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Old 11th February 2011, 05:04 AM   #1
GregH2 is offline GregH2  Australia
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Default VN10KM mosfet

Hi All,

Just wondering if the VN10KM fet would be usable for a single ended common source class a input stage similar to a BOZ preamp stage? I was thinking of biasing it at 10mA or so, which for my application will dissipate about 0.25W.

You can see a datasheet here:

http://myweb.msoe.edu/~muthuswamy/ee...ab1/vn10km.pdf

It has a gate-source zener built in and drain-source reverse diode protection and I'm not sure how this would affect things?

The gate protection would be useful in this application. I assume the drain-source diode would be a non issue as the fet shouldn't see any reverse polarity in this application. Any thoughts? I haven't seen it used in audio anywhere. Any reason why not?

Thanks,

Greg.

Last edited by GregH2; 11th February 2011 at 05:08 AM.
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Old 11th February 2011, 02:56 PM   #2
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I think it would work fine, just observe the voltage and
current limits.

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Old 11th February 2011, 10:21 PM   #3
GregH2 is offline GregH2  Australia
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Great, thanks Nelson.

Greg.
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Old 11th February 2011, 11:03 PM   #4
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I seem to recall this device being used in 1~2 watt QRP transmitters for 80m, so I think it's quite hot, you might want to be careful about HF oscillation.

w
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Old 20th September 2011, 04:44 PM   #5
marconi is offline marconi  Europe
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Default VN10KM

As to the drain source diode; this is an inherent part of the mosfet, due to the production technique. Every mosfet has it...

Rgds
Marcel
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