G8YPH: Waiting for the postman

Wednesday 18 March 2015

Waiting for the postman

I ordered a load of antenna parts from Amazon the other day to aid erection of my new HF dipole. Everything has come apart from 10 off 3mm shackles and 5 off 6mm Stainless Steel Cable Clip Saddle Clamps. These are essential to clamp the guy lines in the air.

I looked on Amazon today, they have been despatched but have a delivery estimate: Monday, 23 March 2015 - Wednesday, 15 April 2015 despite them being ordered 12th March 2015.

Why does it take so long for delivery? Most other items arrived within a couple of days.

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Solar-Terrestrial Data

The Solar Flux Index (SFI) is a gauge of solar particles and magnetic fields reaching our atmosphere. Higher numbers mean more solar wind is reaching the earth thus better propagation.

The K-Index (or Boulder K) is a gauge of geomagnetic activity relative to an assumed quiet-day curve for Boulder,Colorado. Falling numbers mean improving conditions and better propagation particularly in northern latitudes and areas where aurora activity can occur. (The further you are from Boulder,Colorado, the less exact this information will be.)

The A-index is simply an index of geomagnetic activity derived from a scaled average of the previous 24 hours K-index readings. Use this as a reference for general conditions on the bands. Lower A index means better propagation.

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Wednesday 18 March 2015

Waiting for the postman

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