EAR 834P Phono stage. Buzzing sound

[MikeHit]

Newbie here.

My EAR 834P has recently developed a sort of buzzing sound half way between rapid soft clicks and a real buzz. Could this be valves needing replacing? I am not sure it is a ground hum but I could be wrong.
Also, on the back there is a screw terminal next to the output leads - is this for the ground wire (which I have been fixing to the small screw next to the fuse) or some other function. I have looked for manuals but cannot find any online.

Thankyou all in advance for your help

Mike

 

[Roger_A]

Newbie here.

My EAR 834P has recently developed a sort of buzzing sound half way between rapid soft clicks and a real buzz. Could this be valves needing replacing? I am not sure it is a ground hum but I could be wrong.
Also, on the back there is a screw terminal next to the output leads - is this for the ground wire (which I have been fixing to the small screw next to the fuse) or some other function. I have looked for manuals but cannot find any online.

Thankyou all in advance for your help

Mike

Why don't you contact EAR/Yoshino for advice? They still manufacture the 834 phono amp so should be able to suggest what to check or even to service the item if you want to do that depending on cost.

 

[daytona600]

Do you have a spare set of valves to Try out they do fail with age

 

[Al ears]

The screw terminal next to Output Right is indeed the earthing point

 

[DelClark]

I recently had a similar problem, thought it was my TT or amp on the fritz.
Long story short, it turned out to be my networking plug ins (no wifi in office computer upstairs).
Unplugged them and noise gone.
It took ages to find out what it was.
So now ordered a wifi dongle.

 

[gasolin]

it's old mabye it just need service

 

[DelClark]

I didn't discover the problem until I plugged it in on different circuit. Worth a try,,

 

[MikeHit]

The screw terminal next to Output Right is indeed the earthing point

I'm sorry for not replying sooner, but things have got ahead of me.
I moved the grounding cable to that terminal...no change. In fact, the sound is there even when the TT is not plugged in! So it sounds like it is the phono stage.

 

[Al ears]

I'm sorry for not replying sooner, but things have got ahead of me.
I moved the grounding cable to that terminal...no change. In fact, the sound is there even when the TT is not plugged in! So it sounds like it is the phono stage.

No problem.
What happens when the earth is disconnected completely?
If it's still buzzing I would look at replacing the valves next.

 

[Alex1969]

Try wriggling the valves around. Common EAR issue is the sockets they sit it. You may need to replace all 3 but bad connection on valves is the biggest issue with EAR.