Re: [time-nuts] New Member + Basic Questions

I see I am in Really Good Company Don Rob Sherwood. > Paul, > > Your last paragraph was a hoot. A ham friend of mine recently rented a > storage shed to keep all his spare test equipment and parts units. Another > ham friend used to have four storage units to store all his "stuff". The >

Re: [time-nuts] New Member + Basic Questions

Good thread everyone. Nathan you have received a lot of wisdom and humor today. Yes for sub $200 you can be in good shape. If lucent remember a Ref0 needs an arduino and a good GPS 1 PPS. Though frankly even neo6s play well. If a Ref1 it has a GPS in and no need for the arduino. The $175 gets you

Re: [time-nuts] Tait reference

What little I can tell is they are telco references so there may be something good inside OCXO or RB. It looks like it runs on -48VDC from the ebay pix. Its output could be any of the typical telco references that are not 5 or 10 MHz. These are pure guesses. The Price seems reasonable. Good luck

[time-nuts] Lady Heather Server On Raspberry Pi 2 Model B?

> I wonder if I've got anywhere near the skills to do it... Probably not right now... it's not so much as knowing C, it's knowing the ins and out of knowing how your operating system (Windows, Linux, etc) interfaces with your hardware (display, mouse, serial port, keyboard). Basically, if

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

Moin, On 01/10/2016 07:56 PM, Attila Kinali wrote: On Sun, 10 Jan 2016 14:30:41 +0100 Magnus Danielson wrote: SR-flipflop? Are you refering to the JK-FF phase detector or the PFD? A straight SR-flipflop. I would have written JK-FF or PFD if I meant it. Also, as

Re: [time-nuts] Tait reference

Hi Unless we are looking at different auctions, that one appears to want 13.8 V at <= 5A as the supply. The BNC’s are also a fairly rare item in the Telco inventory (but not unheard of). If I had to bet, I’d say it’s a piece of mobile video gear. I would not bet anything over about a nickel

Re: [time-nuts] Lady Heather Server On Raspberry Pi 2 Model B?

The server is a console app that uses plain Winsock calls derived from the BSD sockets API, so it could run on anything down to and including an Arduino without too much work. Porting the GUI client to anything else would be a fair bit of work, though. -- john, KE5FX Miles Design LLC >

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

God morgon, On Sat, 9 Jan 2016 23:01:31 +0100 Magnus Danielson wrote: > > A D-Flipflop is a rather weird mixer. I have not done the calculation, > > but i'm pretty sure that the output is not exactly what you'd expect > > it from a normal mixer (namely having half

Re: [time-nuts] Divider circuit for Rubidium Standard

Hi Rick, On Sat, 9 Jan 2016 14:45:43 -0800 "Richard (Rick) Karlquist" wrote: > This circuit is very similar to one that was championed by Tom > Faulker of HP/Agilent at the now closed Spokane site. Tom > measured the circuit at about -171 dBc/Hz. He was very

Re: [time-nuts] Divider circuit for Rubidium Standard

Moin Bruce, On Sat, 9 Jan 2016 21:36:35 + (UTC) Bruce Griffiths wrote: > Splitting the resistor in 2 and ac coupling the emitters together > reduces the effects of Vbe and/or base biasing mismatch allowing a more > symmetric output and/or operation at lower input

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

Moin phk! On Sat, 09 Jan 2016 22:56:27 + "Poul-Henning Kamp" wrote: > >Single gate chips better than multi gate chips. > >(no interference through the power supply of the different sub-parts) > > Would paralleing multiple gates in the same chip make things > better or

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

God eftermiddag, On 01/10/2016 11:21 AM, Attila Kinali wrote: God morgon, On Sat, 9 Jan 2016 23:01:31 +0100 Magnus Danielson wrote: A D-Flipflop is a rather weird mixer. I have not done the calculation, but i'm pretty sure that the output is not exactly what

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

On 01/10/2016 11:32 AM, Attila Kinali wrote: Moin phk! On Sat, 09 Jan 2016 22:56:27 + "Poul-Henning Kamp" wrote: Single gate chips better than multi gate chips. (no interference through the power supply of the different sub-parts) Would paralleing multiple gates

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

Hi > On Jan 10, 2016, at 5:32 AM, Attila Kinali wrote: > > Moin phk! > > On Sat, 09 Jan 2016 22:56:27 + > "Poul-Henning Kamp" wrote: > >>> Single gate chips better than multi gate chips. >>> (no interference through the power supply of the

Re: [time-nuts] New Member + Basic Questions

Spend reasonable money. Learn, ask questions, rinse and repeat. It's how a mountain of stuff followed me home. Wife is cool with it. Electrical fires are a learning experience. Try not to repeat those. On Sun, Jan 10, 2016 at 1:25 PM, Nathan Johnson wrote: > Hello All, > I'm a

Re: [time-nuts] New Member + Basic Questions

Nathan, Bob shared a link for the Lucent units and a great amount of detail has been shared on Time-nuts about them. They will do what you want. The Ref0 requires a external GPS receiver and another Time-Nuts Arduino. It works really well and the quality of the ref0 seems to be that of the 1pps

Re: [time-nuts] New Member + Basic Questions

Hi Nathan, I have had all three types of house standards over time. For decades I used Sulzer 2.5 and 5.0 MHz standards for my ham shack / lab. See link. http://leapsecond.com/museum/sul25-1/ Of course there are much more modern and small units today, but it was a exciting to track them

[time-nuts] New Member + Basic Questions

Hello All, I'm a ham radio operator, for just a few years, and electronics nut for many more. I have been reading the archives and trying to learn a bit. I am wanting to develop an accurate frequency standard for "lab" and radio use. I see that I have 3 basic options that are possible on my

Re: [time-nuts] Divider circuit for Rubidium Standard

No, it was just word of mouth within the company. Somewhere I have a piece of notebook paper on which Tom drew the circuit. We did have internal forums where papers where presented, but this was never even published internally. As with all forums, a lot of stuff happens outside the official

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

Phase frequency detectors (starting with the legendary MC4044) being made out of flip flops, had metastability and/or race conditions. Motorola showed a block diagram made of gates, as if it were combinatorial logic, but because of the feedback, it is actually a state machine, as described in

Re: [time-nuts] New Member + Basic Questions

Hi > On Jan 10, 2016, at 1:25 PM, Nathan Johnson wrote: > > Hello All, > I'm a ham radio operator, for just a few years, and electronics nut for many > more. I have been reading the archives and trying to learn a bit. I am wanting > to develop an accurate frequency standard

[time-nuts] Lady Heather Server On Raspberry Pi 2 Model B?

> Porting the GUI client to anything else would be a fair bit of work, though. Not all that much work. There are only a few routines that would need to be supplied for screen, mouse, and serial I/O. Heather was written to avoid as much OS specific functionality as possible. The code lists the

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

On Sun, 10 Jan 2016 14:30:41 +0100 Magnus Danielson wrote: > > SR-flipflop? Are you refering to the JK-FF phase detector or the PFD? > > A straight SR-flipflop. I would have written JK-FF or PFD if I meant it. > Also, as I mentioned the PFD directly after, you could

Re: [time-nuts] Divider circuit for Rubidium Standard

Anything like the pnp + diode circuit shown in HP application note 301-1? Bruce On Monday, 11 January 2016 8:00 AM, Richard (Rick) Karlquist wrote: No, it was just word of mouth within the company. Somewhere I have a piece of notebook paper on which Tom drew the

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

Am 10.01.2016 um 22:47 schrieb Alexander Pummer: and there was also a frequency/phase detector from Analog Devices, which took care about that dead zone AD9901. 73 KJ6UHN Alex 73, Gerhard, DK4XP ___ time-nuts mailing list -- time-nuts@febo.com To

[time-nuts] Tait reference

Are these the references with a rubidium oscillator ? They seem to have similar models with OCXOs etc. http://www.ebay.co.uk/itm/111862884745 ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] New Member + Basic Questions

Paul, Your last paragraph was a hoot. A ham friend of mine recently rented a storage shed to keep all his spare test equipment and parts units. Another ham friend used to have four storage units to store all his "stuff". The disease is not curable with either time or antibiotics. My XYL

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

and there was also a frequency/phase detector from Analog Devices, which took care about that dead zone 73 KJ6UHN Alex On 1/10/2016 10:53 AM, Richard (Rick) Karlquist wrote: Phase frequency detectors (starting with the legendary MC4044) being made out of flip flops, had metastability and/or

Re: [time-nuts] DMTD - analog multiplier vs. diode mixer ?

"generate stable high -frequency signals with d flip-flops as digital mixers ans all -IC low frequency phase -locked loop", by R.Treadway and L.J. Reed, page 78 Electronic design 1 January 1972 Resistot array denounces D flip-flop mixer page 184 EDN 12 April 1990 digital frequency subtract or

Re: [time-nuts] Lady Heather Server On Raspberry Pi 2 Model B?

On 1/10/2016 1:06 PM, Mark Sims wrote: Porting the GUI client to anything else would be a fair bit of work, though. Not all that much work. There are only a few routines that would need to be supplied for screen, mouse, and serial I/O. Hi Mark and all, How much *skill* is needed to do a