Total posts : 45366
[quote:387a940ff0]Not being an electronic expert of any kind I thought that perhaps the black pvc may increase the Q of the coil over the white [/quote:387a940ff0]
EXACTLY! Finally 🙂 someone outside the regular herd gets it 🙂
Here’s the story behind the magnum:
I started in Part 15 Radio just maybe 2 years ago (Has it really been that long already, SCWIS?), and I was trying in vain to get my tx (which was a gizmo ordered from the UK) to transmit more than 2 blocks.
I spent a lot of time with SCWIS over the phone and via email trying to do this. Looking back now, it was my fault I didnt get it working.
Someone introduced me to a Physics Professor from Stanford, and he sends me an email with the very precise instructions that you see in the howto (which now seems like it needs the connection schem added to it).
I ended up with 1 mile of range off the gizmo. Well, it rained, and the antenna filled with water (I didn’t realize this at the time), which changed everything. I thought the TX died, so I called my new friend, and he agreed to design and build me a new Part15 tx. This one got a full 100mW at the final, and he came and installed everything for me. We ended up with something like 3 miles of solid range.
The magnum has definately proved itself – enough that there are now several variations of it. Some include the taps, some don’t.