Wide Band Noise Source

On Mon, 10 Feb 2014 18:55:21 +1100, mhenderson@unitrans.com wrote:

This looks like an interesting option. Designed for continuous
operation and rated at 7W. Price is right.

http://www.ebay.com.au/itm/121270618857?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

Mark Henderson

Oops. This was supposed to go to the Walkie Talkie thread. I will
resend to there.

Sorry.

Mark

 

On Mon, 10 Feb 2014 15:10:37 -0800, John Larkin
<jlarkin@highlandtechnology.com> wrote:

https://dl.dropboxusercontent.com/u/53724080/Noise/BFT25_zener_noise.zip

Looks like about 25 nV/rootHz. Mediocre.

Thanks John. That will given me a benchmark to aim for.

Mark Henderson

 

[John Larkin]

On Tue, 11 Feb 2014 10:43:12 +1100, mhenderson@unitrans.com wrote:

On Mon, 10 Feb 2014 15:10:37 -0800, John Larkin
jlarkin@highlandtechnology.com> wrote:


https://dl.dropboxusercontent.com/u/53724080/Noise/BFT25_zener_noise.zip

Looks like about 25 nV/rootHz. Mediocre.


Thanks John. That will given me a benchmark to aim for.

Mark Henderson

You might look up noise diode datasheets from Noisecom and their
arch-rival Noisewave.


--

John Larkin Highland Technology, Inc

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[Robert Baer]

mhenderson@unitrans.com wrote:

I have seen plenty of published circuits for audio frequency
white/pink noise generators.

What is involved in producing noise up into the low GHz region?

I don't care if it is flat, or other expensive things, so long as it
is of sufficent strength for equipment testing.

Mark Henderson
A spark gap can be good from DC to light...

 

[Adrian Tuddenham]

Robert Baer <robertbaer@localnet.com> wrote:

mhenderson@unitrans.com wrote:

I have seen plenty of published circuits for audio frequency
white/pink noise generators.

What is involved in producing noise up into the low GHz region?

I don't care if it is flat, or other expensive things, so long as it
is of sufficent strength for equipment testing.

Mark Henderson
A spark gap can be good from DC to light...

I believe one Marconi noise generator used a mercury contact in a
mechanical trembler circuit as its noise source.


--
~ Adrian Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk