Відео

What a beast of a machine! Maybe 50lbs?

Thank you for sharing this! I am looking to do something similar. It is very helpful to see how certain machines fit in the space. Would you be able to share the key dimensions? How wide each side is, the depth, and the height of the bottom vs other shelves?

VARIAC IS NOT A TRANSFORMER! It has no galvanic isolation - output is connected straight to line!

Had one exactly like this, parents got it used in 1988 when I was 8 years old

Great jorb! I appreciate you guys fixing the bathroom stall door at the Denny's as well.

What was your total materials cost to build this rack? I really need two or three of these in my garage. Great work you guys did!

I loooove ELFL. <3 Great pick for a backing track.

Pro tip - if you can, always go to Home Depot/Lowes to pick your lumber at night - an hour or two before closing is ideal. The store will be near empty, and you can take your time sorting through 2x4's without getting in the way of the contractors that are there during the morning/day.

Videoing a project makes it take at least twice as much effort. Thanks for taking the extra time to share this with us. Vicariously satisfying. :)

I love the Cobalt and Cubes, which I had one , Jealous lol

Would have been tempting just to walk out with the Husky steel shelving racks instead of going to all that work. Same price and you have an asset you can sell down the road.

I love it! I used to build servers out of PS/2 80 - nice setup!

I took the first production order on their 1200 baud modem. I worked at Hamilton Avnet and the engineer hand wrote the order on a broken chair, on the second floor of a building on Lake Street near Halstead. My order actually was the Intel portion. 2920s, 212s and I believe 8049s micro controllers and 8749s.

OS/2 is the best OS for doing such a thing, using the SIO serial drivers to emulate COM ports for telnet connections. I added telnet access to my Renegade BBS in 1997 in that way, after I got a cable modem for high speed access.

Wasn’t netware it’s own OS? I had my CNE decades ago but it’s all so blurry. Remember setting up with 30+ floppies and then having to compsurf the disks for days.

21:06 Looking at the holes in the case, your board looks significantly bent in comparison, since you also seem to have narrowed it down to that area, id check all the solder joints in the area, possibly just reflow them all.

Check all your control voltages to spec , at a bunch of different components? Just one of many ideas. Although you may have already done

why didnt you reflow the boards and clean them?

not me flinching while disconnecting the PWR supply

Please, could you make a video about a portmaster equipment, I want to see the insides of the machine when you have time after you are done with the other series. this made me curious ua-cam.com/video/GQ0KTtMQ_8s/v-deo.html

The quality of components used were amazing even when these are from 1988 it's unbelivable

What an amazing musical taste at 5:20...

For anyone reading the comments wondering what the acronym POP stands for its Point Of Presence

36 years ago fiber was being used...till now its every where for networking why did it take 36 years

I did this in 1996 so roommates can check their email via telnet. Same or almost the same system too.

Fantastic video! Just a heads-up - I'm sure you know this, but I've heard that a lot of the switching supplies from this era can fry themselves if you don't supply dummy load.

So the first Ethernet bridge is created to combine two Ethernet bridges? Why?

Beige = Buy , That's the Spirit! 😆

god damn look at the size of those capacitors

I wasn't born at this time and to me 10M is painfully slow (yet I started my life browsing internet on a DSL [and i still use 56k modem for my job]). Idk why but seeing people repair stuff is for me so beautiful.

yes, the outer packaging is bad. But I'm afraid the plastic is extremely brittle and would not have survived transport well. I have sorted out a number of devices because the housings broke when I touched them. I wanted to repair a calculator. Only the electronics were ok, but the housing fell apart due to brittle fractures

I have seen so many caps leak of that age and destroy the boards. I worked in a small plant that hand assembled devices along the size of that. I had a station where I populated the boards with devices and hand soldered them on.

Wish things were still made in America

Yeah. Why did you let the seller get away with this? You should've returned this.

I would really like photos of both the USR and the Hayes modem boards, at least being able to make out the chip markings and layouts. (mink, who is an 8051 fanboi)

Oh lovely, the 8049 (judging by the datasheet I found) seems to be an ancestor of the MCS-51. Which is still used in new designs to this day. I did not get to study the board, but I would not be surprised if one of those two CPUs was bit-banging serial.

Professor McConnell who is credited in the manual is somewhat famed. Enough so that around the time of this modem, Ted Kaczynski decided to send him a letter...

5:16 is real art 😍

that hurt a bit to watch you use a #1 screw driver on #2 screws and strip them slightly

I sure wasn't expecting a Hand Tool Rescue cameo lol. That gave me quite the spittake. Also, what a truly beautiful video. Really. It should be on the first channel imho. Thoroughly enjoyed it

I have habit of typing out ATDT myself.

7:50 safety tip: do high voltage stuff with one hand, and keep your other hand somewhere safe like behind your back (not touching anything grounded obv). either attach the clips one by one, or use some probes u can hold like chopsticks. your arms are a pair of wires made of meat, connected roughly in series with your heart. if you can ensure one of those two wires is left floating, then at least in the case of DC or low-frequency AC, you *theoretically* can't form a circuit that includes the heart. not perfect, if the shock forces your muscles to contract, good luck controlling where either of your hands end up, not to mention your arm not actually being a perfectly homogenous conductor that'll form a perfectly predictable current path, or the fact that your other hand is never truly floating due to capacitive coupling. but always seemed like a smart way to get a small bonus to survival probability should all the other precautions fail.

By putting glues around the speaker you have restricted air from the rear, speakers don't work that way

The original advertisements are cool ;D I actually found few more that are equally hilarious and fun. In terms of power supply. this MC7805CT has dropout voltage of 2V at 1.0A, so something above 7V should be good for it, lets say 8V to be not too close tho. The there will be a about 0.6-1.2V via the diode. So I think in total 9.5V would be close to optimal. 12V will work, but will make voltage regulator quite hot. Also you do not need AC 9.5V. DC will work too. In fact testing with DC lab power supply would be way safer due to accuracy and ability to set current limits.

I worked only a couple of years back for an international company. In all our offices around the EU, the network guys (external partner) still used these to dial into the console port of cisco routers and swtiches they provided if they had issues preventing normal access. When we were decomming their kit, they were more interesting in getting these modems back than anything else. Obv. solid, dependable and of course they could not replace them.

My year 😍

1970s: Company demands you buy a product from them to use their service. Government intercedes. 2000s: Company locks you into a walled garden, prohibits repairs, encases everything in DRM, charges a premium for access to services, and then buys or starts a media company. Government: "... Seems fine."

Are 1200 baud modems like this actually hard to find? I've got a bunch of no-namers like an Easy data 1200D.

9V AC was kind of the de-facto power supply back then, as serial devices needed + & - 12V for the serial port drivers, and simple half wave rectifiers were the easiest way to get it. Back then most serial ports used 1488 & 1489 IC's It was not until much later when chips like the MAX232 came out that could synthesise these rails from a single 5V rail, the standard for logic at that time (long before someone came up with 3.3V logic) that these AC powerpack supplies started to disappear.

I owned one of these modems, a replacement for my TRS-80 direct connect 300 bus. This made me the envy of my friends.