|
|
|
16
|
eHam Forums / Elmers / Buzzing on 40 meters
|
on: October 07, 2009, 05:39:39 PM
|
|
Bill,
You are lucky no one called the cops on you:
"I built a sheilded loop, per the ARRL Antenna book I believe, and I plugged into a portable Am radio (Grundig) with an external antenna jack and went walking around the neighborhood."
"What is our neighbor doing in front of our house with a metal detector?"
Marc
|
|
|
|
|
17
|
eHam Forums / Elmers / Understanding Gray Line Communication
|
on: October 07, 2009, 05:35:15 PM
|
|
Fascinating.
Like K0OD, my experience has been a "peaking" during sunrise on 40M. Japan often blows in here very strongly for about 45 minutes around that time.
Steve: Those opening are fast! How exciting to have it work!
And, as an aside (read your short bio), I am with you:
"I'm petitioning to make Santa Catalina Island a new one. If this works out, I can be there quickly." LOL!
Marc
San Diego
|
|
|
|
|
18
|
eHam Forums / Elmers / Understanding Gray Line Communication
|
on: October 07, 2009, 03:05:53 PM
|
|
Thank you for the comments thus far, but I am asking if those NOT ON the gray line benefit (at all) from speaking with Hams ON the gray line. Also, does this work for all bands, or just the low (say 30-160M) bands?
Thank you,
Marc
KA3DNR
|
|
|
|
|
19
|
eHam Forums / Digital / PSK31 vs CW...
|
on: October 07, 2009, 12:01:07 PM
|
|
Hello Folks,
I have read somewhere that PSK31 is much more "efficient" than CW. Have any of you made some empirical comparisons to test this out? In my light-work comparison, the weakest signal I hear on PSK31, I could also work on CW. But, what do I know?
Your thoughts? Do you have any juicy PSK31 sites explaining its superiority?
Regards & Thanks,
Marc
KA3DNR
|
|
|
|
|
20
|
eHam Forums / Elmers / Understanding Gray Line Communication
|
on: October 07, 2009, 11:56:47 AM
|
|
Hello Folks,
I am testing my understanding of Gray Line communication.
I read that...
"The "grey line" is a band around the Earth that separates daylight from darkness. Propagation along the grey line is very efficient. One major reason for this is that the D layer, which absorbs HF signals, disappears rapidly on the sunset side of the grey line, and it has not yet built upon the sunrise side. Ham radio operators and shortwave listeners can optimize long distance communications to various areas of the world by monitoring this band as it moves around the globe."
Sure, I know that. But do other locations, NOT along the Gray Line also enjoy a portion of that propagation efficiency with locations aligned with the gray line?
And, is the phenomenon only work for "night time" bands, or also for "day time" bands?
I would guess that QSOs along the gray line enjoy the most benefit, but, to a lesser degree, stations not along the gray line, but yet talking to stations on the gray line also enjoy some of the prop efficiency.
Your thoughts?
Thank you all.
Marc
KA3DNR
|
|
|
|
|
23
|
eHam Forums / Elmers / Grounding My Shack
|
on: October 06, 2009, 12:44:39 PM
|
|
Warning! Heresy statement acommeth!
Don't ground your shack, it is often messy, darn near impossible to do in some cases, and not needed. Period. I have been hamming for 30 years with all kinds of power levels, and I have never seen the need.
Marc
|
|
|
|
|
25
|
eHam Forums / Elmers / Opinions on Verticals
|
on: October 05, 2009, 05:59:09 PM
|
Consider the S9 antenna. http://www.s9antennas.com/It's a piece of wire inside a telescopic fiberglass element. Extremely inexpensive. Works fine. I have done a heap of empirical work on verticals back in the day, mainly of the phased vertical variety. If you are going to ground mount the vertical, put down 100+ small, short wires (say 20-30'). I have found that raised verticals work just as good with only two radials, 180 degrees from each other. m |
|
|
|
|
27
|
eHam Forums / Misc / Load a tree...
|
on: October 01, 2009, 06:42:42 PM
|
|
"I think it's a "sappy" idea."
Leaf the puns out of it.
Your comments are treesonous!
|
|
|
|
|
Loading...
|
Show Posts
