My UHF/VHF Setup on the Island

I was on a simplex net tonight on Bainbridge Island. I was explaining what equipment I have and promised to email the net members with more details.

Once I wrote it, I thought it might be nice to post here.

My 25W base station radio is the Leixen VV-898E. I don’t like it because it doesn’t work with Chirp. The lower power VV-898 works with Chirp. It frustrates me to no end that one works where the other doesn’t. It scrambles the radio programming info on the 25W. I mainly bought these so that I could recommend low-cost solutions to new hams if they worked out. Now that I know about the Chirp problem, I’d probably recommend the BTECH 25×4 mobile for a high-power solution.

My antenna is this one. I bought it to get me over the hill behind my house so that I could check into the 9 O’clock Net. It did not disappoint. I also have a Arrow Antennas OSJ 146/440 that I just bought. I haven’t tried that out yet, but have high hopes. I’m planning to use it on my bus with my 25-foot mast that I use for Field Day dipoles.

My mast is something like this. I did not pay as much as Amazon is asking. I found it in a Boise Army Navy store for a much lower price.

Ok. So We Bought a Bus…

The Beachcomber

A day before my 50th birthday, I saw an ad for a “party bus” on Craigslist. I sent a message to my wife that read, “Wanna get me a bus for my birthday?” Surprisingly, she agreed. We looked at it on the weekend after my birthday. We liked it. On my way back from Provo on the following Saturday, we picked it up.

The bus is a former school bus. I can tell from the yellow paint on the inside of the doors and the label that says “Vehicle Type: School Bus” on the driver side door. It has a 7.1L Deisel Engine, just like the Ford E350 that from which the bus was built. It can tow carry 9000 lbs and tow 7500lbs. It originally came with 5 bus seats and 4 captain’s chairs.

Why?

I’ve liked the idea of doing some sort of conversion for a while. My biggest reason for wanting to do a project like this is to customize the buildout for my ham radio installation. I want to be able to put an antenna on it for when I’m rolling down the road and for when it is parked for a short period of time. However, when I camp, I want to raise up an antenna mast and work HF. I want to load it up with batteries that have enough charge to last a week and solar panels so that I won’t need to worry about how much power I’ve consumed.

In the beginning, the camping build-out will be a small effort. I’ll add a bed and a toilet to get started, then add other conveniences later. Most power will be DC off of the ham radio batteries or LCD lights running off of AA or AAA batteries. I will have some room for appliances that I’ll plugin when I have hookups at a campground. Otherwise, it’s DC and camp cooking.

A Mast

I had the mast up on the camper today. The camper came with a TV that runs off of a power inverter which pulls from the bus’ batteries. I hooked the TV antenna jack to an HDTV antenna that my mom sent me for my birthday a few years ago. I put that antenna on my masting solution for my old truck. My auto-scan for channels picked up 16 digital channels.

That solution was basically a trailer hitch mounted bicycle rack to which an affix a piece of fiberglass masting. On top of that piece, I place the rest of the masting, as one fits inside of the next. The masting, itself was used to hold up camo nets over fighter jets so that they would not be seen by aircraft flying above. I removed the net spreaders from the kit, and Just use the interlocking poles as my antenna mast.

I intend to use this mast for supporting a dipole HF antenna and possibly a VHF/UHF antenna at the same time that it is supporting a TV antenna.

The Name

When I was a kid, I spent a number of summers at my grandmother’s marina. I remember a free weekly newspaper called “The Beachcomber.” A number of years later, when I got my ham license, KC7NJB, my friend asked me what “NJB” would stand for. I replied, “New Jersey Beachcomber.” So, when it came time to name a bus / mobile ham shack that is going to be staying at campgrounds all around the Puget Sound, many of which are on the beach, “The Beachcomber” seemed like an appropriate name.

Next Steps

The next steps are to remove the carpeting and replace the flooring. Once that is done. I’d like to re-mount the captain’s chairs so that they are more firmly attached to the floor and can swivel around towards the back. After that, I want to install a twin bed and a closet that will hold the toilet.

I’ll update with more later.

My Mining Experiment

A while back, I was talking with a friend of mine who pointed out a podcast episode called, “The Ceremony.” It was about the launch of a new cryptocurrency. It reminded me of 2013 when I’d experimented with Bitcoin mining. I had some mining gear laying around, albeit old technology, and thought it might be fun to play around with some alt-coins.

I poked around online looking for a coin that I could mine without being outgunned by some of the monster ASIC mining rigs that were mining Bitcoin and other popular coins. I was amazed to see how the cryptocurrency world had changed. When I tried this a few years ago, the mining was all done with the original algorithms that started with Bitcoin. Since then, Bitcoin had suffered some criticism for not being as anonymous as it was originally thought and had its mining dominated by miners with a large enough investment to buy expensive hardware (the aforementioned ASIC mining rigs). As a result, new coins with different mining algorithms designed to make mining “fairer” and make spending more anonymous had been created. The number of coins had exploded as different groups were competing for their coins to be the next Bitcoin.

I found Z-cash (ZEC) which was based on an algorithm called Equihash. Equihash requires a lot of memory making it easier to do with a computer than with an ASIC. It had also originated as a Linux only miner, which gave an advantage to people with Linux skills. My Linux machine was a hyperthreaded dual quad-core Xeon machine with 48 GB of RAM, which I thought would be moderately better than what most miners were using. Lastly, ZEC was trading for over $200 per coin, making it a worthwhile return.

I found a set of instructions for setting up a CPU miner and set up a Z-cash mining node. It ran for a long time but didn’t find anything. I wasn’t part of a pool and mining on my own, even with good hardware, didn’t compete with the other miners out there. I decided that I would find a better mining software, and maybe a GPU (basically, using the computing power of a graphics card to mine).

While I was looking for better mining software, I found a set of installation and setup instructions that showed how to configure the miner for Nicehash. I thought to myself, “what is Nicehash?” Sure enough, Nicehash can be found at www.nicehash.com.

After a little reading and a couple of Youtube videos, I learned that Nicehash is a service that sells mining computing power. If you want to run a 5 megahashes per second miner. You pay a fee to Nicehash, declare where you want to mine, and they do your mining for you. Where do they get that computing power? They are also a site where people with mining software and hardware can sell their computing power. In simple terms, they buy computing power from me and sell it to someone else. The best part is this: whether I find a coin or not, no matter what coin the buyer is looking for, I get paid Bitcoin for my efforts.

This quickly became something that I had to try. I had given up on bitcoin a while back because I was frustrated with not finding anything. Now, I could create a stream of coin. The challenge now was to maximize that stream.

I downloaded the Nicehash miner, which is a windows program that can use your graphics card or CPU or both to mine coin. I started running on my two Xeons. Doing this brought in about $.67 cents a day. It was fun. I finally had some small amount of Bitcoin. But I wasn’t going to have any real income in this manner. In fact, with the minimum required amount to receive withdrawals being 0.001 Bitcoin, I could only get payouts once a week. I wanted at least a nightly payout.

For the next phase of the project, I bought a pair of GTX1080TI Graphics cards. They were listed as the best GPUs that I could get for NiceHash. Essentially GPUs are computing cores on a graphics card that the computer can ask to do mathematical tasks like hashing algorithms (which is most of the mining work). I built a computer to house the GPUs. This is a lot like a typical computer, but needs to spread the cards out wider for air flow, and isn’t as powerful, in terms of processor or RAM, because the GPUs do most of the work. Once the hardware was assembled, I started mining with the GPUs.

The GPU solution netted me around 0.0012 Bitcoin per day. This was enough to get me a daily payout of $5.00 per day. This doesn’t sound like much; however, I could earn $150 per month at this rate, which could buy something meaningful. I was happy with this, but still wanted to experiment with an ASIC miner.

I had played with some older ASIC miners that are cheap buys on eBay. This was fun, and allowed my to stock up on alt-coins. It wasn’t much good for Nicehash, because the pricing structure rewards speed. The speed of the pools on Nicehash is driven by other people with ASIC miners. So, to maximize payouts, I needed something big.

I settled on an L3+ miner, which is the miner that Nicehash shows as its most effective miner on their profitability calculator. These are simpler to set up: buy a miner, buy a power supply, plug them in, point it at Nicehash, and start mining. Once I got this going, it churned out ~ $20/day. The following chart illustrates the difference in mining equipment.

Screenshot 2017-10-23 at 08.51.28 - Edited

The first red line segment with the modest slope is the aggregated total of the CPU miner. It is a steady churn of coin with payments spread out over weeks. You can see this in the blue line where the two points on this line are just above 0.001 bitcoin (on the right scale). At the third point on each line, you see the effect of switching to the GPU miner. There’s a big spike on the blue line (as there was some residual from the CPU added to the first GPU payment), followed by a daily total over 0.001 bitcoin. This slope continues until late October when the slope turns upward and the payout line goes up to ~ 0.0035 per day. This is the payout from the ASIC miner. Lastly, the nearly flat line segment in the center was due to me switching the GPU over to another mining site, to experiment with Z-cash mining. The line isn’t flat, because the CPU miners were still running on Nicehash.

I’ll report more, as I learn more.