Marantz 2245 phono static/hum

[Legba504]

I have just bought my first vintage receiver, a beautiful marantz 2245! It is hooked to a U turn orbit turntable and a pair of Klipsch RB 61 bookshelfs along with a Polk sub.
I love the sound of the setup, but am getting a pretty good amount of hum or static from the phono stage. This occurs no matter if the turntable is hooked up or not. I assume I may need to ground the receiver but cannot ground to the U turn as they are self grounded and not designed to accept a grounding wire.
Should I just ground my receiver to an AC outlet ground? Do I have a problem with the phono stage?
Thanks in advance.

 

[Chrisxo55441]

have you tried taking the sub out of the set up ? you can try plugging the table into the receiver also

 

[Legba504]

I plugged in the TT to the back of receiver and it may have helped a little. The sub being included doesn't seem to matter.
I just hope there is not something wrong with the phono inputs on the receiver as I just bought it, but it is an old vintage receiver.

 

[Chrisxo55441]

It hums with both turntable and sub disconnected and only when phono is selected is that correct

 

[Legba504]

That is correct. Only on the phono. The sound is different if the TT is hooked up though. It is more of a static at high levels of volume with nothing hooked up more of a hum with the TT hooked up.

 

[Chrisxo55441]

The 2245 phono section is known to have transistor issues with the originals thats probably the problem. Im not a tech guy but im sure one will chime in soon and can give you some advice.

 

[Chrisxo55441]

congratulations on your first vintage receiver , the 2245 was my first receiver but it wasnt considered vintage when i got it in 1975 , its also my favorite. If yours is still original its probably due for some servicing and maybe a recap, the electrolytic capacitors have limited life and 40+ years is getting up there.

 

[Chrisxo55441]

i just noticed this thread is in solid state maybe why no one has chimed in, you would have better luck posting this in the marantz forum, maybe you can get a Moderator to move it