advertisement


A Baby A Class HP Amp/Pre FOC

CJ14

O.H.
A Baby A Class HP Amp/Pre FOC.
This little beast is a little complex but I suspect you can do it.
The Gerber will be available on my SECA data store.

201299586_2599937216975870_3533999216814081470_n.jpg


200670049_2599937280309197_2405538939665959297_n.jpg


202160135_2599937326975859_2743645523375813468_n.jpg


201776012_2599937353642523_824773775425206168_n.jpg


Gerbers here:--https://seca.freeforums.net/thread/312/baby-class-amp-pre-foc
 
Nice.

What's that, about 65mA standing bias, single-ended? Enough to drive even 32ohm cans to c.60mW, which should ensure deafness.

(nb for those watching even into a classic, not-so sensitive headphone like the AKG701 at c 60ohms - which I've a lot of time for - back of envelope suggests min 112dB within class A without clipping. Ouch)

To my taste - the gain of 10x might be a bit high though for line level sources..? R13 / R27 can always be reduced though (to 1k for a gain of 2x /6dB )
 


advertisement


Back
Top