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  1. (*steve*)

    Memory investigation on an HP35665A and bad desoldering

    (Yeah, this doesn't sound like a repair... but just wait.) I have a couple of HP35665A's, one with 2MB of RAM, the other with 4MB. Just out of interest I decided that I would try to upgrade the RAM on one of them to 8MB (the max). When these were sold, memory upgrades were a board swap. 2MB...
  2. (*steve*)

    Hey, have you seen one of these?

    Look what I just bought. (I've cropped the image so you can't see the name) Any guesses?
  3. (*steve*)

    All in a day's.... work?

    OK, so I'm finally able to stand for reasonable periods and move about without a lot of pain, so I decide it's time to calibrate my HP428B clip on milliammeter. As an aside, it's got real live vacuum tubes in it, and is the first piece of test equipment I have purchased which is older than I am...
  4. (*steve*)

    Anyone here in Melbourne?

    ... And who could do me a rather large favor?
  5. (*steve*)

    Why are Anritsu manuals so hard to locate?

    It might seem bizarre, but their service manuals are easier to locate than their operator manuals! Looking for a manual for MG442A/ML424A/MN415A, AKA an ME447A. Edit: I'm only after the manuals to see what these devices actually do :-) The observation that the manuals are really hard to find...
  6. (*steve*)

    Organising my workshop.

    Well, I finally couldn't stand in my workshop and had absolutely no free bench space. Time to clean up and arrange my equipment so it doesn't take up so much space. At least one corner is tidy!
  7. (*steve*)

    Constant voltage load

    I'm building a constant voltage load for a future project. These are standing in for a 12V lead acid battery so I can run tests without worrying about overcharging the battery. I've breadboarded this up and tested it briefly this afternoon. (Then we had guests, so my time evaporated). Can...
  8. (*steve*)

    Laser cut boxes.

    I've recently gained access to a laser cutter and have used it to make cases for some of my projects. I found the existing tools on the internet were very limited in the boxes they could create, or required almost everything to me done manually. I decided to write my own program to help me...
  9. (*steve*)

    Fun and games with autotransformers

    I am the proud owner of a device advertised as: Device: 12A 12101604 * AC Voltage Taps 204V,210V,216V,221V,240V Size(LBHmm):120 x 120 x 45 Mounted on a base plate Weight: 4.2kg ** Note these Transformers are new and un-used but have been pulled out of equipment. The transformer has a mass of...
  10. (*steve*)

    Toner transfer for PCBs having BGA packages on them

    (*steve*) submitted a new Showcase Item: Toner transfer for PCBs having BGA packages on them Read more about this showcase item here...
  11. (*steve*)

    Sous Vide cooker, elasticity, and meat

    (*steve*) submitted a new Showcase Item: Sous Vide cooker, elasticity, and meat Read more about this showcase item here...
  12. (*steve*)

    High(ish) power passive dummy load

    (*steve*) submitted a new Showcase Item: High(ish) power passive dummy load Read more about this showcase item here...
  13. (*steve*)

    Why I haven't been posting too much this weekend.

    edit: Don't look if you're a bit queasy about blood I was unsure whether the humor thread or the graveyard thread was most appropriate. I couldn't decide, so I started a new thread. It's a "cooking injury", not my wife's efforts to bonsai me.
  14. (*steve*)

    Power meter didn't work :-(

    (*steve*) submitted a new Showcase Item: Power meter didn't work :-( Read more about this showcase item here...
  15. (*steve*)

    Digital temperature measurements

    (*steve*) submitted a new resource: Digital temperature measurements - Calibrating your finger for more accurate subjective assesments. Read more about this resource...
  16. (*steve*)

    How a BJT Transistor works (base current version)

    (*steve*) submitted a new resource: How a BJT Transistor works (base current version) - A simple (if not absolutely accurate description) of how a normal transistor operates Read more about this resource...
  17. (*steve*)

    Using a bipolar transistor to turn a load on and off

    (*steve*) submitted a new resource: Using a bipolar transistor to turn a load on and off - For situations when your microcontroller (or whatever) can't do it on its own. Read more about this resource...
  18. (*steve*)

    Do I need a heatsink? How big?

    (*steve*) submitted a new resource: Do I need a heatsink? How big? - A simple inroduction to heatsinking components Read more about this resource...
  19. (*steve*)

    Photos with phones

    (*steve*) submitted a new resource: Photos with phones - How to take a good closeup image with your phone Read more about this resource...
  20. (*steve*)

    Looking for a component marked "made in Austria"

    I have found some very old (but in totally pristine condition) components that are marked "Made in Australia". I want to make something up to send to Dave Jones, but I need a part labelled "Made in Austria". Can anyone help me? If you don't know why sending something marked with "Austria"...
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