This list is not exhaustive, so please post/share stuff I've forgotten, other circuits, favorites posts, etc.
Aleph Jzm
A simplified, UMS-compatible version of the classic Aleph J.
Aleph Jzm
Babelfish F8
A dual rail, dc-coupled variation of the FW F8.
Babelfish F8
Babelfish J
A babelfish'd version of the Aleph J. Standard parts.
About possible Babelfish J interest
Babelfish XJ
A babelfish'd version of the Aleph J with SUSY (Supersymmetry). Standard parts.
Babelfish XJ , or JX …….. or whatever (Aleph X servo for Greedy Boyz)
Babelfish J2
A babelfish'd version of the FW J2. IRFP150's for the OS transistors.
Babelfish ᄅſ....or FW J2 on Steroids .... or Not your Father's J2!
Babelfish M25
A babelfish'd version of the FW M2. Standard parts.
Babelfish M25, AKA M2 on steroids, AKA M2-XA25 bstrd AKA M2 gone Berserk
Babelfish M25 R.2
A babelfish'd version of the FW M2. Standard parts. Different biasing scheme.
Babelfish M25 R.2/SET amp
Babelfish MF A1
A babelfish’d version of Tim De Paravicini’s classic design, minus line stage portion
MF A1 (babelfishing)
Babelfish XA252
A babelfish'd version of the XA25. SOT227 OS parts, SITs optional.
Babelfish XA252 / Babelfish XA252 SIT / Babelfish XA252 SET
Boo/Pooh
Square Law PP Follower Stage, bridged or not (which are going to drive even F4)
The marriage
Il Penitente
A complimentary BJT amp, with iron FE
Il Penitente
LuDEF
DEF amp topology w/ LU1014 power JFET
LuDEF
LuDEF P
DEF amp topology w/ LU1014 power JFET – active FE (Plethora of Pinjatas)
LuDEF P
Old Soul
Germanium output transistors; BJT outputs also possible.
Old Soul
Plethora of Pinjatas/SET P
Square law OS. ZM active FE. Standard parts. Schade option (SET)
Plethora of Pinjatas/SET P amp
Singing Bush
A variation on the SE 50W amp Nelson presented at BAF 2015. SIT version; MOSFET version w/ schade
The Singing Bush
Lazy Singing Bush
A SE 50W follower amp – mu-follower arrangement. SIT, MOS, etc
Lazy Singing Bush
Choked Singing Bush
A SE common source choked amp – USE QUALITY IRON
Choked Singing Bush ..... special one for Purists and Masochists
SissySit
DEF amp with SIT and MOSFET
SissySIT
SissySit R.3
DEF amp with SIT and MOSFET; New biasing scheme
SissySIT R.3
SissySit P
DEF amp with SIT and MOSFET; uses active FE (Plethora)
SissySIT P ..... or how I proved fact of making more Hats than Pa did
SissySit (42)
DEF amp with SIT and MOSFET; fully DC coupled; footprint for K2087
K2087 musings phase two: SissySIT 42 as a cradle
Scryer
DEF OS with single common source JFET FE; fully DC coupled; footprint for K2087
Scryer ..... or how F8 met Mighty SissySIT
Steeplejack
single common source JFET FE; M25-style OS w/ Schade FB
Steeplejack ..... or how F8 met mighty babelfish M25
Stasis OS
Newly designed Stasis OS boards
Stasis Front end
Warbler
Choke loaded source follower; SIT, MOS, or Schade MOS
Warbler MOS Schade MOS SIT choke loaded follower power amp
Pumpkin
Balanced transistor amp for swinging the likes of an F4
Pumpkin Preamp - Perfect for F4
Iron Pumpkin; Iron Turtle
Shunt reg + buffer + AVC
Iron Pumpkin(s) and other smaller vegetable animals
Iron Pre
Shunt reg + buffer + autoformer
What's wrong with the kiss,boy ?
PSM LS
Optical line stage
Poor Serbian Man
Babysitter
Easy way to cool Class A amps
Babysitter for Papa's Koan
D1 OS
I/V stage from PL D1 (Gerbers)
Pass Labs D1 Dac
Autoformer daughter cards
Handy expansion cards for integrating Cinemag or Jensen PC-mount autoformers into your project (Gerbers)
The F6 revisited
Amps
Aleph Jzm
A simplified, UMS-compatible version of the classic Aleph J.
Aleph Jzm
Babelfish F8
A dual rail, dc-coupled variation of the FW F8.
Babelfish F8
Babelfish J
A babelfish'd version of the Aleph J. Standard parts.
About possible Babelfish J interest
Babelfish XJ
A babelfish'd version of the Aleph J with SUSY (Supersymmetry). Standard parts.
Babelfish XJ , or JX …….. or whatever (Aleph X servo for Greedy Boyz)
Babelfish J2
A babelfish'd version of the FW J2. IRFP150's for the OS transistors.
Babelfish ᄅſ....or FW J2 on Steroids .... or Not your Father's J2!
Babelfish M25
A babelfish'd version of the FW M2. Standard parts.
Babelfish M25, AKA M2 on steroids, AKA M2-XA25 bstrd AKA M2 gone Berserk
Babelfish M25 R.2
A babelfish'd version of the FW M2. Standard parts. Different biasing scheme.
Babelfish M25 R.2/SET amp
Babelfish MF A1
A babelfish’d version of Tim De Paravicini’s classic design, minus line stage portion
MF A1 (babelfishing)
Babelfish XA252
A babelfish'd version of the XA25. SOT227 OS parts, SITs optional.
Babelfish XA252 / Babelfish XA252 SIT / Babelfish XA252 SET
Boo/Pooh
Square Law PP Follower Stage, bridged or not (which are going to drive even F4)
The marriage
Il Penitente
A complimentary BJT amp, with iron FE
Il Penitente
LuDEF
DEF amp topology w/ LU1014 power JFET
LuDEF
LuDEF P
DEF amp topology w/ LU1014 power JFET – active FE (Plethora of Pinjatas)
LuDEF P
Old Soul
Germanium output transistors; BJT outputs also possible.
Old Soul
Plethora of Pinjatas/SET P
Square law OS. ZM active FE. Standard parts. Schade option (SET)
Plethora of Pinjatas/SET P amp
Singing Bush
A variation on the SE 50W amp Nelson presented at BAF 2015. SIT version; MOSFET version w/ schade
The Singing Bush
Lazy Singing Bush
A SE 50W follower amp – mu-follower arrangement. SIT, MOS, etc
Lazy Singing Bush
Choked Singing Bush
A SE common source choked amp – USE QUALITY IRON
Choked Singing Bush ..... special one for Purists and Masochists
SissySit
DEF amp with SIT and MOSFET
SissySIT
SissySit R.3
DEF amp with SIT and MOSFET; New biasing scheme
SissySIT R.3
SissySit P
DEF amp with SIT and MOSFET; uses active FE (Plethora)
SissySIT P ..... or how I proved fact of making more Hats than Pa did
SissySit (42)
DEF amp with SIT and MOSFET; fully DC coupled; footprint for K2087
K2087 musings phase two: SissySIT 42 as a cradle
Scryer
DEF OS with single common source JFET FE; fully DC coupled; footprint for K2087
Scryer ..... or how F8 met Mighty SissySIT
Steeplejack
single common source JFET FE; M25-style OS w/ Schade FB
Steeplejack ..... or how F8 met mighty babelfish M25
Stasis OS
Newly designed Stasis OS boards
Stasis Front end
Warbler
Choke loaded source follower; SIT, MOS, or Schade MOS
Warbler MOS Schade MOS SIT choke loaded follower power amp
Line-level
Pumpkin
Balanced transistor amp for swinging the likes of an F4
Pumpkin Preamp - Perfect for F4
Iron Pumpkin; Iron Turtle
Shunt reg + buffer + AVC
Iron Pumpkin(s) and other smaller vegetable animals
Iron Pre
Shunt reg + buffer + autoformer
What's wrong with the kiss,boy ?
PSM LS
Optical line stage
Poor Serbian Man
Misc.
Babysitter
Easy way to cool Class A amps
Babysitter for Papa's Koan
D1 OS
I/V stage from PL D1 (Gerbers)
Pass Labs D1 Dac
Autoformer daughter cards
Handy expansion cards for integrating Cinemag or Jensen PC-mount autoformers into your project (Gerbers)
The F6 revisited
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two iterations of Babelfish J, earlier - simpler one, later one made to be scale-able
dunno, that would be it, when speaking of things finished as project
*****things to come sorta soon , being in phase of final pcb proofing:
-Il Penitente (last of autoformer gain amps, Square Law all bjt OS)
amps with P suffix, meaning active FE iteration of already known ones:
-Plethora of Pinjatas (B. M25/SET with active FE with special name, origin of series)
-Il Penitente P
-Old Soul P
-LuDEF P
-SisySIT P
****things cooking:
-Babelfish XA252/SIT/SET US
-Lazy Singing Bush
-several complete preamps, none/moderate to huge gain and swing
life is fun ........ even if I need to squeeze time, to make Kudos amps for my self, I'm obliged to make
dunno, that would be it, when speaking of things finished as project
*****things to come sorta soon , being in phase of final pcb proofing:
-Il Penitente (last of autoformer gain amps, Square Law all bjt OS)
amps with P suffix, meaning active FE iteration of already known ones:
-Plethora of Pinjatas (B. M25/SET with active FE with special name, origin of series)
-Il Penitente P
-Old Soul P
-LuDEF P
-SisySIT P
****things cooking:
-Babelfish XA252/SIT/SET US
-Lazy Singing Bush
-several complete preamps, none/moderate to huge gain and swing
life is fun ........ even if I need to squeeze time, to make Kudos amps for my self, I'm obliged to make
Yes! I was wondering what the P was meaning. I’m excited for the active stuff. And the lazy stuff 😀
P is short of Plethora, simple designation, to help with nomenclature
as I'm not already confused enough, so any help in nomenclature is welcome
as I'm not already confused enough, so any help in nomenclature is welcome
Yeah, I remember scratching my head for a long time whenever the term babysitter popped up. Finding that post helped me out a lot 🙂 Plus, I built them and they work great!
most likely Babelfish M25/SET
straightforward bolting of mosfet outputs, 2+2 simple trimpot operation per channel
Thanks, this is a good idea, is it maybe worth adding a note also of the main active devices and possibly power output at 8 and 4 ohms? Just a thought.
Zen Mod Blog – Buddha is everywhere…….
Tab always open on PC, phone, ipad
For all those other juicy projects and easy to find pics of stuff I’m trying to build
Tab always open on PC, phone, ipad
For all those other juicy projects and easy to find pics of stuff I’m trying to build
Thank you Cody, though I think it a really useful long term reference for all, I did not wish to initiate a lot of work for anybody. Maybe others could help with their findings, if they have built any of these designs, making this an ongoing thing?
No worries at all. I think I can at least include a one sentence summary for each in that first post. From there, my hope is that people can include any other ZM 'nuggets' here in in this post.
@ codyt - this is MUCH appreciated - trying to navigate ZM is like trying to tame entropy itself. 🙂 BUT we do love him so 
..dB
..dBPersonally I find ZM's designs easier to follow than most, what's also good is that they take account of parts availability. This type of information to me is desirable for any posted project be it power amp, pre amp, speakers etc etc. Many of the designs on DIYA are world class, some even world leading. It would be such a shame to loose them. Thanks to all that work so hard for the benefit of others.