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Old 9th June 2003, 09:11 AM   #1
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Question to what values I should go with irfp 9610

I have just build zen v4. I can nowhere find zvp 3310 what mosfet with low capasistance like nelso said i shuld use? now I use irfp 9610. how much I should lower values of r 1,r3 original is 47.5 and 221k. I underatand that first would be 10k, but 221k. to what, nelson didnt said concrete.

and anybody has few spare zvp 3310? I would pay 5eur/each.

and my transformesr doesnt take 1.5,or2,or3 a fuses, they only take 6-8a<. not heating, no problems, but they doesnt take anything lower thatn 6A, where is a problem? they are toroids 250VA each. bypased with wima 400v. thanks for any help

good luck in projects. I am happy with zen. except bass responce and some kind of discortions, but they are friendly to my ears.
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Old 9th June 2003, 10:51 AM   #2
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I chose the Tube route when I couldn't find the ZVP's...

Makes the ZenV4 a bit more expansive though
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Old 9th June 2003, 11:11 AM   #3
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Default Re: to what values I should go with irfp 9610

and anybody has few spare zvp 3310? I would pay 5eur/each.

Send your mailing address, and I will send you 3 to get started. They are cheap from Digi-kEY in the US.

Double check those fuse sizes. It sounds like the current ratings are for the output side and not the input. With your 230 volt mains, a 1 amp fuse is close to correct. A three amp is way too large. The smoke will comer out of everything way before the fuse goes.

George
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Old 10th June 2003, 07:35 AM   #4
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Default panh

hello, I would very happy for zvp. I know they are cheap, but its matter of finding in europe.. my email is rollas@mail.lt
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Old 10th June 2003, 11:22 AM   #5
cHoc is offline cHoc  Netherlands
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Farnell sells them, but only in a SOT-23 pakage

MOSFET P SOT-23 ZVP3310F 0,56

www.farnell.com
or directly for the Italian page
http://international2.farnell.com/IT...gistered.jhtml
and search for zvp 3310 (with the spacing)
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Old 10th June 2003, 12:35 PM   #6
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Exclamation I dont even though about it!

I fuse transformers input- from 220v to transformers input, not output!
is this very bad??

my amp works without problems, so shopudI fuse tranformers output?
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Old 10th June 2003, 01:20 PM   #7
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It looks like a inrush current problem... you can find very useful posts about it using the search function

Cheers

Andrea
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