<p>We are looking into the possibility of building a low budget horn antenna for detecting 21 cm hydrogen line radiation (~1420 MHz) and and possibly measuring its spectrum.</p>

<p>What are the types of parameters and specifications we should look for in an amplifier and filter that would be connected to the input dipole at the end of the horn?</p>

CC BY-SA 4.0
2019-07-12T06:40:14.827Z
I made a small adjustment to your question, have a look and double-check this is what you'd like to ask, thanks! and *Welcome to Astronomy!*
uhoh
CC BY-SA 4.0
2019-07-28T20:12:12.033Z
What sort of receiver are you thinking about?
jstarek
<observational-astronomy><amateur-observing><radio-astronomy><instruments>
Requirements for an amplifier and filter for a horn antenna-based 21 cm radio telescope?
shrish tripathi
# Requirements for an amplifier and filter for a horn antenna-based 21 cm radio telescope?

(Asked by: username_0 on 2019-07-11)

We are looking into the possibility of building a low budget horn antenna for detecting 21 cm hydrogen line radiation (~1420 MHz) and and possibly measuring its spectrum.

What are the types of parameters and specifications we should look for in an amplifier and filter that would be connected to the input dipole at the end of the horn?

**Tags:** observational-astronomy, amateur-observing, radio-astronomy, instruments
> **Comments:**
> **username_1**: I made a small adjustment to your question, have a look and double-check this is what you'd like to ask, thanks! and *Welcome to Astronomy!*  
> **username_2**: What sort of receiver are you thinking about?  

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## 0 answers

