[Amps] Re.: 500w Amplifier With IRF510's - Schematic updated

[Peter Frenning [OZ1PIF]]

I can only support Steve in this, although all I have tested have been 
within 0.1V of each other (from three different batches)

Vy 73 de OZ1PIF, Peter

**********  OZ1PIF **************
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Peter Frenning
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----- Original Message ----- 
From: "Steve Thompson" <g8gsq at ic24.net>
To: <amps at contesting.com>
Sent: Friday, April 08, 2005 11:29 AM
Subject: Re: [Amps] Re.: 500w Amplifier With IRF510's - Schematic updated


> On Friday 08 April 2005 06:23, Peter Frenning [OZ1PIF] wrote:
>> Some errors in the schematic corrected..
>>
>> > With PCB-design, Schematic and pictures plus some commentary:
>> > http://home24.inet.tele.dk/oz1pif/50MHz_IRF510.htm
> A suggestion for anyone planning to copy this - get 8 fets from one batch, 
> so
> the gate thresholds are likely to be close together. IR specify a range of
> 2-4V so a mix could end up with only some being biassed, and the others 
> being
> non-linear. After a blowup, replace the whole lot to avoid mixing batches
> (hardly expensive!).
>
> Steve
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