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Archive for October, 2012

Fake China capacitors

31/10/2012 Leave a comment

I came across this post in an online forum here. This is rather frightening because there are quite a few electronic shops here that stock capacitors like these and the last thing you want and need is getting short-changed with a couple of fake capacitors like these. Not only are their values lower than stated (because of the smaller capacitor hiding in the shell of the bigger one) but they are dangerous! As one person said in the afore-mentioned forum:

Take a look at these capacitors. The outer can says 6800uf/50V but they are actually 2200uF/35V on the inside. Insufficient capacitance at least; and a blow-up if used in a 40V power supply where you might have thought you had a sufficient safety margin!!

Scary stuff indeed. So if you DIY your own projects, be very careful about where you buy your capacitors from.

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Spalling concrete

30/10/2012 Leave a comment

This is normally what happens when you live in an older building, especially one as old as mine, which is about 40 years old. To clarify things, I do not own the building, I own an apartment in the building, which serves as my home and office. The concrete started to break on the ceiling in several parts of the house. Not good. So we called the building supervisor and he sent a contractor down to fix it. In actual fact, things like these cannot be avoided in old buildings. It is a minor irritation but nothing a little cement and paint will not fix.

Manchester United – 3, Chelsea – 2

29/10/2012 Leave a comment

I must admit, the score was wonderful and I did like the fact that we won at Stamford Ridge after 10 years. The own-goal scored by Chelsea’s Luiz (a very pinball-like goal) in the 4th minute was the doing of Robin Van Persie. The second goal scored by Robin van Persie gave us a 2 – 0 lead in the 12th minute, hardly 8 minutes later! But if we thought we were going to get away with a goal-less Chelsea in the first half, we were sadly mistaken. Juan Mata scored in the 44th and suddenly there was hope at Stamford Bridge! When the second-half started, Ramires scored a second goal and suddenly, the score was 2 – 2. But it did not end there. Javier “Chicharito” Hernandez scored a controversial goal, a goal that most people said was offside. Final result: 3 – 2 in Manchester United’s favour

Branislav Ivanovic was sent off, as was Fernando Torres for diving. What was interesting was that Chelsea were down to 9 men and Manchester United did not capitalise on that. Nobody like to see players sent off, granted and even Torres’s diving incident looked controversial because it looked like Jonny Evans brought him down. But the video playback showed him still running after being contacted by Evans and then suddenly fell, like an afterthought, near the Manchester United defence. So to me, I would consider that a dive.

A thrilling match. But though we won in the most acrimonious of circumstances, we did still win. Glory Glory Manchester United, we did it!

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Denon DN-HP500 DJ headphones

29/10/2012 1 comment

Bought these headphones the other day because I was getting sick and tired of headphones that cannot stand up to DJ use. I do DJ sometimes and so far, I have been through two pairs of headphones. I had a pair of Panasonic RP-DJS200’s that bit the dust after barely a few months and I also had a pair of el-cheapo Realistic headphones that lasted me for many years but ultimately, could not stand up to the rigours of DJ duty. So I was stuck with using a pair of Philips SHP 1900 headphones which are still going strong! The only con is that it is too big for the bag I use to lug my DJ equipment around so something smaller and foldable was needed. These headphones from Denon were very affordable and they should last for a few years hopefully. The specifications are:

  • Type: Air tightness: closed dynamic
  • ±90 degree swivel mechanism
  • Folding design
  • Sturdy metal headband
  • Real stainless steel plate etched with Denon DJ Logo
  • Driver unit: phi 40mm neodymium magnet
  • Impedance: 40 ohms
  • Frequency response: 10 (target)-28kHz
  • Output (sensitivity): 103dB
  • Max Input Power: 1,300mW
  • Cord length: 3.9′

I still love those Philips headphones. They were inexpensive and did the job. If they were foldable like these Denon headphones are, I would still be using them!

Chelsea vs Manchester United

28/10/2012 Leave a comment

It will be held today, the 28th of October 2012. An epic clash. Chelsea is top of the Premier League table and Manchester United are second. I will be watching this epic match at a bar with some friends. I am looking forward to this match!

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SoundTech portable PA system

27/10/2012 Leave a comment

There are a lot of companies making portable PA systems and this company is one of them. However, I have heard some pretty bad reviews about this one. For one, the piezo tweeter seems to blow pretty easily and secondly, the sound is not very good. It will be good for speech and general sound reinforcement but do not blast these babies. But the price is pretty good so that should be a good point in your favour should you decide to buy this system. This is what it features:

150 Watts @ 4 ohms
4-channel powered mixer
CD inputs for Karaoke, DJs & music
EFX loops in & out
1/4 in. & XLR inputs
1/4 in. speaker outputs
Accessible fuse compartments
Separate bass & treble control
Digital reverb effect
2 free speaker cables
4-color display box
2×10 in. speaker cabinets
2-band channel EQ
3-band master EQ

Frankly, I think the Phonic Powerpod system ( a system I reviewed some time ago and is in this blog) is much better than this one in terms of reliability and reputation but then again, all the products looks the same and were probably made in the same factory and re-badged. That is the name of the game now. Like I said, for general speech and sound-reinforcement, the price cannot be beat. You want anything more, get a more powerful system

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Female Speakon to 1/4″ phone plug adapters

26/10/2012 Leave a comment

Always have a couple of these in your toolkit. You know the drill…better safe than sorry. There are heaps of amplifiers out there with Neutrik Speakon outputs but some speakers still have 1/4″ phone inputs. What happens then, especially is all you have is speaker cables with Speakon plugs? Are you gonna do a field-replaceable speaker cable? Of course not. Adapters to the rescue. These will save your ass in more ways than one and they are not terribly expensive too!

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