Recent content by tejones777

Great front panel, not sure why it wouldn't have a name or identifier on it though, unless it was a "service/maintenance/repair" device. Okay, I give up, what is it, and when was it made?

I don't understand... Is there any reason not to believe this is a 100 Megaohm resistor? Yes, that will test as "open" in many multimeters. In fact, I'm sure it has several picofarad of stray capacitance, so may even test as a capacitor in some testers. But 100 Megaohm resistors are...

That AS8 assembler for the 8008 was my doing many years ago. My goal was the most simple assembler that could assemble the Scelbi Basic (SCELBAL) assembly code, and allow anyone to modify it, and maybe put most of it in ROM. I was playing around with my reproduction Mark-8 computer, and liked...

Museums of all types are struggling, especially since COVID-19. When the "Computer Museum of America" in Georgia changed it's name to the "Mimms Museum of Technology and Art" I was sad. Not because they're honoring the amazing Lonnie Mimms, the founder who has done more for vintage computer...

Now that I've had a little time to stop feeling sorry for myself.... Good find!!! I've never, ever, seen the old Raytheon keyboard switches anywhere, other than on a Kenbak-1. A google search turns up an bulletin board referencing a keyboard that may have used them, but the link to the ebay...

What the heck!!! Where did you get some real vintage raytheon keyboard switches? I've looked everywhere, never found anything close! If you tell me you found them on a trip to Minneapolis, I'm gonna cry.

I'm perplexed. But since I never give up, here's my guess.... This is obviously a tool to help manually decode/debug teletype-like serial messages for a US Army intra-departmental supply ordering system (USAIDSOS, unofficially known as "You Said Help?") tested briefly in the 1960's. It cost...

I'm expecting we'll hear of a new computer history museum in Dubai or elsewhere in the middle east. It takes some pretty deep pockets to buy such things, and it seems Dubai is putting hundreds of millions into making itself a "cultural and vacation destination" that people all over the world...

Good news! I think the problem is solved! While I don't have complete confirmation from John Scott (son of Fred and Audrey Gruenberger) that he will release the copyright to the public domain (copyright expires in 2068 - 70 years after Fred's death), he suggests that may be the plan. Dave...

Interesting! That's 3.5 years out of the total 8-9 years, and the microfiche copies would be much better than trying to photograph a bound book. I'm not sure what a "renegade" is, but it does sound tedious to do anything with the over 600 pages of those 3.5 years of pages. But until the...

Thank you for the lead, Al! I'll try. I found Dave's linkedin profile, but can't seem to find any contact number or email. I found someone with his name who used to live in Simi Valley, and now is in Sacramento, and left a message for him (sounds like his wife's phone number, Debbie, though.)...

No responses, but I'm posting a short web page in hopes it may catch interested people searching google, and lead to some "leads." https://techarc.com/gruenberger I'm posting this hoping that someone, someday, may stubble upon this, and have more information, but this is a long shot.

Fred Gruenberger was a well known computer pioneer, author and professor at California State University, Northridge. He wrote 28 books on computing, and started the Computer Science degree program at Northridge in the early 1970's. In June 1973 he announced he was going to publish a monthly...

Bummer. None left. I had previously looked all over Axman St Paul several months ago, even searched in other bins and behind bins, hoping one or two was mis-sorted or fell out. Today I checked Axman in Fridley, and Axman in St. Louis park, the two other locations. All stores had a similar...

Man, you've put a lot of work into this! Would be interesting to archive all of your work and schematics, and code examples if you were willing to share. Those micro lights are amazing! Yes, they definitely look like the original lights. How many did you find? I've always tried to "decode"...