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| ts590s [2026/06/11 13:54] – [IF Panadaptor Tap] admin | ts590s [2026/06/11 15:24] (current) – [Oscillator Upgrade] admin |
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| * SiTime [[https://www.sitime.com/products/mhz-oscillators/digitally-controlled-oscillators/sit3521|Si3521]] - this is not sold as a TCXO, but is a TCXO per its functional description. SiTime only states a stability of 20PPM, but I'm still interested in playing with one. The evaluation board is prohibitively expensive, so I may spin my own board if I wish to proceed further. | * SiTime [[https://www.sitime.com/products/mhz-oscillators/digitally-controlled-oscillators/sit3521|Si3521]] - this is not sold as a TCXO, but is a TCXO per its functional description. SiTime only states a stability of 20PPM, but I'm still interested in playing with one. The evaluation board is prohibitively expensive, so I may spin my own board if I wish to proceed further. |
| * Jason Milldrum NT7S has done a lot of research, development, and testing into the application of a Silicon Labs [[https://cdn-shop.adafruit.com/datasheets/Si5351.pdf|Si5351A]] coupled with a 25MHz TCXO. This is a $2 part that could be coupled with a $2 TCXO. With appropriate filtering this could be a strong contender, and there is already a baseline of using this combination in amateur radio projects that demand high stability. Lots of posts on his blog under "Si5351A" - https://nt7s.com/?s=Si5351A | * Jason Milldrum NT7S has done a lot of research, development, and testing into the application of a Silicon Labs [[https://cdn-shop.adafruit.com/datasheets/Si5351.pdf|Si5351A]] coupled with a 25MHz TCXO. This is a $2 part that could be coupled with a $2 TCXO. With appropriate filtering this could be a strong contender, and there is already a baseline of using this combination in amateur radio projects that demand high stability. Lots of posts on his blog under "Si5351A" - https://nt7s.com/?s=Si5351A |
| | * The MS5351M exists as a Chinese clone of the Si5351A, and has been used favorably by QRP Labs, who also did a great write up on it. Interestingly, in his tests it demonstrated notably better phase noise characteristics than the Si5351A. Their write up can be found [[https://qrp-labs.com/synth/ms5351m.html|here]]. |
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| === Existing XO Analysis === | === Existing XO Analysis === |
