An home made antenna switch with a Dummy Load selector. If you forget the radio is connected to the open or grounded side of the switch and you try to transmit, it is very easy to damage the finals of your transceiver.
Mounting on roof at the right ground level can greately impact on antenna performances because will affect the radiated angle of energy.
This is an uncommon loop antenna, hombrewed without the small feeding loop. With small spare parts is possible to build a loop antenna tuner for portable usage tha can ben used with common HF QRP transceivers
This will show you how to add a RF power amplifier to your Proxim Symphony for under $50. The cost is reduced by using the existing components on the Symphony, such as the PIN diode switch, and just inserting a higher power final amplifier. Increase the RF output power of your wireless network card to 1 Watt.
A portable Yagi antenna for 2 meters band.
Easy to use online Slim Jim antenna calculator. Input your frequency to automatically calculate the lengths of the different antenna parts.
Serving the Longmont Colorado area
In order to increase the gain for satellite opeations, working on 144 MHz bands, the author choose the Quagi design, having restriction of 3 meter lenght for the boom. In Italian