I tried a comon mode coke made up with 2 wires wound up togheter on a coil
at the output of a LM317 regulator and it did make big difference
Maybe is worth a try and compare impressions?
It should be doable.
I like the idea to have lesser heat on M1 and better prefiltering.
Thank you very much Salas!
Regards.
I like the idea to have lesser heat on M1 and better prefiltering.
Thank you very much Salas!
Regards.
Salas congrats for your skill and thank you for your amazing contributions. I have been reading your threads like crazy during the past few days, and I must say I am impressed of the work that you and others have put into these circuits.
At the same time I feel completely overwhelmed by information since I cannot understand everything (being a semi-ignorant diy dude), and running through the entire threads can be very tedious.
Could you please give me your opinion on using the reflektor (or any other variant of your PSUs) to power the motor of a Technics SL1200 MK2?
The turntable requires 21V at ~500mA peak.
At the same time I feel completely overwhelmed by information since I cannot understand everything (being a semi-ignorant diy dude), and running through the entire threads can be very tedious.
Could you please give me your opinion on using the reflektor (or any other variant of your PSUs) to power the motor of a Technics SL1200 MK2?
The turntable requires 21V at ~500mA peak.
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Don't know what the motor may give it for phase stability as a load, you gotta try it to see it will do OK, since nobody had used on MK2 before so to tell you what's gonna happen. The Reflektor is the simplest to make and gives steady voltage easily. Use 1 Ohm R1 and BF245A without source resistor if you haven't got K170. No more than 30Vin and 2C/W common sink for the (insulated) Mosfets.
I expected something like that about the motor. I tried to edit the post to make a correction but the 30minutes had passed 🙂
I do not plan to power the motor directly. More of its driving circuit instead, so I don t think it would be much of a problem as a load.
I found a big bunch of 2SK170BL yesterday rated at between 6 and 10 mA so I guess I ll be fine using them (I hate waiting for stuff....)
I do not plan to power the motor directly. More of its driving circuit instead, so I don t think it would be much of a problem as a load.
I found a big bunch of 2SK170BL yesterday rated at between 6 and 10 mA so I guess I ll be fine using them (I hate waiting for stuff....)
Hi Salas,
Can you suggest me which one Shunt reg suitable for Pumpkin Pre-Amp (+/- 24V, 150mA) and for Aleph 1.7 (+60V, 200mA)?
Didiet
Can you suggest me which one Shunt reg suitable for Pumpkin Pre-Amp (+/- 24V, 150mA) and for Aleph 1.7 (+60V, 200mA)?
Didiet
My (actual) Salas is better than your (simmed) Salas:
An externally hosted image should be here but it was not working when we last tested it.
Salas BIB with IRF HexFETs.
With how much CCS current? Standard bib 9610,9530,Zobel termination? Looks like there is more Gfs and Ciss than in the shunt hexfet model? *7mOhm was referencing the reflektor
Yes, I plan on just replacing the regulator and the transformer/filter. I will still use the normal control and drive circuitry
Unloaded it runs 280mA, the load is 150mA, injected current was 50mA -- the level Walt Jung used for his 1995 articles...and yes, the Zobel termination was used.
Very good practical result on AP indeed. Without ''hot-rod'' spare current conditions even. Did you check noise if with a >=220uF Vref filter capacitor?
edit. Here is my bib simulation with your CCS/load settings. Repeating your Audio Precision real measurement for easy check.
edit. Here is my bib simulation with your CCS/load settings. Repeating your Audio Precision real measurement for easy check.
Attachments
You are right, the measurement shows less climb rate beyond audio range. Measuring very near but even better than simulating, is a good thing. Chuffed.
1.1 bib, or reflektor, and for +60V the Krivium reflektor (#4797 change R4 to 10K, R1 to 1R8).
Hi Salas,
While you're on the recommending subject, what versions recommended for the 1541A dac chip (-15v, -5v, +5v - all about 30mA) and Kwak clock (+/- 15v - 20mA)
I did get a number of the DC B1 (Hypnotize) pcbs for this project but perhaps a simpler set?
Thanks.
While you're on the recommending subject, what versions recommended for the 1541A dac chip (-15v, -5v, +5v - all about 30mA) and Kwak clock (+/- 15v - 20mA)
I did get a number of the DC B1 (Hypnotize) pcbs for this project but perhaps a simpler set?
Thanks.
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