I have just finished a PP EL84 amp, with most connections there is no hum at all at full power - dead silent with my CD player. But with my RP-1 there is quite a bit of hum, and increasingly more when I move the arm closer to the centre of the deck.
There is no ground wire, I believe the ground goes down the tone arm in the RP-1. So I am not too sure what might be the issue. Like I mentioned the hum gets louder as the arm moves closer to the centre, maybe because of the motor.
Any tips?
Cheers
Charlie
There is no ground wire, I believe the ground goes down the tone arm in the RP-1. So I am not too sure what might be the issue. Like I mentioned the hum gets louder as the arm moves closer to the centre, maybe because of the motor.
Any tips?
Cheers
Charlie
Perchance are you using a Grado cartridge? It's a known issue. Search for "grado hum rega" and you'll get the background.
It's not an absolute problem - I have an old Planar-2 with a newer RB250 and a Grado Blue and the hum is almost non-existent. But I also run the motor at a lower voltage than standard.
-bill
It's not an absolute problem - I have an old Planar-2 with a newer RB250 and a Grado Blue and the hum is almost non-existent. But I also run the motor at a lower voltage than standard.
-bill
For reference.
My record player has been on the shelf below my amp. When moving the deck around the room the hum disappeared, so I guess it is the PS choke or transformers causing interference?
Deck is now happily away from the amp, and probelm solved... for now.
Charlie
My record player has been on the shelf below my amp. When moving the deck around the room the hum disappeared, so I guess it is the PS choke or transformers causing interference?
Deck is now happily away from the amp, and probelm solved... for now.
Charlie
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