Cooling SDR on LRO-H4(SETI Horn of Plenty) [hydrogen line radio telescope at LRO]. – astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

[Andrew Thornett]

https://www.astronomy.me.uk/cooling-sdr-on-lro-h2scrt

This might be of interest to some hydrogen line observers.

Andy

[Ayushman Tripathi]

Hi Andrew,
Nice fix.

I've been thinking about something similar, but for a different use: using a small Peltier (TEC1-12706) to cool the LNA below ambient to bring its noise temperature down.

Some references on Peltier-cooling an LNA:
https://arxiv.org/pdf/0709.1840
https://science.nrao.edu/facilities/cdl/low-noise-amplifiers

https://www.mouser.com/c/thermal-management/thermoelectric-peltier-modules/

Cold side on the LNA, hot side on a heatsink + fan like yours.
The catch is condensation, going below ambient pulls dew/frost onto the cold side, so it'd need a sealed enclosure with desiccant.

Thanks.

[Andrew Thornett]

I have even bought the stuff for Peltier cooling but thought Id try a pair of fans first. Peltiers seem to use a lot of power so I am assuming I would to include some sort of temperature control, is that right? What would I use for that?

Sent from Outlook for Android

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From: sara...@googlegroups.com <sara...@googlegroups.com> on behalf of Ayushman Tripathi <ayushmantr...@gmail.com>
Sent: Wednesday, 10 June 2026 01:18:25
To: Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Subject: [SARA] Re: Cooling SDR on LRO-H4(SETI Horn of Plenty) [hydrogen line radio telescope at LRO]. – astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)

 

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