dirtyblues
Member
Hi,
A couple of years ago I repaired a C4 with the help of this forum, specifically Avionic, who patiently guided me through the project. Thanks again.
This is a great sounding preamp that I've been using daily. Recently, the phono stage started making noises. Not the usual hum, or constant noise, but this:
https://drive.google.com/file/d/0B4QrjBON6BBbS18tNVhtR09tZFU/view?usp=sharing
Sorry about the bad recording, this is done with my phone.
This noise is present on the 3 phono inputs, although it sounds a bit different on the MC one. It is present whether I have the turntable plugged in or not, it doesn't start straight away when I power up the preamp, but generally starts after 1min. It is also intermittent, It sometime stops for 5-10 seconds then starts again.
Any idea what could cause this?
A couple of years ago I repaired a C4 with the help of this forum, specifically Avionic, who patiently guided me through the project. Thanks again.
This is a great sounding preamp that I've been using daily. Recently, the phono stage started making noises. Not the usual hum, or constant noise, but this:
https://drive.google.com/file/d/0B4QrjBON6BBbS18tNVhtR09tZFU/view?usp=sharing
Sorry about the bad recording, this is done with my phone.
This noise is present on the 3 phono inputs, although it sounds a bit different on the MC one. It is present whether I have the turntable plugged in or not, it doesn't start straight away when I power up the preamp, but generally starts after 1min. It is also intermittent, It sometime stops for 5-10 seconds then starts again.
Any idea what could cause this?