Re: [time-nuts] A new take on the all-hardware GPSDO concept

2016-09-26 Thread David
Is there a schematic showing what you attempted? I went back through the discussion thread and it was not real clear to me which design you implemented. On Mon, 26 Sep 2016 21:18:25 -0700, you wrote: >... > >The results aren’t very good. > >With a short TC loop filter, the PLL does lock up, but

Re: [time-nuts] A new take on the all-hardware GPSDO concept

2016-09-26 Thread Nick Sayer via time-nuts
At the risk of inviting everyone to say “I told you so,” I’ll report here my experimental results from trying this concept out. Since there was a great deal of doubt about the outcome, I hedged my bet a bit and designed for the DOT050V rather than the OH300. If it worked out for the TCXO, then

Re: [time-nuts] A new take on the all-hardware GPSDO concept

2016-09-26 Thread Nick Sayer via time-nuts
> On Sep 16, 2016, at 1:13 PM, Lars Walenius wrote: > > > > My experience with the Venus838-T is only 2 weeks but disappointing. This can > also be guessed from the datasheet ADEV curve, that I guess is sawtooth > corrected values as it starts at 3E-9 at 1s, but is only 1E-11 at 1000s a > f

Re: [time-nuts] Inside of FT1200-100

2016-09-26 Thread Chuck Harris
Back when I was going to work on mine, I was thinking of prying the rubber away from the aluminum oven with something like a feeler gauge, but also using some naptha (lighter fluid) to help release any adhesive... I didn't get around to doing it, but that was the way I was going to progress. -Chu

[time-nuts] FS: Prologix GPIB

2016-09-26 Thread Joseph Gray
One like new Prologix GPIB-USB controller $100 plus shipping/insurance. One like new Prologix GPIB-ETHERNET controller $150 plus shipping/insurance. Joe Gray W5JG ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.co

[time-nuts] FS: Lucent GPSDO

2016-09-26 Thread Joseph Gray
The new-in-box Lucent/Agilent REF-0/REF-1 units that were selling on ebay last year. I have been running this GPSDO ever since I bought it. Includes a Meanwell 24 VDC power supply. I will also include a spare REF-0 unit. $200 OBO plus shipping/insurance. More info: http://www.prc68.com/I/KS-2436

Re: [time-nuts] Inside of FT1200-100

2016-09-26 Thread Ed Palmer
On 2016-09-26 10:00 AM, Christopher Hoover wrote: > >You might be able to slide something like a feeler guage down between the >oven and the rubber blanket to break the oscillator free. The oven on mine >is a plain metal cylinder. This way, the rubber sheet should protect the >Dewar from you

Re: [time-nuts] HP 5065A questions

2016-09-26 Thread Andy ZL3AG
Thanks for the link to those handy documents, Luciano. I have a serial 1420A that I plan on resurrecting once my lab is built. Since seeing the capacitor warning, I checked it just now and sure enough, 1 capacitor had vomited on the PCB, so I've removed it and cleaned the PCB ready for replaci