cleanest tube upgrade

[schotness]

I'm looking for the cleanest tube upgrade I can do to v2 junior, I'm not too bothered about it sounding sterile or lifeless Cos i intend to use the junior as a platform for a modeling pedal & mic input, perhaps drum machine too to match my friends medium volume accoustic combo. Of course it would be nice if it still broke up after about 3 o clock, but thats not absolutely necessary. it would be nice if the tubes were easily available in the UK as well.

Thanks

[dirtypool71]

I read that a 12AY7 is lowest gain then the 5751 which is 30% less gain than a 12AX7. I'm using a 5751 and like it alot.

[layboomo]

Both the 12AY7 and the 5751 are good choices,but adding negative feedback is a really important mod to get the cleanest tones out of your amp. A hammond output transformer will also make a world of difference in a version 2 for clean tones. With just a tube swap try the lowest gain option 12AY7 first. I'd actually consider selling your version 2 to a modder and buying either a version 3 or a blackheart instead of doing all of the upgrades unless you enjoy the modding aspect of it which some of us do. The blackheart has a few advantages over the jr right out of the box for your application IMHO because you have more control over the gain structure and tone shaping,although I think the cranked lead tone is better on the valve jr.....thast doesn't sound like what you want to use it for.

[schotness]

Yes I'm starting to think it might be better to go for a small powered pa speaker, or even a mackie srm150 & keep the junior as is cos I do really like the sound at past 12