10-channel amp/DSP/WiFi for the Return of the Marthas. Lots of wiring in progress, with lots of software to follow.
Lol those look like two Daleks who wanted to go to a rave 😉
ex-plur-mi-nate!
ex-plur-mi-nate!
Hmmm... Maybe I should add some motors and lasers to make them more interesting? Nah 🙂.
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TB TL Update:
XO's were assembled on the bench and connected to speakers earlier this week.
I've got approx. 20hrs of run time so far. Wow, I'm super impressed with this speaker package! Deep bass, crystal clear vocals and just the right amount of sparkle, very balanced sound overall.
Thank you X, you did a fantastic job whipping up an XO for the W8-2314 and suggesting to drop it into the FAST TL cabinet!! I hope the availability of this driver will increase so more people can build this speaker, its a keeper👍
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I’m glad the XO worked out and that you enjoy the sound. What a pleasant surprise to learn that the TL cabinet has a drop in swappable woofer in the W8-2314.
Nice foil inductor! How do you stick those into a Wago connector? 🙂
Nice foil inductor! How do you stick those into a Wago connector? 🙂
You know you are close to finishing a project when you are designing the custom cut foam inserts and the artwork, and the carton itself that the amp ships in.
What is on the bench indeed, capable of 180Vpp into 5ohms?! Not very often have I had to use 50V/div on my o-scope. The dummy load needed to be fan cooled that’s for sure.
You do the math. 🙂
Meanwhile, on the other bench, one meant specifically for pushing paper, I just cleaned up a room used for storage for past 3 years and turned it into a paper pushing bench, complete with Vanguard speakers and a T9 hybrid tube amp with USB DAC.
Paperwork has never sounded so good!
You do the math. 🙂
Meanwhile, on the other bench, one meant specifically for pushing paper, I just cleaned up a room used for storage for past 3 years and turned it into a paper pushing bench, complete with Vanguard speakers and a T9 hybrid tube amp with USB DAC.
Paperwork has never sounded so good!
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180Vpp is 63.6Vrms. That’s 809Wrms into 5ohms.
That’s an HP 12c - I think they are still made today. One of the longest running and best selling products from HP (continuous production since 1981). Although now it’s made in China of course. The keyboard still feels fantastic like the old ones.
On my lab bench I have an old (circa 1991) HP32Sii. That’s still my favorite scientific calc. I had to repair the rotted foam rubber cushion that presses against the flexible circuit contact that connects the keyboard buttons.
That’s an HP 12c - I think they are still made today. One of the longest running and best selling products from HP (continuous production since 1981). Although now it’s made in China of course. The keyboard still feels fantastic like the old ones.
On my lab bench I have an old (circa 1991) HP32Sii. That’s still my favorite scientific calc. I had to repair the rotted foam rubber cushion that presses against the flexible circuit contact that connects the keyboard buttons.
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my collection of working HP calculators starts with an HP45, then my favorite, an HP15C, and my daily driver, an HP50g.
I wish I bought the HP15C back in college. They are like $700 now, used.
Before grad school, I had one of those clamshell HP-28C’s. It was the first graphing calculator capable of symbolically solving equations. No computer connectivity but computers in those days were not so great. It died at some point around 1990 and so I got the HP-32Sii.
I use the equivalent app on my iphone - it’s a free clone called “Retro 15C” and made with a photograph of keyboard and even the LCD looks accurate.
Here’s a screenshot. Only works in landscape mode. I miss the tactile click on buttons. It even flips over so you can read instructions on back for programs etc.
Before grad school, I had one of those clamshell HP-28C’s. It was the first graphing calculator capable of symbolically solving equations. No computer connectivity but computers in those days were not so great. It died at some point around 1990 and so I got the HP-32Sii.
I use the equivalent app on my iphone - it’s a free clone called “Retro 15C” and made with a photograph of keyboard and even the LCD looks accurate.
Here’s a screenshot. Only works in landscape mode. I miss the tactile click on buttons. It even flips over so you can read instructions on back for programs etc.
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OTB tonight: an affordable Mechanical Keyboard, which I opened up to work on stabilisers and damping the insides of. Problem: switches soldered to the PCB is what keeps the top plate assembled to the PCB.
Of course, after I put everything back together, including the keycaps, I find out that I forgot to re-solder the spacebar switch. Another issue: too much grease on the right SHIFT key made it stick.
Had to remove all keycaps again, unscrew, open, work on it and re-test before closing it all up again.
You quickly understand why the cool kids are all playing with hot-swappable switch mecha KBs.
Once you've tried a Mecha, you don't want to touch membranes again.
Of course, after I put everything back together, including the keycaps, I find out that I forgot to re-solder the spacebar switch. Another issue: too much grease on the right SHIFT key made it stick.
Had to remove all keycaps again, unscrew, open, work on it and re-test before closing it all up again.
You quickly understand why the cool kids are all playing with hot-swappable switch mecha KBs.
Once you've tried a Mecha, you don't want to touch membranes again.
I had one key on an HP laptop go bad - the letter K. I had to buy an entire new keyboard and palmrest, trackpad and speakers (essentially the main laptop chassis) just to pull the good key from it to replace the bad one. They don’t sell single keys. It turned out that the model was just slightly different enough that the key didn’t fit. I ended up sacrificing an extra “ALT” key and renamed it “K” with a sticky label.
On the bench tonight is making a XO for the Vanguard TL. I also needed to print a binding post panel since I ran out of aluminum ones.
On the bench is AB test setup for TL with SB13PFC woofer and DC130A woofer. Each with own custom XO. Using Emerald Physics 600.2SE amp and Topping L30 preamp with iphone based ES9038 DAC.
