Scope in a box

[Conrad Cardano]

Hi

Is this available or are they still waiting for the LNA?

[Alex P]

LNAs are now in stock...

https://www.nooelec.com/store/sdr/sdr-addons/sawbird.html

Do you want to build a simple antenna ?

The Photo Umbrella Antenna is an easy 2 afternoon project ..

https://github.com/AP-HLine-3D/HLine3D/blob/main/21cm_Step1a_Antenna_H1Umbrella_ConstructionDetails_Feb25_03.pdf

Alex Pettit

Project HLine3D

[Conrad Cardano]

Hi

Thank you.

My soldering techniques are awful.  I never learned how to do it properly from a master.

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[Lester Veenstra]

I have  the lnas   all back orders filled   more in hand

 

Lester B Veenstra  K1YCM  MØYCM  W8YCM   6Y6Y W8YCM/6Y 6Y8LV (Reformed USNSG CTM1)

 

To get past GMAIL SPAM FILTER reconstruct a return address from

lester  "aptsign"  veenstras  "dot"  com

 

452 Stable Ln

Keyser WV 26726 USA

 

GPS: 39.336826 N  78.982287 W (Google)

GPS: 39.33682 N  78.9823741 W (GPSDO)

 

 

Telephones:

Home:            +1-304-289-6057

US cell          +1-304-790-9192

Jamaica cell:    +1-876-456-8898

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[b alex pettit jr]

Only 2  solder joints required   =   A Learning Opportunity ...    total cost ~ $100

[Conrad Cardano]

Thank you, Alex.

I’ll just buy the scope-in-a-box

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[b alex pettit jr]

How about a Discovery Dish Feed on a 1.5m Solar Cooker ?

That will  exceed the performance of your current choice & No Soldering !

[Conrad Cardano]

Has anyone done The Discovery Dish Feed on a solar cooker?  

I’ve seen the solar cooker with a “cantenna”.

As I am quite new to this,  the “scope in a box” has all of the correct parts.  I have seen the Youtube

Video of someone putting window screening on the side of the antenna to reduce the noise. 

On Tuesday, December 2, 2025, 'b alex pettit jr' via Society of Amateur Radio Astronomers <sara...@googlegroups.com> wrote:

How about a Discovery Dish Feed on a 1.5m Solar Cooker ?

That will  exceed the performance of your current choice & No Soldering !

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[b alex pettit jr]

The solar cooker dish will narrow the beam width , but both having the same f/D ratio will have similar S/N performance.

Another Idea : Purchase the Discovery Dish & Feed, try it, and consider this ( not too difficult )  upgrade  mod 

Discovery Dish Enhancement Test

Discovery Dish Enhancement Test

=========================================================================

The narrow side of the SB WiFi dish is ( without extending ) not optimal for radio astronomy.

The DiscoDish Feed locates the LNA at the Dipole & that is a  Plus for performance.

Lots of choices.............................

=====================================================================

[b alex pettit jr]

Adding screening over the slots in the WiFi grid helps block ground noise pickup also.

.

[Conrad Cardano]

Fifty-five years of optical astronomy has taught me that the learning process(for beginners) is more important than having the largest possible scope.

I'll start off with the scope-in-a-box, put some window screening on it, and use that simple configuration to learn as much as I can about the 21cm line.

In a few years, I will try to move up to a 2 meter diameter scope.

Thank you all for your help and advice!

Conrad

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