Yes, I was just wondering if we'd need to add or perhaps subtract from the large price if arranging the speaker properly. 🙂 No idea. I just know that they're easy to carry, quite expensive and I'm not going to buy one. But I think there's a steam-punk-able suitcase up in the attic, with the main difference that I have WinISD, some foam seal, and some brace boards. 😀
I changed the design slightly, as i want to cover the drivers with mesh. Will this work? Jacks qubinator by Jack - 3D Warehouse
I have a sheet of 14mm mahogany ply, will this be fine, or is it too thick? The only downside i can see with added thickness is weight?
An externally hosted image should be here but it was not working when we last tested it.
Started the Qubinator project today 🙂
I have chosen to use 4mm marine okoume veneer for the center pieces, instead of 3mm masonite, because i happened to have a sheet lying around.
I also have a 14mm sheet of okoume lying around, so i might make the rest of the cabinet out of this, and route some circles down to 9mm, thus getting more strength without it weighing much more.
What type of fuse will i need with this design?
Conveniently, the output power range is similar to a car radio, so you could get fuses and fuse holders at the auto parts store.
I am envious of your car radio.
15a is too much for TA2020. A more realistic range would be 3a to 5a.
We know that 1a isn't enough. We know that some TA2020 boards come equipped with a 3a schottky series to the v+, and thereby we know the current demand isn't a lot more than 3a. However, if inrush from charging the board's capacitors blows a 3a fuse, you'd need to step up to a 5a fuse to prevent nuisance fuse blowing.
Details
The battery doesn't automatically limit capacitor charging speed like a transformer could do and thus the inrush on battery power, at switch-on, is a brutally fast charge of the amplifier's capacitors, so it may take some experimentation to find an appropriate fuse value. Try smallest value fuses first and only step up to larger figures when necessary.
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I have an additional concern for TA2024. It has a more limited voltage range. Unlike TA2020 and TA2021 (available economically from Muse), the TA2024 is prone to blowing out if it delivers significant speaker current while also operating at voltages beyond 13.8vdc.
Charger Controller Regulator I bought one of those battery chargers. It needs a DC input. I used a laptop power pack. Under the cover of the charger is a trimmer so that you can adjust the voltage not to exceed safe voltage for the amplifier. Like almost every battery charger on earth, in factory condition it wanted to go well beyond 13.8vdc; however, I turned the dial to lower the voltage. 😀
Probably a better alternative would have been a TA2021 or TA2020 that can withstand ordinary automotive voltage ranges.
Charger Controller Regulator I bought one of those battery chargers. It needs a DC input. I used a laptop power pack. Under the cover of the charger is a trimmer so that you can adjust the voltage not to exceed safe voltage for the amplifier. Like almost every battery charger on earth, in factory condition it wanted to go well beyond 13.8vdc; however, I turned the dial to lower the voltage. 😀
Probably a better alternative would have been a TA2021 or TA2020 that can withstand ordinary automotive voltage ranges.
That's no standard battery. What specialty batteries have this convenient optional circuit included?
Any cheap ebay 12V CCTV battery pack has that as standard.
Just note that they are roughly 65% of specified capacity for this use. And that voltage is 11.7V nominal, and 12.6V absolute maximum voltage.
Just one example but there are hundreds
DC 12V 9800mAh Li-ion Super Rechargeable Battery Batterie AKKU Pack For CCTV Cam | eBay
Yup, I tore my eBay battery apart and true enough, it consist of 6 cells in a 3 x 2 configuration for 11.1V ~6200 mAh. However, they are Lithium-ion Polymer pouch cells.
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