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Old 1st December 2007, 01:58 AM   #311
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Quote:
Originally posted by jupiterjune
............... although this doesn't explain why it doesn't seem to happen at lower frequencies for the same output voltage.

.......

JJ

capacitance of gain (lower) mosfet isn't so critical in lower part of spectrum
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Old 9th December 2007, 10:21 AM   #312
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It's gone quiet with the LU1014 discussion ......

How about also using cascoded LU1014 for the Aleph current source ?
Suggestions, pros & cons, ..... ?

Choky ??


Patrick
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Old 9th December 2007, 10:32 AM   #313
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Quote:
Originally posted by EUVL
It's gone quiet with the LU1014 discussion ......

How about also using cascoded LU1014 for the Aleph current source ?
Suggestions, pros & cons, ..... ?

Choky ??


Patrick

sorry Patrick ..... I'm these days sorta overwhelmed with daily things (and :Pumkin: thing ), in a way that I even started shutting off my cell , to preserve some time for work ........
just here and there I have time to turn to pc .......

I think lately about that third (neg to neg ) rail ...... and concluded that I can't see more elegant and simpler way of doing that .
how to make that DC-AC converting , that's another issue , with more than just one solution ......

regarding LU in CCS , I think about that too, but I'm not completely sure that we'll gain something with that........ but - only real test can conclude or exclude that variant

I just don't have 'nuff time ., for now.....
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Old 10th December 2007, 03:09 PM   #314
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Hello there!

Just a quick question. Are there any other equivalent replacements for ZTX450 and ZTX550. They are rather difficult to source around here.

Thanks.

Wachara C.
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Old 10th December 2007, 04:35 PM   #315
CfM is offline CfM  Germany
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Default -IN

Hello,

I just compared the Aleph J-schematic to other Aleph schematics. I was wondering why the -IN of the Aleph J is not connected to GND via a xx-K resistor, as in all other Alephs.
Is this one of the special tweaks (which I don't understand) or just a fault in the schematic.

Greetings,
Chris
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Old 10th December 2007, 05:05 PM   #316
EUVL is offline EUVL  Europe
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> Are there any other equivalent replacements for ZTX450 and ZTX550 ?

Please check the original Aleph-X thread.
(For NPN, MPSA18, BC550, etc.)


Patrick
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Old 10th December 2007, 11:59 PM   #317
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Default Re: -IN

Quote:
Originally posted by CfM
Hello,

I just compared the Aleph J-schematic to other Aleph schematics. I was wondering why the -IN of the Aleph J is not connected to GND via a xx-K resistor, as in all other Alephs.
Is this one of the special tweaks (which I don't understand) or just a fault in the schematic.

Greetings,
Chris
Chris, please check post #269 and 270...
Aleph J Schematic

In simulation a 221k to GND raises the Gain by 1dB (for a more comparable 20dB Gain like original Alephs) and cleans up the simulated output waves in balance mode.
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Old 11th December 2007, 03:45 PM   #318
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Default Re: Re: -IN

Quote:
Originally posted by Blues
Chris, please check post #269 and 270...
Thank you, Blues. I should have seen ...

Greetings,
Chris
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Old 12th December 2007, 12:27 PM   #319
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Thanks EUVL for your reply.

May I ask other questions? What is the suitable power rating for the transformer? Is a power supply with CRCRC filters be enough for this circuit?

Wachara C.
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Old 12th December 2007, 01:42 PM   #320
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Quote:
Originally posted by chinsettawong
Thanks EUVL for your reply.

May I ask other questions? What is the suitable power rating for the transformer? Is a power supply with CRCRC filters be enough for this circuit?

Wachara C.

450VA as minimum for stereo PSU ;


CRCRC is certainly good enough , but don't go much above 0R22 per R
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