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For Sale 2021 DIY Sony VFET - VFET N Channel (pt 2)

Things you have for sale.
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#21
Mark Johnson said:
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.
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We used to live by the Nimitz Gate in Pearl. Dad rode his bicycle to the ship.

Been onboard the Kitty Hawk and the Missouri.

The Missouri was sort of a "always there" thing on the road home. Sort of a Welcome to Bremerton kinda thing.

While the Kitty Hawk was at PSNS in the late 70s we could see her from the front windows of my parents' home. ;-)

BTW, from Bremerton we couldn't see the Bremerton, no matter how hard we scanned the waters of the Sound in front of us...

Thanks for the info.... Chief, Permission to come aboard?

Those we such happy, innocent times. Oh well. I guess I'm in for a ride with this.... Do I have to play Morning Colors (National Anthem) and Evening Colors (Retreat) at the start and end of listening sessions?
 
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#23
chromenuts said:
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…😈
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Hmm... do you really need that stove back there? Do they amps get hot? I sure wish we had basements our here.
 
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