14-04-2019, 10:08 PM
(This post was last modified: 14-04-2019, 10:08 PM by pamphonica.)
Rubidium (Rb) standards in module form (ex Chinese cellphone base stations) are still available (eg Efratom). Prices are £100-£200 now (used to be £50-£100). I have had a few and all were fine, with lots of life left in the physics package. Unless you plan to run them 24/7 they should have decades of life left in them. As long as they are fired up every month or so for some hours they stay very happy. They don't like to be left for years unloved!
For completely obsessive-level accuracy and stability you slave a RB standard to a GPSDO. I have both but not linked. The main advantage of a RB standard is that it does not rely on antennae and clear sight of the sky.
Our radio club had a project based on those excellent Ublox modules. The ones from China are almost certainly clones but work fine. Various designs exist including one in Practical Wireless April 2018.
-Jeremy
For completely obsessive-level accuracy and stability you slave a RB standard to a GPSDO. I have both but not linked. The main advantage of a RB standard is that it does not rely on antennae and clear sight of the sky.
Our radio club had a project based on those excellent Ublox modules. The ones from China are almost certainly clones but work fine. Various designs exist including one in Practical Wireless April 2018.
-Jeremy
Jeremy. G8MLK. BVWS Chairman. British Vintage Wireless and TV Museum Friend.
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Pamphonic Website ______________ BTTT OB Truck Restoration
