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  • ed_h's Avatar
    03-20-2017, 05:59 PM
    Apparently sodium power cables are (or were, at least) a real thing: http://dx.doi.org/10.2172/5949513 Ed
    17 replies | 824 view(s)
  • ed_h's Avatar
    03-19-2017, 08:35 PM
    ed_h replied to a thread OT CPU at 100%? in General
    Many moons ago when I was an undergraduate EE, we typically had a choice of microprocessors to use for labs and projects. We could buy a Motorola 68...
    44 replies | 1692 view(s)
  • ed_h's Avatar
    03-19-2017, 04:42 PM
    ed_h replied to a thread OT CPU at 100%? in General
    Me three. Had nothing but heartache with Windows update--both the process itself and some of the "updates". Anyone else had trouble with their...
    44 replies | 1692 view(s)
  • ed_h's Avatar
    03-18-2017, 03:37 PM
    ed_h replied to a thread OT CPU at 100%? in General
    I also had the plugin container.exe issue with firefox. This is on Ubuntu. Ed
    44 replies | 1692 view(s)
  • ed_h's Avatar
    03-14-2017, 12:20 AM
    I believe re-seating is the most effective way to fix a contact problem like that. Contact cleaner is more for contacts that open and close, so...
    24 replies | 1065 view(s)
  • ed_h's Avatar
    03-09-2017, 03:02 PM
    ed_h replied to a thread method for making a dome in General
    Bucky was a bit of an odd duck, but he was a media darling, so he got a lot of exposure. I'm not sure if his tensegrity structures would have caught...
    30 replies | 1970 view(s)
  • ed_h's Avatar
    03-09-2017, 12:19 PM
    ed_h replied to a thread method for making a dome in General
    Regular hexagon tiles will only produce a flat surface. Including regular pentagons at specific locations will pucker the surface into a closed...
    30 replies | 1970 view(s)
  • ed_h's Avatar
    03-06-2017, 03:40 PM
    ed_h replied to a thread Rocker Arm Attachment in General
    Yes, I see what you mean. I guess if you were going to sleeve the rocker bores and did that first, at least you'd have consistent bores to work...
    22 replies | 5922 view(s)
  • ed_h's Avatar
    03-05-2017, 12:09 PM
    ed_h replied to a thread Rocker Arm Attachment in General
    Dave-- Could you machine a cylindrical sleeve to locate the rocker instead of the cones? That should reference the ground surface to the bore...
    22 replies | 5922 view(s)
  • ed_h's Avatar
    03-03-2017, 06:08 PM
    ed_h replied to a thread OT understanding colors ... in General
    Yes, I'm not sure how the particle nature could be demonstrated at such low frequencies. I calculated that at a 1 km wavelength (about 300 KHz),...
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 04:21 PM
    ed_h replied to a thread OT understanding colors ... in General
    I don't think there is anything fundamentally different at longer wavelengths. The same duality should still apply. Ed
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 03:55 PM
    ed_h replied to a thread Electrolysis, and cast iron. in General
    It's easy to find a few references to it from the early 50s, but not many. OTOH, Youtube search yields a couple of thousand hits on the subject...
    43 replies | 2351 view(s)
  • ed_h's Avatar
    03-03-2017, 03:26 PM
    ed_h replied to a thread OT understanding colors ... in General
    You're right, of course. I was inappropriately limiting my thinking to RF communications. Thanks. Ed
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 02:31 PM
    ed_h replied to a thread OT understanding colors ... in General
    Absolutely true, but at RF frequencies, with which I have some experience, I can't think of any practical situations where it exhibits it's particle...
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 12:52 PM
    ed_h replied to a thread OT understanding colors ... in General
    AK, I know a lot of really good people who are not Objective Realists. With some effort, they can lead pretty normal lives. Ed
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 12:44 PM
    ed_h replied to a thread OT understanding colors ... in General
    Then it appears you are not an Objective Realist. Ed
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 12:15 PM
    ed_h replied to a thread Electrolysis, and cast iron. in General
    Lakeside is right. In electrochemical reactions it's the current that does the work, and for each process there will be an optimum range for current...
    43 replies | 2351 view(s)
  • ed_h's Avatar
    03-03-2017, 12:05 PM
    ed_h replied to a thread OT understanding colors ... in General
    Not if you believe in objective reality. If you do, EM radiation exists whether we are here to observe it or not. The color of the radiation has no...
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 11:34 AM
    ed_h replied to a thread OT understanding colors ... in General
    Color is a perception. Without a consciousness to perceive it, color doesn't really have a meaning. Ed
    75 replies | 3285 view(s)
  • ed_h's Avatar
    03-03-2017, 02:21 AM
    ed_h replied to a thread Electrolysis, and cast iron. in General
    In my case, it's usually a car part. I can remove it, derust it, replate or powder coat it, and typically have it re-installed all in the same day. ...
    43 replies | 2351 view(s)
  • ed_h's Avatar
    03-02-2017, 03:05 AM
    ed_h replied to a thread Electrolysis, and cast iron. in General
    Agree with J Tiers--Naval Jelly has phosphoric acid in it, but never worked well for me. I buy the acid as Prep n Etch, but it is sold under other...
    43 replies | 2351 view(s)
  • ed_h's Avatar
    03-01-2017, 10:26 PM
    ed_h replied to a thread Electrolysis, and cast iron. in General
    Electrolysis seems to be sort of an Internet fad for the last few years. I tried it out of curiosity, and it works fine, but no better than simpler...
    43 replies | 2351 view(s)
  • ed_h's Avatar
    02-09-2017, 08:49 PM
    ed_h replied to a thread HSM/MW back issues in General
    Thanks, flylo. Obviously I'd rather have someone come and take them away, but if that doesn't happen, I'll contact you. Ed
    5 replies | 416 view(s)
  • ed_h's Avatar
    02-09-2017, 03:43 PM
    ed_h started a thread HSM/MW back issues in General
    I've got close to 150 back issues of Home Shop Machinist and Machinists Workshop free for the taking. It's all or none, pickup in Omaha, NE. Anyone...
    5 replies | 416 view(s)
  • ed_h's Avatar
    01-29-2017, 08:54 PM
    ed_h replied to a thread Rocker Arm Attachment in General
    Dave-- I wasn't working in metric, but I got bushes that were nominally 1/16 larger on the OD than the rockers were on the ID. I couldn't find...
    22 replies | 5922 view(s)
  • ed_h's Avatar
    01-25-2017, 03:11 AM
    ed_h replied to a thread OT: Paint roller washer. in General
    Pretty cool. Indoors, I use one of those mechanical spinners like this one:...
    16 replies | 1429 view(s)
  • ed_h's Avatar
    01-24-2017, 10:19 PM
    ed_h replied to a thread Rocker Arm Attachment in General
    I made a little purpose-built fixture to do this on my belt grinder. Worked really well. A few more pics near the bottom of this page: ...
    22 replies | 5922 view(s)
  • ed_h's Avatar
    01-09-2017, 06:08 PM
    Something like POR15 would hold it for a while, but even the little pint cans are not cheap. How about coating it with JB Weld? Ed
    10 replies | 831 view(s)
  • ed_h's Avatar
    01-09-2017, 01:30 PM
    How many flights of stairs? Oh, no stairs? Piece of cake, then. http://bullfire.net/Mill/Milling%20Machine.html
    40 replies | 2734 view(s)
  • ed_h's Avatar
    01-08-2017, 06:22 PM
    flylo-- The "Million Dollar Challenge" was offered by the James Randi Educational Foundation. Since James Randi retired from the Foundation, the...
    107 replies | 37573 view(s)
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