ARRL

AA6E

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
Forums demoted? Aug 18th 2013, 18:36 10 603 on 28/8/13
Why isn't there more action on ARRL forum? Sep 13th 2012, 00:48 11 2,982 on 29/1/13
Forum avatars? Aug 17th 2011, 16:45 5 1,409 on 21/8/11
Operating Furniture Aug 17th 2011, 01:52 10 3,055 on 27/12/12
Radiolocation News Jul 27th 2011, 01:52 3 1,611 on 28/7/11
General Comments Jul 24th 2011, 21:46 22 6,825 on 29/7/11

Latest Posts

Topic Author Posted On
virtual radar WB4URP 2 weeks, 5 days ago
I agree it's not there. You would need to contact the author or the sdrsharp project.

73 Martin AA6E
What is an accepted range for a DX contact? WN6WJN on 17/4/14
For the HF bands (below 30 MHz), usually called "short wave", we have long-distance propagation thanks to bouncing signals off the ionosphere. On these frequencies, the usual idea of "DX" is contacting someone in another country. So US-Canada is "DX" by this measure, even if the distance can be very short. And Maine to California would not be DX.

ARRL has the concept of a "DXCC entity" and people try to contact as many of them as possible. They are generally countries, but some non-countries, like Alaska and Hawaii, are considered separate entities. Check out http://www.arrl.org/country-lists-prefixes.

73 Martin AA6E
WiFi Remote Control KS5KIP on 15/4/14
The "Internet" is just a bunch of connected networks, and each one is like your own local wi-fi network. Any remote control system that works over the Internet is presumably using TCP/IP (or UDP) protocols that would work equally well on your local network. So that shouldn't be a problem. The easiest remote arrangement for the radio would be to get a radio that directly supports Ethernet remote operation - for control and audio in/out. But that's only part of the problem. You may need other functions for antenna switching, rotators, etc.
Distance two antennas should be apart WV0L on 13/4/14
The antennas will interact if they run parallel, but maybe not too badly. Spacing shouldn't matter very much. You may have to adjust the length of the 6M dipole to get it to resonate where you want. The interaction is much less if the wires are at right angles, and you would get an intermediate case with 45 degrees.

You could try just tying the 6M dipole across the existing G5RV feed point, making a fan dipole of sorts. The ladder-line matching section will probably be wrong for 6M, but it might still be worth a shot. It would save you the duplexer and additional coax.

This can all be modeled with EZ-NEC, if you want to get into that (fairly tricky) software.

73 Martin AA6E
How do I tell QST editors an article is really bad! WA6SAZ on 8/4/14
The usual way to submit to QST is to mail qst@arrl.org and/or check with www.arrl.org/qst.

The conversion from XP to Linux can be a good thing -- no new hardware, no cost. But a lot of folks will be put off if they can't port their favorite applications programs across.

73
Martin AA6E

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