WD6CMU wrote: Field Day 2003 was the testing ground for the third generation tennis ball launcher, dubbed “Trident”. Two legs and the apex of a 400′ vee beam were hoisted with three shots, a fourth shot was used to pull a messenger line over the beam to pull it loose from tree snags — a…
Your First Crystal Radio (How to) or building a crystal radio out of household items. The most difficult part of building a crystal radio is building an efficient earphone that can convert the tiny electrical signals into tiny sounds that our ears can hear. Our first radio used a telephone handset for an earphone, and…
1. Diagram (URL : blockdiagram) 2. ???(URL: sakura.bpf) 3. ???(URL: sakura.pmo) 4. TX (URL: sakura.main.rx) 5. TX LPF (URL: sakura.tx) 6. RF Final TX (URL: sakura.PA) 7. sakura.etc 8. sakura.case Author: jg2lgm
One of my favorite ham radio activities is making contacts on satellites. It’s really fun to know that you’re controlling something that’s receiving and sending communications from space. But communicating with satellites means carrying a big Yagi antenna around. So, I decided to use my fashion sewing skills to make a collapsible fabric Yagi antenna…
One teen sent a “secret” scheme of the transmitter for listening at a distance of 1 km. This “secret” scheme went from hand to hand and came across to me. I proposed a scheme of this transmitter, to really succeed. But he proudly rejected “my crap” and ran to collect details … The main-battery 1.5…