Review: Litronix 1102 - Spookalculator

It's Halloween, my favorite holiday of the year! For some reason this isn't a federal holiday, so I have class tonight and won't be able to take part in the festivities. But I'm going to do the next best thing: review my spookiest, scariest calculator! Prepare yourself for a few paragraphs of fright and terror as I review what I've nicknamed "The Zombie Calculator."

I found this device for $1 at a yard sale, and it looked like any normal vintage calculator. There was no hesitation to purchase it from the old lady quietly knitting something in the corner of the garage. She gave me a slight smile, and little did I know that this was probably a knowing, sinister smile...

The Litronix 1102 -
Looks like any other vintage calculator, right?

It sat in my car as I explored the other sales that day, and I hardly thought about it after making the purchase since I had found plenty of much cooler stuff. It came home with me and was added to the pile of calculators I'd need to inspect and possibly repair. That's how these stories always begin, isn't it? No one ever expects to be in a horror movie at the beginning. There's always this moment when they realize that something is not quite right.

That moment came when I finally got around to testing the Litronix 1102. It didn't come with any batteries, which explained why it felt so light, so I grabbed a handful of AAs and opened the back panel. Now, I'm no stranger to corrosion, but nothing could have prepared me for what I saw.

The corrosion was really bad, is what I'm saying.

I tried to install the batteries anyway, hoping to just see if the thing worked, but the metal just snapped off. There was no way I was going to be able to use this calculator without some serious effort. So I ordered some conductive tape and got to work.

The first step was disassembling the device. Two screws beneath the metal serial plate were all that held it together. I have no idea why Litronix chose to do this, because I had to remove the plate to get inside.

The corrosion on the battery terminals was severe. They needed to be completely replaced if I was going to get any sort of connection. Fortunately, I had my conductive tape and a pair of scissors, so I made some of my own.

I also covered the still-working parts just to ensure good connectivity. I placed electrical tape over parts that didn't need to be exposed to prevent unwanted conduction. 

Now it was time to see if my efforts were worth it. I put the batteries in before reassembling so I could see if the calculator would even turn on. The corrosion on the battery terminals wasn't a problem anymore, but this is a very old device. There may have been corrosion in places I couldn't get to, or there could be other problems that require more expertise to fix. 

Amazingly, it started right up! I had brought a calculator back from the dead! It was hungry for calculations, so I ran a few to satiate it. After some adjustment and refinement of the connections, it was time to put this zombie calculator back together.

It didn't fit perfectly back together due to the added material, but it holds together strong enough to live on. This scary tale of calculator repair has a happy ending after all. Or does it...?

I realize this isn't much of a review, but the video review goes into detail about what I like about it. This calculator was built in Malaysia and released in 1974, runs on four AA batteries, and is pretty good. There is another version of the 1102 that runs on three AA batteries placed horizontally, but from what I can tell, every version of the 1102 suffers from severe corrosion on the battery connectors.

Not previously mentioned: the battery cover looks terrible.

It may be back from the dead, but can we really be sure that we're safe?

Happy Halloween!

Review: Casio HL-802

Casio HL-802 front view

Sometimes all you want from a calculator is the most basic of functionality. Maybe you just need to add up your expenses for the month and multiply the total by twelve to see if you can survive a year. Or maybe someone mentioned the number 38,703 and later that day you thought of the number 19.3 and wondered what 38,703 divided by 19.3 is. Sure, you could do all of this in your head, but can you really depend on your brain to handle these sorts of operations?

The Casio HL-802 can do the aforementioned things, and a few other things. It has no special features, but it handles what it can do extremely well. Each button is clicky and responsive, with zero delay between press and appearance on the LCD screen.

What's remarkable about the device is how solid it feels. Even though it's nearing forty years old, the plastic has retained its strength and the calculator feels very durable. Gripping the top and bottom and attempting to bend the device gives hardly any yield. The screen is protected by a scratch-resistant plastic or glass that can withstand a reasonable amount of pressure. In addition (haha), the design of the buttons helps prevent dust or debris from getting between them and the brushed aluminum face plate.

The HL-802 exudes it 1980s aesthetic in just about every aspect of its design. This was a bit before solar powered devices really caught on, so it runs on two AA batteries. Few calculators these days dare to be anything other than black or grey, so the dark brown really caught my eye, especially due to its contrast with the face plate. The only thing that ruins the appearance is the crummy looking label on the top right. It looks like a sticker and uses all the wrong colors, but it is in fact embedded into the device and won't come out easily. Everything below that looks great though.

I have no recollection of where I got this calculator or how much I paid for it. It doesn't appear in any pictures of my collection, and it's not in any of my Ebay purchases.

Back view - battery cover removed

Back view - fully intact