So I see more OLG with the smaller cap, but the difference is small.
As for Phase, it also looks similar... In the smaller cap it is not so steep.
What subjective differences should I look for (soundwise)?
As for Phase, it also looks similar... In the smaller cap it is not so steep.
What subjective differences should I look for (soundwise)?
Comparing 1uF to 47nF
In the 47nF I see more OLG (a good thing)
I also see a gentler phase shift in the audible range.....
In the 47nF I see more OLG (a good thing)
I also see a gentler phase shift in the audible range.....
There are two main observations. One is If we expand the OLG, the phase turn begins later. The other is it turns more viciously later on. With the 1u capacitor overall phase is smoother, does not skip zero point phase magnitude before it. Amplifiers reflect heavily on their hi-band behavior of stability and extension, plus what happens lower has its impact too. Not to mention after real parts, wiring, and layout, watching those sims is mainly academic. What counts for an experimenter is to keep stable and be happy subjectively. I can not possibly glean such refinements from sim graphs beyond alarming. So I prefer to recommend the conservative values for start. We don't know what happens in different layouts and load combinations yet. Looks like it can afford smaller C1 for now, possibly opening up also, and that's good practical feedback. Keep on reporting.
Bypassing the MKP on the vref zobel with a 15nF teflon, brings really big inprovements in the trebble region.
I will try latter with other values.
I will try latter with other values.
I already did it in my Salas phono V1.2R regulators for my Symplistic NJFET RIAA, I used 15nF USA teflon😉
Where did you use the 15nF Teflon merlin ?
Bypassing Vref caps? What caps are you using there ?
Bypassing Vref caps? What caps are you using there ?
100nF FT-3 Vref & 15nF USA zobel cap, 4,7uF 400V Vref & 4,7uF 400V Zobel both are MKP not boutique, bought to Apex Jr. marked NPTM
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Hi Merlin
Would you post your v12r schematic ?
It seems it is different from what I am using 🙂
Would you post your v12r schematic ?
It seems it is different from what I am using 🙂
RFLKTR report.....
After many experiments (as usual) and critical listening tests, I decided to use 0.047nF on the output zobel. The polystyrene on Tin Foil has a distinct sonority that I really like. Not so strong presence as an Auricap, with very good extension but not steryle as an FT-1.
In the Vref, I am using a nonpolar 680uF EL bypassed with a zobel... In this case I opted for a 4u7 MKP bypassed with the FT-1.... resulting in very good extension but keeping the agreable low mid, high bass presence I lacked with the 1u or even 3u3 I experimented with.
IMO the output combo deals with speed and detail, The Vref combo deals with bass and presence presentation.
After many experiments (as usual) and critical listening tests, I decided to use 0.047nF on the output zobel. The polystyrene on Tin Foil has a distinct sonority that I really like. Not so strong presence as an Auricap, with very good extension but not steryle as an FT-1.
In the Vref, I am using a nonpolar 680uF EL bypassed with a zobel... In this case I opted for a 4u7 MKP bypassed with the FT-1.... resulting in very good extension but keeping the agreable low mid, high bass presence I lacked with the 1u or even 3u3 I experimented with.
IMO the output combo deals with speed and detail, The Vref combo deals with bass and presence presentation.
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