Re: [time-nuts] Quartz resonator aging - Vacuum backfill and getters

2019-05-09 Thread Bernd Neubig
Hi, >Attila wrote: >I stumbled over one small question in my quest to understand quartz resonator aging (and production). One is, that most people who mention backfill of resonator packages talk about Helium backfill. Yet Helium has quite high diffusion rate through metall (not as bad as Hydrogen,

[time-nuts] ZED-F9T

2019-05-09 Thread Bob kb8tq
Hi Digikey now shows the uBlox F9T in stock (250 pieces worth). The F9P also is back in stock. Pricing is identical on both parts. No eval kits for the F9T showing yet. The F9P eval (C099-F9P) is still listed at $50 more than the single piece price for a F9P module (and you get a free USB cabl