## How to disassemble a Marx 999 locomotive

Disassembling a Marx 999 locomotive isn’t too difficult, and it’s easier than the Marx 666, but it helps to have some instructions.

The nice thing about the 999 is that if you can disassemble it, there’s a long, long list of Marx locomotives that disassemble in pretty much the same way: the Commodore Vanderbilt, the Mercury, the tin Canadian Pacific 391, and the tin steamers 592, 593, 594, 833, 897, 898, and 994.

Marx designed its trains so that a father or older brother could service them, so it comes apart with simple household tools, and you can get most of what you’ll need to service it at the nearest hardware store, with the probable exception of the bulb for the headlight.

## How many Lionel CTC lockons you need

You usually need at least two Lionel CTC lockons, but most Lionel O and O27 train sets came with a single CTC lockon connector.

If your train slows down as it gets farther away from the transformer, that’s the biggest tell-tale sign that you need at least one more lockon.

## Available diameters of tubular O and O27 track

A frequent question, especially for those who are just discovering or rediscovering vintage Lionel and Marx trains is what sizes of track are (or were) available, and how many pieces come to a circle.

Unlike other scales, Lionel marketed its track by diameter, not radius. As you undoubtedly remember from geometry class, radius is the distance from the center of the circle to the edge, while diameter is the distance from edge to edge. So a circle of O27 track is approximately 27 inches wide. O27 track stands about 7/16 of an inch tall, while higher end O gauge (also sometimes called O31) track stands about a quarter inch taller, at about 11/16 of an inch tall.

While we’re on the topic of track, here are some tips for connecting track if your new track isn’t going together as easily as it could.

Here are the available sizes, in ascending order.

## Replace Lionel O gauge track pins with nails

Here’s a question that came in recently: Can you replace Lionel O gauge track pins with nails?

Yes, but with a caveat. Read more

## Make your own null modem cable

One of my coworkers needed to make a null modem cable last week, and most of the sites he found made it far, far too difficult. Here’s how to make your own null modem cable.

Most of the time, you only need three pins. In fact, I never needed more than three pins, no matter what I was connecting. Usually, a 3-wire null modem cable is more than sufficient.

## Upgrading a Compaq Evo D510 for Windows 10 and beyond

I had an old Compaq Evo D510 full-size tower/desktop convertible PC, from the Pentium 4/Windows XP era, that I wanted to upgrade. The machine long ago outlived its usefulness–its Pentium 4 CPU is less powerful than the average smartphone CPU while consuming enough power to be a space heater–but the case is rugged, professional looking, and long since paid for. So I thought it was worth dropping something more modern into it.

I chose the Asrock Q1800, which sports a quad-core Celeron that uses less than 10 watts of power and runs so cool it doesn’t need a fan. It’s on par with an early Intel Core 2 Duo when it comes to speed, which won’t turn any heads but is plenty fast to be useful, and the board can take up to 16 GB of DDR3 RAM and it’s cheap. I put 16 GB in this one of course. I loves me some memory, and DDR3 is cheap right now.

## Replacing Lionel O gauge track pins with nails

Here’s a question that came in via an unknown search engine: Can you replace Lionel O gauge track pins with nails?

## Why the Target data breach news keeps getting worse, and what you need to do

As you probably know, last year some still-unknown criminals stole a whole bunch of credit and debit card data from Target. And the story keeps changing. First there weren’t any PINs. Then they got the PINs, but no personally identifiable data. Well, the latest news indicates they got credit card numbers, names, addresses, phone numbers, e-mail addresses, and for a whole lot more people, and probably from a longer length of time than just late November to mid-December.

There are a few things you ought to do if you shop at Target, which many people do. Read more

## Cutting through the fluff around the Target PIN breach

OK, so Target is back in the news, and it’s nowhere nearly as bad this time but there’s some posturing and some fluff in the news, so I’ll take it upon myself to demystify some of it. Some of it’s PR fluff, and some of it’s highly technical, so I’ll cut through it.