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Already pm'd you, but I'll leave my reply here as well in case someone else will be inquiring about it later. The short answer is: no, you can't make Rev C mod only to channel 3 except for the presence potentiometer value. Channel 3 and 4 are in essence the same. They are only distinguished by...

I don't have Single Rec, but had this stored on my hard drive and it seems to fit your description pretty much. Hope it's what you're looking for.

So do you mean that a Rev C on Orange Vintage is much different from the other revisions - including Rev D? I'm aware of the horrible cleans on both, Rev C and D, and understand that channel cloning Orange to Modern must be much brighter as well, but how's the Orange Vintage mode then? Thanks!

Yet another legendary find. Good job! You say it's very saturated so do you mean it's different from your standard Rev C models? I'd be highly curious of some gutshots if that's the case. Are those settings taped on top of the amp supposed to be how Lynch set the amp up or what? I find them...

This conductor is there on all 2 channel Rectos to my knowledge. There's a discussion about it in the thread below. Apparently, it seems to be there for hum reduction purposes: http://music-electronics-forum.com/t20724-2/ Most it's importance to the circuit must've been very minor and likely...

I think you're right that the Rev C and D circuits are nearly identical. Many have reported that Rev D is slightly darker compared to Rev C. You could measure the resistance of the presence pot on the Red channel to see if it's 220k or 100k ohms. This could be one possible difference between the...

I've tried 250k, 500k and 1Meg gain pots on my clones and 250k is my choice. 500k can work alright and some even like it with 1 Meg, but for me it's just an overkill. I'd just hit the frontend with a booster, but YMMV. If you find your amp to have 100k gain pot, I'd definitely swap that with...

I think you're on the right tracks. Many consider that tube power section is actually the only part of tube amps that is responsible for what we call the "tube sound" or "tube amp feel." I wouldn't say call tube preamps redundant, but majority of their features can be simulated fairly well with...

Not on an actual Rectifier, but I've compared between 10uF, 20uF and 30uF caps on my SLO/Recto-clone I've built. In my experience, the higher you go, the more punchy, bigger and less compressed the amplifier feels. It feels as if the amp slightly cleans up. The lower value caps provide slightly...

3-channel Rectos have 20uF filtering at the parallel power supply nodes of the preamp while 2-channels models have 30uF in these positions. Swap the two pairs of parallel 10uF electrolytic filter caps in the power supply with 15uF caps with similar (or better) specs. This task is not that simple...

I noticed that you don't seem to use Vintage mode at all although majority of the dominant sub lows come from lack of NFB on Modern mode. If you wanted, you could try modding Vintage mode closer to Modern mode by locating the 47k NFB resistor and swapping it with 100k or even 150k resistor.

Good to hear you got nice results. And I agree about the gain pot. I would see Recto's gain pot as an improvement over SLO's 500k gain pot. There's much more useable range with Recto's gain pot with different tonal options. Actually, those two stages are that the last ones to saturate. The...

Have you tried wiggling the power tubes in their sockets when the problem sets in to see if it causes any changes? If it does, the pins could be simply loose and then it would be just a matter of tightening them. Have you checked the power tube sockets themselves to see if there's any carbon...

If you simply want to tighten the bottom-end, just change the first coupling cap (22nf Orange drop) to 4.7nF or even 2.2nF. That will definitely help in that respect. I don't think there's need to tinker with the cathode bypass caps or bright caps on the gain pots. I still recommend bypassing...

This is highly subjective matter as any "is item X necessary"-question and depends on combination of various factors: - What style of music do you play? (Jazz, blues, rock, extreme metal - you name it) - How do you play your guitar? (soft touch, very legato <-> heavy handed, percussive) - How...

I'd be interested to get my hands on the schematics for the Reborn version. I never figured out any difference in the signal part of the circuit. I know thath the 2ch Rectos had more filtering in the preamp B+ supply nodes which definitely makes difference in the tone and response. The Reborn...

In brief, turn the bass knob all the way down on Vintage mode and you are in Marshall/SLO territory. Now for the longer explanation: Yes, Recto tone stack is essentially identical to SLO/Marshall/Fender Bassman 5F6 tonestack. However, immediately after the treble pot there's a low-pass filter...

Yes and no. They're in the circuit all the time. When silicon diodes are selected, they are switched in parallel with the rectifier tubes. However, they don't have any effect on the tone as current now has much easier path.

I found the EL34s work way better for me. They have very vocal mids and don't have the excess bandwidth of the 6L6GCs. I should highlight that I like to set my bass pot very low even with the EL34s so YMMV.

What APEMAN said. There's no any advantage. If you have same type of rectifier tubes from different manufacturers, there's no problem either to mix them.