So I was one of the lucky ones to be able to build and own one of a few hundred 2021 DIY Sony VFET amplifiers as pre built (OS) and tested by mr. Pass.
Now, due to significant downsizing, basically losing a hobby/listening room due to family expansion, I put this amplifier up for sale.
The amplifier is the N-channel version, see link to build thread. I have built it fully as stock and the Meanwell SMPS is included. In the past two years I have had the amp playing compression drivers on Yuichi Horns from 600hz and up. The sound, well this forum will back up it's qualities 🙂
Please send me your best offer + shipping and paypal fees from The Netherlands. I'd rather have this amp making someone happy than it being not in use at my place but if it does not meet my price, I will keep it as the collectors item it is. 🙂
Now, due to significant downsizing, basically losing a hobby/listening room due to family expansion, I put this amplifier up for sale.
The amplifier is the N-channel version, see link to build thread. I have built it fully as stock and the Meanwell SMPS is included. In the past two years I have had the amp playing compression drivers on Yuichi Horns from 600hz and up. The sound, well this forum will back up it's qualities 🙂
Please send me your best offer + shipping and paypal fees from The Netherlands. I'd rather have this amp making someone happy than it being not in use at my place but if it does not meet my price, I will keep it as the collectors item it is. 🙂
There's got to be a heavy heart to let go of this sweet baby so that buyer has to pay dues, or a big chance that you to change your mind😉
True that. The lottery process was such fun with the waiting and hoping that you got picked. This amp still reminds me of what this hobby brings me, including the Community that makes it all possible😊
So, this amplifier came back to me with the front ends not working due to incorrect placement of signal trafo's. I replaced them with the DIY FRONT END 2022 and she sings again! After not wanting to part with them for the past year, it is time to let go of her again, as I have too many amplifiers including Tokin SIT amps that suit my loudspeakers better.
So she's up for sale again!!
The gem comes with the original input boards and the new DIY FRONT END 2022 boards.
Asking EUR 800 excluding shipping from the Netherlands.
So she's up for sale again!!
The gem comes with the original input boards and the new DIY FRONT END 2022 boards.
Asking EUR 800 excluding shipping from the Netherlands.
I PM'd.
Maybe I can hide this one under the bills.... It just dawned on my that this bill will come in NEXT year...
Next year I need to stop and concentrate on the garden beds and the turntable -and the op amps.
I may have to start selling things too, gulp!
Maybe I can hide this one under the bills.... It just dawned on my that this bill will come in NEXT year...
Next year I need to stop and concentrate on the garden beds and the turntable -and the op amps.
I may have to start selling things too, gulp!
Remind me, I'm lazy and actually trying to work ( getting the build done for some code that the vendor shipped is a PITA )...
How much power does this baby put out?
I'm trying to set up yet another system in the office specifically designed around low/mid power amps. I'm finding that I managed to tame the acoustics in the room...
How much power does this baby put out?
I'm trying to set up yet another system in the office specifically designed around low/mid power amps. I'm finding that I managed to tame the acoustics in the room...
Just a quick reminder here that the diyAudio Store sells four different front end cards (full kits including PCB and all parts) that were specifically designed to drop into the lottery VFET amps -- including this one. They are named Scourge, Bulwark, Marauder, and Dreadnought. (after British warships).
If you want extra variety, the "Ship Of Theseus" front end cards are also fully compatible with the lottery VFET amps. They are considerably more DIY; you'll have to order PCBs and also order the parts yourself. There's no kits. These are named after American warships (mostly)
Nimitz is a customizable Front End which accepts M2x daughter cards. Builders can bolt whichever M2x card they wish into Nimitz, and that becomes the Front End for a VFET or Theseus amplifier.
Missouri is a Front End that accepts balanced inputs. It uses the highly regarded THAT-1200 differential receiver IC for maximum CMRR
Bon Homme Richard is a high performance opamp (AD797), plus a discrete JFET input stage, fed by a shunt-mode voltage regulator for maximum PSRR
Kitty Hawk is a transconductance (current output) amplifier, which uses a Rush Cascode input stage: PNP follower + NJFET common gate.
Lexington is a folded cascode discrete opamp, using a self-generated high voltage supply (“JBOOST2”) and no Edcor transformer. The boost circuit includes an isolated DC-to-DC converter module plus extensive filtering.
Hornet is a discrete opamp whose unusual all-JFET output stage has no degeneration resistors. The supply filter is cascoded, each of the two constant current sources are cascoded, and the input is a Rush Cascode.
Pequod was Captain Ahab’s whaling ship in “Moby Dick.” Although not a warship, it was American. The Pequod Front End is a simple opamp follower with few parts and relatively modest parts cost. It accepts either dual opamps (e.g. LM4562) or single opamps (e.g. LT1122) and the two opamp sockets are surrounded by blank empty zones, making iteasier to fit discrete opamp modules such as Sparkos or Burson, if desired.
If you want extra variety, the "Ship Of Theseus" front end cards are also fully compatible with the lottery VFET amps. They are considerably more DIY; you'll have to order PCBs and also order the parts yourself. There's no kits. These are named after American warships (mostly)
Nimitz is a customizable Front End which accepts M2x daughter cards. Builders can bolt whichever M2x card they wish into Nimitz, and that becomes the Front End for a VFET or Theseus amplifier.
Missouri is a Front End that accepts balanced inputs. It uses the highly regarded THAT-1200 differential receiver IC for maximum CMRR
Bon Homme Richard is a high performance opamp (AD797), plus a discrete JFET input stage, fed by a shunt-mode voltage regulator for maximum PSRR
Kitty Hawk is a transconductance (current output) amplifier, which uses a Rush Cascode input stage: PNP follower + NJFET common gate.
Lexington is a folded cascode discrete opamp, using a self-generated high voltage supply (“JBOOST2”) and no Edcor transformer. The boost circuit includes an isolated DC-to-DC converter module plus extensive filtering.
Hornet is a discrete opamp whose unusual all-JFET output stage has no degeneration resistors. The supply filter is cascoded, each of the two constant current sources are cascoded, and the input is a Rush Cascode.
Pequod was Captain Ahab’s whaling ship in “Moby Dick.” Although not a warship, it was American. The Pequod Front End is a simple opamp follower with few parts and relatively modest parts cost. It accepts either dual opamps (e.g. LM4562) or single opamps (e.g. LT1122) and the two opamp sockets are surrounded by blank empty zones, making iteasier to fit discrete opamp modules such as Sparkos or Burson, if desired.
I am still young, stupid and greedy enough. I built one I got in the lottery…and bought the second from someone else here that decided to move on.
Worth every penny. I love them driving my dipole/front horn project.
I’m not done with VFETs either…😈
Worth every penny. I love them driving my dipole/front horn project.
I’m not done with VFETs either…😈
The amps definitely are!
The speakers are still a work in progress, but I’m loving what they can do so far.
I may need a dipole sub. I also want to see if adding a supertweeter brings anything I want to the table… plus some aesthetic/tecnical issues of integrating both.
The speakers are still a work in progress, but I’m loving what they can do so far.
I may need a dipole sub. I also want to see if adding a supertweeter brings anything I want to the table… plus some aesthetic/tecnical issues of integrating both.