It's D110 on PCB6. After removing D110 the 7081 read about +2.5
microvolt with the input shorted with an external jumper. When I
shorted the HI amp input with the MYTCHETT test point the 7081 read
about -1.0 microvolt with low noise. I expect that the D101 (DPAD1) is
the culprit.
Presently:
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As a matter of interest which particular diode is causing these symptoms?
On 31 October 2014 15:18, Todd Micallef wrote:
> Charlie,
>
> Calogic appears to sell directly, they may even send you a sample. I guess
> it wouldn't hurt to ask.
>
> Todd
> ___
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Hi All,
I'm working on something that requires a stable voltage reference.
Long term stability isn't needed, but good thermal stability is. In
other words it would be nice to have sub ppm/C temperature, but a few
ppm/month or even per day isn't an issue.
Anyway, it got me thinking about building
Charlie,
Calogic appears to sell directly, they may even send you a sample. I guess
it wouldn't hurt to ask.
Todd
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Littlediode is no more. The only other ebay seller has been caught
re-branding and selling used as new. I have been looking at pico amp
reverse cxurrent diodes that are still being sold and have not founds
any that favorably compare with the DPAD1. The DPAD1 is only being sold
by one source as
I bought from Little Diode around 10 years ago, a variety of RF
transistors similar to and including 2N3866 with the specific intention of
comparing
them for suitability in LF/HF active antennas.
However all the devices they supplied looked to have been rebranded from
the same generic stock,
I might be worth asking eBay vendor LittleDiode, they are the eBay shop for
LittleDiode Components ...
Regards,
David Partridge
-Original Message-
From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Black
Sent: 31 October 2014 00:09
To: volt-nuts@febo.com
Subject: [v
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