What tubes are in the transport?
The worst culprits evidently are not giving you any difficulty. That would be the 6SN7s in the Cary preamp gain stages. I assume you have not rolled them. It is almost always a compromise between a very low moise tube and a better sounding but with some noise tube . That is if you accept the notion that old stock tubes sound much better in many ways. However they are supremely difficult to get noise free. If you have Old tubes in there already that are silent consider youself lucky.
The transport tubes it appears have been used a fair amount of time. Even if they were new production, they are now used and prone to old tube noise. Why not switch them out?
If you are using a common tube, that is in current production it might be a cheap and quick fix. I assume they are the 9 pin preamp double triode type tubes. Once tested for just working or not. The remaining working tubes are mainly quiet right off the shelf. Even yet they are not certainly quiet- not all- not ever I have been told by some dealers of new production. Read the RAM tube site.
I would get them pre tested for matching and noise. Several dealers offer noise testing but very few compared with the simple gain match which is almost a universal service.
Noise testing service is included in the price of Jim McShane Citation amp and tubes. His site is on the het or go over on Audio Asylum Tubes. Upscale Electronics Kevin Deal, Brente Jesse at audiotubes .net do it. .
I can attest for the names I mention like Jim Sautter here on the Gon. He goes almost overboard testing and I have bought from him. Just ask for what you want. He is verr honest, meticulous and very very fair. The only question is what he would have available. He specializes in old stock tubes and only on occasion has a current production lot to work from. His prices for truly tested selected older tubes are, as I said very fair and near what you might pay anyway.
I have no vested interest in any of the tube dealers at all just a customer.
The worst culprits evidently are not giving you any difficulty. That would be the 6SN7s in the Cary preamp gain stages. I assume you have not rolled them. It is almost always a compromise between a very low moise tube and a better sounding but with some noise tube . That is if you accept the notion that old stock tubes sound much better in many ways. However they are supremely difficult to get noise free. If you have Old tubes in there already that are silent consider youself lucky.
The transport tubes it appears have been used a fair amount of time. Even if they were new production, they are now used and prone to old tube noise. Why not switch them out?
If you are using a common tube, that is in current production it might be a cheap and quick fix. I assume they are the 9 pin preamp double triode type tubes. Once tested for just working or not. The remaining working tubes are mainly quiet right off the shelf. Even yet they are not certainly quiet- not all- not ever I have been told by some dealers of new production. Read the RAM tube site.
I would get them pre tested for matching and noise. Several dealers offer noise testing but very few compared with the simple gain match which is almost a universal service.
Noise testing service is included in the price of Jim McShane Citation amp and tubes. His site is on the het or go over on Audio Asylum Tubes. Upscale Electronics Kevin Deal, Brente Jesse at audiotubes .net do it. .
I can attest for the names I mention like Jim Sautter here on the Gon. He goes almost overboard testing and I have bought from him. Just ask for what you want. He is verr honest, meticulous and very very fair. The only question is what he would have available. He specializes in old stock tubes and only on occasion has a current production lot to work from. His prices for truly tested selected older tubes are, as I said very fair and near what you might pay anyway.
I have no vested interest in any of the tube dealers at all just a customer.