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RE: Water probe: improvements

Original poster: "Denicolai, Marco" <Marco.Denicolai@xxxxxxxxxxx>

Hi Aron,

Good suggestion. I saw they score a 1 pF capacitance and they are
germanium. I just haven't tested them under high current transients.

I do have tested the PRLL5819 I use (with a real surge generator) and
they are a lot better than any other ESD/surge protection on the market.
They are fast and they can take a lot. They are in the unsual "barrel"
case (Melf).

Best Regards

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: 5. tammikuuta 2005 00:33
> To: tesla@xxxxxxxxxx
> Subject: RE: Water probe: improvements
>
> Original poster: "Aron Koscho" <kc5uto@xxxxxx>
>
> Marco,
>
> Have you considered using low capacitance diodes to clamp the input?
> I've been using 1N34A's for some time without any problems.
> This is an interesting project you've undertaken; I can't
> wait to see how it turns out.
>
> Regards,
>
> -Aron
>
>
>
> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Tuesday, January 04, 2005 8:57 AM
> To: tesla@xxxxxxxxxx
> Subject: RE: Water probe: improvements
>
> Original poster: "Denicolai, Marco" <Marco.Denicolai@xxxxxxxxxxx>
>
>  >The original capacitance of the lower voltage arm of the
> divider is  >about 500 pF. The capacitance of the schottky
> diodes I added (one  >between input and V+, the other between
> input and V-) is 50 pF. So two  >of them makes 100 pF.
>  >I am really not confident the amplifier would last a second
> without them  >if the TC is turned on.
>
>
>
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