfets, use 1K variable resistors for P1 and P2.
Volume control- 20K to 50K
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Here is a link to someone who built one as a preamp > http://www.diyaudio.com/forums/pass-labs/196857-between-f4-f5-3.html The details are vague at best !
ZM said that.
Look for post1029 and post 1031here:
www.diyaudio.com/forums/pass-labs/86300-ugs-adventures-103.html
Look for post1029 and post 1031here:
www.diyaudio.com/forums/pass-labs/86300-ugs-adventures-103.html
It was the intention of the people starting with the Burning Amp series that the Burning Anp should be used in a modular way means mixing allowed of frontends and outputstages, wasn't it Mark himself mentioning this...
I look for the sources...🙂
I found it....
http://www.diyaudio.com/forums/pass-labs/201281-burning-amp-ba-3b-balanced-34.html#post3175072
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I keep seeing mention of the BA-3 as a balanced pre, but the schematic under the board us single-ended.
all you need is there : http://www.diyaudio.com/forums/pass-labs/201281-burning-amp-ba-3b-balanced.html#post2739404
along with explanation for "simple" (SE) BA3 FE : http://www.diyaudio.com/forums/diyaudio-com-articles/194809-burning-amplifier-ba-3-a.html
scroll down the page , read my longish comment , where I ( as usually
) made all work ( no money , no glory 
) , correcting differences between sch. nomenclature and Pa's explanation
along with explanation for "simple" (SE) BA3 FE : http://www.diyaudio.com/forums/diyaudio-com-articles/194809-burning-amplifier-ba-3-a.html
scroll down the page , read my longish comment , where I ( as usually
) made all work ( no money , no glory ) , correcting differences between sch. nomenclature and Pa's explanationI suppose you would want to have seperate attenuators for each channel/amp
juma have shown a jboz like input with B1 like output
might work for biamping
or maybe consider active xo
I'm using a 2-way active crossover (MOX II).
I find the JBOZ a bit light. I really like it, but it needs a bit more push.
Sounds to me that the BA-3 pre has that extra push.
I also have a B1 in the house. It's connected to another system.
ZM, on first look, it seem there is'n't much changed between the two halves.
Should be easy to do.
Should be easy to do.
it isn't changed , "except" introducing bridge resistor ( each halve serving as virtual gnd to other one)
be sure to have bleeder resistors after output caps ; as drawn , FE is part of amp itself , so they aren't necessary
when stage used/packed standalone , they must be implemented
be sure to have bleeder resistors after output caps ; as drawn , FE is part of amp itself , so they aren't necessary
when stage used/packed standalone , they must be implemented
Any issues putting a B-1 in front of a BA-3 for a complete preamp with volume control and input selector?
B1 ( at least active part - buffer itself ) is redundant in that case
Jfet input is having input impedance dominated by value of resistor from gate to GND , in both cases - B1 and BA3 FE
Jfet input is having input impedance dominated by value of resistor from gate to GND , in both cases - B1 and BA3 FE
OK. Just need a simple board for volume POT and selector and relays for input selection. Any opinion best way to mount these components? Prototype perfboard? Want to keep it neat and pretty.😎
bnorrish- Relays? That seems complicated. A rotary switch for input selection would be much easier.
After reading (links ZM posted) I have a question: As ZM told for the FE application you need bigger voltage swing, so like ~30V rail, but people are suggest to power BA-3 from the same PSU they use for F4. Will a separate PSU which give ~30V rail be suitable for either applications of BA-3: FE(for F4) and preamp other FW amp?