June 2013 - PSDR - mailman.hamwan.org

Re: [HamWAN PSDR] 5SHPn modems in stock @ r0c-noc
by ktolliver 27 Jun '13

27 Jun '13

How about links for best cost/performance antennas-- Dish, omni, and sector? Also I saw a powerpoint slide that mentioned a 16db dish antenna with 1.25 w transciever combo unit that was $94. Im an anxious newbie that wants to get experimenting. Ken K7ICY Sent from Samsung tabletBart Kus <me(a)bartk.us> wrote: http://www.roc-noc.com/mikrotik/routerboard/RBMetal5SHPn.html 54 left, if you'd like to start playing with the cell sites. Paine is on the air, and we're gonna need some alpha testers. --Bart _______________________________________________ PSDR mailing list PSDR(a)hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org

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We're probably gonna have to do some retrofits on the sectors
by Bart Kus 27 Jun '13

27 Jun '13

So you're actually the first site with all 3 sectors installed, and this has exposed a problem I hoped would be better mitigated with the open air environment your site provides. I knew there was antenna crosstalk, I measured it @ 60dB of isolation in my garage. I was hoping it was mostly reflection-based, and it was. But the crosstalk up on the tower is as bad as 72dB isolation, which is still more than I'd like to see. If we can chop another 40-50dB down from that, I'd be happy. The fact that there are other antennas in front of the sectors isn't helping either, as the signal scatters and bounces back to neighboring sectors. I'm gonna fab some retrofit isolation shields to put on the sectors. Aluminum alloy 1100-H14 seems to be good for microwave work. First test, we'll try to eliminate the backwards radiation from the dish making it into the north sector. It's hard to verify this kinda stuff on the ground cuz the isolation levels required are so high, and ground reflections are a plenty. It's really gotta be done without echoes, so the tower provides a good environment for that. Here's what sector 1 (north facing) is seeing. The part shaded "WiFi" is the dish pointing back @ Capitol Hill. That -55dBm signal should not be entering the north sector. It's also seeing a lot more signal bleeding from sector 2 (120 deg facing) which peaks around -40dBm. And finally you can see sector 3 (bearing 240 deg) leaking in at about -55dBm. The "WiFi" marked leakage is only 5MHz bandwidth, whereas the other 2 channels are 20MHz wide. Hopefully with the shield in place we'll bring that leak down. If not, we might also have to augment the dish itself, as it's probably scattering the signal around the main reflector edges. Fabricating a shield for that is a little more tricky, so I'd like to augment the sectors first. BTW, a pretty nice little spectrum analyzer built into the modems, huh? :) --Bart

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Anyone have (access to) a high quality pipe bender?
by Bart Kus 27 Jun '13

27 Jun '13

Hi, These pipe bends for the Baldi mounts are not turning out great. Need something to bend 2-3/8" (OD) tubing with 90 deg angles and leave it looking pretty. The harbor freight bender for this is not the right design. A design like these seems a lot more appropriate: http://www.probender.com/ where it pulls the tube through and around the bend. Horizontally oriented gear like that would also work. Any suggestions? --Bart

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5SHPn modems in stock @ r0c-noc
by Bart Kus 27 Jun '13

27 Jun '13

http://www.roc-noc.com/mikrotik/routerboard/RBMetal5SHPn.html 54 left, if you'd like to start playing with the cell sites. Paine is on the air, and we're gonna need some alpha testers. --Bart

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Need mechanical assistance with van repair
by Bart Kus 24 Jun '13

24 Jun '13

Hello, In order to deploy to the Baldi site, a very rough road needs to be traversed. My car is not suitable for this type of road. I bought a van which can drive this road, but it needs engine repair. If you're handy with your hands, or even tool-fetching, your help would be greatly appreciated. I have the garage equipped to perform this repair, but it will go 3x faster with a helper or 2. We're shooting for Baldi this weekend, so a repair this week would be optimal. Please email me if you're willing to help with repairs this week or at some later date. I'll send you the address. Repairs will happen after work, 6PM until whenever. There are lights on site, so only stamina is a limiting factor. Thanks for any help, --Bart

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Re: [HamWAN PSDR] Paine Field pre-deploy roll call
by Bart Kus 24 Jun '13

24 Jun '13

I'm (predictably) behind. Still packing. Likely won't arrive until 10:00AM. --Bart On 6/21/2013 10:28 AM, me(a)bartk.us wrote: > Whoops I meant 24hrs out. Saturday at 9:30am is the start. > > ----- Reply message ----- > From: "Bart Kus" <me(a)bartk.us> > To: <psdr(a)hamwan.org> > Subject: [HamWAN PSDR] Paine Field pre-deploy roll call > Date: Fri, Jun 21, 2013 9:33 am > > > Hello, > > We are 48 hours from the Paine Field deploy. If you've been asked to > assist with the deploy, can you confirm your availability here? > > Also, I passed the training course, so HamWAN will now have access to a > certified tower climber! Me! :) > > --Bart > > > _______________________________________________ > PSDR mailing list > PSDR(a)hamwan.org > http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org > > > _______________________________________________ > PSDR mailing list > PSDR(a)hamwan.org > http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org

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Re: [HamWAN PSDR] Paine Field pre-deploy roll call
by KL7WM＠aol.com 22 Jun '13

22 Jun '13

ARRL Field Day has a new rule this year. Set up is for 24 hours, but it does not have to be contiguous. It can be 8 hour here and 16 hours there as long as it starts after 00.00 hours UTC Thrusday. Daniel Stevens, KL7WM In a message dated 6/21/2013 10:28:59 A.M. Pacific Daylight Time, me(a)bartk.us writes: Whoops I meant 24hrs out. Saturday at 9:30am is the start. ----- Reply message ----- From: "Bart Kus" <me(a)bartk.us> To: <psdr(a)hamwan.org> Subject: [HamWAN PSDR] Paine Field pre-deploy roll call Date: Fri, Jun 21, 2013 9:33 am Hello, We are 48 hours from the Paine Field deploy. If you've been asked to assist with the deploy, can you confirm your availability here? Also, I passed the training course, so HamWAN will now have access to a certified tower climber! Me! :) --Bart _______________________________________________ PSDR mailing list PSDR(a)hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org _______________________________________________ PSDR mailing list PSDR(a)hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org

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Re: [HamWAN PSDR] Paine Field pre-deploy roll call
by me＠bartk.us 21 Jun '13

21 Jun '13

Whoops I meant 24hrs out. Saturday at 9:30am is the start. ----- Reply message ----- From: "Bart Kus" <me(a)bartk.us> To: <psdr(a)hamwan.org> Subject: [HamWAN PSDR] Paine Field pre-deploy roll call Date: Fri, Jun 21, 2013 9:33 am Hello, We are 48 hours from the Paine Field deploy. If you've been asked to assist with the deploy, can you confirm your availability here? Also, I passed the training course, so HamWAN will now have access to a certified tower climber! Me! :) --Bart _______________________________________________ PSDR mailing list PSDR(a)hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org

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Re: [HamWAN PSDR] Paine Field pre-deploy roll call
by KL7WM＠aol.com 21 Jun '13

21 Jun '13

That is great. If I want a Certified Tower Climber I will certify MYSELF. I have climbed and taught and hired and managed climber for 40 years. Daniel Stevens, KL7WM Self Certified Tower Climber In a message dated 6/21/2013 9:33:34 A.M. Pacific Daylight Time, me(a)bartk.us writes: Hello, We are 48 hours from the Paine Field deploy. If you've been asked to assist with the deploy, can you confirm your availability here? Also, I passed the training course, so HamWAN will now have access to a certified tower climber! Me! :) --Bart _______________________________________________ PSDR mailing list PSDR(a)hamwan.org http://mail.hamwan.org/mailman/listinfo/psdr_hamwan.org

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Paine Field pre-deploy roll call
by Bart Kus 21 Jun '13

21 Jun '13

Hello, We are 48 hours from the Paine Field deploy. If you've been asked to assist with the deploy, can you confirm your availability here? Also, I passed the training course, so HamWAN will now have access to a certified tower climber! Me! :) --Bart

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