Bottlehead Forum

Bottlehead Kits => Eros Phono => Topic started by: Alby0521 on February 03, 2020, 03:14:13 PM

Title: Eros capacitance
Post by: Alby0521 on February 03, 2020, 03:14:13 PM

Hello

I’m using a Goldring 1042. It seems it requires 150 to 200pf of capacitance.

The tonearm cable is a direct run from the pin of the headshell to the rca connectors. In total the length is 5ft and the capacitance of the cable itself is 10.62 pf/ft.

The cable RCA connectors are Neutrik Rean NYS373 of which I can’t find the capacitance anywhere (I read that a standard gold plated male RCA can be considered about 7pf).

Would you be able to tell me what pf is my cartridge seeing?

Thanks in advance.

AB

Title: Re: Eros capacitance
Post by: Paul Birkeland on February 03, 2020, 03:44:48 PM

So two RCA plugs give 14pF, the cable gives 55pF, so you're up to 69pF.  The input capacitance of the Eros is really low, I'd say 5pF is probably in the ballpark.

You could try adding a 120pF cap across each jack (easier to install them across the 47K input resistors though) to see if that makes much of a difference.

Title: Re: Eros capacitance
Post by: Alby0521 on February 03, 2020, 04:02:12 PM

Thanks Paul!

Best

AB