How to replace volume pot in Dynaco Pas

Resistors are dirt cheap, most use metal film, but some prefer carbon. There are many Dayton branded caps, but unless you need high values, the only ones that I would use are the tin foil jobs. The Russian K40, not K42, can be purchased direct from Mother Russia on ebay, just check the dimensions first.

Regarding the Dynaco Doctor image: is this mod to bring the RIAA curve closer to spec?

As for the caps: what voltage should the phono board caps be?
I am thinking of doing the Dayton foil caps.Good price and easy (1 day) delivery.

e

I looked up Orange drops online and I must not have them because mine are redder than what they show. I can't see anyone's name on them.Also I would say that this pre doesn't have a harsh bone in it's body.

I noticed on the Dyno Doc's image what looks like a 470pf shunt on the 2200pf (flat looking)caps.Is this right?

e

No, the 470 is not a shunt on the 2200, the value that was needed is not common, so Joe is just building the 2670pf that he needs for the circuit. The purpose of the mod is two fold. First, the original circuit was +-3db or so, this tightens it to +-.3db so it is much more accurate, second it replaces the old parts on the board that have probably drifted, old carbon comp resistors often drifting upward in value and caps leaking. It also replaces the old parts with much more high performance modern parts and it necessitates that the volume pot be switched to 100K. That's more than two I guess. The RIAA caps are low voltage.

BTW, the Dayton caps only come in the values needed for the coupling caps, not the RIAA caps.