All Activity
- Today
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Interesting what historical satellite imagery reveals ...
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Holy shitballs! That Dream Academy cover gave me the chills! Thanks, Stretch! And thanks too for the Cowboy Junkies post. I lusted big time for Margo in those days.....glad I finally saw them live after many many years. The Sun Comes Up It's Tuesday Morning video is wonderful too (my favorite song by them, followed closely by 'Cause Cheap Is How I Feel; two great noir-like narratives).
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Almir8890 joined the community
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Totally. @cetoole has a 1030 with the Varia. Went R+L at first, but later went with the camera version. Definitely nice to have! Congrat again; that's so hot. Oh, how was the commute?
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From Earth to the Moon | Making of UFO Documentary
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Kevin Gilmore's Amp Designs
Pubert Peepis replied to Pubert Peepis's topic in Headphone Amplification
It's been a while but I just wanted to say thanks. I am considering Spritzer's KGSSHV kit but a ton of the kit-excluded silicon parts are discontinued. Other things came up and slowed me down, now I am considering newer options like the carbon and maybe CFA-E, although the carbon has similar issues with part sourcing now it seems. Either way, this community seems to be the right place to look given the amount of documentation and focus on objective performance. -
https://www.youtube.com/watch?v=VZwyVbJYoUU https://www.youtube.com/watch?v=330Tc2qR28Q CHARAN-PO-RANTAN - tiny desk concerts JAPAN (1 & 2 / 2) Inspired by her performances on the latest Sheena Ringo live DVD/Blu-Ray
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Digikey recommended C3M0900170D as a replacement. Specs are mostly quite similar but Vgs(th) is slightly different, and the gate-source voltage curves look different from C2M1000170D. I believe this graph tells us about the gain and linearity? I am not at all well versed in transistors so don't take my word at face value. I looked at Wolfspeed's C3M lineup for 1.2-1.7kV, and basically everything had huge input and output capacitance or gate-source curves that didn't look as linear as the C2M1000170D. But again, I don't completely understand what I'm looking at, and will happily be corrected to learn. Edit: The domain and range of the graph is different. The 175C curve definitely seems droopier than C2Mβs, so itβs hard to know what itβs like at 40-60C or whatever we operate it at. C3M0900170D https://assets.wolfspeed.com/uploads/2025/02/Wolfspeed_C3M0900170D_data_sheet.pdf Wolfspeed C3M, 1200 & 1700V, TO-247 https://www.wolfspeed.com/products/power/sic-mosfets/?blockingVoltage=1200 V|1700 V&package=TO-247-3
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It's a 1030 Plus, so not exactly vintage. It's actually hugely helpful to have both a gravel and road computer. And the Garmin radar system is actually really cool. I'll probably add a second taillight to the mix for the pure road bike.
- Yesterday
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The Knuckledragger 3rd Memorial Slow Forum Post
Dusty Chalk replied to Knuckledragger's topic in Off Topic
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My priorities and listening queue are out of whack... Finally Arcadia by Alison Krauss and Union Station (2025) https://album.link/mx9hftt6ktmgp Example: Full of audio treats. {and yes this was triggered by the Rick interview that just dropped}
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The Knuckledragger 3rd Memorial Slow Forum Post
mikeymad replied to Knuckledragger's topic in Off Topic
Relevant to some in this forum... cool -
HP Justice joined the community
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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
I used a Mini Hot Plate when soldering the buck converter and inductor. First a thin layer of solder and then up on the plate. 150 degrees Celsius for a minute before up to 250. Rest of components are hand soldered. Thanks for the bridge tip. I have some small Schottky bridge rectifiers (CDBHD240-G) I intend to try first. -
Great to know that. You could further reduce the PCB size by using a compact bridge rectifier like the CSPB40K-HF. It has a much smaller footprint compared to standard rectifier packages and still handles decent current. Like the way how you fix and test the 2A3 tube. Recently, I purchased these soldering tweezers from JBC to perform SMD work. Nice and decent.
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We had a drooly cat who used to sleep on the amps. Every now and again I had to take the perforated covers off and wipe of the dried drool. Long gone alas - she got to a decrepit 19 and we had to say goodbye. In her heyday she was the scourge of the rodent population, including a family of rats that had defeated every other way of killing them.
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Sweet!!! When does the vintage ggarmin go up for sale? I was using my iphone then buddy gave me a Galaxy Fold 5. Didn't really consider the "ooops, I don't have a bike computer" thing until I was getting ready for a ride after I sold my iPhone.
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In the sprit of getting dirty I decided to list the Tarmac for sale and jump on this deal: It's a 2022 Cervelo Aspero 5 and the top of the line model at that. MSRP $10,500, I paid about 40c on the $ for it and the owner admitted that he bought it and essentially never rode it - condition backs that up. It also came with a like new Garmin head unit and tail light/radar setup which is pretty sweet. When I recently learned that they completed a ~9mi section of rail trail that can become ~50% of my morning commute I decided it was time to dive into the deep end. The color is something like "purple sunset" (cheers to you, Dusty) and is straight up wild. We'll see how the new modified commute goes tomorrow.
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That's an expensive cat warmer.
- Last week
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Megatron Electrostatic Headphone Amplifier
JoaMat replied to kevin gilmore's topic in Do It Yourself
Thanks to @Shawn, who found the device used in Elekit filament supply module, I now have a working DHT switched mode filament regulator βprototypeβ (in red circle). Board size 23mm x 15mm (0.9in x 0.6in) Soldering looks awful, but remember my eyes are 69 years old and my hands are not that steady. -
I'm sure the B2 pilots would be tickled to know they were flying fighters...
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Vernon Reid ripping as always...
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ABC of AFX.