But does it have to work? If not, then I must have great peace of mind as assembly is finished.Assembly of Japanese bicycle require great peace of mind...........
Hi ZM, thanks for your advice and I find solusinya like this psu pcb picture attachment, For my teriodal 18-0-18edit: posted something thinking that I'm in Korg B1 thread
@rubah - do some general reading; everything needed to connect xformer and full wave rectifier, to end with single rail supply - I already posted in my previous post
problem with reading and learning is - you need to be aware of facts and dangers working with mains voltage ........ and with that necessary level you'll be able to understand posted schematic
if you can't recognize what primary is , you're crawling in dark, waiting for disaster to happen - injury or even death
so, in short - if you're not able to deal with mains voltage based build - use switcher brick supply, as majority of ACA builders are doing
Single rail full wave my xformer 18-0-18 to high volt after psu around 36v, to get 19v/24v i use regulator lm7819/24 + tip3055 to get stable 19v/24v - it good or not * zm?not good
that's twice half - wave rectifier
if you make bridge/short between two "+" at right side, then you'll have proper full wave rectification
and then you have just one "+", not two
Thanks u MZsolve first rectification properly, then you can do whatever you want with regulators
under load , from 18Vac you'll get something as 22Vdc to 24Vdc
36V you're mentioning are result of wrong rectification and wiring
so, no need for regs ...... nor you'll have voltage headroom to include one
take care of dots - there are connections; where no dot, no connection
Wow, this is my first experience with SE Class A and I am amazed at how good the sound is coming from my Heresys. No smoke from either amp or speakers, so that's a good thing. Currently running Spotify to my Schitt Modi 1 DAC directly into the ACA. No hum, dead silent with computer volume all the way up, that's a great thing. Running the volume on the Spotify app a little less than 1/3 rd of the way up with very good clean audio.If the amp is responding properly to the potentiometer adjustment, it’s likely good.
Even without any wiring problems, this is a somewhat "normal" kind of thing to happen with the ACA. Mine makes this same sound at turn on and the amp is only configured for single-ended input, no output bridging, etc. It's relatively quiet, but clearly there - my understanding is that it is related to the output filter cap charging up.When I powered it on, I heard this weird sound come from the left speaker, kind of like letting the air of a balloon.
The 'noise' (fart) is normal, you will get it every time you switch on in Stereo mode. It is mentioned in the build guide and numerous times in the thread...... I heard this weird sound come from the left speaker, kind of like letting the air of a balloon. At this point the left speaker sounded light, I doubled check and it is working, just not as loud as the right. I was checking connections and decided to flip the balance/stereo/mono switch to the full down position (currently in the middle where it reads stereo). Now the left appears to be as loud as the right. Could I have the Stereo/mono switch wired incorrectly? Could that be what caused the weird sound at the beginning? .....
Thanks, will bring Allen wrenches tomorrow, open up and double check R11 and R12.Switch wiring is fine for V1.8 build.
Switch can be either way up and no harm will be done.
Make sure your inputs are equal (you will be surprised how many one channel louder than the other problems is because of a faulty input) then check you have correct values in R11 and R12 (compare one side to the other if in doubt).