My PH 14 has a hum that I can't find help.
Last edited by Jim on Mon Jul 03, 2023 2:32 pm; edited 1 time in total
2 posters
PH 14 phone amp hum
Jim- Posts : 6
Join date : 2023-02-16
Last edited by Jim on Mon Jul 03, 2023 2:32 pm; edited 1 time in total
Rec- Posts : 77
Join date : 2020-03-11
Did you just build it or did the hum just appear. For me it was grounding. There is a ground point on board near c21, I used the other ground point on the board. This connects all grounds to chassis vs let ground of preamp circuit float through c21.
Jim- Posts : 6
Join date : 2023-02-16
I just build it. do have ph 14 v2.0 board blue in color can't find my manual .
Rec- Posts : 77
Join date : 2020-03-11
Look for another eyelet on board called GND near power supply and ground to that point.. I have no idea what rev board I have. C21 is small poly near input section of my board.
Jim- Posts : 6
Join date : 2023-02-16
I know the spot thanks
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