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Old 1st February 2013, 08:12 PM   #81
Jozua is offline Jozua  South Africa
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Meanman1964

Any chance of a groupbuy for the output devices?

Especially if there is a specific brand that sounds better than the others.

Regards
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Old 2nd February 2013, 06:44 AM   #82
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Quote:
Originally Posted by Jozua View Post
Meanman1964

Any chance of a groupbuy for the output devices?

Especially if there is a specific brand that sounds better than the others.

Regards
Do you mean for this groupsbuy?I'm offering a parts kit with this amp yes also the output fets.I'm using the ALF08P(N)20V fets with good result other brands I don't know.I think the Exicons are the same quality.A few guys of the groupsbuy are planning to use the 2SK1058 - 2SJ162 from Renesas those are cheaper.
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Old 2nd February 2013, 09:25 AM   #83
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Default AC voltage and Heatsink questions

Hi meanman1964,
Will it work well with a 2x24Volts AC secondary transfo, or will i have to change something ?
What is the recommended heatsink's efficiency for +/- 35V DC : 1C/W, 0,7C/W, other ?
What is the size of the PCB ?
Thank You for your work.
Bye.
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Old 2nd February 2013, 11:24 AM   #84
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I'm using 2x24Vac myself only a minor setting will be different.The board size is 230mmx69mm.My heatsinks are 290mmx90mm and the temparture is max.38-40
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Last edited by meanman1964; 2nd February 2013 at 11:28 AM.
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Old 2nd February 2013, 11:38 AM   #85
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As a rule of thumb you can say: using a 1C/W heatsink means: each Watt that the amplifier comsumes will add 1C
to the existing room temperature on the heatsink.

So: if your room temperature is 20C and you play your music in a way that the amplifier consumes 40W, this will result in about 60C on the heatsink.

I always take care that a heatsink does not get hotter than 50C and therefore think that it would be better to go for a 0.5C/W heatsink.
Please find out how much wattage one channel of the FETZILLA consumes yourself.

Best regards - Rudi_Ratlos
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Old 4th February 2013, 11:56 AM   #86
Jozua is offline Jozua  South Africa
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Meanman1964

Is it possible to buy just the output devices from you.

I like to order 8 output devices- enough to build two amps.

Please send pm to me. Payment via Pay Pal?

Jozua
Cape Town
South Africa
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Old 4th February 2013, 04:13 PM   #87
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Are they for the FetZilla?
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Old 5th February 2013, 09:26 PM   #88
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The boards are on their way to me
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Old 7th February 2013, 04:51 PM   #89
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Recieved the boards today
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Old 7th February 2013, 05:20 PM   #90
billyk is offline billyk  United States
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Looking good!!
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