Roadking II Pre amp valves

[Flavell777]

Hey guys,

Found some preamp tubes lying about was wondering if any one could advise which would be best to try in what positions?
I'm trying tone down the buzzy vibe i'm getting from ch 3 and 4.

I've got these to try:

2 x High Gain JJ Telsa ECC83S
2 x JJ ECC803S
1 x Regular JJ ECC83S
4 x Electro Harmonix 12AX7EH
3 x Shuguang 12AX7E9 (9th gen)
and some mesa russian + Chinese

Also can anyone tell me which tube positions do what?

Thanks in advance.

 

[CudBucket]

What are your settings?

 

[RoadKinger483]

I would go with the Electro Harmonix tubes in all the positions (1-4) and put a regular JJ in V5. Electro's are quiter and sound way more rich than JJ's IMHO.