Anyone use these tubes?

[marnold***]

That should be taken with a grain of salt. The EL84 by design is a high gain tube and power tubes in general tend not to be microphonic like preamp tubes. If they are using the Sovtek EL84M, that is the Russian mil-spec version of their EL84.

Yeah, I always take tube recommendations with a grain of salt, but it is the preamp tubes that are Sovteks. The EL84s are JJs.

[tunghaichuan***]

Yeah, I always take tube recommendations with a grain of salt, but it is the preamp tubes that are Sovteks. The EL84s are JJs.

D'oh! Looks like my reading comprehension skills need some work.

[kiteman]

Well, I just jammed for a while. The difference is night and day. I only played as loud as my drum machine on the Fender Rumble 25 bass amp. All my patches that I use just sounded *****in' on the gold channel. My guitar sounded different and I gotta try my other guitars.

In stock the amp was biased cold as others say. It sounded good as it is surprisingly. Now it's like 3D. I think I can bias it a little cooler.

[kiteman]

Well, I haven't played with the amp much but last time I played I noticed some warbling in the sound, I was blaming the ceiling fan til I played in a different room. After some researches I found that warbling came from the output tubes running too hot. I backed them off to 26 ma and the warbling stopped. At least I didn't red plate.

What's funny is that after researches most says 35-40 ma is the ideal setting and some say they got it from the Line6 techs. I have my doubts and saw the reason why my amp was set at 21 ma. Some says theirs was at 23-26 so I think I'm in the safe range. Of course if I did the formula I'll know what mine should be set at.