New subscribers?
Are new subscribers to cctalk still accepted? My subscription request was left unanswered. With all the talk about the future of this list I wonder if I came too late. Thanks Tom Hunter
Re: New subscribers?
On 21/06/20 6:49 am, Tom Hunter via cctalk wrote: > Are new subscribers to cctalk still accepted? Yes. > My subscription request was left unanswered. There is no outstanding subscription request for your email, and I don't remember seeing it. Given the email name I would likely have approved it immediately. > With all the talk about the future of this list I wonder if I came too late. I don't think the list is going anywhere in the immediate future. > > Thanks > Tom Hunter Lawrence (moderator!) -- Lawrence Wilkinson lawre...@ljw.me.uk Ph +41(0)79 926 1036 http://www.ljw.me.uk
Re: LK201 emulation
> On May 17, 2020, at 5:13 PM, Paul Koning via cctalk > wrote: > > Gentlepeople, > > I've been having problems with broken LK201s, so as a workaround I created an > adapter that connects to a standard PC USB keyboard and makes it look like an > LK201. It's based on an Arduino (specifically, Adafruit Trinket M0, an > amazingly tiny yet powerful small microprocessor). > > It's working at this point, though it needs a few small software tweaks to > make it complete. I'm going to turn my breadboard into something slightly > more polished. > > Question to the list: is this something that would be of interest to others? > If yes, I can make the design available. Perhaps the PCB layout and parts > list. I don't think I want to get into building units for others, though. > > paul Ok, I have a working device. The whole design can be found on Github: https://github.com/pkoning2/lk201emu As I mentioned before, I'm not providing parts, kits, or devices. Comments and feedback will be appreciated. paul
DECnet/E Y2K bugfix
I just made some small changes to the DECnet/E event logger application to fix a Y2K problem. (More precisely, a Y2K.003 problem). https://github.com/pkoning2/decstuff This is for RSTS V10.1. Just drop the new evtlog.tsk into [0,16]. paul
Imsai and others in Montgomery, AL
https://www.facebook.com/marketplace/item/960320167759670/ Guy is cleaning out his shed because he is moving. Not affiliated with seller, etc. Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-370-3239 cell sa...@elecplus.com -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus
Re: Malfunctioning VT240 - help please
On 6/21/20 10:41 AM, Jon Elson wrote: On 06/20/2020 09:41 PM, Charles wrote: On 6/20/20 8:31 PM, Jon Elson wrote: I confirmed the bad one by removing the piggyback and the failure returned. Now I need to desolder the bad one without ruining the board. I may just cut the leads off close to the bad chip, and solder the replacement to the stumps. (Normally I remove the legs and install a machine-pin DIP socket). Or just solder the piggyback and leave it there... thoughts? Cut the leads close to the body. Apply a soldering iron to each lead, and pull the lead out with tweezers, simultaneously heating and pulling. This is very gentle to the board, just doing one at a time. Then, you can vacuum out the holes and install a new chip or socket. I've done this many times, and never wrecked a board. Jon That's how I do it... the vacuuming is the problem. Someday I need to get a good vacuum desoldering station. Right now I just have a spring-loaded solder sucker (which I can do a pretty decent job with on most boards). But this high-density layout (2 traces between DIP pads) I'm a bit wary of. Just be gentle, and you should be able to do it. Also, in some cases, you might heat from the opposite side from the solder sucker. That way, you can keep the soldering iron on the pad until you have triggered the sucker. But, yes, the hollow soldering iron with powered vacuum is amazing the first time you try it. I got one at an auction years ago, it is much better than the regular iron and plunger-sucker. Jon The small company I first worked for had a Pace unit. I remember not being impressed with it - frequent clogs, pads lifting, and not getting all the solder out, no matter how we set things. Still beat solder-wick though! I got it done, but pin 16 (which connects directly to the internal-layer ground plane) was a bear. From the feel of it and the heat required, the draftsman didn't bother to make pad reliefs. Anyway it's now socketed, so of course it will never fail again! I also made a small jumper on a 15-pin D-sub to connect Monitor Present L to ground, so that annoying "Monitor Error 9" message stops ;) On to the next project!
