ofcourse that will make one channel silent ... thats why i asked about bridging ... with a simple alteration in input topology a balanced channel can be driven by a se source much more effective and now wasting the silent channel's bias and capability.
let me understand that right: If we drive two Ba3 amplifier channels bridged feed by an unbalanced source; there is no extra swing hence no extra power?
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repost sorry
======================
hello,
can we make this ba3 preamp into an amplifier using 2sk1058 2sj162 device
simply by changing the value of some parts and increase the bias current?
biased at 1.2A 25v 30watt, device Pd rated max 100watt.
please advice.
======================
sorry for repost, i've posted at wrong thread before.
thanks 6L6.
======================
hello,
can we make this ba3 preamp into an amplifier using 2sk1058 2sj162 device
simply by changing the value of some parts and increase the bias current?
biased at 1.2A 25v 30watt, device Pd rated max 100watt.
please advice.
======================
sorry for repost, i've posted at wrong thread before.
thanks 6L6.
Attachments
if we put nfb then it will become 100% F5 amplifier
isn't that BA3 is about no feedback amplifier?
thanks.
horses for sources...... for courses 
BA3 is having source follower (common drain , even if dummy ZM is always confused with that "common something") OS , which alone is having pretty low Rout
what you're proposing is having common source arrangement of output mosfets ,so wimpier ....... and always needing help of NFB to lower resulting Rout
if you want to mimic lousy made toob gadgets , just make lousy made toob gadget
no need to mimic it with sand , bashing how you made something new
though , your pleasure is always your own first , so don't let anyone spoiling it .....
BA3 is having source follower (common drain , even if dummy ZM is always confused with that "common something") OS , which alone is having pretty low Rout
what you're proposing is having common source arrangement of output mosfets ,so wimpier ....... and always needing help of NFB to lower resulting Rout
if you want to mimic lousy made toob gadgets , just make lousy made toob gadget
no need to mimic it with sand , bashing how you made something new
though , your pleasure is always your own first , so don't let anyone spoiling it .....
ok, i see.
maybe i should try to build and hear it my self
it's worth to try for me, at least for learning
btw Q3 Q4 are reversed from previous schematic,
the BA3 output Q3 should be Pch, and Q4 should be Nch.
and also i attached another schematic, i think it might be entertaining too,
maybe can call it folded ba3 or flipped output ba3?
or maybe don't have related with ba3 at all? no offend please
i'm only a noob with very little experience..
and i don't know yet whether it will work or not as an amplifier..
please some advice.
thanks.
maybe i should try to build and hear it my self
it's worth to try for me, at least for learning
btw Q3 Q4 are reversed from previous schematic,
the BA3 output Q3 should be Pch, and Q4 should be Nch.
and also i attached another schematic, i think it might be entertaining too,
maybe can call it folded ba3 or flipped output ba3?
or maybe don't have related with ba3 at all?
no offend pleasei'm only a noob with very little experience..
and i don't know yet whether it will work or not as an amplifier..
please some advice.
thanks.
Attachments
eliminate source resistor, I see...
but I think it will be easier to look at bias if resistors are there.
right schematic (that folded one) ...... no workie ....... at least my 2 cells can't fold it enough to see it working
Is it because of that lateral mosfet? (wrong bias circuit)
Will it working if using 2sk2013 2sj313 or irfp9240 irfp 240 devices?
Thanks.
no Bubba
which way you think to squeeze normal Iq for stage like that?
it is late/early in my neck of wood , but I can't see that possible with these resistor values
not even counting that you can't modulate output mosfets via source ....... I mean , you can , but for that you need complete amp modulating output mosfets
which way you think to squeeze normal Iq for stage like that?
it is late/early in my neck of wood , but I can't see that possible with these resistor values
not even counting that you can't modulate output mosfets via source ....... I mean , you can , but for that you need complete amp modulating output mosfets
depends what you mean with Spooky
with amps , SITs are Spooky (SIT 1, SIT 2, SIT 3, amp you posted about .....)
with preamps , Spooky for me is Iron Pumpkin
though , completely different Spookiness than with amps
so , maybe Mr. Rothacher's Sony VFet preamp ........ can't remember its name now ......
with amps , SITs are Spooky (SIT 1, SIT 2, SIT 3, amp you posted about .....)
with preamps , Spooky for me is Iron Pumpkin
though , completely different Spookiness than with amps
so , maybe Mr. Rothacher's Sony VFet preamp ........ can't remember its name now ......