[NLRS] High precision SMD TCXO at DigiKey

[Doug Reed]

<https://www.digikey.com/en/product-highlight/s/sitime/tcxo-vctcxo-and-dctcxo-oscillators?utm_medium=email&utm_source=npa&utm_campaign=42417_NPA1812B&utm_content=supplier9learnmore_US_1473-SiTime&utm_cid=10515488&mkt_tok=eyJpIjoiT1dGbVl6YzVNMk0zWmpjNSIsInQiOiJHcjd0U29TV1FFTDFVcEw4NkhVVmRwWmdMRnRYbmlvNXVINzZmcjhmamdXMW9wU3hpNHFLbVU1UjdOeVozaEFTVFk4aGwwRGtjTlBYcWVydjRlV1ptK0xpY1k2NWxhWkMwSmNtUEhvS1Q0ZXA5M2libUdETmFQc1kyM3pualJDbCJ9>

DigiKey just announced they are carrying a new series of SMD TCXO
parts. For a decent timebase, the SiT5155 series is rated 0.5ppm
stability over -40 to +85C temp range. They stock 10.0000MHz and
20.0000MHz versions for under $16.

For a less stringent application they have numerous parts with 5ppm
stability for under $13. I found it quite interesting that one of the
stock parts is a VCTCXO on 146.550MHz. Want to build a simple fox hunt
transmitter?

The best parts are the SiT5357 series. Digikey stocks the 100.000MHz
part rated at 0.1ppm over a -40 to +85C temp range. But all that
precision costs $60 each....

The SiT5155 part should give 5KHz or less frequency error at 10GHz.
You can still do better with a nice double-oven oscillator or GPSDO,
but with a lot higher power drain. The SiT5357 part would get the
error down to 1KHz at 10GHz for a $60 investment. A 10GHz transverter
LO string would be even easier if using a 106.5000MHz part. Or another
frequency you could multiply up for a beacon TX.

73, Doug Reed, N0NAS.

-- 
Tomorrow is always better because it means you lived through today.

"Those who would give up essential liberty to purchase a little
temporary safety deserve neither liberty nor safety."    Benjamin
Franklin