Tube rolling for the Cary SLP 2002

When that preamp first came out it was equipped with the 6H30 as standard. I can't remember now but I think that the 6H30s gave it more gain.

I don´t have experience with the Cary 2002, but I tried many 6922 tubes in my SF preamplifier.
As I know if you want more tubey and warm sound try NOS 6922 tubes (Amperex PQ, Siemens, Valvo...) but if you prefer more neutral sound try the 6H30, probably the 6H30 DR work better than the standard 6H30.

6H30 tube has less gain than 6922. Notice that many 6H30 preamps use multiple tubes to achieve high gain.

Amperex BB 6dj8 in gain stage and RCA 2 mica 5814 BP in output stage will give plenty of warmth.

Interesting thread and sorry in advance for the tangent. I just got my SLP-2002 back from Cary. I actually sent it for repair - was getting loud popping/scratching noises after 15 minutes. They checked it out and said the 6922s were bad and I they did the gain reduction mod and added Jensen caps while it was there.

I am not getting the loud popping noise now, but I do notice a very light variable static on the right channel. Hard to describe, but the left channel has a more consistent low noise. Both can only be heard within 4-5 feet of the speakers. Running an Anthem a-5 amp, balanced connections, and Sonus Faber GP Home speakers.

I am running new Cary EH 6922s and some NOS 12AU7s for the buffer. I was just getting ready to pull the trigger on some 6H30s thinking that the gain drop may also drop the noise into the background.

What do you guys think?

Thanks!
Kyle

Remove the tubes and reseat them, that may eliminate the noise. Also, Check all the press on connectors and make sure they are seated ( I hard wired my entire unit) Tighten the screws down on the 3 power transistors located on power supply bored.