Category Archives: B’s Blog

Security camera Foscam FI8904W

Due to recent vandalism at my cabin in Maine, I decided to add a video camera to watch the entrance area.  A friend gave me this Foscam FI8904W IP camera and an older Verizon Mifi 2200 hotspot.  I activated the hotspot for an additional $20 on my current account, sharing our 8gb data plan.  In order to route outside traffic to the camera, I am using a Cradlepoint CTR35.  The CTR35 connects via USB to the Mifi, powering the Mifi at the same time.

The system is going to run from my solar power system.  I already have a 150 A/h bank, but need to add additional solar panels.  My calculations show 105W of solar is needed for my location; I’ll add 200W to cover other use.  The total load for this entire system varies from 9.5W to 11.5W depending on whether the IR lights are on or off.  It should also go higher than this when sending an image.  The amplifier itself draws ~5W so if I can get by without it, I’ll leave it turned off.

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Image viewed through the free Foscam iOS app on my iPhone

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Cradlepoint CTR35.  I have the Ethernet port configured as a LAN port, which connects to the camera via a cable.  I didn’t care to use the Wifi function on the Foscam camera.  If I add additional cameras, I can put a switch here.  USB cable is going to the Mifi.  Power is to the 12V solar battery bank.

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I have this Wilson cellular amplifier that came with my truck when I bought it.  It uses ~ 5W of power, but I think I’ll need the boost at the cabin.  Cell service is generally poor out there.

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I have everything terminated in Anderson PowerPoles to make connection easy once I get to Maine and do the installation.  It also makes it easy to disconnect devices during troubleshooting.

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The Foscam camera requires 5VDC for power.  I picked this DC-DC converter up from Amazon.com for $8.  So far it does the trick; we’ll see how long it lasts!

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The Wilson cell booster.  This device uses an external antenna (I’m using a Yagi), and provides a local hotspot to the cell phone cradle.

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W0C/SR-059 Mt Democrat and W0C/FR-001 Mt Lincoln

Continuing on with my recent desire to add more points to my SOTA total, I decided to drive to the Kite Lake TH last night and camp for an early am start up Mt. Lincoln and Mt. Democrat.  Mark, Christian and I hit the trail head at 6am to beautiful weather.  It had rained some around 4am but was clear when we left camp.

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When we got close to the summit of Democrat, dark clouds were already building.  The weather forecast had been clear until 2pm.  So much for weather forecasts!  We pushed on to the summit and the clouds moved off to the West/North.


I worked a few guys right away from Democrat, then packed it up with hopes of making Lincoln before bad weather hit.  I had forgotten (thin air?) that I was going to try working K1Jd and KT5X in Santa Fe on CW.  I had scheduled a QSO on 2m with Bob K0NR, and he was within range of 2m at his cabin.

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We crossed over Mt. Cameron.  This one doesn’t qualify for SOTA, and really doesn’t qualify as a 14er for any bragging rights.  Not enough prominence.  Somebody had left these cardboard signs on all the summits.

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There were more chasers available from Mt Lincoln.  I quickly had enough in the log and moved on.  The weather was really starting to close in.   It was fun to work a few guys on 40m-CW.  Nowhere near the pileup I would have dealt with on 20m.

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On the way across from Cameron to Bross, it started hailing and thundering.  I decided to not try my luck on Bross (plus it’s a closed summit, but that wouldn’t normally stop me!).

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The final track log and elevation profile:
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All the photos from this trip can be viewed in my Smugmug Gallery

73 de Bryan N0BCB

Truck solar panel part 2

A continuation from my first POST about this subject

I got the panel mounted tonight. 3M VHB tape and some angle iron. Seems to hold well!

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The hardware is #10 stainless self-drilling screws with star washers from a local hardware store.  I did add some 5200 around the connector once plugged in to help hold it down.  I wasn’t confident that it would stay plugged in, or that the cord would seal well to the boot.

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Truck camper solar panel part 1

I’ve been wanting to permanently mount a solar panel on the roof of our truck camper since installing the Truckfridge TF49 compressor type refrigerator. Routing the wires in was the biggest obstacle. Through a few internet searches, I decided on a marine bulkhead. I used 3M 5200 to seal this little guy to the roof, then routed the wiring through the tent and cabinets and down to the battery.

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If it does ever leak, at least it will be in an area outside the tent.

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See Part II

6M Yagi Match

Taken with SmugShot on my iPhone

Last year for Field Day I built a 6 meter, 4-element Yagi-Uda antenna for the W5YA team.  I never tried to match the antenna for 50Ω, and it compared poorly to Doc’s Hex Beam antenna.  This weekend, in anticipation of FD 2014, I decided to finally try and match the antenna.  I tried several designs.  My initial try was a hairpin match, which brought the 100Ω impedance up to 200Ω.  Then, I tried a 75Ω, 1/2 wavelength coax transformer as a 4:1 Balun.  I played with this a lot, but could not get it to match well enough.

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Today I tried a parallel 75Ω match based on this page.  Based on my Yagi dimensions, this showed a resonant frequency around 48 MHz.  I shortened my driven element whips about 2″ and brought the antenna to a perfect (enough) match!



KD1JV MTR v2 Part 1

I’ve been slowly building up my Steve Weber Mountain Top Radio version 2 kit over the past week. For the SMT parts I chose to try reflow soldering in a toaster oven, and I’m glad I did it that way. I used solder paste in a syringe from Cash Olsen as recommended by Steve. For the oven I used an unmodified $20 Rival oven from Walmart set to 420F and simply watched for the paste to become glossy solder.

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Once the SMT parts were in place, it was easy to finish the standard through hole parts.

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Right now I’m in the process of winding the toroids and soldering them down. I’ll update this again once all parts are down and I begin with adjustments and testing.

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New Buddipole mini shockcord whip

Buddipole finally released a mini version of their adjustable shockcord whip, and today I got to test it with Wayne KD0VPR and his recently finished Bit20X transceiver. We made one contact from CO to NH but conditions were tough with a contest going on.

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We had the Buddipole set up as a vertical, with 4 of the 11″ arms and the 9 section whip fully extended. We only needed 1.5 turns on the coil to make up for the slightly short 1/4 wave. Two opposing elevated radial wires were about 17′ each and dropped from the versatee at 8′ to about 2′ above ground at the ends. We made two more contacts, both to NH, from the same setup but 100w and an FT-450.

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For anyone considering an adjustable whip, I would recommend this over the longer version, unless you go up to the 32″ one. The pricing needs to be updated for the 24″ version as it costs more right now than the 11″ version!

Feedburner active!

Ok, it took me a little while, but I finally have the feedburner plugin activated and working. Feel free to subscribe using the link in the sidebar.
Bryan N0BCB

Buddipole 2m 5/8 wave vertical

I’ve been doing some searches for a 2 meter, 5/8 wave vertical using Buddipole parts, and so far I haven’t come up with one. So, I decided to figure it out on my own! This is pretty easy to build if you have the Versatee and rotating arm kit. I only had 2 whips available, but with 3 and a jumper you could use 2 ground planes.
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This antenna is tuned around 146.52 as a center frequency. Adjusting the element lengths and/or the coil taps should allow use over the whole amateur band

Freqency

SWR

R

X

145.0

1.4:1

44

17

146.0

1.1:1

45

4

147.0

1.3:1

63

10

A closeup of the Versatee.  Connect the Red coax wire to the Blue Versatee connection.  Connect the Black coax wire to the Black versatee connection.  The Coil wander lead connects to the coil 1.5 turns in from the brass screw at the top of the Coil. This should equate to ~ 0.15 uH of inductance.

MFJ-259b at 146.52

Ground plane element length (19.25″):

Vertical element length (48.0″):

Mini coil tap (1.5 turns in from the top, brass screw)

Gram and Grampa Bibeau remember

I captured this audio clip while drinking coffee with my Grandma Nancy and Grandpa Paul Bibeau on September 20, 2012 and thought other family members might enjoy it.