Reply to thread

Message

<blockquote data-quote="Terryl" data-source="post: 1045987" data-attributes="member: 369937">OK kids, I tried out two antennas types this week, too bad we cant record an RF signal as it takes time for these satellites to come over.The first one was a cats whisker antenna, this uses two 1/4 wave radials and two 1/4 wave ground reflectors, all bent to 120 degrees between them all, and orientated due North/South.The second was a modified Discone antenna, this consisted of the bottom ground plane reflectors (left intact) and the secondary active section setup for a half wave at 137.5 MHz (horizontal section), then two circularly polarized radials at a half wave set to 137.5 MHz.Of the two the cats whisker antenna out performed the modified Discone by at least 50%.I wish I had the RF cage and test gear from back in my antenna days, but sadly no more.This is the cats whisker.[ATTACH=full]115903[/ATTACH]And this is the modified Discone.[ATTACH=full]115904[/ATTACH]This before mounting on the support mast.</blockquote>

[QUOTE="Terryl, post: 1045987, member: 369937"] OK kids, I tried out two antennas types this week, too bad we cant record an RF signal as it takes time for these satellites to come over. The first one was a cats whisker antenna, this uses two 1/4 wave radials and two 1/4 wave ground reflectors, all bent to 120 degrees between them all, and orientated due North/South. The second was a modified Discone antenna, this consisted of the bottom ground plane reflectors (left intact) and the secondary active section setup for a half wave at 137.5 MHz (horizontal section), then two circularly polarized radials at a half wave set to 137.5 MHz. Of the two the cats whisker antenna out performed the modified Discone by at least 50%. I wish I had the RF cage and test gear from back in my antenna days, but sadly no more. This is the cats whisker. [ATTACH=full]115903[/ATTACH] And this is the modified Discone. [ATTACH=full]115904[/ATTACH] This before mounting on the support mast. [/QUOTE]

Verification