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building firstwatt f1 - questions on parts
building firstwatt f1 - questions on parts
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Old 13th June 2006, 04:33 PM   #21
Netlist is offline Netlist  Belgium
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Join Date: Jan 2003
55-60 is a bit high and a small silent fans will work wonders.
Water cooling works fine too, some run them with alcohol cooled devices during the winter.

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Old 16th June 2006, 10:45 AM   #22
choariwap is offline choariwap  Philippines
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bad luck, the supplier ran out of IRFP240s.. they are suggesting IRFP240PBF which is the lead free version.

will this be ok as an alternative? i've checked the net and their spec sheets are identical (the exact same file)

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Old 16th June 2006, 03:26 PM   #23
gl is offline gl  United States
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Join Date: Dec 2003
Location: Sierra Foothills - California
Thay are the same. The tinning on the pins will be different but the internal die (the important part) will be exactly the same.

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Old 20th June 2006, 06:44 AM   #24
Adams_Leo is offline Adams_Leo  China
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Join Date: Apr 2003
Location: Chengdu
Originally posted by jh6you

Compromise bias current . . . :rdevil:
The highly efficient corns still welcome lower current !!!

Where is this :rdevil: ????????????
Am I still drunk ~~~ ???

Good luck!!!

Hi Jh,I want to build the F1 power amp and I am in China.I tried to send a mail to you,but you do not wish to receive emails.Could you send a message to me.I will try to contact with you.Do you mind....?

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Old 20th June 2006, 12:55 PM   #25
jh6you is offline jh6you
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Location: Near to the Pacific Ocean
Hi Leo,

Click here to email me


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