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AA6E Station Log





Updated: 2013-02-16T08:48:53.210-05:00

 



Your post rang a bell for me, hams still worked th...

2013-02-16T00:56:50.783-05:00

Your post rang a bell for me, hams still worked the world 50 years ago without Kenwood 990's, DSP and clusters ...



I'm way ahead of you - I never registered with...

2013-02-09T06:19:59.135-05:00

I'm way ahead of you - I never registered with FB.

Privacy concerns only got worse over the years. I have Google+, it came automatically with Gmail. Don't do much with it.

My blog is enough!



I feel your pain Martin. Newly installed CF-Zepp w...

2013-01-02T12:22:59.935-05:00

I feel your pain Martin. Newly installed CF-Zepp went down in the day after Christmas blizzard here and I'm QRT until we hit at least 32F again.

I hope you find your problem quickly and repairs can be made simply.

73, Jeff KE9V



I'm thinking about getting a Chromebook for my...

2012-12-12T07:26:27.577-05:00

I'm thinking about getting a Chromebook for my XYL Olga. So I'd be interested in any updates on how you get on with it.

Julian, G4ILO



I think you made a really good choice. It is a sol...

2012-12-12T03:26:33.586-05:00

I think you made a really good choice. It is a solid platform and its almost impossible to ruin chrome-os. I have been using chrome browser on my pc since the first day it was released so using the new chrome-os is 100% natural. Good luck with yours



That could be a real pain. If the voltage was high...

2012-11-22T20:50:50.978-05:00

That could be a real pain. If the voltage was high enough to run the tube plates in the receiver or lower stages of the transmitter then the filaments would have to be series like the All American 5 AC/DC radios or one very big resistor to drop the voltage. AC has made things a lot easier for us.



http://villagetelco.org/2011/11/guest-post-adaptin...

2012-09-09T23:22:16.999-04:00

http://villagetelco.org/2011/11/guest-post-adapting-mps-for-emergency-work/

This post talks about adapting a Mesh-Potato which is a wifi routing box that can Mesh with other similar nodes in the area to increase the operating range of the box. It also talks about letting other people in the area use voip apps on their smartphones to call out over this potentially portable, fault-tolerant infrastructure.

There's several wifi routers you can buy from China right now that can have DD-WRT or OpenWRT installed and meshed together also. I bought a couple of TP-LINK TR703N routers at $25/each. These things can run off of a USB port, so you know it uses next to no power.

A company called Doodle Labs brought out a 440mhz wifi card.
http://kb9mwr.blogspot.com/2012/01/doodle-labs-dl435-30-reports.html
It can be set to use a 5mhz or 10mhz bandwidth signal in the 420-450mhz band. The cards are expensive as you would expect for such a niche product, $150-200 each.

The benefit of all of the wifi stuff is the ability to send data and tx/rx fast enough to give the illusion of full duplex on one band. That's something that is outright impossible with any other technology in Ham Radio and I'd love to be proven wrong.



If you ask typical users, they'll probably say...

2012-09-07T15:00:18.192-04:00

If you ask typical users, they'll probably say they're using their cell phone as a handy-talky. They don't think of it as a computer thing at all.

It's true that a ham radio HT is less dependent on infrastructure, but they do mostly depend on repeaters, which are not always going to be working in bad conditions.



The computer communications are fine if that is so...

2012-09-07T12:30:23.163-04:00

The computer communications are fine if that is something you enjoy but lets remember that ham radio has no infrastructure thus we can communicate in emergency situations when no one else can.



Tobias - A digital copy would be fine with me. AR...

2012-02-18T10:25:18.737-05:00

Tobias - A digital copy would be fine with me. ARRL has the rights, so we'd have to convince them. A digital QST is coming soon, and there are digital copies of the Handbook and Antenna Book included with the hardcopies. But standalone publishing (pdf, Kindle, et al) is coming more slowly.

Martin



Hey Martin, your new book sounds exciting! I hope ...

2012-02-18T07:51:30.537-05:00

Hey Martin, your new book sounds exciting! I hope you make it also available for digital purchase! (Through your website, Kindle store...etc)
73 Tobias, DH1TW



Byron, Thanks for the comment. Later, if we want ...

2011-12-27T21:20:31.450-05:00

Byron, Thanks for the comment.

Later, if we want to shrink the footprint and cost, I would look at the new "BeagleBone" board. Depending on settings, the Speex compression takes about 30% of the BB CPU, and future SDR work might take more. It's also nice to be able to run all the Linux tools on this board.

73, Martin AA6E



What a great project if it could be brought down t...

2011-12-27T20:38:16.696-05:00

What a great project if it could be brought down to something like the US$20-35 PogoPlug embedded Linux platform. These support USB interfaces that might be used for local radio interfaces while the actual video and audio output are the computer on the Remote end.

Keep up the interesting work. 73, Byron. NZ3O



I'm glad you shared that review to us. I'l...

2011-11-23T09:38:31.145-05:00

I'm glad you shared that review to us. I'll probably consider it sometime. Thanks.

Stretford PC Repair



Martin, thks for sharing! About your SPGP and simi...

2011-08-09T13:34:37.916-04:00

Martin, thks for sharing! About your SPGP and similar: I fear flashover between incoming and protected cables. So I bought a LARGE outdoor metal junction box, mounted on outside wall inches from perimeter ground, and bulkhead-mounted my coax protectors (ICE) on the sides. COMCAST 3-play coax comes down EMT thru box straight to ICE 312(1.5-1000 MHz): yes, I too looked at U-Verse upgrade option, imagined what you experienced, and hung ATT's line on the pole across the street! -Tom, KG6RRU



Well I plan to not worry to much about the time li...

2011-06-16T21:49:37.946-04:00

Well I plan to not worry to much about the time lines and just enjoy the solar ride for as long as it lasts.



I didn't work the 10m contest, but I'm a d...

2011-05-06T15:15:34.192-04:00

I didn't work the 10m contest, but I'm a definite believer in gray-line propagation. That's how I made my two Antarctica QSOs.



This post is amazing, it's one of the best so ...

2011-04-14T17:44:06.047-04:00

This post is amazing, it's one of the best so far. Can you also feature others like radio controlled clocks?



Ka7niq Here - I wish I could afford a SteppIR. I j...

2011-04-01T22:49:57.319-04:00

Ka7niq Here - I wish I could afford a SteppIR.
I just have a vertical antenna on my roof here in Tampa Florida using a metal carport for a counterpoise. I don't want a bunch of radials on my roof.



I just got a 10 meter monoband vertical up on my r...

2011-04-01T22:46:15.946-04:00

I just got a 10 meter monoband vertical up on my roof here in Tampa Florida - Ka7niq



Sorry about the name! The history is this. It'...

2011-02-18T13:24:44.502-05:00

Sorry about the name! The history is this. It's no secret that we completely underestimated the level of demand for the FUNcube Dongle, and in the rush when trying to take this from a kitchen table project to a manufactured unit, the prospect of thinking up a better name disappeared off the radar. By the time we had any time to catch our breath, the horse had rather bolted, so we just left it as the FUNcube Dongle.

You are right about preselectors, particularly at VHF. The FUNcube Dongle does have programmable filtering, but it's limited at VHF. Things improve significantly at UHF and above. We have some suggestions to alleviate this already docuented and we're working on others too.

Regarding the versioning, you are right, the first couple of versions of firmware did not have a method to expicitly indicate the firmware level, although a smart programmer would be able to code someting up to probe the version.

This was as a result of running out of time before Christmas when our first manufacturer pulled the rug from under our feet, rather dramatically telling us that they weren't up to the job the day after they were meant to deliver. I therefore spent Christmas making the first 100 myself, on the kitchen counter, but we did deliver our first batch as promised in December.

This is a constantly evolving project. Firmware updates are frequently being supplied. I deliberately didn't provide AGC because I was concerned people would think the unit was insensitive. This could quite easily be implemented in firmware, however it would be based on the tuner's IF passband which is several MHz.

I would dearly love to broaden the bandwidth, but key to this project's original concept was to provide a passband wide enough to receive a very few kHz wide BPSK telemetry downlink, and do it as cheaply as possible, and anything else was a bonus.

The key to making this reasonably priced was to use mass market TV set top box tuner chips and audio codecs for the ADCs.

Providing several MHz of bandwidth is expensive in ADC terms.

The first pre production units only had 48kHz. It is possible that we may be able to squeeze out 192kHz and/or 24 bits, but I fear the unit will be panting quite a lot if it is even possible.

The sensitivity of all units is measured to be within a dB of 12dB SINAD NBFM on 2m at 0.15uV. Of course if it's overloaded then the noise floor will rise and you'll see apparent insenstivity.

Certainly I'd recommend using a USB extension cable with the FUNcube Dongle: if you've ever used a TV USB stick, the TV cable will innevitably cause some stress on the USB plug. I am sure though that the form factor has unwhitingly been one the reasons for it's popularity.

Anyway, thanks for the feedback, I welcome it.

73, Howard G6LVB



I reviewed your uverse stats and the bitloading an...

2011-01-17T23:02:21.122-05:00

I reviewed your uverse stats and the bitloading and att has a bunch of bonding and grounding to do in the outside facilities. Tell the prem tech to send out an I/R tech



Interesting enough, I had problems busting through...

2010-12-13T13:54:16.123-05:00

Interesting enough, I had problems busting through the back of those antennas pointed south (this is where the AMP helped). Lower 48 stations were working plenty of Mexico, Central America, and South America. It was easy to see who was running SteppIR antenna's. I would call them and they were weak and could barely hear me. On their next transmission, they were strong and about 20 over S9 with a flip of that switch. 10 meters is not open very often like this here in Alaska so I had the AMP working to take advantage of the moment. If it were a regular occurrence, I would not hesitate to operate low power. :0) Great job on the contacts!



Those IP addresses are legacy space, they are not ...

2010-12-13T09:37:48.076-05:00

Those IP addresses are legacy space, they are not under a contract of any sort with ARIN, nor does ARIN have any control over them, per the testimony of ARIN management.

Those addresses are worth a mint. Your organization can sell a chunk and fund itself in perpetuity.

And then you can just buy more spectrum!



My question was tongue in cheek. However, the Com...

2010-12-11T18:27:26.414-05:00

My question was tongue in cheek. However, the ComputerWorld article suggests there is an emerging market in IP4 addresses. (black market, if you prefer.) In other words, that Class A network could be turned into cash, one way or another. But it doesn't make much sense if there's no institution behind it. The individuals involved shouldn't profit, in my view.

73
Martin