add new post (vhf radio rtl stick)

content/posts/2023-06-04-old-school-radio-with-rtl-sdr/index.md

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+# vim: ft=markdown
+title = 'Listen to VHF/UHF radio with an RTL-SDR stick'
+summary = '''Listen to old-school radio on the command line with `rtl_sdr`.'''
+date = '2023-06-04T10:33:11+02:00'
+# lastmod = ''
+categories = [ 'amateur-radio', 'computerstuff' ]
+tags = [ 'linux', 'freebsd' ]
+
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+
+## Listen to Ö3 at 97.8 MHz
+```console
+$ rtl_fm -f 97800000 -M wbfm - | play -t raw -r 32k -es -b 16 -c 1 -V1 -
+```
+
+It is usually `-r 24k` if we don't use `-M wbfm`.
+