Modifying HP Server Power Supplies for Ham Radio Use

Posted on by Simone

This article documents the modification of 2 typesof Hewlett Packard switching power supplies to enable their use as power sources for ham radio equipment. Obsolete server power modules can be bought from  online dealers at very good prices due to the massive replacement of older network servers; typical prices for a unit are as low…

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A Sleep Strategy for DX Contesting

Posted on by Simone

A Sleep Strategy for DX Contesting This article originally appeared in the National Contest Journal. Why am I here? Listen to all these signals. Who are they? Wonder what they are doing? All this CW sure sounds nice. What should I do with this keyer paddle? Should I push this button? I can turn this…

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Sardine Can Antenna

Posted on by Simone

Sardine Can Antenna. is a BiQuad or Bi circle – wire length each side (8 x 1/4 waves ) 31 mm Sardine cans have quite standard dimensions around the world, although the oval one shown here is lightweight aluminium & does seem (perhaps by chance ?)to have enhanced directivity compared with more normal steel Canadian…

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Spiral Antenna

Posted on by Simone

Article by N9RET THE INDOOR SPIRAL DIPOLE Since well before getting my ham ticket in 1993, I had been interested in maximizing my antenna advantage within the limitations of my small living space. I would experiment with different arrangements for SWL, Scanner, AM/FM/TV and 11m antennas, mostly within the cramped confines of the attic of…

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