| WA8LMF Home Page | Main Ham Radio Page | Updated 02 Jan 09 |
WARNING 1: This page links to a server hosted on a PC connected to a low-bandwidth (768K/sec) consumer DSL modem account. Due to limited bandwidth of this connection, images may occasionally fail to load if I have large bandwidth-sucking downloads in progress. If one or more of the maps fail to appear, hit "Refresh" or "Reload" on your browser toolbar.
WARNING 2: Disable automatic image resizing in Internet Explorer 6.x or Firefox. The maps sent by this server are likely to be much larger than your browser window. The automatic downsizing for large images provided in these browsers will make the thin lines and small details on the maps an illegible blur if not turned off. With resizing turned off, you will have to scroll down and/or to the right to see all of the maps.
WARNING 3: This webserver is on TCP/IP port 14439 rather than the customary port 80 for http . As a result, you may not be able to access it from some corporate or government Internet connections that severely firewall or otherwise restrict access to uncommon port numbers.
The webserver produces a multiple map display.
This display, served by the UI-Webserver component of UI-View, is created by three copies of UI-View32 running simultaneously on the same computer. All three instances are connected to APRS Internet servers using filter ports set to receive JUST my own callsign and nearby stations.
A Kantronics KAM dual-port TNC listening off-the-air to
30M HF 10.149.3 MHz (with a
Kenwood TS-50) AND two meters 144.39 (with a Kenwood TM-221) is connected to the AGW Packet Engine Ver 2004.1108 . AGWpe separates the HF and VHF
streams received from the TNC via a single serial port. Instance 1 of UI-View has the AGW port mask set to accept only the HF stream. Instances 2
and 3 of UIView have the AGW port mask
set to accept only the 2 Meter stream.
NOTE: This
is a lousy HF receive location with a horrendous noise level from a leaking
cable TV trunk (not my provider!). A dipole made from two 30-meter Hamstick
mobile whips mounted back-to-back about 20 feet (6 meters) above the ground is
used for HF receive. The dipole's broadsides face south-west and north-east
(toward the majority of the rest of the continental US).
All three instances of UIview are set to capture a map automatically every 2 minutes. Only the first instance is running the UI-View webserver. I have modified the original UI-View "special pages/index.html" code to insert all three map images into the webpages served by the first instance.
All of this is running under Windows 2000
Server running on a
Via 1GMHz micro-ITX motherboard with 512MB of RAM connected to a Linksys WRT54G router/4-port
switch/WiFi. The router is running a firmware replacement for the standard
Linksys code called "Tomato" available here:
http://www.polarcloud.com/tomato/
This freeware alternative has many feature enhancements compare to the OEM
Linksys firmware including:
Real-time graphcs of incoming and outgoing
bandwidth.
Outgoing QoS control with real-time graphic
display of connections vs priority.
Ability to turn the WiFi part of the router
into a WiFi client rather than access point or into a dedicated ad-hoc
point-to-point link.
Ability to do a "Site Survey" like most WiFi
clients on laptops to discover what other WiFi activlty is nearby. (Useful for
choosing a channel for the normal acess point mode with the least number of
other systems on it.)
Details on the "Ham Super Server" setup that runs this site are
here.
