So the preferred build on most projects would be to use the regulated supply. Hay, the board is smaller so it saves on G-10.
I don't know what G-10 is but i don't think you will save anything. You will still need a PSU or equivalent for the output stage.
Ah, i should have known. That is a common knife handle material as well.
BA 3 pre amp for F6
Just finished the F6 build with guidance from both SLS6 and Patrick; works and sounds great. Now am interested in building a pre amp for it- seems like the BA3 might be the way to go?
I recall the F6 has a "preference" for a certain range of output impedance and voltage in order to match well and drive it to the right output levels.
Any suggestions on if the BA3 is a good match and in what configuration is appreciated.
thanks
Just finished the F6 build with guidance from both SLS6 and Patrick; works and sounds great. Now am interested in building a pre amp for it- seems like the BA3 might be the way to go?
I recall the F6 has a "preference" for a certain range of output impedance and voltage in order to match well and drive it to the right output levels.
Any suggestions on if the BA3 is a good match and in what configuration is appreciated.
thanks
BA-3 will work beautifully, as will Wayne’s BA2018 linestage.
Output power is ultimately limited by rail voltage, so higher voltage will give more power.
However, the voltage limit on this circuit is the input Jfets, and they are technically rated at 25V, though Papa says you can go a little higher... so increase voltage at your own risk. My example has 31V rails and Toshiba Jfets and I have not had any issues.
However, the voltage limit on this circuit is the input Jfets, and they are technically rated at 25V, though Papa says you can go a little higher... so increase voltage at your own risk. My example has 31V rails and Toshiba Jfets and I have not had any issues.
I used a 1000VA 24/24 volt Sumr transformer. I think my rails were 31 or 32ish. I have spares if they roast.
If really worried, you could cascode them. I intended to do this with the parts recommended for Turbo F5.
Never saw the need.
Russellc
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Another BA3 is born!
Initially started with 0A5 bias with 6 devices per channel. More fun to come.
As always, a heartfelt thank you to Papa, 6L6, ZM and the countless others that have made this possible!
I'm still not thrilled with the wire routing. I have a few tidbits to tend to, but it's alive - dead quiet and making music.
#protip - make sure to ground the front end. Ask me how I know...
Initially started with 0A5 bias with 6 devices per channel. More fun to come.
As always, a heartfelt thank you to Papa, 6L6, ZM and the countless others that have made this possible!
I'm still not thrilled with the wire routing. I have a few tidbits to tend to, but it's alive - dead quiet and making music.
#protip - make sure to ground the front end. Ask me how I know...
