Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

On Thu, 27 Feb 2020 08:45:16 -0800 "Richard (Rick) Karlquist" wrote: > OTOH, you could build a simple Colpitts > oscillator and see where it oscillates. > That's what they did back in the dark > ages. > > Any time nut should be up for that. Yes, but how many of us can build a time-nuts quality

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

That's not relevant. The idea is to see what frequency the crystal oscillates at not to build a high stability oscillator. If can be made to oscillate at a frequency somewhere around 5MHz/3 then its likely a third overtone crystal. Bruce > On 28 February 2020 at 23:34 Attila Kinali wrote: > >

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

Reference on high quality crystal oscillators: On Fri, Feb 28, 2020 at 11:35 AM Attila Kinali wrote: > > On Thu, 27 Feb 2020 08:45:16 -0800 > "Richard (Rick) Karlquist" wrote: > > > OTOH, you could build a simple Colpitts > > oscilla

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

Well said, been looking for this « tutorial» eagerly myself too. GC. > Le 28 févr. 2020 à 11:35, Attila Kinali a écrit : > > On Thu, 27 Feb 2020 08:45:16 -0800 > "Richard (Rick) Karlquist" wrote: > >> OTOH, you could build a simple Colpitts >> oscillator and see where it oscillates. >> That'

Re: [time-nuts] Any time-nut able to copy 82S191 PROM?

Skip, I have a Data I/O 29B on a shelf somewhere. I think those are the same PROMs used in the 11869A for speciality plug ins like the Hughes mmwave plug ins. If so I’ve burned a number of them and am happy to help out. Steve WB0DBS > On Feb 27, 2020, at 6:20 PM, Skip Withrow wrote: > >

[time-nuts] uBlox F9T

Hi For any out playing with the F9T, there is a new version of the manuals out. They also have an update to the “ROM boot loader" code. I have yet to work out if you can do a field upgrade on that part of it. My guess is “not so much”. Still no stock at any of the “usual” US distributors. The

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

On 2/28/20 2:34 AM, Attila Kinali wrote: On Thu, 27 Feb 2020 08:45:16 -0800 "Richard (Rick) Karlquist" wrote: OTOH, you could build a simple Colpitts oscillator and see where it oscillates. That's what they did back in the dark ages. Any time nut should be up for that. Yes, but how many of

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

Hi > On Feb 28, 2020, at 9:33 AM, jimlux wrote: > > On 2/28/20 2:34 AM, Attila Kinali wrote: >> On Thu, 27 Feb 2020 08:45:16 -0800 >> "Richard (Rick) Karlquist" wrote: >>> OTOH, you could build a simple Colpitts >>> oscillator and see where it oscillates. >>> That's what they did back in the da

Re: [time-nuts] uBlox F9T

Further to Bob's message, these PDFs can be downloaded from Ublox's website at: https://www.u-blox.com/en/product/zed-f9t-module#tab-documentation-resources and similarly for the F9P: https://www.u-blox.com/en/product/zed-f9p-module#tab-documentation-resources Regards, Peter On Fri, 28 Feb

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

Am 28.02.20 um 11:34 schrieb Attila Kinali: Yes, but how many of us can build a time-nuts quality oscillator? I'm still lacking that paper/book that teaches me how to build a high stability oscillator. Especially if you see THIS in a tutorial and 5 cm below the OOOH so precise phase noise sim

Re: [time-nuts] Are there SC-crystals out there in the wild that are not Overtone?

Many crystals possess spurious modes not terribly far from the desired Hi-Q mode. Since the spurious mode(s) are lower Q, oscillation on one of these can build up faster than oscillation in the desired mode, driving the sustaining amplifier into compression before the desired oscillating mode reall