Recent content by parac-EU

@Baluncore I am sad to see that you keep hammering this subject so no one will even try a radio astronomy project. Please stop that. cryo needed? realy; do some more googling. From your username I presume that you are a 27MHz Radio HAM; (there is no core above 1000MHz); [Insult deleted by the...

Other good examples of home radio astronomy projects were done by the late Job Geheniau. His website is available on https://jgeheniau.wixsite.com/radio-astronomy He steered his 1.5m mesch dish remotely via internet. Here are a few project examples: 16 High Velocity Clouds Hydroxyl maser...

forgot to add

The very first time I could detect hydrogen with an antenna I was amazed and overjoyed. That is why I offer,whoever want to do likewise, my support. Dont build complicated systems; just start simple and have success. I have repeated the project http://parac.eu/projectmk9.htm I am now in...

Ps; That horn is not my design. I am not the author of that paper. I am the person who is mentioned (about) 10 times.

You do not need an RF switch. The plot indicates that frequency shifting is used. You compare "on" the bump with "off" the bump. For stability; just enable the Automatic Gain Control on the SDR# gui. Later you can experiment with all other settings.

You said that you were not successful with your method. So, just try our method. If still sceptical, read att paper written by Jon Wallace (SARA).

We used no dish and no low noise amplifier; just a bucket as shown in the picture. The project description can be found on http://parac.eu/projectmk9.htm

Ha, another one, this is what I said: "In this link there is again the denying of the possibility to receive neutral hydrogen 21cm signals when not using parabolic dishes. This is simply false."

the admin just posted a link to me https://public.nrao.edu/ask/galactic-hydrogen-measurements-with-a-software-defined-radio-sdr-receiver/ In this link there is again the denying of the possibility to receive neutral hydrogen 21cm signals when not using big parabolic dishes. This is false...

I found this forum and clicked on the item. I was sad to see that some people were so negative about receiving radio astronomy signals. See below picture of a minimal bucket antenna in the backyard of a house in a city in the Netherlands. Also a result plot is given. This can also be a setup for...