Re: [time-nuts] End of Loran-C in Europe confirmed.

On 17/12/15 10:50, Poul-Henning Kamp wrote: I've spent some time tracking this down, but it looks like all Loran-C in Europe shuts down on new-years eve. The only station I have not found official confirmation for is Sylt, but France, Norway, Denmark and UK have all officially announced

Re: [time-nuts] End of Loran-C in Europe confirmed.

Sad news.. -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Poul-Henning Kamp Sent: 17 December 2015 10:51 To: time-nuts@febo.com Subject: [time-nuts] End of Loran-C in Europe confirmed. I've spent some time tracking this down, but it looks like all

Re: [time-nuts] Trimble Thunderbolt Hard Reset

Hi The main things the hard reset does: 1) Erase the last survey location so the unit goes into self survey. 2) Erase any custom filter settings so the unit uses the factory settings. 3) The usual “restart the box” stuff. There is no downside to a hard reset and no custom fiddling to get the

Re: [time-nuts] End of Loran-C in Europe confirmed.

In message <5672a8ed.1010...@g7iii.net>, Iain Young writes: >The UK is (supposedly) supportive of eLORAN, Yeah, but you need 3 transmitters and if norway and france closes there is *at best* Anthorn and Sylt left. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

First prototype assembled today, tested with 12 VDC SMPS wall-wart supply and with 12 V lead-acid battery. Compared against a SRS FS710 and a Symmetricom 6502 and John Ackermann's 2007 plot: http://www.anderswallin.net/2015/12/frequency-distribution-amplifier-first-tests/ What does the 6502 do

Re: [time-nuts] End of Loran-C in Europe confirmed.

Hi Iain, ...and a damned shame too - there goes another standard. Just when the Americans seem to be doing a u-turn

Re: [time-nuts] End of Loran-C in Europe confirmed.

I have a memo / stakeholder briefing document from the General Lighthouse Authorities UK/Ireland (can't see any confidentiality notes on it), that states: "" 4. Effect if France Terminates eLoran It is hoped that the RNTF [http://rntfnd.org] commercial initiative can maintain the continuity of

Re: [time-nuts] End of Loran-C in Europe confirmed.

>From what I understand there have been some strongly worded letters from the russian goverment to the norwegian with regards to the shutdown of Bø chain (Jan Mayen, Bø in Vesterålen and Berlevåg) all in Norway. The russians dont seems to happy with the loss of LORAN, specialy when aurora borealis

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

That noise could come also from the environment, even trough ground-loop with the cox cable [ if the cable is connected between two grounds and the cable is long enough it will pick up noise since the noise-current generates voltage drop along the cable's shield, but the same field does not

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

In message , Anders Wallin writes: >My 'ultra-low-noise DC-supply' in the form of a lead-acid battery improves >things somewhat, but some spurs still remain:

Re: [time-nuts] End of Loran-C in Europe confirmed.

On 17/12/15 15:21, Wojciech Owczarek wrote: I have a memo / stakeholder briefing document from the General Lighthouse Authorities UK/Ireland (can't see any confidentiality notes on it), that states: "" 4. Effect if France Terminates eLoran It is hoped that the RNTF [http://rntfnd.org]

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

Those spurs are reminiscent of what happens when you lift the ground of a coax cable at one end and turn it into an antenna, in my experience. It is almost always a bad idea to do this. Try shorting out the capacitor(s) at your input and output jacks. -- john, KE5FX Miles Design LLC > My

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

Anders, the TL071 is not the right choice as it has a unity gain bandwidth of only 3MHz! You should use an OP with a unity gain bandwidth of ten times the wanted frequency at least (I guess 10MHz, so a 100MHz OP). Modern OPs are AD8045 (preferable), AD8099 (too fast and too good for this

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

On Thu, December 17, 2015 3:47 pm, John Miles wrote: > Those spurs are reminiscent of what happens when you lift the ground of a > coax cable at one end and turn it into an antenna, in my experience. This came up several weeks ago, I don't remember whether an original TADD-1 or some other

Re: [time-nuts] SMD TADD-1 distribution amplifier - seeking comments and suggestions?

Also add 1) BNX002 (attenuates noise in 1MHz to 1GHZ region) between the dc input and the input to: 2) Simple LCR filter - attenuates from 10kHz to 10MHz (see attachment) Output of which is connected to the regulator input. 3) Like all the so called RF regulators with internal low pass filters

[time-nuts] End of Loran-C in Europe confirmed.

I've spent some time tracking this down, but it looks like all Loran-C in Europe shuts down on new-years eve. The only station I have not found official confirmation for is Sylt, but France, Norway, Denmark and UK have all officially announced shut-down of their stations. It seems that they have