|
Post by Boomer on Mar 16, 2020 0:11:21 GMT
Conducive
Maybe ground conductivity in different areas has something to do with it, PA and NEO, and where I live it's rated 2-3, poor conductivity, and signals just don't travel as well.
I'm still surprised how well a low power station can get out in any case. At one time would laugh at putting up a serious Part-15 station, thinking it was just for teens with a phono oscillator or Radio Shack broadcast kit wanting to be DJs, then to be left behind in youth.
Later I read an article in an electronics magazine, like Elementary Electronics, and they did the whole deal with the pipe antenna and loading coil with the transmitter at the base. I don't think it was shown, but it was described as an install they did, and they got a half mile, which got me to get a map out and make a circle on it to see what my coverage would be and start dreaming.
That was the first system that actually tried to do more, and someone actually got into the engineering of it. Everything I'd seen before that was a loopstick with a tuning capacitor and a short piece of wire hanging off of it inside of a room, little attempt made at matching the wire.
Bomar (like the crystal company:)
|
|
|
Post by thelegacy on Mar 26, 2020 19:17:08 GMT
Great Range from the 100 mW Procaster!! I always wanted to know what the Procaster could do under good conditions. What I'd like to know is how did it perform to a portable Radio like a Tecsun PL-380, 365, 880, or something like a Sangean or Grundig standing outside the car.
Mine at 1 1/4 mile was less then what I'd call pleasant because there was hiss and I really had to modulate to be heard. The antenna I used was home made however.
Here is my antenna and ATU setup with the ASMAX2 C-Quam AM Stereo transmitter. Lets see why the Procaster done so much better than me.
ATU..L type. Primary 4 turns 18awg Secondary 100turns #26awg.
Antenna Itself
Helix coil antenna consists of pvc construction. 8 foot 1/2 inch diameter pvc with a total length of 30 foot , 33inches of 12 gauge copper wire wound, leaving one quarter inch spacing , wound tightly. Ground counter pois consists of 10 foot of 12 gauge copper wire wound on 1/2 inch pvc just below the top connection. Leave 6 inches between the "hot," connection and ground connections on pvc pipe. Top load , capasidence hat consists of a total of 8 12 inch radials. Antenna is supported by 3 inch pvc pipe with fiberglass standoffs for extra support.....
|
|
|
Post by Boomer on Apr 7, 2020 6:29:27 GMT
Pictures
Hey Legacy, your pictures didn't show up in the post. That antenna setup you have sounds like what I call a 'Tesla coil antenna' with the primary link with a few turns with a large inductance secondary.
Hope you get it working again!
Boomer
|
|