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You can even take out all the rectifier tubes when using the solid state rectification, if the idea is for saving those tubes. :P

I would like to give credit to Afu for the insight and valuable info on recto circuit. At last, i solved the problem. It's the coupling capacitor located before the V5 b (PI). It has been the culprit from the day one and all efforts to solve misguided to blame it to 'faulty' tubes. New yellow...

That's a logical thing to start with.. thanks afu for your suggestion. I'll start from there then. It's freaked me out, because every time, when i play the amp it sound ok, and the next day, after a while the hum issue could suddenly popping out, and it will back to sound normal again just by...

I try to figure out what is the cause; when it comes to suddenly loss/cut off in volume and only moderate audible hum dominated the sound in all channels. I try to measure the dc voltage in the plate of the phase inverter tube with the dmm, comm touching the ground/chasis and the other lead to...

Got mine brand new around mid last year , date of production 12.18.2015 hand written on the chassis, its already with the fan cooled and substantially lighter than non multiwatt triple. I noticed both used the same transformers, so maybe the metal chassis use lighter material, is it?

Currently i run matched 6 of Sovtek 5881WGC in my triple and they perform superb in that amp. The distortion sound more aggressive and brutal, punchy and depth. They have been there for more than 7 months and i never willing to re install the Mesa 6L6 back.

Thanks for the info, afu. I will try those set in my triple, with 4 tubes installed only. Mesa grade their 6L6 s with color code, just wondering if those higher pc of Ruby closer to green in Mesa grade .. (if they will run colder).

Hi Afu, i have a matched quad of Ruby 6L6GCMSTR with PC 52 and TC 3500. Are they ok to use in Recto?

Take into account that between dual and triple the OT are different, while the older 3 ch and the reborn both have same OT. If this could make the dual and the triple different in sound...

After almost a couple of months observation, including some re-soldering work to some points, mostly at the vicinity of V4 & V5 circuit, i should come to the conclusion that it is, most likely, those pre-amp tubes (it might be the CT or PI or V2, i wish i could test with the tube tester device...

Tight Metal Pro output to the return jack (and set the return knob to open -- in case of non multi watt dual), activated the loop via fs or the back panel switch. You can try to assign the channel in modern mode (Ch. 2 or 3), in this setting :twisted: the negative feedback is bypassed and the...

That it's intermittent makes me think something is dirty with corrosion or the cold solder joint is an issue. It isn't going to hurt anything to resolder that joint. The other thing is that bypassing the loop and wiring directly into the input to the PI seemed to solve your problem. Be sure...

Based on the experiences and expertise that you can share, afu, masterotono and others, what can you suggest on the described issue i have? Thank you so very much.

I also find the same thing with the (reissue) regular 808 and the hw version, missed the warmth, the Maxon 808 can give more definition and clarity to the aggression, i.e. distortion tone. But the 35'th (with narrower casing) is the next level different, it accentuate the warmth and thick...

A million tones ...! Agree. The triple is such a beast, even though circuitry wise in the pre-amp section it same with the dual but it really capable to do more things in term of aggression and brutality in tone. The multi-watt and non multi-watt version both are heavy and brutal as hell, don't...

Now i almost come into the conclusion to blame it on the cold solder joint. At the spot of power section input cap, right before the PI. That the only place i touched with the tip of soldering pencil when i connected a female jack for another external pre-amp input to the power section, beside...

Continue to observe what will happen next, when i just leave the amp on in playing mode, the chain is: guitar--cable-- to input (front panel)--speaker from just quite silent (in channel 1 mode, master at noon, gain, channel master and eq all at noon, send pot at noon) for about 2 hours, suddenly...

I notice the strange thing happened before. When playing the amp and suddenly loss volume and it just like crackle noise, i switched the stand-by switch to off and on, couple times until the sound back to normal. When this problem came and switch the amp to off, i can hear crackle noise or...

Thanks so much for the advice. Pointed to rectify the cause of the problem to the OT make me lil' discourage. I remember back in the day when i first play the amp, it was brand new, all features of the amp, visibly, functioned properly: channel switching, foot switch, loop send & return, all...

I have problem with my triple rectifier head, the 3 channel non multi-watt model (year 2008). While playing, after for about 10 to 15 minutes it suddenly has severe volume drop, like cut off. From the cab just came out faint/little hum, when this symptom happen the guitar sound become very weak...