Having just finished a project I'm looking for another one. Since both my sons play guitar and I own several guitars (but the cat runs to the other end of the house when I start playing
) I thought a nice project would be to build some inexpensive SE guitar amps. So of course I have a bunch of questions.
I'm thinking of doing the AX84 P1. It seems pretty simple, I've heard samples which sound good to me and I have some EL84s on the shelf. Also I can use some inexpensive trafos from Uncle Ned (I have one set).
So here are the questions-
1- Would it be possible to "drop in" the overdrive and master volume setup from the P1 Extreme by Phil Rowley? He uses EL34, 6L6 or 6550 type output tubes vs. the EL84 of the P1.
(One son plays almost 100% acoustic and wants very clean sound, the other plays about 100% electric and wants to be able to grunge things up, though he can use a pedal.)
2- If I made the proper value changes for the first two stages which as designed use a 12AX7 would I lose anything by using 12AU7 valves instead? The EL84 is easy to drive so I think the 12AU7 should be OK?
(I have a bunch of 12AU7s on the shelf and no 12AX7s.)
3- I have a couple of 8" PA speakers I'll use initially but I imagine we'll want something better eventually. What similar sized speakers do you recommend for a- acoustic guitar and b- electric guitar?
Thanks for any input!

I'm thinking of doing the AX84 P1. It seems pretty simple, I've heard samples which sound good to me and I have some EL84s on the shelf. Also I can use some inexpensive trafos from Uncle Ned (I have one set).
So here are the questions-
1- Would it be possible to "drop in" the overdrive and master volume setup from the P1 Extreme by Phil Rowley? He uses EL34, 6L6 or 6550 type output tubes vs. the EL84 of the P1.
(One son plays almost 100% acoustic and wants very clean sound, the other plays about 100% electric and wants to be able to grunge things up, though he can use a pedal.)
2- If I made the proper value changes for the first two stages which as designed use a 12AX7 would I lose anything by using 12AU7 valves instead? The EL84 is easy to drive so I think the 12AU7 should be OK?
(I have a bunch of 12AU7s on the shelf and no 12AX7s.)
3- I have a couple of 8" PA speakers I'll use initially but I imagine we'll want something better eventually. What similar sized speakers do you recommend for a- acoustic guitar and b- electric guitar?
Thanks for any input!