HAM SIGNAL

Thoughts,observations,experiments, and ramblings in Amateur Radio by N1DAY and KC4SIT.

LIGHTBULB QSO PARTY - CLICK HERE

Toroid transformers and 630M

David Day

05 Aug, 2017

MORE TO READ

It is here - The Light Bulb Antenna - 'Dual Bulb'

09/20/2018

After several days of pouring over all the material I could get my hands onto that was related to mobile antenna design, It hit me... wire 2 satco S2431's in parallel to reduce hot bulb impedance, add a capacitance hat to help pull RF energy up into the bulbs, and finally, add a shunt to ground coil to manage resistance at resonance. The result - the LBA-DB - Lightbulb Antenna - 'Dual Bulb'. LBA-DB schematic and parts list CLICK HERE FOR A PDF OF THE SCHEMATIC Initial observations: 1.
Lightbulb Antenna Presentation

09/16/2018

The link below will provide you with a copy and notes of my current presentation on the lightbulb antenna. Fee free to use and modify for your own presentation purposes. 73 N1DAY LIGHTBULB PRESENTATION
LBA-MK V Parts List and Schematic

09/15/2018

I have now finished redesign of the lightbulb antenna. This version was intended to simplify several aspects of earlier versions, provide a parts assembly list, and improve on the coils for tuning the 10-20M bands and the 40-80 M bands. I also wanted to improve the coil design by appropriately spacing the coil turns, and this was the first time I used two wires with one serving as a spacer. Both wires were wound onto the PVC pipe with the flexible stranded wire serving as the spacer. As