Another Rainy Weekend

I spent most of this weekend chilling out around the house. I took a bit of time out on Saturday to hit a few legs of the circle farm tour with Raeleigh and Eileen. One of these days I’ll manage to hit the rest of the places on the tour, but I’m slowly nailing them, a month at a time.

I’ve been meaning to take a weekend trip somewhere, but with the rain I haven’t been motivated enough to get in the car lately. I want to get rid of my travel VISA soon, since it has a yearly fee attached to it, but before I do that I need to blow off a pile of points on it, and I plan to rent a pretty nice cabin or hotel somewhere for a weekend to use them up. I have a few spots in mind, I just need a bit of sunshine and some light on the open road before I disappear.

I’ve been on a nasal spray for my nose for about 6 days now, and I’m happy to say that I’m actually starting to feel a lot better. To be honest, it feels weird to be able to breathe through my nose again, which I guess means it’s been plugged up for a very long time. It’s still not perfect yet — I still go through phases of being a bit stuffy. But for the most part they seem to be opening up quite nicely.

Next weekend we’re having a WordCamp Vancouver meeting, which means I have to head into the city. After that, all the WordCamp ducks shout hopefully be in a row, which means I can take a few weekends off. Assuming the weather picks up, I’ll hopefully do a road trip or some camping soon. Other than that, another week as usual coming up. We’re getting pretty close to releasing a beta of WPtouch 2.0 — if you’re interested in it when it comes out, check it out.

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The Joy of Investing

I was talking to someone the other day, and we were both sort of lamenting the long gone days of adolescence. I remember being 17 years old, working a part-time summer job at Bonanza. While summer was only two months off, a good chunk of that was spend up at Cultus Lake, working as a dishwasher 20 hours or so a week, and spending as much time with my friends as possible. As a kid, you really don’t have to worry about where your money is going to go since you really don’t have much to spend it on, other than the world’s crappiest car and the occasional trip to the waterslides.

Unfortunately, us adults have to take things a bit more seriously. If nothing else, we’re all told that we have to start saving money as soon as possible for retirement. Our generation is going to be one of the first one to test that theory in its entirety, so it’ll be interesting to see just how it ultimately plays out.

Prior to leaving Vancouver, I signed up with a financial planner to try and get all my finances in order. The person who made the recommendation is a friend, so I was happy to go along and test it out. I met with the person a few times in Vancouver, moved my RRSPs over (which I would have had to do anyways, since I quit my job in Vancouver and my funds were managed through a group plan at work). He made some recommendations, I went along with most of them, and for the most part things went pretty smooth.

Since leaving Vancouver though, I unfortunately haven’t had much luck getting together with that planner as much as I wanted. A few times I was in the city, and unfortunately he wasn’t around to meet up. Phone calls work, but when the decisions of those phone calls affect finances, I’d much prefer one on one conversations to talk things through.

Anyways, after thinking about it for a long time, I decided the other day to sever the relationship and do something else. I was happy with all the advice I received and I wish the other person no ill will, I just didn’t think having a planner based out in Vancouver was working for me anymore.

I’d say about 50% of the books I’ve read in the last year have been related to investing and finances, and I no longer feel that managed mutual funds are a good investment. The majority of the funds in Canada have management expense ratios (MERs) or over 2.5% (which is where some of the commissions to financial planners comes from). That basically means if a fund makes 7.5% in a year, 2.5% of that goes to the fund management, and you’re left with only 5%. In fact, over 80% of managed mutual funds under-perform the stock market ever year. If you look at managed funds over a longer period of time, say 5 years, I think it jumps to 96% or so. To that end, most people nowadays recommend investing in index funds (at least those people without a vested interest in investing in managed mutual funds), which are funds that represent the majority of the stocks in the market, and consequently have very low MER (0.3 – 0.5%), since there’s really no active management. An example of an index fund would be the S&P 500, which represents a lot of the large-cap stocks in the US.

In terms of index funds, there are a few available in Canada, but many have higher than average fees (which is strange, since index funds are supposed to have low fees by definition). The two are ING Direct’s streetwise funds (which are actually pretty good, but have a MER of 1%), and also the TD e-Series funds. Since I do the majority of my banking through PC Financial (which was one of the first discount banks in Canada), I’m a big fan of ING Direct (and in fact, we do a bit of our business banking through them). That said though, the point of index funds is to reduce management costs, so I’ll probably start using TD’s e-Series funds. I’ve been meaning to open an ING Direct for a while now, so I may open one up and simply use INGs TFSA for now.

I’m sure it’ll be a few weeks before I have everything in order again, but I already feel a bit better moving in the direction I’m going in. The nice thing about index funds is that you buy them and essentially just hold onto them forever (since they aren’t really managed), so they aren’t anything you ever have to really stress about. You should rebalance your portfolio every year or so, but that generally only takes a few minutes. For example, if you have four index funds at 25% Canadian, 25% US, 25% Bonds and 25% International Equity, after the year is over you may find that, due to growth/losses, you have 35/20/20/25. In that scenario, you’d sell off 10% of your Canadian equity and top up the US and Bond funds so they are all roughly the same. Other than returning you to a balanced portfolio, the rebalancing process also forces you to buy low and sell high, which is the right away to manage investments.

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12 Down

Given that summer is just around the corner (at least, I hope it is — it’s really hard to tell with this weather), I decided about 6 weeks ago to try and get in better shape. One of the things I wanted to do when I moved out to Chilliwack was to be a bit healthier. I’ve definitely done that in terms of what I eat, but not so much in terms of how much exercise I get in a typical week. Summer is usually better for me as I like hiking and playing tennis, so I’m sure it’ll increase.

When I got back from Hamilton at the start of March I decided to start hitting the gym hard and being very critical of what I eat or drink. I’ve had the occasional beer, but for the most part I haven’t really been drinking all that much (burning 400 calories at the gym and then drinking 1,500 calories worth of beer seems counterproductive, even by engineering math).

Anyways, down 12 pounds so far and I’m on the last hole on my belt. Like the tortoise, slow and steady wins the race.

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Looking Forward To Breathing Again

Ever since I’ve moved back to Chilliwack, I’ve been having a lot of sinus headaches and routine problems breathing through my nose. I’ve never really had allergies before (at least, nothing other than an allergy to penicillin ), so I haven’t really known what to do with it all.

While cleaning my office last weekend, I found a few medical reports from my injury in 2006, most notably my first CT scan. While the doctor pointed out the obvious facial fractures, he also made note of sinusitis in both sinuses, something that was never pointed out to me. Regardless, I’ve been taking a lot of allergy pills since moving back here, most of which haven’t really helped all that much. What does seem to help are over the counter nasal sprays, but those are supposed to be pretty bad for you long term.

I decided to go down today to the clinic and get checked out. After explaining everything to the doctor, she took at look up my nose and was surprised and just how swollen my sinuses were. So, needless to say she prescribed nasal corticosteroids for me in the hope it would help reduce the inflammation. Apparently it’ll take up to 3 weeks for full effect, and I can say after one day I don’t really notice much improvement (especially compared to the rapid action of the over the counter sprays), but I’m hoping at some point in the near future I won’t spend most of my days walking around with a plugged up nose. Given how I’ve had sleeping problems on and off over the years, I wonder if the two might possibly be related. I’ll soon find out.

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Moving Away From Cheap

As I get older and a bit wiser, I’m starting to see the wisdom in not always buying the cheapest items. That’s never been a problem when it comes to technology, as I’m attracted to shiny objects. But when it comes to items like food, it’s a bit more challenging to spend an extra dollar or two on a dozen eggs, or to buy hormone free ground beef.

Lately I’ve been making purchases that I wouldn’t have made in the past, mostly people I’ve been trying to go out of my way to help smaller businesses. One such transaction I made before Christmas was to go to a local tire shop and buy a set of tires from Kal Tire, mainly due to a recommendation by my dad. Despite being a bit more expensive, they did a great job and it was a pleasant experience.

Today I hit a coffee shop in the morning and noticed there was a little tear in the sidewall on one of my tires. Judging my the scrape on my rim, I must have rubbed up against a curb the wrong way at some point, but don’t really remember any instances that stood out. The gouge was actually deep enough that I thought it may have sacrificed some of the strength of the tire, so I thought I would take it down and get it looked at. Sure enough, the guys at Kal Tire thought it should be replaced (you can’t repair damage to the sidewall, since that’s where the majority of the tire strength comes from). Having had a near blowout on the highway before, it’s nothing I really want to relive, so I told them to go ahead and put a new one on.

It only took about 30 minutes, and it was all done. Given that the tires on my car are performance all-weather tires, I expected to be dinged around $240 for the replacement. I was obviously a bit surprised when the final bill came back and it was only $40 due to warranty.

When I got home I googled typical tire warranties, and none of them cover any damage from potholes or curbs. I then looked at the Kal Tire website to see if I could find any other information, and stumbled across this paragraph:

Road Hazard Protection: Any which fail and in our opinion is not repairable due to road hazard damage like cuts, bruises, and punctures, will be replaced with a comparable new tire within the first 30 days of purchase at no charge, excluding balancing. After the first 30 days, from the purchase date, any tire, which fails due to road hazard damage and is not repairable in our opinion, will be replaced with a comparable new tire. The replacement cost for the tire(s) will be on a pro-rated basis. This will be calculated as follows: percentage of tread depth used multiplied by the current selling price at the time of return plus balancing.

Which is exactly what had happened. They had prorated the tire they took off and gave me $200 of the $220 back on it, then simply charged me to rebalance the new tire. Had I saved the $75 or so on the original transaction by going to a cheap place like Costco, I would have been out $240 today instead of $40. Not only that, but I also discovered that Kal Tire will also rotate my tires free of charge (since I bought a full set from them), which will probably save me another $30 – $40 a year. So, I’m definitely glad I didn’t go with the cheapest option this time around.

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New Tube Amp Blog

I’ve made a few posts about the little tube amp project I’m probably going to tackle in the fall, but decided to put the entries on its own blog, as I want it to be a single glimpse into a big design and build process. If you want to follow along, subscribe to the feed over at tubeamp.posterous.com. It’ll probably only be an entry every week or so for the next few months as I debate things in my head, but I’m hoping to be in a position to build something in the fall or early winter.

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Just Another Day

Yes, the rumours are true: today is in fact my birthday. Unlike other years though, I’m purposefully taking this one a bit slower. There are no bar nights planned or anything of that nature, and the highlight of tonight will probably be me eating a nice dinner in front of the TV while catching up on Lost. And that’s the way I wanted it this year.

Birthday

Last night my dad took me to the Canucks game in Vancouver, and we had a lot of fun. I slept in a bit this morning, a little treat to myself, and am currently at a coffee shop about to do another day of work. Strangely enough, lots of things have already lined up today. My cleaners are coming today, which means I get to have a nice clean apartment tonight. A payment from a magazine in France for an article I wrote months ago finally came through today, which is one less thing I have to worry about it. I just got back from renewing my driver’s license (which is kind of sad, since the day I came back from university after graduating was the day I got the photo on my driver’s license, which I had to replace today). But other than that, today is just another normal day.

Thanks to everyone who wished me a happy birthday in some capacity or another.

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KT88 Power Tubes

I spent the last hour before bed last night searching out the type of tubes I want to use my home amplifier. Generally you need at least three variants – one for the power supply rectification, one set for the pre-amps, and one set for the power amplifier prior to the speakers. There are lots of different ones to choose from, each with its own unique set of pros and cons.

One of the most well known power tubes for home audio is the KT88. Not only does it produce a really great tone, but it has a cool shape which I think would look really nice on the chassis. The KT88 pictured above is a reissue of a popular Gold Lion variant. While I’m sure it doesn’t have the exact sound as its vintage counterpart, the reviews on it are quite excellent. Unfortunately it’s not very cheap, running approximately $100 USD for a matched pair, or around $200 for a matched quad. How many I will ultimately need will be decided by the type of amplifier I build and how much power I’d like it to be able to output, neither of which I know at this point.

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Home Audio Tube Amplifier

Back when I was about 20 years old, a friend of mine living in the same building at UBC as me ending up building a little do-it-yourself audio tube amplifier for home. It was one of the coolest looking devices I have ever seen, and made me really want to try putting something like that together. When most people think of vacuum tubes, then think of outdated technology from the 60s that was generally inferior and not long lasting. That was typically true of a lot of audio applications back in the day unfortunately.

That said, while the vacuum tube has mostly been replaced by the transistor, there are still many applications that make use of vacuum tubes, such as high end audio, especially in guitar amplifiers. From a purely mathematical point of view, vacuum tubes produce a great deal of distortion when compared to transistors. What the math fails to take into account though is the nature of that distortion – transistors tend to produce odd-order distortion (where the 1st, 3rd, 5th, etc harmonics are distorted) whereas vacuum tubes generally product even-order distortion (where the 2nd, 4th, 6th, etc. harmonics are distorted). So while the vacuum tubes produce a greater amount of distortion, due to the even-order nature of it the distortion tends to be more musical than the transistor, which accounts for the general warmness attributed to tubes amplifiers.

Since I was about 23 years old, I’ve always wanted to make a vacuum tube amplifier for home. Fortunately most of the designs are purposefully simple, since it’s mainly about obtaining pure sound. Many of the vacuum tube amps run in a class A configuration, which means they are extremely power inefficient, but produce very amazing sound.

The main reason I never built one years ago was due to the cost. To build the amplifier I want, even as a do-it-yourself project, would probably cost me close to $1,500 in parts. But I’m starting to think that it might be a really good project for the fall or the winter, especially if I start thinking about it over the next few months and slowly acquiring the pieces to put it together.

Obviously a home audio tube amplifier wouldn’t make use of anything like a dolby digital decoder (although, I think that would be a pretty rad addition). Typically they are built to only drive two speakers, and are only meant to have analog inputs, typically for a CD player. Unlike solid state amplifiers (which can output several hundred watts of power), most tube amplifiers are limited to less than 10 watts or so due the nature of the tubes. You can definitely make 40W tube amplifiers, but at that level the tubes are extremely pricey and physically bulky, so it’s not something I’m that interested in. And truthfully, most people never use all that headroom on their home audio systems, unless of course they have super inefficient speakers. Most speakers for home can typically product around 90dB/Watt of output power. That means that an amplifier that could output 8 watts of power could drive those speakers to 99db at a distance of 1 meter. I actually have speakers at home with horn tweeters, which is one of the most efficient configurations available. In that configuration, my speakers can actually produce 98dB/W at a distance of 1 meter, which means I could create a 1 watt tube amplifier and still drive my speakers at 98dB.

So, I’m basically shooting for around 10 watts per channel if and when I build one. For those of you who want to see what a home audio tube amplifier might look like, check out this photo:

It’s hard to tell the exact nature of that amplifier without looking at the schematics, but the large black transformer at the back centre is most likely the power transformer for the input AC power. The transformers on either side of that one are the audio output transformers, which are meant to match the impedance of the power stage (typically around 5000 ohms) with the impedance of the speakers (usually around 8 ohms). The small tube in the front centre is probably the rectifier for the power supply, and the two small tubes on either side are the left/right channel pre-ampification tubes. The four tubes in the back are the tubes for the actually power amplification of the left and right channel (two per side), probably set up in a push/pull configuration.

Obviously since I have a pretty diverse background in electronics, I’d probably want to add a microcomputer to it, mainly to drive a LCD display panel on the front. But the rest of the amplifier would be deliberately basic to go along with the retro look of the tubes. But I think it would be pretty awesome to be listening to music in my living room and seeing the warm orange glow of all the tubes in the corner.

Still toying with some ideas in my head, but I’ve started pricing out some of the tubes and output transformers, and would really like to put something together over the next 6 to 12 months. It’s been a very long time since I’ve designed anything electrical, and I’m not even sure what tools exist on the Mac to help with that effort. But I’m hoping I can get some simulators going again so I can test a few basic designs and try to find a design that I think is both affordable and ultimately going to produce some pretty great sound.

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