That's true Stefan and I now see the point you were making. My response was
mistaken in thinking you had not heard of the IN4007's PIN function. Sorry.
Bill
----- Original Message -----
From: "Stefan Trethan" <stefan_trethan@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Wednesday, June 22, 2005 4:56 PM
Subject: Re: RE : [Homebrew_PCBs] Unipolar stepper motor driver wiring
> On Wed, 22 Jun 2005 01:55:06 +0200, Bill Maxwell <wrmaxwell@...>
> wrote:
>
>> Using IN4007 diodes as pin diods is a quite a well known ham radio trick
>> Stefan.
>> Bill
>
>
> I am not into radio, but i thought a PIN diode is used to get a variable
> capacity by changing the bias point.
> This does NOT require a fast diode, the bias is changed quite slowly.
> I do not doubt it can be used as pin diode, but this does not make it a
> fast diode.
> a 1n4007 is a slow mains frequency rectifier diode.
>
> ST
>
>
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