ledvedder
Well-known member
I'm thinking about converting my 2204 modded Origin 20 to a DS. I realize with the el34's, the power section won't be the same. I have some questions about some of the other differences.
1. 2200pF over the 100k cathode follower. Mine has a 470pF in this spot. What will this change?
2. 220k from treble wiper to master input. If I use a 500k master pot, is this still recommend? Same with the 1M from master pot input to ground. I'm assuming this isn't necessary with a 500k pot?
3. 47k NFB. Mine currently has 100k.
4. 470k and 1M PI grid leak resistors. Mine are both 1M.
5. 47pf PI cap. Mine is 100pF. Differences?
6. If I use a 100k gain pot, should I still put the 470k/500pF to the input, and the 220k to ground? I think I can omit the 220k to ground.
I already have the structure switch in my Origin. I think that's most of the changes. I'd love to hear everyone's feedback.
1. 2200pF over the 100k cathode follower. Mine has a 470pF in this spot. What will this change?
2. 220k from treble wiper to master input. If I use a 500k master pot, is this still recommend? Same with the 1M from master pot input to ground. I'm assuming this isn't necessary with a 500k pot?
3. 47k NFB. Mine currently has 100k.
4. 470k and 1M PI grid leak resistors. Mine are both 1M.
5. 47pf PI cap. Mine is 100pF. Differences?
6. If I use a 100k gain pot, should I still put the 470k/500pF to the input, and the 220k to ground? I think I can omit the 220k to ground.
I already have the structure switch in my Origin. I think that's most of the changes. I'd love to hear everyone's feedback.
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