Including heatsink type/preference as I usually make them so that you mount the heatsink on the sides of the PCB for cm transistor/regulator transistor/to220 diodes. I used LEDs as Vref in my measurements, but for higher Vout you should use Zener as Vref.Īny suggestions are welcomed for the dual board. Also for higher voltages it should be really close to -160dB for PSRR. The positive version simulates a bit better PSRR than I measured, but as I said might be due to the MJE15032 I have. I think I'd use the first circuit as it's a bit uncommon with the positive feedback. With BC337/BC327 seems the negative versions have lower noise. For lowest noise I think any would do as they should be similar with the ZTX in the denoiser circuit. If you want more PSRR then the capacitance multiplier versions can help with that. I have to order both the MJE15032/MJE15033 and ZTX small BJTs for denoiser circuit, as I suspect my MJE15032 has some issues, it underperforms in both circuits where the other transistors measure more or less like the simulation. I attached a photo of it, and the latest version for it can be found here:ĭ-Noizator: a magic active noise canceller to retrofit & upgrade any 317-based V.Reg.įor dual secondary transformers I suggest you use the same supply with output connections inverted for the negative version, or maybe you do two negative versions with inverted connections on the positive. You can also use it with a center tapped transformer with normal diodes. The dual version I did for LM3x7+dienoiser has the option to use a single secondary transformer for both rails, in which case you'd use TO220 diodes.

Denoiser 2 review