990/2520 compatible DOA's

[OneRoomStudio]

There seem to be new DOA designs popping up every day now, which is fantastic, but also difficult to keep track of. Even the DOA META here is getting difficult to navigate. I'm hoping to put together a somewhat-exhaustive list of all 990/2520 compatible DOA's. I'm especially interested in designs that fit the footprint but are based on different designs. Let's keep this to opamps that are available in either kit or assembled form (not just ideas/prototypes).

2520
(There are dozens in this category, but here are some that I can think of)
API 2520 (Melville/Huntington/Modern)
Avedis 1122
Gary Barnett's gar2520
Scott Liebers Labs SL2520 (red dot/blue dot)
JLM JLM25HV
JLM JLM25HVFET
Sound Skulptor SK25
Seventh Circle Audio SC25
Peter Lazaro LAZ25
Whistle Rock Audio ML2520
Whistle Rock Audio RED-25
FiveFish Audio DOA-12
PPA APP2050

1731
Melcor 1731
Lindell Audio Vintage OPA
FiveFish Audio DOA-17
Gary Barnett's gar1731
Warm Audio x731

990
John Hardy 990c
JLM JLM99V
Sound Skulptor SK99
Hairball/MNATS DIY990

918
Gary Barnett's gar918
Whistle Rock Audio ML918
Whistle Rock Audio BLU-18
Warm Audio x18

AM-10
Quad Eight AM-10
Seventh Circle Audio SC10

"Neve-ish"
Purple Audio KDJ4
Hairball/Eisen BA512

"LA-3A-ish"
Hairball/Eisen Raindog

Other
Inward Connections VF600
NTP M100
PPA APP14GE
PPA APP992
MCAudioLab 816
Yamaha NE 80200
Neumann OA10
UREI Mod1
Weiss OP1-BP


Any others?

 

[iprovlek]

Neumann OA10 from Audiox

 

[living sounds]

UREI Mod-1


Is there a Neve-ish DIY-Op-Amp?

 

[OneRoomStudio]

Thanks for pointing those two out, I wasn't familiar with them! I added them to the list above.

Is there a Neve-ish DIY-Op-Amp?

Not DIY per-se, but you can buy these to use in other projects: http://www.hairballaudio.com/catalog/parts-store/discrete-op-amps/ba512-discrete-op-amp

 

[mikeyB]

what about the hybrid and adaptor boards? I can see JLM have an hybrid opamp as does classic api
JLM hybrid
V8 opamp
Capi ic doa
Capi BB2521

 

[Samuel Groner]

Bigger PCB but same basic footprint: http://weiss.ch/products/op1-bp

Samuel

 

[ppa]

These ones are new design (my own projects)

PPA APP14GE
PPA APP992

and available in kit form

app14ge is a germanium DOA with mixed vintage and modern design.

app992 is new modern DOA with FET pairs on ins.

Pier Paolo

 

[ppa]

APP2055 is an inedit design but is not available in kit form,
it's a FET input DOA.
I have discontinued it when I have put on the market the APP992 for the internal competition that this DOA did with the APP2055.

 

[OneRoomStudio]

APP2055 is an inedit design but is not available in kit form,
it's a FET input DOA.
I have discontinued it when I have put on the market the APP992 for the internal competition that this DOA did with the APP2055.

Thanks for the info! I'll update the list.

 

[Davo]

Forsell 992 and 993... if you can find em