Re: [time-nuts] DIY VNA design [VNA-Nuts?]

On Mon, 22 Aug 2016 23:44:17 +0200, you wrote: >On Mon, 22 Aug 2016 14:20:59 -0400 >Bob Bownes wrote: > >> Just finished creating it at groups.io >> >> *https://groups.io/g/svna * >> and sign up. :) > >Is there any advantage of using groups.io compared

Re: [time-nuts] DIY VNA design

On 8/22/16 5:01 PM, Richard (Rick) Karlquist wrote: On 8/21/2016 3:59 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: That said, I don't know why the author is using directional couplers. A bridge is much wider bandwidth. It is more lossy though. In general, a resistive bridge will

[time-nuts] For Sale Reference Synthesizer for Microwave "Brick"

For anyone still playing with old school CALIFORNIA MICROWAVE type Microwave brick cavity oscillators. http://www.ebay.com/itm/162150569755?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 I am cleaning out closets to make room for the next big project. Also check out my other related

Re: [time-nuts] DIY VNA design

The intersection of HP equipment && Time-Nuts && VNWA mailing lists is >> At least two ;^) Jim n8qoh ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the

Re: [time-nuts] negative mention of products (was: DIY VNA design)

One way I made someone stop complaining about what I was writing was to post all their emails in public. They complained about that too and I posted their complaints. They went away I think the rule is that when someone sends you a letter you own it. This was been the rule for centuries. The

Re: [time-nuts] DIY VNA design

On 8/21/2016 3:59 PM, Dr. David Kirkby (Kirkby Microwave Ltd) wrote: That said, I don't know why the author is using directional couplers. A bridge is much wider bandwidth. It is more lossy though. In general, a resistive bridge will always require a transformer/180 degree

[time-nuts] GPS for Nixie Clock

Last month there was a discussion here about using a GPS to drive a hyper-accurate nixie tube clock with a lot of the discussion revolving around the effects of human perception and reaction times. Here is blog post that discusses some of the gotchas software and hardware can impose. There

Re: [time-nuts] negative mention of products (was: DIY VNA design)

A friend some 20 years ago was the risk manager of a large health care corporation. When confronted with an individual threatening a groundless or nuisance lawsuit, she would smile sweetly and say, "Go right ahead. I have more than a hundred lawyers on the payroll. How many do you have?" Largely

Re: [time-nuts] negative mention of products (was: DIY VNA design)

On 22 August 2016 at 23:15, Attila Kinali wrote: > On Mon, 22 Aug 2016 16:16:16 +0100 > "Dr. David Kirkby (Kirkby Microwave Ltd)" > wrote: > > > That resulted in the manufacturer of the RigExpert contacting Tom, as > they > > were unhappy about

[time-nuts] Optical link connects atomic clocks over 1400 km of fibre

Some interesting developments in european atomic clocks. http://physicsworld.com/cws/article/news/2016/aug/22/optical-link-connects-atomic-clocks-over-1400-nbsp-km-of-fibre http://www.nature.com/articles/ncomms12443 The time kept by atomic clocks in France and Germany has been compared for the

Re: [time-nuts] 5061A Beam Current went high

In message , Pete Lancashire writes: >Up until now, beam current for me has been about 8-10 when peaked. The >number recorded on the door is 19. You may simply be running out of Cs. >Any ideas of what I should look

Re: [time-nuts] negative mention of products (was: DIY VNA design)

In message <20160823001519.8c2718305f109c2197f71...@kinali.ch>, Attila Kinali w rites: >Yes, lots of companies do get very unhappy when they see negative >mentiones of their product. Quite a few of them also do not get that >a mailinglist/forum/... is not responsible for what their users

[time-nuts] negative mention of products (was: DIY VNA design)

Moin, I am going here a little bit off-topic. Please bear with me for a second, because I think it is likely that people on technical mailinglists/forums might run into this problem at some point in their life. On Mon, 22 Aug 2016 16:16:16 +0100 "Dr. David Kirkby (Kirkby Microwave Ltd)"

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

I also prefer old-style e-mail-only mailing lists. Fortunately, you can subscribe to a groups.io mailing list via e-mail. Just send “SUBSCRIBE" in the body to svna+subscr...@groups.io Thanks, David Slik VE7FIM On Mon, Aug 22, 2016 at 3:08 PM, Wes wrote: > I agree. > > On

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

I agree. On 8/22/2016 2:44 PM, Attila Kinali wrote: On Mon, 22 Aug 2016 14:20:59 -0400 Bob Bownes wrote: Just finished creating it at groups.io *https://groups.io/g/svna * and sign up. :) Is there any advantage of using groups.io compared to a

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

On Mon, 22 Aug 2016 14:20:59 -0400 Bob Bownes wrote: > Just finished creating it at groups.io > > *https://groups.io/g/svna * > and sign up. :) Is there any advantage of using groups.io compared to a traditional mailinglist? If not, I would prefer a

Re: [time-nuts] 5061A Beam Current went high

I know this sounds "insane", but could the unit have been on the wrong Cs peak for some time now? -Brian, WA1ZMS iPhone > On Aug 22, 2016, at 3:02 PM, Pete Lancashire wrote: > > I fired up my old 5061A about 3-4 times a year to keep the tube pumped > down. I usually

[time-nuts] 5061A Beam Current went high

I fired up my old 5061A about 3-4 times a year to keep the tube pumped down. I usually run it for 1 to 2 hours to keep it pumped down. This time was different, My GPSs have been off the air from getting a new roof and not being in any rush to get the antennas back up, etc. So ... I wanted to

Re: [time-nuts] How to get PPS from ublox mini-PCI GPS to APU2 SoC serial port for ntpd

I bought 2 of these just in case I trash one while updating the firmware. If it doesn't work in the APU, I could order a mini-PCI to PCI converter adapter and see if I can get the other one going in a desktop. -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

Just finished creating it at groups.io *https://groups.io/g/svna * and sign up. :) On Mon, Aug 22, 2016 at 12:38 PM, Tom Miller wrote: > Maybe do it on Mewe.com? > > - Original Message - From: "Oz-in-DFW" > To:

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

Maybe do it on Mewe.com? - Original Message - From: "Oz-in-DFW" To: Sent: Monday, August 22, 2016 11:53 AM Subject: Re: [time-nuts] DIY VNA design [VNA-Nuts?] So is it time for VNA-Nuts? I can probably host it. -- mailto:o...@ozindfw.net Oz

Re: [time-nuts] How to get PPS from ublox mini-PCI GPS to APU2 SoC serial port for ntpd

The mini-PCI Express Card specification includes quite a bit more than just a single PCI-Express lane, there is also provisions for I2C (smbus), USB, LEDs, SIM, etc... While without looking a the physical card or specification I can't be certain, but I highly doubt it implements a PCI-Express

Re: [time-nuts] DIY VNA design [VNA-Nuts?]

So is it time for VNA-Nuts? I can probably host it. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] DIY VNA design, directional coupler

Alexander wrote: there is a current mode feedback device [which does not follows the gain bandwidth product role ] and has 1000V/usec rise time 92dB THD at 30MHz 3nV/rtHz noise Yeah, but look at its 1/f input voltage noise corner -- it's at 2 or 3 MHz!!! So the baseband input noise density

Re: [time-nuts] DIY VNA design

On 22 August 2016 at 02:51, bownes wrote: > > Comment inline > > > > On Aug 21, 2016, at 18:59, Dr. David Kirkby (Kirkby Microwave Ltd) < > drkir...@kirkbymicrowave.co.uk> wrote: > > > > I am not convinced that this is time-nuts related, although I am sure > many > > time-nuts

Re: [time-nuts] time-nuts Digest, Vol 145, Issue 41/AUSTRON PHASE STEPPER MANUAL

I have a couple of AUSTON 2055 PHASE MICROSTEPPER UNITS and I have a soft copy of the manual, but I will have to locate the CD where I have it stored. Please contact me off list if desired. v/r Cary Cary Williamson General Dynamics IT 700 Independence Pkwy Suite 100 Chesapeake, VA

Re: [time-nuts] DIY VNA design

Hi If you really want to work out the delays through all of this GPS "stuff" ahead of the RF -> PPS conversion, a VNA is about the only good way to do it. Bob > On Aug 21, 2016, at 6:59 PM, Dr. David Kirkby (Kirkby Microwave Ltd) > wrote: > >> On 21 Aug 2016