Pastel 2N6429

[Morbidpale]

Just rabidly ordered the pastel preamp pcb. But now I'm looking around and don't see where to buy the 2N6429's. Is there an equivalent transistor?

 

[Nostradoomus]

this, probably...should have been slightly less rabid

2N6428 NPN BJT Transistor - PedalPCB.com

NPN BJT Transistor

www.pedalpcb.com

 

[Morbidpale]

Thanks. Next time I'll take a breath, check in with a loved one, then plan my order.

 

[Many__Of__Horror]

SMD Version is MMBT6429.
Looks like the 2N6428 that PedalPCB sells is lower gain in the datasheet vs the 2N6429. No idea if that matters in this circuit however.

 

[Jakubazookas]

Would MPSA18 work here?

 

[Robert]

Would MPSA18 work here?

I used MPSA18 and updated the build doc this morning to list those as a substitute.

Looks like the 2N6428 that PedalPCB sells is lower gain in the datasheet vs the 2N6429. No idea if that matters in this circuit however.

Those are for the Trademark Fuzz.

 

[Jakubazookas]

I used MPSA18 and updated the build doc this morning to list those as a substitute.

Awesomeness. You are the king.

ETA: Deaf Boyardee is the greatest name of all time.

 

[rossbalch]

Hey folks. On GroupDIY it's mentioned the BC549C (which I already have a bunch of) works in Neve preamps. Would it work in the Pastel too?

Replacements for BC184C transistor?

I bought 400 BC550C (I know, you win) and they have between 400 and 500, some have little more but non over 600, maybe I'm in the wrong country and they send the worst for here... Too bad for me. JS I found that some multimeters shows different values of HFE. I did comparision of three...

groupdiy.com

 

[rossbalch]

Hey folks. On GroupDIY it's mentioned the BC549C (which I already have a bunch of) works in Neve preamps. Would it work in the Pastel too?

Replacements for BC184C transistor?

I bought 400 BC550C (I know, you win) and they have between 400 and 500, some have little more but non over 600, maybe I'm in the wrong country and they send the worst for here... Too bad for me. JS I found that some multimeters shows different values of HFE. I did comparision of three...

groupdiy.com

Anyone know the answer to this?

 

[jwin615]

Anyone know the answer to this?

Should be fine
Doublecheck the pinout as I think they're mirrored (mpsa18/549)

 

[rossbalch]

Follow up questions. Are the values in the circuit tuned to the 2n6429 specifically? I see a lot of the values match the original Neve circuit but not all of them.

 

[jwin615]

Some will inherently be very different because of the different supply voltage

 

[PAGOON]

Would MPSA18 work here?

I noticed that mpsa18 didn’t have the unique sound that the pedal should have. So I swapped back to the 2n6428.