Burning Amp BA-3

[Zen Mod]

do you know output impedance of La Drek Vecteur ?

Pearl (if I'm looking at proper schematic) could be (almost ) happy to drive 10K pot

 

[Abx74]

Unfortunatly no... anyway I will try and see...

Thanks Zen Mod

 

[Abx74]

Hi, my CD player seems to be happy driving a 10ko pot.
I use now a TKD 2CP2511 insteaf of a Tocos RV24... what a gap !

Damien

 

[wengtech]

hello,
i just curious how will the sound be, if we connect the sony vfet pt.2 front end
with ba3 output stages, would it be a better burning amp?? 😀

is it possible to wire like the schematics below?
(sorry for quick and dirty draw)

thanks.

 

[wengtech]

Sorry

There should be no feedback for ba3 output
So i think the feedback connection from vfet front end should be disconnected.

 

[luvdunhill]

I think my output stage could implement this directly, I should check. You would need to use TO-3 devices, but the bias circuit from the VFET amplifiers should work just fine.

 

[6L6]

If the BA-3 front end was cascoded, you would have essentially what you've drawn.

 

[MASantos]

If the BA-3 front end was cascoded, you would have essentially what you've drawn.

Doesn't the BA3 front end have higher gain than the sony vet FE?

 

[Itsmee]

sony vfet pt.2 front end with ba3 output stages, I think you would need to cap couple the the stages together

 

[qwertyl]

BA-3 power supply almost ready

 

[MASantos]

Those are some beefy diode bridges!!!

 

[qwertyl]

Usual diy audio overkill 🙂

 

[6L6]

Looks very nice!

 

[qwertyl]

Looks very nice!

Thanks 🙂

 

[qwertyl]

Some progress over the weekend...

 

[Blitz]

Currently I am running besides my tubeamps, a F4 (balanced/bridge dual mono blocks) and a F5Tv1.

The F4 are a bit unpractical for my setup, I need gain. So, what would you suggest ?

I am thinking to cripple the f4 so that they basically are like the ba-2 output and have the Ba-3 directly driving them. The key question: Go with a balanced / bridged setup again, so using one stereo ba-3 in balanced mode to drive two crippled f4 bridged ? Or parallel the output-boards and have a "normal Ba-3" ?

 

[6L6]

Make a Balanced BA-3 front end into a preamp. That will have enough gain to drive the F4 to clipping. 🙂

Drive the F4s with that preamp. Don't cripple the F4, they sound the same wether the buffer is there or not.

 

[Blitz]

So, your BA-3 sounds identical to your F4+Ba-Preamp ?

 

[Itsmee]

Make a Balanced BA-3 front end into a preamp..

Don't forget about ZM's pumpkin.

 

[6L6]

Of course!

Or SY's Impasse.

All good choices, I suggested the BA-3 bal as he was already thinking about it.