Hi,
I've posted power amp pcb of this project (P27 from ESP) here. And I have to admit I barely understand the tricks in circuits let alone knowing how to design one properly.
Anyways. Since I'm going to have these built for like 10$ in China I decided to do the preamp as well since the marginal cost is quite low (shipping cost is constant unless you order huge amounts) It seems preamp is likely to turn better since there aren't boatload currents flowing to create strong enough fields to induce unwanted levels of noise/feedback/loops.
Disclaimer: I'm a newb at this and trying things out in my spare time. I mean no harm to Mr Elliott's business and am here to seek advice & share my (hopefully decent) design. I can and will take these off if it upsets the original creator.
It's attached below. Any idea is welcome. Thanks.
I've posted power amp pcb of this project (P27 from ESP) here. And I have to admit I barely understand the tricks in circuits let alone knowing how to design one properly.
Anyways. Since I'm going to have these built for like 10$ in China I decided to do the preamp as well since the marginal cost is quite low (shipping cost is constant unless you order huge amounts) It seems preamp is likely to turn better since there aren't boatload currents flowing to create strong enough fields to induce unwanted levels of noise/feedback/loops.
Disclaimer: I'm a newb at this and trying things out in my spare time. I mean no harm to Mr Elliott's business and am here to seek advice & share my (hopefully decent) design. I can and will take these off if it upsets the original creator.
It's attached below. Any idea is welcome. Thanks.
Attachments
You cant really go wrong with that pre amp circuit.
Its low current so ground loops aren't such a big problem.
Things get more complicated when a rectifier and smoothing caps are on the same pcb.
The charging impulses into the smoothing caps can modulate the ground and cause hum.
Its low current so ground loops aren't such a big problem.
Things get more complicated when a rectifier and smoothing caps are on the same pcb.
The charging impulses into the smoothing caps can modulate the ground and cause hum.
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