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Craig Sawyers

High Rollers
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Posts posted by Craig Sawyers

  1. The news gets worse and worse for Turkey and Syria. Another aftershock hit a number of hours ago.

    Rescue workers are having problems because roads are out. The airport is so full with rescue workers that incoming aid relief are having to wait in the planes on the tarmac until the airport is clear enough. There are those still alive and knocking on pipes from below the rubble waiting for rescue to arrive and relatives digging with bare hands.

    Made even worse by truly awful weather conditions

    My heart goes out to Syria too - war torn, and only one open border crossing with Turkey.

    RIP the thousands who have died.

    https://www.theguardian.com/world/live/2023/feb/07/turkey-earthquake-syria-in-turkiye-2023-live-updates-latest-news-map-magnitude-7-8-scale-quake-tremor-death-toll-gaziantep-kahramanmaras

     

    • Sad 6
  2. Even if you eliminate those causes, you can be plagued with RF and other breakthrough into wiring, scope probes etc.

    I chased my tail with this in attempting to make sensitive measurements to an active crossover containing a whole bunch of opamps. There was what looked like oscillation in the high tens of kHz. I was using a compact Tektronix oscilloscope. After well over an hour, I turned the scope on its its edge instead of on its feet. The "oscillation" disappeared. It was interference from the oscilloscope switched mode supply.

    When making high sensitivity measurements I have to turn the heating off - the microprocessor based controller shoves out a whole bunch of interference (Honewell). And the LED ceiling lights - similar garbage from the rubbish SMPS's.

    There is a guy who installed LED lights in his radio shack - and got a massive level of garbage into his gear. He ended up making a linear supply for the lights, which sorted the problem.

    This and the next page http://www.chavfreezone.me.uk/2018/LED-Driver-QRM.html

  3. Oh crap. Another legend. Saw him and Graham Nash in Birmingham (UK) some years ago At one stage Nash said to Crosby "Play nicely, or you'll have to play with Neil and then you'll go deaf!"

    Actually Neil Young was second choice. They approached Steve Winwood - but he turned them down because of recording and gig commitments. So the band was almost Crosby, Stills, Nash and Winwood, 

    RIP David Crosby.

    • Thanks 2
  4. On 1/4/2023 at 6:06 PM, VPI said:

    More sticks for the bench. 
     

    7FDFE6DD-2F23-4B28-9AE1-0575D690F915.jpeg

    The problem I faced when making my bench (the classic Klausz design) was - you need a bench to build a bench. A real chicken and egg thing. Had to get a free engineer's bench to build the bench on.

    Built the top out of quarter sawn beech with a sapele underframe. Absolutely solid, zero racking no matter what I'm doing.

    Mind you, your workshop is much much bigger than my converted garage - seriously jealous!

  5. Bloody hell. Block! He did a section on Top Gear a few years ago, showing what you could do with one of his more outrageous cars.

    But to go from a snowmobile accident is in the same ironical class as Yuri Gagarin dying in a plane crash (aged 34).

    RIP Ken Block. Driving legend.

    • Sad 3
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