On May 30, Chris Osborn alerted me on Twitter about a Reddit post announcing a Digital Equipment Corporation (DEC) PDP-11/34A computer system available for free in Indio, CA, about an hour and a half away from where I live. That sounded right up my alley, so I contacted the owner to see if I might be the lucky guy to adopt it.
Say hello to my new money pit… a 1989 Allegro M-28 Basement model RV made by Tiffin Motor Homes! At least I think that’s the model… it’s not marked anywhere I can find on the RV, and I have not yet gotten my grubby fingers on any old Tiffin brochures from that era.
At the moment, I’m hearing a whole bunch of traffic around 14.074 MHz in a digital mode that I don’t recognize. I haven’t been able to get intelligible text out of fldigi from this yet. From the amount of traffic, I wonder if this might be some sort of contest activity. Can anybody provide a hint about what this mode is?
This weekend, I gave The Orange Dragon a much-needed upgrade: a nice, big rear-view mirror.
My new Kubota L3301HST tractor’s loader valve developed a couple of minor (and as it turns out, related) issues. The fix was very easy.
At the 22nd annual Military Radio Collectors Group meet in San Luis Obispo, CA, I gave a presentation on an interesting piece of equipment called Audio Frequency Monitor AN/PTA-1. This set allows wiretapping of both two-wire and ground-return field telephone lines, using several different intrusive and non-intrusive coupling methods.
I discovered an issue with the alignment between the backhoe and its subframe on my tractor, which is getting it a free vacation at the dealer’s shop so they can take a look at it. I’ve also made a simple little upgrade to the implement height adjust lever stop.
The newest member of my motor pool is a brand new Kubota L3301HST tractor. Say hello to The Orange Dragon!
I bought this neat little piece of test equipment in an online Goodwill auction. Not much military surplus electronic equipment shows up there, but every now and then something cool pops up.
I found this 1950s-era Canadian military radio in an online Goodwill auction, of all places. It is missing its whip antenna, but a friend in Australia is helping me out with that. This one may be tricky to repair if it doesn’t already work, because all but one of the vacuum tubes are hermetically sealed into individual metal cans. The modular construction made these easy to repair in service, but I don’t have a stock of spare modules to draw from.
Thanks to David Reid W6KL, I now have my first Teletype Model 28! I’ve had a number of Teletype Model 33 machines over the years, but this is my first 28. I’ve always been impressed with the 28 machines I’ve encountered at Military Radio Collectors Group meets, so I’m happy to finally add one to my collection. This one was owned by Al Tipsword W6GER (SK) before David adopted it.
A friend of mine just brought me this old rack-mount chassis containing two " half height floppy drives. It turned out to be much nicer than just a box with a couple of floppy drives inside: It also contains a 7-slot S-100 bus backplane! So, now this begins my quest to acquire a set of S-100 cards to turn this back into a working computer.
I have decided to participate in Retrochallenge 2016/10, which is pretty much an excuse to spend the month of October working on a retrocomputing project. Ok, let’s be serious: That doesn’t really make October much different than the preceding or following months for a lot of us retrocomputing enthusiasts. But this month, it’s official!
I’m taking on an ambitious project which will almost certainly remain unfinished at the end of the month: Converting a DEC RL02 into a ginormous USB hard drive, so I can use it for imaging and writing RL02 packs!
My first computer was a Radio Shack TRS-80 Color Computer which my dad bought for Christmas in 1981. With a built-in RF modulator, it plugged into an antenna switch box mounted on the family color TV. That old Magnavox TV is long gone, but I still have that Color Computer.
A “holy grail” that I seek for my collection is one of the Radio Shack color televisions which were featured in advertisements for the Color Computer. There are two that I’m looking for.
After fixing the failed extruder thermistor on my Monoprice Select Mini 3D Printer, it didn’t surprise me at all when the heated bed thermistor also failed. Read on to see how I replaced it.