r/RTLSDR↗
Low-cost software defined radio (RTL2832 SDR) community
A subreddit for the low-cost software defined radio (SDR) community. While originally dedicated to the [RTL2832U USB rtl-sdr](http://sdr.osmocom.org/trac/wiki/rtl-sdr) project, relevant content related to general SDR, RF, and similar projects are also welcomed.
140k subscribers191 posts / mo in Sep 2026145 authors / mosince 2012
r/RTLSDR has 140k members (+15% over the last 12 months). It gets about 191 posts a month from 145 people. Top topics: Antenna Builds & Tips, Weather Satellites and HF Radio Antennas.
When to post on r/RTLSDR
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How r/RTLSDR has grown
Subscriber growth
Subscribers over time
Monthly activity
Posts, comments and authors per month
Topics and brands on r/RTLSDR
Top topics
Share of the subreddit's posts
- Antenna Builds & Tips1.3%
- Weather Satellites0.5%
- HF Radio Antennas0.4%
- Pirate Radio0.4%
- OTA Antennas & Setup0.3%
Brands people mention
Most-mentioned brands and sites, last 12 months
- RadioReference
- Aliexpress
- ARRL
- Crowd Supply
- eBay
Everything else about r/RTLSDR
Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.
Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research