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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
Thanks. XGL6020 inductors are probably excellent. With TPS62913 I use Wurth 2.2uH 4.4 x 4.1 mm, which works all right. I don’t change anything when switching between 300B and 2A3 (except from filament voltage). Both tubes need 3.6K cathode resistors @20mA. EL34 needs 1.6K and EML 20B needs 0.6K. I use small daughter boards with resistors and jumpers to change cathode resistance. - Today
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That's horrible to hear. Sorry 😔
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Lulian20 joined the community
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Taimane Because: Yesterday
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What's the over/under on "Micro Greens" and "Foam" on the menu?
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Dang an entire kitchen just filled with people with tweezers..
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Yup smoker still works. I had a good chunk of it as sushi last night, sans wasabi, which bummed me out, but the fish was yummy. And the chunk of freshly smoked for supper tonight night was lovely. Also receently 10lbs of pork belly {not pictured}...
- Yesterday
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No words other than I'm so sorry, Dan. That's just horrible.....
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Holy shit. One of my closest friends from college was murdered not far from where she lived. Sunny was one of the toughest people I've ever met. I can scarcely process this.
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I used an inductor from Coilcraft, MPN: XGL6020-222MEC. The manufacturer claims it has the lowest DCR in the industry for its class, and it’s also very compact at around 6.71 x 6.71 mm. For the output voltage selection, I set it up with a few jumpers to switch between different resistor values for 2.5V, 5V, and 6.3V outputs. If you need help calculating those resistor values, just let me know. Also, I’m curious. When you switch from 300B to 2A3, did you modify any surrounding circuit parameters, or can you drop them in directly (aside from changing the filament voltage)?
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Figured i'd finally go through my tubes, sort them out a bit. Too many to catalogue properly in one go (which is why i never bothered) Was never quite meant to become the hoard it is, but.. left Luxman with crates worth of stuff, left ML with yet more crates, then isn't life funny when none are what you "wanted" for your then current system a few years later, so there you go buying more when they were still crazy cheap. Then you buy yet some more, because what if, right? You haven't got everything. And, yeah Sorted four 24"x16"x16" crates full of NOS tubes. I'd say 6-7 more to go; some other time. It's 23:28 and i'm spent. (actually 60x40x40 in cents, but i figure that's close enough?) So far am going with input/output/rec, US-EU/RU. It's gonna take some time. One of many things i miss dearly? Proper packing cartons. Yes, really. Nothing decent in EU. ECT/load-rated? Don't even ask, they'll think you're so funny. Not sure they know what this is down here:
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Car was set up for qualifying and also to defend on the straights during the race. However these conditions would have required more downforce. Despite not having the best strategy and the spin, still ended up P5 with that car. While it feels like he could be soon out of the championship fight, he might still have a big effect on who comes out on top at the end.
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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
With help of above Mini Hot Plate I managed to build another three small regulators. Here they are on a “motherboard” with rectifiers and electrolytics to achieve 12VCD. The trimmers are for adjusting output voltage, 2.5V for 2A3 and 5V for 300B. Now I want a regulator for 6,3V and 7.5V. The buck converter above is limited to 5.5V, so might try LMQ66430. @Shawn What inductor did you use with LMQ66430? -
Part 2 just dropped: Part 1, if you don't know it:
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Fakiros joined the community
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Sending a hug your way @skullguise.
- Last week
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Spent the 4th up in Maine, our condo association had a mini-parade of kids and golf carts (~ a dozen carts, several made up quite well); also a pic of my next-door neighbor Michelle and her two - used to have 4 - Samoyeds, beautiful pups! Also visited one of Karen and my favorite places, Cape Porpoise....sat and contemplated life a bit there.
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The Knuckledragger 3rd Memorial Slow Forum Post
skullguise replied to Knuckledragger's topic in Off Topic
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Well Hello Stern Grove SF Symphony in the grove! Ukulele hero antics from Taimane Hoops and "herbal" wafts, because SF. EDIT: (Shareable) SF Chronicle article for more context
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a) this looks great, b) a serving alternative would be that once it returns to a boil, add (white) rice equal to a little less than 1/2 the liquid volume (about a cup and a half for the written recipe) and stick it (covered) into the oven (350F) for about 20 minutes. I'd probably add a touch of salt, too.
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We went to Musaafer in the Galleria (Indian). It had been a few years and I have to say they have upped their game which was not too shabby previously. We went the tasting menu route and had to take the main dishes to go we got so full....first world problems. Here are a few of the dishes. HS
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