AudioCircle
Audio/Video Gear and Systems => Low Wattage Systems => Topic started by: Freo-1 on 24 Apr 2015, 11:46 pm
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I want to hear from you Low Wattage guys about your SET amps. What is it about your SET amp that makes it special? Please share any relevant information about circuit design, tubes used, caps, and most important, your speakers. Pics welcome!
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Found Music 2A3 with Mercury rectifiers, direct coupled two stage design. There are two independent power supplies for each of the driver and power tubes. This 3W plays much bigger on my Tannoy Westminster GR, and while I own some higher powered amps that have more snap and power, the purity and tonal color of these is astounding, the sheer texture of this setup is hair raising at times, it's emotional listening to some music. I don't have pics in my setup yet, but here are some from someone else's room...
(http://www.audiocircle.com/image.php?id=119709)
(http://www.audiocircle.com/image.php?id=119710)
(http://www.audiocircle.com/image.php?id=119712)
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Looks very nice. Post some pics of your setup when you can.
What are using for source material? What preamp?
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I'm in the middle of some room changes. I'll have new pics in a few weeks. Preamp is Shindo Vosne Romanee and source is Lumin A1 digital or Sansui TU-717 tuner with mods. I also have a Line Magnetic 219IA SET integrated that's 24 watts using 845's and 300B's. No vinyl rig currently.
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Hi all.
My SET amplifier is a Decware SE84C+ 2wpc bought about six years ago.
The sound of the mids is what make me love that amplifier, never had a system that impress me so much.
As for the highs, I'm 67 years old, so probably my ears are limited to 12 KHz.
I did some tube rolling with the 5U4, 5Y3 and 5AR4 and did not ear any difference between them, so I kept the 5AR4 (Sovtek) because it's smaller.
For the 6922 I've tried five different makes/models new and NOS
and again very little difference between them, so I kept the 6922 Electro Harmonix new.
Now where I saw a difference/improvement in the sound, not much, but still noticible, was with the EL84. I tried different makes and end up with the Electro Harmonix EL84 new because to my ears the sound was a little more natural.
My Decware amplifier is stock, no modification on any components
and I don't intend to change anything, at least for now or even for a very long time.
My source is a Rega Apollo with Signal cables interconnects,
I have a passive switch box (My own brew) and the speaker are
Omega 7F open baffler dipole and I must say thay are the best I have owned, very natural and a good match for the Decware SET.
Of course if I could go from 2wpc to 6-8WPC I am sure it would improve the sound
but like they say: No mony - no candy !
For the bass I don't really know what my Decware SET can do, because I have amplifier open baffle dipole subs.
I would recommend to anyone that want a system that sound natural to go for the Decware - Omega combo.
Guy 13
(http://www.audiocircle.com/image.php?id=119715)
(http://www.audiocircle.com/image.php?id=119716)
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I also use a Decware: SE84CKCS (balanced & unbalanced inputs, stepped attenuator, V-caps). While I have done a bunch of tube rolling, I haven't found anything that sounds better than what came with it.
The amp drives a pair of Klipsch Cornwalls (from 1977). Original caps were shot. Tried swapping in some new stuff, sounded worse. Took an easy path, and dropped in new cross-overs from ALK engineering. Otherwise, all original Cornwalls.
Currently, the only tweak is the feet: Brown Electronic Labs (RIP).
I don't know that anything makes my set-up special. I have sources going straight into the amp, so, no pre-amp stage.
I know that it is the best sounding rig I have ever owned. Simply, everything sounds like it is supposed to sound. I hear all the garbage from bad recordings/mastering, digital compression artifacts from broadcast/streamed content, and all the havoc that time and poor storage decisions have on the original tape.
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Audio Note Kits "Kit 1" with Mundorf Silver/Gold/Oil cap upgrade. Terrific, gutsy little 300B amp. I love it. It blows away the Manley push-pull gear I had before (and that was by no means bad)! Currently searching for more SET-friendly speakers to go with it! :lol:
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Looks very nice. Post some pics of your setup when you can.
Here are the Found Music 2A3 mono's with Mercury rectifiers...
(http://www.audiocircle.com/image.php?id=123536)
(http://www.audiocircle.com/image.php?id=123537)
(http://www.audiocircle.com/image.php?id=123538)
(http://www.audiocircle.com/image.php?id=123539)
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I have a DIY EL34 SET with no driver section, my DIY Aikido preamp has just enough gain and a white follower output, which I have found makes a huge improvement between a triode gain stage and the power tube. The Aikido is an ideal driver section for a SET amp as well as a great preamp. Next, I plan on building a higher powered SET by replicating the exact setup I have now as a driver for a 211,845,805 or GM70... It'll be a while though because I have other stuff I'm working on that takes priority but hopefully it won't be too long. I look forward to a high power SET amp...
Pic below is from 4-5 years ago when the amp was setup as a Tubelab Simple SE with the driver. I still have the same equipment, just modified and tweaked to improve it as much as possible over the years, and now with a HAP-Z1ES source, plus I have several commercial amps to play with... and better cables. :green:
(http://i99.photobucket.com/albums/l318/davec113/system%2010-24-12/system10-24-12029.jpg) (http://s99.photobucket.com/user/davec113/media/system%2010-24-12/system10-24-12029.jpg.html)
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I like the look of your system Arthurs - understated functional elegance. Your picture has motivated me to increase efforts to complete the transition of my system.
The outputs on the Found Music amp look like high-nickel types - very nice!
Nicely done!
Cheers,
Ray
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My new amp is a semi-custom Finale Audio F138 FFX SE EL84 amp with a single input and volume control. Tube complement is 2 EL84, 1 12ax7 or 5751, and one 5AR4 rectifier. All iron is custom Hashimoto (outputs, PAS choke, and power transformer.) Coupling caps are Mundorf SIO (but subject to change as the amp breaks in. And, a showroom perfect Porsche mettalic Burgundy paint job. Tubes are all GEC Gold Lion re-issues, and again, no rolling until break-in is complete.
Even at first listen, this is a very special amp -- probably the best el84 amp I've heard, and sounds more like a DHT than I would have ever imagined. Built like a tank and with many boutique parts like tube sockets, RCAs, binding posts, and IEC inlet.
Speakers are either Blumenstein Orca deluxes wit dungeness max subs, or Rethm Trishnas. The whole system is new so I'll update things when I've had more listening time.
5.6 w/channel is more than enough with the 90 sensitivity Orcas, and way more than enough for the 97/98 dB Trishnas. This is also the quietest amp I've ever heard --tube, SS, digital, etc.
Oh, preamp is an Exogal Comet+.
More and photos when the whole system is together and broken-in.
-- Jim
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Speakers are either Blumenstein Orca deluxes wit dungeness max subs, or Rethm Trishnas. The whole system is new so I'll update things when I've had more listening time.
-- Jim
Jim,
Very interested to hear about your Blumenstein Orca Deluxe's. How do you like them?? :D
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I really like your setup! What are the dimensions of your listening room?
- Woody
Here are the Found Music 2A3 mono's with Mercury rectifiers...
(http://www.audiocircle.com/image.php?id=123536)
(http://www.audiocircle.com/image.php?id=123537)
(http://www.audiocircle.com/image.php?id=123538)
(http://www.audiocircle.com/image.php?id=123539)
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Hi Rebbi,
In short,I love them! Just sounds like music. Probably not a good choice if you listen to a lot of rap, listen lodly (greater than about 85 average), and don't expect to be blown back in your chair and have your pants legs flap.)
My room is 10' x 13' and I sit just a bit further away than would be considered nearfield -- though I know of other Orca users, using 2a3 amps in even larger rooms and still say it can get louder than he can listen. IMO, they are superb speakers if they fit your listening preferences, room, and preferred listening level.
There sizeis deceptive, but you can't change physics.
When these are fully broken-in, then I'll pull out the trishnas, give them more break-in and then decide which I prefer. I have no idea how this will turn out, but so far, the Orcas are the best speakers I've had.
Disclaimer: I also have two other pairs of earlier orcas in bamboo, and of course these are my ears, room, and tastes.
-- Jim
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Hi Rebbi,
In short,I love them! Just sounds like music. Probably not a good choice if you listen to a lot of rap, listen lodly (greater than about 85 average), and don't expect to be blown back in your chair and have your pants legs flap.)
My room is 10' x 13' and I sit just a bit further away than would be considered nearfield -- though I know of other Orca users, using 2a3 amps in even larger rooms and still say it can get louder than he can listen. IMO, they are superb speakers if they fit your listening preferences, room, and preferred listening level.
There sizeis deceptive, but you can't change physics.
When these are fully broken-in, then I'll pull out the trishnas, give them more break-in and then decide which I prefer. I have no idea how this will turn out, but so far, the Orcas are the best speakers I've had.
Disclaimer: I also have two other pairs of earlier orcas in bamboo, and of course these are my ears, room, and tastes.
-- Jim
Very useful, Jim, thank you!
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Jim, you have to report on the Orcas with the new SOL drivers!
Arthur, what are those beautiful speakers?
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Well, I don't have the SOL drivers installed yet as I'm doing several mods all at once (binding posts and internal wire, and DoF kit -- Mostly I am not listening right now as I build new networked streamers and a network to feed them, but first speakers on line after that will be my new (old) Abbys but with a custom DoF kit and the WK near-field drivers and massive Mapleshade footers. These may be the permanent speakers in this system, but only time will tell. I loved my original pair of Abbys from way back when and then like a fool, sold them, and have never yet found a speaker that makes music like they do (to my ears.) Recently, and after years of looking, I found an original pair of C&C Abbys and even in the same finish as my old ones. Believe me, these are going to stay put this time -- beeen through enough speakers from cheap to expensive and these just do it for me and I can't wait to try them with the far better source gear I now have instead of the stuff I had with my first Abbys.
-- Jim
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Here are the Found Music 2A3 mono's with Mercury rectifiers...
(http://www.audiocircle.com/image.php?id=123539)
I am very curious about the white back wall. Is that a partition? Does it provide some sonic room treatment or hide a door or equipment?
Looks great. Excellent dream setup!
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Here is one of my amps.
(https://www.audiocircle.com/image.php?id=194395)
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And the other.
(https://www.audiocircle.com/image.php?id=194396)
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Here is one of my amps.
(https://www.audiocircle.com/image.php?id=194395)
What is that? Looks like a 211 output tube?
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I have a few SET amps that I cycle between. Right now I'm really loving my Almarro A318B (hotrodded) amp driving Klipsch Heresy IIIs in my upstairs system:
(https://www.audiocircle.com/image.php?id=194401)
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I have built a couple of the Bottlehead amps, the original Stereomour 2A3 and the Kaiju 300b with the DC filament kit. Both amps have great sound when paired with the right speakers. The 2A3 amp I used with the 96dB efficient GR Research V-1, the Servo subs had their own amps so it was only driving the Coax from 200Hz and up. The Kaiju I built for the 94dB efficient GR Reseach Wedgies, again the Wedgies are supported by the Servo subs but in this case I High passed the amp 70HZ, so the Wedgies were getting more bass, and bass is what the Kaiju gives you, really outstanding bass, yes it is high passed, the bass texture is excellent. It also drives my GR Rearch NX Otica MTMs very well, the bass shines with these speakers.
Some Stereomour Pics:
(https://www.audiocircle.com/image.php?id=61266)
(https://www.audiocircle.com/image.php?id=47516)
(https://www.audiocircle.com/image.php?id=47414)
Kaiju (Takatsuki 300bs currently in use :thumb:)
(https://www.audiocircle.com/image.php?id=142759)
(https://www.audiocircle.com/image.php?id=145539)
(https://www.audiocircle.com/image.php?id=142749)
(https://www.audiocircle.com/image.php?id=145540)
(https://www.audiocircle.com/image.php?id=141731)
Best,
Ed
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http://
All of these units look beautiful any recommendation for Low powered units to drive 97.5 Daedalus Poseidon- speakers they need 3 watts plus as per species. .So I have looked at Deware 84Ckcs but they are only 2 watts others on my list are Allnic 1500 MK 2 , Allnic M300 Airgtight 300R (very expensive)
:popcorn:
Asghar
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What is that? Looks like a 211 output tube?
Correct it’s a 211 integrated manufactured by Transcription Audio here in the UK. No two of their amps are the same. This one has C core output transformers.
Most have this big capacitor fitted
(https://www.audiocircle.com/image.php?id=194409)
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I have a few SET amps that I cycle between. Right now I'm really loving my Almarro A318B (hotrodded) amp driving Klipsch Heresy IIIs in my upstairs system:
(https://www.audiocircle.com/image.php?id=194401)
That's a sweet amp...🍿🍿🍿
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That's a sweet amp...🍿🍿🍿
Thanks man! Here's the really crazy thing about the amp. You see there's 3 transformers on the top of it, and you think, "wow those are really big output transformers on the side, but that power transformer in the middle looks a bit wimpy". But, that middle transformer is NOT the power transformer, it's the CHOKE!!!!
No, if you open it up, you can see the actual power transformer is this HUGE industrial scale transformer that takes up 50% of the space inside the amp:
(https://6moons.com/audioreviews/almarro5/hero_open2.jpg)
Yeah, it's CRAZY!! I'd say 70% of the entire amp is basically just giant transformers, haha.
And of course I couldn't leave it "as is", as I like to tinker. So things I've done to improve it:
1. Bypass the volume pot
2. Bypass the input selector switch
3. Replace all internal wiring with UP-OCC wire from VH Audio
4. Jupiter Copper coupling caps
5. Teflon Film output caps
6. Miflex Copper foil bypass cap on the power supply
7. ETI UP-OCC input RCA jacks
8. Pure Copper, low mass Furutech binding posts
9. Tung Sol 6SL7 and 6SN7 tubes from the 1950's
It started out as an excellent sounding amp, and with all the changes (each one was small, but they were cumulative), I'd say it's one of the very best amps I've ever heard. 18 watts of pure SET bliss.
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Thanks man! Here's the really crazy thing about the amp. You see there's 3 transformers on the top of it, and you think, "wow those are really big output transformers on the side, but that power transformer in the middle looks a bit wimpy". But, that middle transformer is NOT the power transformer, it's the CHOKE!!!!
No, if you open it up, you can see the actual power transformer is this HUGE industrial scale transformer that takes up 50% of the space inside the amp:
(https://6moons.com/audioreviews/almarro5/hero_open2.jpg)
Yeah, it's CRAZY!! I'd say 70% of the entire amp is basically just giant transformers, haha.
And of course I couldn't leave it "as is", as I like to tinker. So things I've done to improve it:
1. Bypass the volume pot
2. Bypass the input selector switch
3. Replace all internal wiring with UP-OCC wire from VH Audio
4. Jupiter Copper coupling caps
5. Teflon Film output caps
6. Miflex Copper foil bypass cap on the power supply
7. ETI UP-OCC input RCA jacks
8. Pure Copper, low mass Furutech binding posts
9. Tung Sol 6SL7 and 6SN7 tubes from the 1950's
It started out as an excellent sounding amp, and with all the changes (each one was small, but they were cumulative), I'd say it's one of the very best amps I've ever heard. 18 watts of pure SET bliss.
Bro, that pic should be removed, and put in the porn section, just for adults only...🤣🤣🤣🤣🤣
🍿🍿🍿
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http://
All of these units look beautiful any recommendation for Low powered units to drive 97.5 Daedalus Poseidon- speakers they need 3 watts plus as per species. .So I have looked at Deware 84Ckcs but they are only 2 watts others on my list are Allnic 1500 MK 2 , Allnic M300 Airgtight 300R (very expensive)
:popcorn:
Asghar
Personally, I'd be looking at bigger amps. Sensitivity isn't the whole picture and imo a speaker like that is often best with a larger amp.
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Brand spanking new 300B added to the group of amps. Just delivered today, setting up and burning in tonight.
(https://www.audiocircle.com/image.php?id=194529)
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Brand spanking new 300B added to the group of amps. Just delivered today, setting up and burning in tonight.
(https://www.audiocircle.com/image.php?id=194529)
What is it - Bottlehead?
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Yep, Bottlehead Kaiju with Magnequest TFA-2004 Mexico outputs.
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Here's mine:
(https://www.audiocircle.com/image.php?id=194675)
(https://www.audiocircle.com/image.php?id=194677)
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Bottlehead SR-45 for my HD-800's and Frugal Horns.
(https://www.audiocircle.com/image.php?id=203441)
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My 2A3 monoblocks (5Y3, 6SN7, 2A3). These started out as George Wright WPA-3.5 amps. Over the past 15 years or so, I have done several rounds of component upgrades which eventually lead to building them into these larger chassis. They still have all the original iron, and the circuit is close to original, but most of the components have been upgraded. Better quality caps and resistors throughout. I'm using a CCS on the 6SN7 driver, and have a grid choke on the 2A3.
(https://www.audiocircle.com/image.php?id=203981)
(https://www.audiocircle.com/image.php?id=203982)
(https://www.audiocircle.com/image.php?id=203983)
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6C33 SE 18W setreo amp
(https://www.audiocircle.com/image.php?id=210023)
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Hey!
(https://www.audiocircle.com/image.php?id=212571)
Let's call this pic the "SET Cat"
It had been hotter than usual here in NYC this summer. I find my cat Sonny cuddling with my Bel Canto 845 SET. Sometime I'd find him literally sleeping with his back against the amp's all metal chassis to keep cool.... when the amp is off of course 8) Even with my A/C unit on I still find him cuddling with the amp! I'm getting jealous :lol:
Buddy
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Hey oldnuke - that is the best looking Bottlehead item I have ever seen. Mine never looked anywhere near that good. Heck, I was doing good to clearcoat the bases.
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One of my Sean Casper built 45 mono amps.
(https://www.audiocircle.com/image.php?id=212603)
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Triode Lab 2A3 Mono Blocks 4.5 Watts Hashimoto OPT
(https://www.audiocircle.com/image.php?id=212605)
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Hey oldnuke - that is the best looking Bottlehead item I have ever seen. Mine never looked anywhere near that good. Heck, I was doing good to clearcoat the bases.
Thanks! That's all PaulB, he's great at building amps. All I had to do was pick the color and front layout and provide some parts. The interior is just as good looking.
(https://www.audiocircle.com/image.php?id=212684)
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6C6 directly coupled to 2A3 running at fave operating point for about 2.5W out. A build experiment that got a little crazy a couple of years ago; heavy for a directly coupled amp at about 25kg per mono. I learned a bit and am currently purchasing parts for my next amp... which might be crazier.
Needs a clean
(https://www.audiocircle.com/image.php?id=213048)
Some interior. 0v signal ground is different now (-ve of reservoir cap to spot near safety earth).
(https://www.audiocircle.com/image.php?id=213050)
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Bottlehead 2.0 SEX amp, uses 6DN7 tubes, 2 watts per channel, for headphones and speakers. This amplifier has been in Burning Amp, headphone shows and meets.
(https://www.audiocircle.com/image.php?id=213099)
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6C6 directly coupled to 2A3 running at fave operating point for about 2.5W out. A build experiment that got a little crazy a couple of years ago; heavy for a directly coupled amp at about 25kg per mono. I learned a bit and am currently purchasing parts for my next amp... which might be crazier.
Needs a clean
(https://www.audiocircle.com/image.php?id=213048)
Some interior. 0v signal ground is different now (-ve of reservoir cap to spot near safety earth).
(https://www.audiocircle.com/image.php?id=213050)
Sweet. Nice work.
charles
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Here's my brand new 300B SET. Sorry for the mediocre photos. Too much light in the room for a low dynamic range smartphone camera.
Hand laid transformers. 300B, EF86, GZ34, 12AU7 tubes.
(https://www.audiocircle.com/image.php?id=214608)
(https://www.audiocircle.com/image.php?id=214605)
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Sweet. Nice work.
charles
Thanks Charles.
This thread is about sharing about our amps - I didn't really do that. :oops: I find that difficult because of the many details that went into this amp: it really was a bit of a thought experiment and I would not recommend an amp build like this... though it does sound lovely (slightly warm, coherent, expressive with surprisingly linear-sounding bass) despite (because of?) the high frequency roll-off expected when a low gm pentode drives a DHT.
The basic design is a classic direct-couple, not Loftin-White or monkey or variants. I like the sound of the EML and JJ 2A3 tubes with the plate at roughly 1mA:6V, in this case 42mA and 250V with a 4.2K load; AC filaments. Good for maybe 2.5W, probably a bit less. Tubes will last forever if start-up and filament voltages are well-managed. The 6C6 is run as pentode at common operating points. The only bit of trickery being that a voltage divider is used to derive screen V (rather than a simple dropper) and the screen bypass is returned to the cathode, rather than ground. PS is a simple tube-rectified pi filter designed for low impedance and fast and clean recovery - I will do it differently next time...
Build was guided by a few things I wanted to achieve and just experiment with. I wanted to be able to compare this build to a RC coupled amp of similar design that I own; ensure reliability and low noise/hum/buzz; use quality transformers and chokes; avoid 'lytic capacitors; minimise parasitic capacitance; avoid magnetic and dissimilar conductors where practicably possible; keep current loops direct (if not as short as possible) and treat them with the same care as "signal"... blah blah blah.
I don't recommend my design choices or expect others to have the same goals or make the same choices. I like that humans have diverse opinions and make different decisions.
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2a3 Bottleheads
(https://www.audiocircle.com/image.php?id=214949)
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Dared 2a3
(https://www.audiocircle.com/image.php?id=214951)
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Miniwatt S1
(https://www.audiocircle.com/image.php?id=214952)
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After being out of the hobby for quite awhile, I am enjoying seeing some of the amps that people have been playing with.... these are a couple that I have had in my systems...
(https://www.audiocircle.com/image.php?id=217799)
(https://www.audiocircle.com/image.php?id=217800)
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Audio Note Kits 300b SET Interstage Mono Blocks 8)
(https://www.audiocircle.com/image.php?id=217838)
(https://www.audiocircle.com/image.php?id=217839)
(https://www.audiocircle.com/image.php?id=217840)
(https://www.audiocircle.com/image.php?id=217841)
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Don't think I've posted this one. My new low powered 845 amp by Paul Birkeland. Great amp!
(https://www.audiocircle.com/image.php?id=217915)
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Audio Note Kits 300b SET Interstage Mono Blocks 8)
(https://www.audiocircle.com/image.php?id=217838)
...
Hey!
Nice! I always enjoyed Audio Note system every time I see them at audio shows. They don't jump out at you when you walking but if you sit and listen, you'll ended up just enjoying the sound of music.
By the way, I do own an Audio Note UK M1 Phono preamp which I bought new back in 1997. With a bit of mods I still have it and use it in my system. The Audio Note Kit weren't around back when I bought the pre amp and my current SET amp monoblocks, otherwise I'm sure I probably would have ended up with their amp and pre amp.
Buddy
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Decware SE84C+ updated to CKC uses 6p15p output tubes.
(https://www.audiocircle.com/image.php?id=227298)
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Alan Eaton SET 45 -- received yesterday - plays very well with my Omega (94.5db) CAMs
(https://www.audiocircle.com/image.php?id=223477)
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I use a Decware Zen Triode with a pair of vintage Klipschorns. Great vocal and soundstage.
(https://www.audiocircle.com/image.php?id=227293)
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A 45 DHT SET and an el84 SET. Both come in around 1.5 watts. Both are wonderful but the tone of the 45 Triode is glorious!
(https://www.audiocircle.com/image.php?id=227304)
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Taylor T20 SET built by Paul Birkeland. Gray metal casing with stained Ash sides.
(https://www.audiocircle.com/image.php?id=232831)
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>deleted<
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This is not pretty, but it's a 1.5 watt per channel prototype built by David Berning with 6LU8 tubes. He wanted to see what he could do with these plentiful tubes. I appreciate his curiosity, because I can find replacements for under $10, and it sounds wonderful with my WLM Diva (full size) speakers in my 11 x 11 room. It is my summer amp. During winter I use Audio Mirror Eargasm monoblocks with 20 watts (6SN7 driver and 6SL7 input tubes. The two 6C33C output tubes are connected in parallel mode).
(https://www.audiocircle.com/image.php?id=237447)
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Taylor T20 SET built by Paul Birkeland. Gray metal casing with stained Ash sides.
(https://www.audiocircle.com/image.php?id=232831)
Hey!
Man! That looks cool. I love tubes with anode caps, they look like they are from a mad scientist's lab.
Buddy
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This is not pretty, but it's a 1.5 watt per channel prototype built by David Berning with 6LU8 tubes. He wanted to see what he could do with these plentiful tubes. I appreciate his curiosity, because I can find replacements for under $10, and it sounds wonderful with my WLM Diva (full size) speakers in my 11 x 11 room. It is my summer amp. During winter I use Audio Mirror Eargasm monoblocks with 20 watts (6SN7 driver and 6SL7 input tubes. The two 6C33C output tubes are connected in parallel mode).
(https://www.audiocircle.com/image.php?id=237447)
Hey!
Beauty is in the sound. I buy or make audio first for the sound, looks come after. Although luckily both of my SET amps also look great... well at least to me of course.
Buddy
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Wolf Ear Kitoki v.3 in wood, aluminum chassis to come. 6V6 SET. 6sn7 input, 5y3 rectified.
(https://www.audiocircle.com/image.php?id=238795)
(https://www.audiocircle.com/image.php?id=238798)