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From: "Phil Allison"
References: <email@example.com> <firstname.lastname@example.org> <7a9M9.6086$jM5.email@example.com>
Subject: Re: Audio noise in diff amps
X-Newsreader: Microsoft Outlook Express 5.50.4522.1200
Date: Fri, 20 Dec 2002 00:11:47 +1100
NNTP-Posting-Date: Thu, 19 Dec 2002 23:59:53 EST
Organization: Telstra BigPond Internet Services (http://www.bigpond.com)
"Rick" wrote in message
> Phil Allison wrote:
> > ** If you can supply me some of those energy delivering resistors
> > have a few small projects that I can power with them.
> Bad news, I'm afraid...I'm only half way there: Sadly those energy
> -delivering resistors all also absorbing energy. All the time.
> It's what being in thermal equilibrium is all about.
> I'd love to hear what you think is inside this clever Fluke meter that
> measures noise voltage WITHOUT drawing any current whatsoever.
** Where did you get that one from ??
I expect the Fluke "dBm range" is just like the normal AC volts
ranges but with the reading computed to dBs referenced to 0dB = 0.775 volts.
In fact the OPs reading of -74 dBm (or 154 uV ) is pretty
sensitive for a small DMM - I wonder how much of that reading is actually
> > I also need some zero foward drop diodes for the rectifier - any ideas
> Look up where your sourced your "stasis resistors" from and flick to
> the "impossible semiconductors" section of the catalogue.
** I understand the "impossible" semiconductors are on long back
order with Farnell and take ages to arrive.
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