Replacing the Low Quality 28.8 MHz Oscillator on the RTL-SDR

The 28.8 MHz crystal oscillator on the RTL-SDR is known for being low quality. A low quality crystal means that the frequency tuning can be off by a few KHz and can cause the tuned frequency to drift over time.In this article of the GBPPR ‘Zine (kindly mirrored by superkuh), the authors show a tutorial on how a cheap high quality 14.4 MHz temperature compensated crystal oscillator can be combined with a frequency doubler circuit to create a high quality 28.8 MHz clock source, which can then be used to replace the low quality oscillator on the RTL-SDR. A 14.4 MHz oscillator is used as high quality 28.8 MHz oscillators appear to be rare.Frequency Doubler Circuit


Post a comment

You may use the following HTML:
<a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>