Buy some used rohn 25 or similar at a ham radio hamfest or swapfest. The tower comes in 10 foot sections and is self supporting to 60 feet. Put half a section in a yard of cement and go up from there. A hinge bracket at the bottom rocks all.
And if you have more money to spend get a Hazer system so you don't have to climb the tower to get your antennas to the top.
Except it's most likely fiber to a local wifi hotspot and your house is served via 802.11 modes. Using fiber vs a modulated ac signal is preferable since it requires less power and reduces the interference potential to licensed services.
OTOH, BPL is another way for a utility co to get more taxpayer money for this infrastructure. Monitoring their equipment is a red-herring, I think.
Will you be serviced? Are you sure? Texans are paying for it. If it fails for economic reasons the Texas taxpayers still pay for it.
The frequencies thay 802.11 stuff uses is secondary to the amateur allocation, IIRC. With enough power a licensed ham operator can get on, hold a QSO and the wifi users must vacate the frequency until the hams are done.
Fiber (almost) to the curb is nice, and the wifi is a nice way to finish it out.
I work in the paper industry and chlorine chemical leaks are rare. There are sensors everywhere in the pulping area to detect the presense of chlorine and hydrogen sulfide, and dioxins. That's why you wear an emergency escape respirator in that area.
Personally, I don't like to see a commodity operating system on a process network. Older, proprietary operating systems from Honeywell, Valmet, Rockwell, etc... are damn near bullet proof. When Windows NT was introduced the system availability went down from 99.9% to about 97% on certain components. I hated rebooting and repairing NT installs.
Having said that, things have improved. There is more and more win2k and winXP stuff avaliable for process networks, and a properly managed process network is physically separate from the mill-wide network. I'm seeing system availability back up to > 99.9% on most, if not all, windows-based components.
I must accept windows on the process control side of things. Tools have improved. Ease of use has improved, and the functionality of the software and hardware has improved. Interlocks configured via software and hardwired interlocks are always necessary and require periodic testing. That's what a preventative maintenance schedule is for. Equipment does fail from time to time, but some training and a good understanding of the process is very important. Don't get stuck on stupid.
By comparing the small bandwidth of PSK31 and measuring its gain against a CW filter of 500 Hz; 10 * log (500/31) dB = 12 dB, quickly reveals that a CW transmitter must put out 15 to 18 times more power than a PSK31 transmitter, just to achieve the same signal to noise ratio at the receiving station. This is the reason the PSK31 operating mode has gained so much popularity in such a very short period.
I work PSK31 occasionally and have worked Europe easily with 50W or less. It's not magic, and the band conditions are horrid as we're in a soloar minimum. If i get up early enough I bet i could work Asia. Not bad for being in southeast Arkansas.
I can't wait in a few years when the sunspot cycle is on the way up again and we're able to work across the world on 5W or less easily.
PSK31 is a fantastic mode to work and it's easy to pick up DX contacts.
Get your amateur license. It's extremely simple to do. I got mine last October. Amateur radio is fun as much as it is rewarding. Even if you aren't on the air every day you'll appreciate when you can communicate during a power outage or national emergency.
For a little studying and $12 you can get your technician's license which affords you a lot of bandwidth above 50MHz. Check ww.arrl.org for your nearest radio club and get in touch with someone.
Showing up to watch the movie. But then again, the Star Wars Wookie Christmas special was advertised just about as much.
I got sick of seeing Spiderman 2 when major league baseball clubs decided not to advertise the movie on the bases. I'm surprised my car can escape a gas station without having a Spiderman 2 bumper sticker affixed on a visible area of my car.
fsck the MPAA
Field Day in Greenville, MS
on
Field Day 2004
·
· Score: 1
... will be held at the American Red Cross Center. Fish fry for lunch.
From/usr/src/sys/pci/if_rl.c on my FreeBSD system:
* The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is
* probably the worst PCI ethernet controller ever made, with the possible
* exception of the FEAST chip made by SMC. The 8139 supports bus-master
* DMA, but it has a terrible interface that nullifies any performance
* gains that bus-master DMA usually offers.
*
* It's impossible given this rotten design to really achieve decent
* performance at 100Mbps, unless you happen to have a 400Mhz PII or
* some equally overmuscled CPU to drive it.
This is my favorite comment: * Here's a totally undocumented fact for you. When the * RealTek chip is in the process of copying a packet into * RAM for you, the length will be 0xfff0. If you spot a * packet header with this value, you need to stop. The * datasheet makes absolutely no mention of this and * RealTek should be shot for this.
More funny stuff: * The RealTek is brain damaged and wants longword-aligned * TX buffers, plus we can only have one fragment buffer * per packet. We have to copy pretty much all the time.
Interesting. I think Linux's documentation is actually better than Microsoft's.
Well, if you think linux documentation is better, read any of the BSD man pages. They are, if not, the best manual pages you will ever read. More often than not they have working examples.
What you could use is an OpenBSD computer in a bridging configuration. It takes about ten minutes to set up and you can look at all the traffic there or tee it off to another nic. The bridge requires two nics, and a third for the tee.
try this: h tee tee pee//w ww.smnolde.com: 7080/ipfw/ipfw-queue-bw-only (munged to protect my cable connection)
It's a script (that I wrote to do queuing and traffic shaping with DUMMYNEY. I used IPFW2 in the kernel. If you remove any references to esp, then you've got a good place to start.
The script will queue tcp and udp, in, out, or in both directions. Give it a whirl.
I use ipfw's DUMMYNET features for traffic shaping and queuing. I also use ipf and ipnat for the hardcore stateful packet inspection and kernel-level NAT. It works great.
But when pf is fully ported with AltQ and tables, I'll only need one packet filter, not two.
I think porting pf to FreeBSD is great. We'll have more options for packet filtering, queuing, bridging interfaces, etc.... besides, there's so much among the BSDs so this benefits everyone.
Check out the cdroot port. This port will make a bootable freebsd cdrom and you can install packages to it. When you boot, configuration files in/etc will load from a floppy.
I've used this port to make a FreeBSD-specific boot disk like tomsrtbt, but with more horsepower.
I think a few minor modifications to the cdroot port will do what you want.
Qualify for bragging and boasting rights on irc.freenode.net #superbowl
Re:I don't think that spam is the reason
on
Spammers Busted
·
· Score: 0
Driving is not a right. It is a priviledge. Read your driver's regulation booklet.
People who believe they have a right to drive deserve to have their money taken or thrown in jail for not following the laws of the country they live in.
Go see a papermill. You'll see so much that either goes into pulping virgin pulp or recycling or converting. There's so much going on and the process automation on the paper machine can be mind boggling.
Go find a newsprint mill and a paperboard mill to see the differences in technology, machinery, speed, and automation. The high speed paper machines are mind-boggling and the paper board machines make you wonder how they work.
I work in the paper industry as a chemical engineer. You can see much more with paper since it requires, on avergae, twice the number of processes to make a final product than a chemical plant. Plus much of the process flow is open in a paper mill and you can get pulp samples at intermediate sections of the mill.
Slashdot Mirror
And if you have more money to spend get a Hazer system so you don't have to climb the tower to get your antennas to the top.
Except it's most likely fiber to a local wifi hotspot and your house is served via 802.11 modes. Using fiber vs a modulated ac signal is preferable since it requires less power and reduces the interference potential to licensed services.
OTOH, BPL is another way for a utility co to get more taxpayer money for this infrastructure. Monitoring their equipment is a red-herring, I think.
Will you be serviced? Are you sure? Texans are paying for it. If it fails for economic reasons the Texas taxpayers still pay for it.
The frequencies thay 802.11 stuff uses is secondary to the amateur allocation, IIRC. With enough power a licensed ham operator can get on, hold a QSO and the wifi users must vacate the frequency until the hams are done.
Fiber (almost) to the curb is nice, and the wifi is a nice way to finish it out.
- KD5ZEF
I work in the paper industry and chlorine chemical leaks are rare. There are sensors everywhere in the pulping area to detect the presense of chlorine and hydrogen sulfide, and dioxins. That's why you wear an emergency escape respirator in that area.
Personally, I don't like to see a commodity operating system on a process network. Older, proprietary operating systems from Honeywell, Valmet, Rockwell, etc... are damn near bullet proof. When Windows NT was introduced the system availability went down from 99.9% to about 97% on certain components. I hated rebooting and repairing NT installs.
Having said that, things have improved. There is more and more win2k and winXP stuff avaliable for process networks, and a properly managed process network is physically separate from the mill-wide network. I'm seeing system availability back up to > 99.9% on most, if not all, windows-based components.
I must accept windows on the process control side of things. Tools have improved. Ease of use has improved, and the functionality of the software and hardware has improved. Interlocks configured via software and hardwired interlocks are always necessary and require periodic testing. That's what a preventative maintenance schedule is for. Equipment does fail from time to time, but some training and a good understanding of the process is very important. Don't get stuck on stupid.
packetradio.com
I work PSK31 occasionally and have worked Europe easily with 50W or less. It's not magic, and the band conditions are horrid as we're in a soloar minimum. If i get up early enough I bet i could work Asia. Not bad for being in southeast Arkansas.
I can't wait in a few years when the sunspot cycle is on the way up again and we're able to work across the world on 5W or less easily.
PSK31 is a fantastic mode to work and it's easy to pick up DX contacts.
KD5ZEF
Get your amateur license. It's extremely simple to do. I got mine last October. Amateur radio is fun as much as it is rewarding. Even if you aren't on the air every day you'll appreciate when you can communicate during a power outage or national emergency.
For a little studying and $12 you can get your technician's license which affords you a lot of bandwidth above 50MHz. Check ww.arrl.org for your nearest radio club and get in touch with someone.
KD5ZEF
Showing up to watch the movie. But then again, the Star Wars Wookie Christmas special was advertised just about as much.
I got sick of seeing Spiderman 2 when major league baseball clubs decided not to advertise the movie on the bases. I'm surprised my car can escape a gas station without having a Spiderman 2 bumper sticker affixed on a visible area of my car.
fsck the MPAA
... will be held at the American Red Cross Center. Fish fry for lunch.
73,
KD5ZEF
RealTek is RealCrap. You get what you pay for.
/usr/src/sys/pci/if_rl.c on my FreeBSD system:
From
* The RealTek 8139 PCI NIC redefines the meaning of 'low end.' This is
* probably the worst PCI ethernet controller ever made, with the possible
* exception of the FEAST chip made by SMC. The 8139 supports bus-master
* DMA, but it has a terrible interface that nullifies any performance
* gains that bus-master DMA usually offers.
*
* It's impossible given this rotten design to really achieve decent
* performance at 100Mbps, unless you happen to have a 400Mhz PII or
* some equally overmuscled CPU to drive it.
This is my favorite comment:
* Here's a totally undocumented fact for you. When the
* RealTek chip is in the process of copying a packet into
* RAM for you, the length will be 0xfff0. If you spot a
* packet header with this value, you need to stop. The
* datasheet makes absolutely no mention of this and
* RealTek should be shot for this.
More funny stuff:
* The RealTek is brain damaged and wants longword-aligned
* TX buffers, plus we can only have one fragment buffer
* per packet. We have to copy pretty much all the time.
Well, if you think linux documentation is better, read any of the BSD man pages. They are, if not, the best manual pages you will ever read. More often than not they have working examples.
Windows help is useless.
If I wanted a short boot time I'd run FreeBSD instead.
Too few? How about one too many!
One day when I get commit access I'm gonna remove if_rl.c and solve a lot of problems.
What you could use is an OpenBSD computer in a bridging configuration. It takes about ten minutes to set up and you can look at all the traffic there or tee it off to another nic. The bridge requires two nics, and a third for the tee.
I've done something similar and it works great.
Odyssey and Castle Wolfenstein were always my favorite. I learned to program BASIC on a ][+.
Slashdot is just keeping up the normal "almost released" announcement just before the formal announcement stuff.
try this: h tee tee pee //w ww.smnolde.com: 7080/ipfw/ipfw-queue-bw-only (munged to protect my cable connection)
It's a script (that I wrote to do queuing and traffic shaping with DUMMYNEY. I used IPFW2 in the kernel. If you remove any references to esp, then you've got a good place to start.
The script will queue tcp and udp, in, out, or in both directions. Give it a whirl.
- Scott
I use ipfw's DUMMYNET features for traffic shaping and queuing. I also use ipf and ipnat for the hardcore stateful packet inspection and kernel-level NAT. It works great.
But when pf is fully ported with AltQ and tables, I'll only need one packet filter, not two.
I think porting pf to FreeBSD is great. We'll have more options for packet filtering, queuing, bridging interfaces, etc.... besides, there's so much among the BSDs so this benefits everyone.
Check out the cdroot port. This port will make a bootable freebsd cdrom and you can install packages to it. When you boot, configuration files in /etc will load from a floppy.
I've used this port to make a FreeBSD-specific boot disk like tomsrtbt, but with more horsepower.
I think a few minor modifications to the cdroot port will do what you want.
Good luck.
How many times have you, on a Win2k server clicked the check box labeled "Remind me in four hours" and waited for the next shift to patch the box?
Oh joy, the pleasures of having an automated "Patch-me-now" daemon.
Lazy admin, none the less.
Qualify for bragging and boasting rights on irc.freenode.net #superbowl
Driving is not a right. It is a priviledge. Read your driver's regulation booklet.
People who believe they have a right to drive deserve to have their money taken or thrown in jail for not following the laws of the country they live in.
"My God! It's full of stars!"
Go see a papermill. You'll see so much that either goes into pulping virgin pulp or recycling or converting. There's so much going on and the process automation on the paper machine can be mind boggling.
Go find a newsprint mill and a paperboard mill to see the differences in technology, machinery, speed, and automation. The high speed paper machines are mind-boggling and the paper board machines make you wonder how they work.
I work in the paper industry as a chemical engineer. You can see much more with paper since it requires, on avergae, twice the number of processes to make a final product than a chemical plant. Plus much of the process flow is open in a paper mill and you can get pulp samples at intermediate sections of the mill.
You'd think that an educational institution like VMI would encourage proofreading. I noticed three or more errors in that page.
Trivia Fact: A+
Spelling: F
Polychlorolbiphenols, if my memory serves me correctly.
Fixing software by changing a domain name is a horrid solution. It's almost as bad as using software to fix porrly designed hardware.