I have the Legato I/V Vref 10uF Auricap & Zobel MKT+R
so I have all well configured, thanks Salas.
For the servo circuit of a CD transport I have to consider digital ?
PS I used Vishay SK102 1R that I had on hand for Zobel resistor & the sound changed to better a lot, the zobel cap is also sensitive?
so I have all well configured, thanks Salas.For the servo circuit of a CD transport I have to consider digital ?
PS I used Vishay SK102 1R that I had on hand for Zobel resistor & the sound changed to better a lot, the zobel cap is also sensitive?
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Thanks for the replys. I'll detail a little where I am and the exact nature of the problem.
I've a positive and negative reg, both populated with the same values in all equivalent positions. The target voltages are +\- 15V. The negative reg is working roughly as expected, however the positive reg is only at ~10V
R101 - 5R
Vref - 2xRed Led, R103 - 2kR, Trimmer 500R
D102, 103, 104, all green led's
Everything else is as specified in the Guide.
Attached is a pic of the calculator used to generate the values and a shot of the regs. Any help is appreciated.
...is it potentially the idss of Q103 causing the issue? I did not measure this before populating the board.
I've a positive and negative reg, both populated with the same values in all equivalent positions. The target voltages are +\- 15V. The negative reg is working roughly as expected, however the positive reg is only at ~10V
R101 - 5R
Vref - 2xRed Led, R103 - 2kR, Trimmer 500R
D102, 103, 104, all green led's
Everything else is as specified in the Guide.
Attached is a pic of the calculator used to generate the values and a shot of the regs. Any help is appreciated.
...is it potentially the idss of Q103 causing the issue? I did not measure this before populating the board.
Attachments
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Looks its the idss. Lift R103's one leg in the positive. Add some resistance from lifted leg to its former pad. See if it gives you more range. Use a single equivalent value you will end up with by that experiment.
Hi i am currently testing out a CD-rom as my new drive, it sounds swell and beats my upgraded Sony XDP-5000 quite a bit , better bass and more natural sound despite that im running a computer smps
for ps.I tried a BIB but since the CD-rom draws from 400ma - over 1a both for the 5v and 12v the BIB fails to deliver the current,
I suppose i could have hotrodded the BIB to deliver over 1A but it only draws that in startup, and i guess the sinks for the mosfets must be very huge, i have very large sinks and it still it gets to hot @ 800ma shunt current.
My solution will be some cheap lm317 regs and upgrade with better caps, or i might skip the LM317 since the CD-rom has an on-board V-reg, when i find the spec for the on-board reg and if it can handle some voltage fluctuations i might go for a ultra simple linear supply for better dynamic.
Long introduction but heres the Q:
Have you measured the startup current and constant current for your drive?
You might run into similar prob. as me
P.
I have no idea about the transport.
I will try default configuration for digital Vref 220uF + Zobel MKT+R to see what happens.
Attached pic with two +-30V BiB regs to power a NP classic D1 I/V, digital is receiver Crystal 8414 filter BB DF1704 DAC BB PCM1704 powered with Erno Borbely series regulators. Transformers in a separate box, for I/V two R-Core 2x30V 120VA, one per channel.
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Because the Zobel resistor ups the ESR anyway. If you can hear differences use more expensive caps by all means. I can't be recommending $$$ caps to everybody, its a contentious area.
When the load current varies so widely its not a good idea to use a CCSed reg like the BIB energy wasting wise as you have found. It idles for high speed like a turbine engine. Best energy management for setting such is when you have a steady or narrow area current demand.
I like your spreadsheet. Can you post it?
Are the diagrams and such like incorporated in the spreadsheet?
what do you mean when telling digital Vref 220 uF ?
Interesting setup
you are powering only Pass I/V with Salas BIB regulator and everything else with EB serial regulators ? what Is your output voltage fed to Pass I/V what Is your current through CCS ?
I believe it was Lazybutt and I think first time he posted it was here - http://www.diyaudio.com/forums/power-supplies/192625-sslv1-1-builds-fairytales-91.html#post2861878