M Audio nova circuit info

[Lucbl14]

Hello my name is Lucas and I'm new to the forum. My Nova microfone lost it's solder and became loose. I sent to the repairs but they aren't sure which cable should be connected where (since doing a wrong connection could potentially fry it when I turn the phantom power on)
Does anyone here can share a schematic of the XLR output and where which cable should be wired?
Thanks in advance

 

[Khron]

Try this for starters:

https://groupdiy.com/threads/maudio-nova-circuit-mod.78827/
But... Just what the hell happened, that all the wires(?) broke off???

 

[k brown]

Never heard of anything 'losing it's solder' (?)

Maybe more (rephrased) info and pic would help.

 

[Lucbl14]

Try this for starters:

https://groupdiy.com/threads/maudio-nova-circuit-mod.78827/
But... Just what the hell happened, that all the wires(?) broke off???

I am not so sure myself. I left it connected for the past 2 years and when I tried to disconnected it, the XLR connector got loose and the solder broke off.
I'll try to use these schematics, thanks for the quick answer

 

[LevinGuitar]

Try this for starters:

https://groupdiy.com/threads/maudio-nova-circuit-mod.78827/
But... Just what the hell happened, that all the wires(?) broke off???

That made me update the KM84 mod schematic

 

[LevinGuitar]

BTW I still have no idea about the ratio of the ofiginal transformer. It measures something close to 5:1 in resistance (not inductance), but with a KM84 circuit or without the pnp section it sound really bad

 

[Voyager10]

Attached is a quick photo of the XLR wiring on mine. This is a through-hole version, with 2 circuit boards. (Looks like there's also a surface-mount version with just one PCB and fewer wires).

Pin 1 black / ground. Pin 2 yellow & white. Pin 3 red & green.

Transformer ratio is about 3.8:1 IIRC, most other versions of this circuit (e.g. MXL 2001) are 1.8:1.

 

[rock soderstrom]

Attached is a quick photo of the XLR wiring on mine. This is a through-hole version, with 2 circuit boards. (Looks like there's also a surface-mount version with just one PCB and fewer wires).

Pin 1 black / ground. Pin 2 yellow & white. Pin 3 red & green.

Transformer ratio is about 3.8:1 IIRC, most other versions of this circuit (e.g. MXL 2001) are 1.8:1.

great info

but with a KM84 circuit or without the pnp section it sound really bad

Bummer, I still have one lying around and wanted to try it with a KM84 circuit. What do I do with it now?

 

[LevinGuitar]

Rewire? I'm not sure if it's worth for the laminations, guess it's not the best alloy

 

[rock soderstrom]

Rewire? I'm not sure if it's worth for the laminations, guess it's not the best alloy

That could be an exciting project. It would be my first...or maybe I'll try the transformer in a cathode follower circuit?

 

[Memo Solis]

Hi, we need Avalon Vt747sp servicemaual/schematics

 

[Khron]

Hi, we need Avalon Vt747sp servicemaual/schematics

... And why exactly would you post this in a thread about an M-Audio microphone???

 

[LevinGuitar]

That could be an exciting project. It would be my first...or maybe I'll try the transformer in a cathode follower circuit?

Maybe still too low for the standard ecc81 cathode followers, but the nuvistor tube C12a used a similar low ratio transformer right?

 

[rock soderstrom]

Maybe still too low for the standard ecc81 cathode followers, but the nuvistor tube C12a used a similar low ratio transformer right?

Yes, the CF Royer mod also comes to mind.