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Old 18th March 2007, 12:03 PM   #91
farl is offline farl  United Arab Emirates
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Join Date: May 2005
Location: Dubai, UAE
Can i use 15000uf for C1 (output caps) instead of 10000uf. I have this one from my Marantz receiver power supply and I want to use it. It is Elna for audio 15000uf 63V.

Thanks
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Old 18th March 2007, 11:47 PM   #92
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Location: Sydney
Quote:
Originally posted by thomaseliot
/snip

TRANSFO "R" 500VA 2X36V

This is what I would have bought. Discovered too late...
That looks like a very nice transformer, any idea who makes them - I need a 240V version
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Old 18th March 2007, 11:56 PM   #93
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Quote:
Originally posted by vatofale
That looks like a very nice transformer, any idea who makes them - I need a 240V version

Just click on the blue link in your post.

Here are manufacturers


http://www.kitamura-kiden.co.jp/english/products_e.html

http://www.custommag.com/products/r-core.shtml

http://www.rn-core.com/english/products/sort285.asp



Quote:
Originally posted by farl
Can i use 15000uf for C1 (output caps) instead of 10000uf. I have this one from my Marantz receiver power supply and I want to use it. It is Elna for audio 15000uf 63V.
I remember somebody have used 15.000uF.
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Old 18th November 2008, 05:32 AM   #94
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I've a question about Q5(ZTX450)what replacement can I use without changing values of other components but when it's needed what need to be changed?
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Old 18th November 2008, 07:21 AM   #95
Formerly "jh6you". R.I.P.
 
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Quote:
Originally posted by meanman1964

I've a question about Q5(ZTX450)what replacement can I use without changing values of other components but when it's needed what need to be changed?



Any small signal npn tr satisfying the followings is useful:
  • The same leg marks (ref. to the attached figure)
  • Max. Vceo rating greater than 30V
  • Max. power dissipation rating greater than 600mW
  • Min. dc current gain of 25 or greater (min hFE of ZTX450=100)
  • Similar physical size as ZTX450
  • The black-color body

I have used KSP42 with success.

Cheers,

Attached Images
File Type: jpg ztx450.jpg (20.7 KB, 438 views)
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Old 18th November 2008, 05:06 PM   #96
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Do the output fets need to be matched?
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Old 18th November 2008, 07:27 PM   #97
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Join Date: Jul 2004
Location: Toronto, Canada
Quote:
Originally posted by Babowana




Any small signal npn tr satisfying the followings is useful:
  • The same leg marks (ref. to the attached figure)
  • Max. Vceo rating greater than 30V
  • Max. power dissipation rating greater than 600mW
  • Min. dc current gain of 25 or greater (min hFE of ZTX450=100)
  • Similar physical size as ZTX450
  • The black-color body

I have used KSP42 with success.

Cheers,

Thanks for this information Babo. I always feel ripped of for whatever reason when I use ZTX450 and ZTX550, so if I can use 2N5088 (npn and fits all the criteria you mentioned) I'll try it.

ZTX450 is about 8-10x more money than the 2N5088 at digikey

Thanks and good to see you up and about
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