Price: Not For Sale
I know it is easy to impress me with unusual clocks, but this one really stands out. I found this clock through an eBay auction for a very unusual F9020AA Nixie Tube. Not only is this tube huge (it is nearly as tall as a B-7971), it is also flat. I have never seen any other nixie tube with this design and I am having trouble finding more information on the tube itself. (As an interesting note, six tubes like this was posted 1/24/2010 and it sold within 24 hours for $550 each.)
The dimensions are: (Height: 133mm (including nipple and pins) - width: 63mm - thickness: 34mm - digit height: 60mm - digit width: 40mm)
(images used with permission)
Price: 35 SGD ~ $25 USD / eBay buy-in-now
I just found a great little one-digit nixie clock on eBay. The designer did a great job of fitting the timing circuitry, the power supply and display driver on a business card size PCB. The majority of the components appear to be surface mount so you could easily repackage this in a more polished display. For $35, this is also probably the cheapest nixie clock you can buy.
The clock itself works like most single digit Nixie clocks. There are four LEDs across the bottom representing HHMM. When the first light flashes, the tens digit of the hours is shown, then the units position of hours, then tens digit of minutes, and finally the units digit for minutes.
One other notable attribute to this clock is the fact that it is USB powered. For most clocks this isn't practical as the current is limited to 500mA on USB but it is more than sufficient for something this size. The designer did a great job integrating the power supply on the board and even managed to add a battery backup. It appears to be a mini-USB connector but I need to verify this with the seller.
No information is given about the time keeping mechanism.
The tube is an "SZ-8(QS30)" according to the YouTube Channel.
There are two downsides that I can see to this auction. First, the seller has 0 feedback. I am bidding on one right now (as opposed to buy it now) and I'll report how it goes shortly. Second, the clock doesn't come with any enclosure. It is highly unlikely that you will be seriously harmed touching this in operation, but picking up this clock while in operation might give you a bit of a shock. Additionally, if it comes in contact with any metal objects while in operation, it may damage the device. This is true for all exposed PCB clocks, but it is worth pointing out.
All of the images and videos are provided by the seller and used with his permission.
If it is half as good as it looks, the seller should raise the price by 100%.
Price: TBD, currently $103 on eBay
I just found this clock on eBay from a new seller, Pixeldesign2009. It is based on a Russian IN-8-2 tube and has a built in time base. No more information is provided via the auction other than it has a "built in RTC clock." I am guessing that it is just an inexpensive mechanism as precision does not seem to be the focus of this device. Additionally, based on the description, this appears to be 24-hour mode only. Lastly, no information is given on whether this is a directly driven display or multiplexed.
With all of that said, this could be a nice addition to any collection. The tubes are pretty small and while no dimensions are given, I am guessing the clock is no wider than 6 to 8 inches. The case appears to be a black plastic and does not appear to be a kit of any kind. For $100, this isn't a bad deal.
I contacted the seller via eBay and asked for more information on this device. The following information was provided:
Price: TBD currently $300 on eBay
Tube Hobby has a handsome, fully assembled IN-18 clock with a wooden base for sale on eBay. The current price is just under $300 with 4 days left on the auction. Below are the specs provided in the auction but please visit the ebay link below to learn more. They have provided links to the data sheets and the user manual at the bottom of the auction.