[time-nuts] WWVB odd propagation 07/14/2013

paul swed paulswedb at gmail.com
Mon Jul 15 13:16:30 UTC 2013


Thanks Alan for the clue. I had not seen this behavior before. Now if it
would behave like this all the time I would not need AGC. I can only hope.
:-)
Or my AGC is so good its controlling the entire LF spectrum.
Regards
WB8TSL


On Mon, Jul 15, 2013 at 7:42 AM, Alan Melia <alan.melia at btinternet.com>wrote:

> Hi Paul a major geomag storm occured around midnight UTC on the 14/15th.
> This precipitated hot electrons into the D-region which causes extra
> attenuation at night and enhanced daytime long distance signals. The
> daytime effect is usually short lived but the night-time absorbtion may
> continue for a few nights, as the ionoshere exchanges charge with the Ring
> Current (Van Allen belts)
>
> Alan
> G3NYK
>
> ----- Original Message ----- From: "paul swed" <paulswedb at gmail.com>
> To: "paul swed" <paulswedb at gmail.com>; "Time-nuts" <time-nuts at febo.com>
> Sent: Monday, July 15, 2013 2:56 AM
> Subject: [time-nuts] WWVB odd propagation 07/14/2013
>
>
>  Well this is pretty strange.
>> Working on the WWVB d-psk-r and testing a new simple receiver with agc.
>> Classic transistor design simple, cheap, and common parts.
>>
>> Normal wwvb signal strength on near boston using a Dymec WWVB rcvr quite
>> accurate.
>> day            night
>> 60-80         300-500
>>
>> today
>> 150            150
>>
>> Fairly constant and we have gone through diurnal shift across the country
>> now.
>> Thats very strange
>> Also verified using a HP3586 and its readings have matched the Dymecs
>> throughout the day.
>> The agc is not getting much of a work out. But I have to say I have never
>> seen wwvbs signal this stable and I am talking many years.
>> Regards
>> Paul
>> WB8TSL
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