[time-nuts] Nutty time-nuttery with WWVB

Alex Pummer alex at pcscons.com
Thu Nov 10 16:17:19 EST 2016


Well, there is such zoo, that nobody could find what coming from where, 
I tried with an R&S EMI receiver and antennas, but on the other hand one 
could use the high level of energy to supply the power for small 
circuits....

73
KJ6UHN
Alex

On 11/10/2016 10:15 AM, Clint Jay wrote:
> Don't forget power line networking equipment but just because one
> interference source is tolerated or in order by the authorities doesn't
> mean it's ok to create another.
>
> Those switchers and even the hardware they power (I'm thinking of satellite
> receivers which spew all sorts of hash over HF bands)  are terrible sources
> of unmonitored QRM.
>
> On 10 Nov 2016 17:46, "Alex Pummer" <alex at pcscons.com> wrote:
>
>> And how about that many, many "radiator" which are moving up and down with
>> their carriers and don't give a damn about FCC Part 15 and radiating
>> radiating day and night with substantial power, I meant that FFC approved
>> and not approved switching mode power supplies, of which every household
>> has a hand full of it?
>>
>> 73
>> KJ6UHN
>> Alex
>>
>> On 11/10/2016 9:22 AM, William H. Fite wrote:
>>
>>> I heartily second Charles' admonition regarding FCC PART 15 unlicensed
>>> transmissions. Part 15 explicitly states that an unlicensed operator may
>>> not cause interference with any licensed transmission. Because of the
>>> specific purpose of WWV/WWVB transmissions, any discernible leakage
>>> detectable by any other user is prima facie evidence of unlawful
>>> transmission and subject to a heavy fine. I assure you that any licensed
>>> Part 97 user who detects your emissions over the top of WWVB is quite
>>> likely to rat you out to Uncle Charlie. And should, may I say, because you
>>> will be interfering with a public service. "I am just syncing my clocks"
>>> is
>>> not going to impress the guys who appear in your driveway in a white van
>>> with RDF antennas on the roof.
>>>
>>> So....be very damned sure that you are not radiating a discernible signal
>>> outside of the immediate vicinity of your clocks.
>>>
>>> Bill
>>> KJ4SLP
>>>
>>>
>>>
>>> On Thursday, November 10, 2016, Charles Steinmetz <csteinmetz at yandex.com>
>>> wrote:
>>>
>>> Peter wrote:
>>>> Could I implement my own personal WWVB transmitter that would
>>>>
>>>>> be powerful enough to be picked up by the clocks in my house?
>>>>>        *   *   *
>>>>> Has anyone tried this?
>>>>>
>>>>> Some on the list have, and I'm sure they will provide the details.
>>>> Others have mentioned the potential problems with interference to other
>>>> WWVB users.  For starters, make sure you study and understand Part 15 of
>>>> the FCC rules before you put it on the air, or you could face a nasty
>>>> enforcement action.  (Even if you are Part 15-compliant, you may still
>>>> screw up other users' reception and get a visit from the FCC when they
>>>> complain.  I operate several very sensitive 60kHz receivers -- if you
>>>> live
>>>> in my neighborhood, I'm almost certain to be unhappy about anything you
>>>> deploy.)
>>>>
>>>> Note that the problem with most "atomic" clocks that I've seen is
>>>> actually
>>>> not insufficient signal (in the wee hours of the morning, when they try
>>>> to
>>>> synch).  It is either excessive QRM, or orienting the clock so its
>>>> antenna
>>>> has a null toward Fort Collins.  Make sure the antenna has a major lobe
>>>> toward Fort Collins (this may require relocating the entire clock or
>>>> bringing the antenna out so you can orient it independently), and that it
>>>> is well clear of the AC mains distribution wiring in your house and any
>>>> other sources of QRM (wall warts, CFL lamps, LED lamps, etc. (this may
>>>> also
>>>> require relocating the clock).
>>>>
>>>> The typical clock using a loopstick antenna has lobes to the front and
>>>> rear, and nulls to the sides.  Thus, mounting the clock on the western
>>>> exterior wall (for users on the east coast) is usually best.  Putting it
>>>> directly in front of a west-facing window may help.
>>>>
>>>> Best regards,
>>>>
>>>> Charles
>>>>
>>>>
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>>>>
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