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Showing content with the highest reputation on 03/31/2021 in all areas
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6 points
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I still like Le Tonkinois No. 1 for a hard finish and Tried & True Original Wood Finish for a more natural low luster finish3 points
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Happy Birthday Doug! You have been such an inspiration to me over this past year. Look at my latest. I call it Homage to Doug.2 points
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G. Gordon Liddy, Mastermind Behind Watergate Burglary, Dies at 90 This is the obit he deserves. Born George Gordon Battle Liddy in New Jersey in 1930, he is said to have been a frail boy who was inspired by the rousing radio speeches of Adolf Hitler that residents in his German American neighbourhood were listening to at the time. "If an entire nation could be changed, lifted out of weakness to extraordinary strength, so could one person," he wrote in his autobiography Will, recalling how he roasted and ate a rat at the age of 11 in order to overcome his fear of rodents. Some of the extreme ideas he, and colleague Howard Hunt, a former CIA officer, came up with - from plotting to kill Nixon critics to kidnapping anti-war protesters - never got the go-ahead, but their plan to bug the Democratic National Committee offices did. Also https://www.nytimes.com/2021/03/30/us/g-gordon-liddy-dead.html?referringSource=articleShare2 points
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Photographing the "endless diversity" of America by streetlight https://www.bbc.com/news/in-pictures-56253450 https://danielfreemanphotography.co.uk/2 points
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I always do smd soldering with fin tip solder iron and after a long time of practicing I feel quite comfortable with that. I’ve tested with hot air station and with proper amount of solder paste on the pads and when using low air flow I managed to solder without components blowing away. And it’s a nice feeling seeing a component nicely aligning up on its pads. But I prefer the soldering iron technique. Me and solder paste don’t mix well. After a while the whole table is a mess and I even have solder paste on my nose. With some practice I’m sure everyone can do smd soldering, but it can be very frustrating initially.1 point
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Opeth - Blackwater Park How is this album 20 years old (released March 2001)?1 point
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No, not at all. The 500t is more similar to the 600ltd amp with presumably a bit lower rail voltages but still the same circuit as the T1. I have a 700t here and it is terrible in stock form, just awful. Utterly lifeless but adding a CCS really transforms the thing into something decent.1 point
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Very nice pictures, fantastic work! Next would be to integrate a roon endpoint with a Raspberry Pi and add a network port to it 🙂1 point
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@starcat I have boards. Ping me if still interested. Location Sweden.1 point
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joke { 5 digits is too low accuracy, you need at least a 8.5 digit multimeter calibrated monthly in a sealed controlled environment and Faraday cage. The resistors should all be 0.01% 5ppm or better and the leds need to be curve traced from 0V to 5V and matched within 0.01% on current. This should make the LV psu board more expensive and time consuming than the rest of the amp. 🙂 } /joke I don't know if the cfa has any special requirements but for both my blue hawaii and mini t2 builds I went for 1% 50ppm resistors, - koa brand. I did not match the leds other than they where all from the same reel and so had the same nominal specs. I aim for voltages within 1% of the target given I use 1% resistors. The ppm of the resistors will effect voltage drift with temperature, if you want good accuracy and stable voltages build the board with low ppm 1% resistors, measure the voltages, calculate the error and replace just the resistors that set the output voltage. I don't see any point in spending lots of money on better resistors everywhere when I can spend the money I save on music or other vices 😉 ...1 point
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The regulated output voltage is: for V+: ((R8 + R7) / R7) x 10 (reference voltage of D5 - LT1021-10) for V-: ((R9 + R10) / R10) x 10 (reference voltage of D7 - LT1021-10) On the goldenreference4 board silkscreen, R7, R8, R9 R10 are all 1.5K. R7 and R8 are connected and R9 and R10 are connected. R8 and R9 are the 1.5K resistors closer to the DN2540 on each side of the board. The 10R is for ground connection ( from iec input ground to power suppy ground) and is optional. I personally never populated it on all the GRLV I've built.1 point
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Larry McMurtry, author of The Last Picture Show, Terms of Endearment, Lonesome Dove, and Brokeback Mountain dies at 84. https://www.bbc.co.uk/news/entertainment-arts-56542882 I’m always going to remember him though for All My Friends Are Going to Be Strangers, a novel about not fitting in in San Francisco, while wasting time at the cinemas, a book I read when I moved to San Francisco and wasted lots of time in cinemas.0 points