Anyone know how to solve the hum problem from SP10?

Hi DIY friends,

I builded my SP10 few months age, but I still can't fix the humming from it.
Anyone can share the experiences for solving hum problem for SP10 kit here, It must can help the people who bought it and with hum problem.


Thanks

Kapak,

Could you mind post ONE photo (top view) of your SP-10, I would like to take a look

KK.Ho

Kapak：先查看兩塊pcb的接地(有3處要接地)是否接通，如用銅柱鎖上在機箱接地的話先將機箱的孔位週邊的漆油刮走(如果用鐵機箱)，AC電源的水線接機箱也這樣做，看看是否有改善。

Hi losin: I was checked the pcb ground connections and rearrange the power connection for selector and output protector again, then I found the hum sound was decreased. Thanks

decrease =/= disappear.

Tell me how much have now ?

I try to help you solve it.

KK