makepeace wrote:
Knowing that you're quite the amp builder, I am quite surprised to hear you're only starting to obsess about grounding now!
Oh I've been obsessing for years bro, but like i said, you always come across issues that "change your mind" so to speak.
I started the thread to see if others could benefit from mistakes i've made, (or others have made) over the years. Thats all, unless no-one cares ?
Gearhead wrote:
Was planning a bus for my next build, what's wrong with that BottledTone?
Nothing wrong! When the amp is done and there is no hum or hiss, it's perfect. Right?
I have just recently helped someone locally that had mad hum, and showed him some errors of his wiring, and thought a thread would help others before they build, to get it right first time.
makepeace wrote:
Cap board is going outside the chassis next to PT and choke and will heed your words about the HT. Could you explain in a little more depth perhaps as to why this is a good idea?
That wire from the CT winding (or wire from the negative side of a bridge rectifier) is carrying a large current, which is why it must only go to the first smoothing cap where it will be used, then the reference ground wire to chassis(or bus). This keeps the high current out of the rest of the amp grounds. The speaker wires must also both go straight to the output jack, where the speaker will use it, and then its reference ground wire can go to the point on the chassis where the first filter (smoothing)cap has a reference. Unless the amp has a negative feedback loop, in which it can be returned to the phase inverter ground.
