Rick – Page 37

September 24, 2009September 24, 2009

HD OTA Channel Lineup for DC

Over-the-air (OTA) high definition television is great. It provides free high definition programming that is higher bitrate (meaning higher quality) than high definition TV from cable, fios, or satellite.

But it can be tricky to get antenna placement correct.

Channel Spreadsheet

I use a spreadsheet that I create from antennaweb.org data for installing HD OTA TV for DC Metro area clients.

This allows you to write down signal strength numbers on all your channels using different configurations:

different antennas
different locations
amplification on/off

Generally a higher placement for the antenna is best. For the Washington D.C. channel lineup, I have found the Winegard SS-3000 Amplified Indoor UHF/VHF Antenna to work best in most situations, at least when located close to the city. Amplification can help for areas with weaker signals but should not be done if you already have a strong signal.

There is typically a trade-off in choosing the best configuration. A particular setup might favor one channel and hurt another because channels use various tower locations and frequencies.

September 22, 2009

Monoprice for Cables

At Tech DC, we regularly set up home theater systems for people. We rely on Monoprice for all our cables. They are great quality and only a fraction the cost of cables from big box and other retail stores.

Local retail stores try to sell a HDMI video cable for $50 with every TV. See the HDMI cable selection at Monoprice showing equivalent cables for $10-20.

From a Virginia Target store:

HDMI cable from Target

From a Best Buy advertisement in the Washington Post:

HDMI Cable from Best Buy

September 22, 2009

Replace UPS Batteries

If you have computers or electronics that you don’t want to be killed by power fluctuations, it’s a good idea to have a UPS (Uninterruptible Power Supply). The battery in the UPS keeps your equipment running through blackouts our brownouts (reduced power).

Dead Battery

The main problem with a UPS is that its battery might only last a couple of years. A dead battery is often announced by a UPS through regular beeping. Because a UPS is expensive, consider just replacing the battery instead of the whole UPS when the battery dies.

You can buy a replacement from the UPS company or for significantly less money from a third party such as Battery Mart. Just be sure to get a battery that is designed for your specific UPS. I have had good luck with with Battery Mart, but there are some third party batteries which are of poor quality, possibly having a short life, acid leakage, or even causing a fire.

I replaced the battery for the APC Back-UPS 500 ES for $26.39 from Battery Mart instead of $48.99 from APC (prices include shipping).

Battery Mart Replacement Battery

September 19, 2009September 19, 2009

RIP original Palm OS

The original Palm OS is dead. The company did not make a big deal about it, but they just recently stopped production of all older Palm devices that run the original Palm operating system (OS). Instead, they are focusing on their completely new WebOS used in the Palm Pre and upcoming Palm Pixi. While this is no surprise given how the company needs to stop hemorrhaging cash, it is still sad to see this venerable operating system gone with such little fanfare.

Palm’s CEO Jon Rubinstein said:

We’re launching more great Pam WebOS products with more carriers, and turning our sights toward growth.

What Made Palm OS Special

Born in 1996, the Palm OS had three main things that made it special in my view:

1) Graffiti: The Palm OS had a modified version of handwriting character recognition called Graffiti. Unlike Apple’s earlier ambitious attempt at full handwriting character recognition in the Apple Newton, the Palm worked simply and reliably.

2) Applications: The Palm could load applications and games that you downloaded and installed yourself. This was before the concept of a closed-off Application Store, such as the for the iPhone or Palm Pre. Palm OS’s approach was less elegant than the modern app store, as many apps crashed and there was no single location to buy apps. Still, there were over 50,000 applications available online, more than any other PDA had at the time.

3) Synchronization: Unlike the Sharp Wizard or other pocket organizers, the Palm had sync software called HotSync which could deal appropriately with updates from the computer (using Palm Desktop) and the Palm. Although it wasn’t fancy, the synchronization worked great.

Corporate Fun

The corporate maze that Palm and the Palm OS went through was amazing.

Before the Palm OS’s development in 1996, Palm Computing Inc. was bought by US Robotics in 1995. US Robotics was in tern bought by 3Com in 1997. Palm was then spun off to its own company in 2000. In 2002, the Palm OS part of the company was made a subsidiary company to Palm named PalmSource. PalmSource (makers of the OS) then spun off to a completely independent company and licensed back the OS to PalmOne (hardware maker). In 2005, PalmSource was acquired by a company named ACCESS who then licensed it back to Palm, Inc (hardware maker, formerly PalmOne) in perpetuity.

As if that weren’t enough confusion, the original inventors of the Palm Pilot were frustrated and started their own company called Handspring in 1998. They made a competing device running the Palm OS called the Handspring Visor. In 2002 they started the successful Treo line, which weren’t yet phones. In 2003, they merged back with Palm (hardware maker) and formed PalmOne.

Sony also sold Palm OS devices until 2004.

OS Development

All this craziness hampered the development of the OS, but there were updates to the OS over the years. The last released version, 5.4 (Garnet), supported WiFi, Bluetooth, and multiple screen resolutions. However, the Palm OS was still not scalable or modular compared to Windows Mobile or the current Apple iPhone OS which competed recently with the Palm OS in Palm Treo phones.

Palm OS 6.0 (Cobalt) was announced in 2004 and was actually a completely new OS based on the acquired assets of BeOS. This was an attempt to truly evolve the OS. It provided modern features: multitasking, memory protection, and better graphics. This iteration of the OS never saw the light of day, however, as it did not get any interest from manufacturers and was never used in any devices.

Because the Palm OS was antiquated, Palm started selling both Palm OS and Windows Mobile versions of their Treos in 2005. Along with recently stopping production of Palm OS devices, Palm has just stopped production of all their Windows Mobile devices.

WebOS was announced in January 2009 and has now replaced Palm OS. If you need to run some old Palm OS applications, there is a third-party emulator called MotionApps Classic that runs the original Palm OS within WebOS. With the rapid adoption of WebOS and the Palm App Store, most people won’t need this.

Palm’s CEO Jon Rubinstein said on their August 28 2009 earnings call:

We had a really unique opportunity in being able to develop Web OS.. and the old Palm OS lasted us for 16 years, which is really amazing when you think about it. We are designing Web OS to last us for the next 10 or 15 years.

Off to OS Heaven

Although Palm OS has had a difficult life, it’s been the most dependable pocketable operating system for me until a few years ago. From my first US Robotics Palm Pilot 5000 to my Palm Vx (my personal favorite) to my Palm Tungsten 5 with color and WiFi, the Palm OS has been a great companion. It is now part of OS history, off to join other notables such as IBM’s OS/2 and the AmigaOS.

Palm Pilot 5000 Palm V Palm Tungsten T5

September 9, 2009

Flash Drive Speeds

What should be important to you when buying a flash drive, besides capacity? Speed and reliability.

Amazon and Newegg provide useful user reviews that can alert you to drives with high failure rates. I also look for good read and write speeds.

Read and Write Speeds

Speed tests can be calculated manually, but I used HD_Speed software to determine speeds of these common drives.

	Size GB	Read MB/s	Write MB/s
Kingston DataTraveler I	8	17.8	7.8
SanDisk Cruzer Micro	16	24.9	5.2
Corsair Flash Voyager	16	28.8	6.9
Kingston DataTraveler 200	64	28.6	10.7

The speeds will vary depending on the size of the files transferred (block size). Larger files can be moved more efficiently than smaller files.

As you can see, the write speeds lag the read speeds. The latest generation of flash drives, such as the Kingston DataTraveler 200, are often significantly faster than older models.

Fast read speeds do not always translate into relatively fast write speeds, as demonstrated by the SanDisk Cruzer’s slower write speed than the Kingston DataTraveler I.

Speed should be more important to you when looking at larger drives since you’ll really notice it when moving more data. People didn’t tend to worry about the speed of 3.5 inch floppy drives when they only held 1.4 MB of data.

Counterfeits

Another thing to watch for is counterfeits. Apparently there are several counterfeits of the Kingston DataTraveler 150 64GB often sold on eBay for around $50, less than half what they currently should cost. These drives still have 64GB of storage. They are just slow and prone to failure, leaving you without your data.