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"The Wiener" TPA3118 amplifier, group buy #3 + "Wiener Pro" prototypes.

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#22
Anyway, getting the order/interest list going. Quote the most recent post and add your name to it if you want something.

loafimus: 4 x bare PBTL PCB + 4 x microcontroller
ChuckT: fully assembled stereo Wiener + fully assembled Pro
DawgNo1: 2x stereo 3118 fully built.
jonners: 1x stereo fully assembled Pro
 
#24
Anyway, getting the order/interest list going. Quote the most recent post and add your name to it if you want something.

loafimus: 4 x bare PBTL PCB + 4 x microcontroller
ChuckT: fully assembled stereo Wiener + fully assembled Pro
DawgNo1: 2x stereo 3118 fully built.
jonners: 1x stereo fully assembled Pro
Pyjamas Before Chris: 1x stereo fully assembled Pro
 
#25
Hi, I am arranging a group buy in my area and I have 12 assembled tpa3118 and 3 Pro assembled so far. I will confirm the details later.
If we don't order the filter kit, we can specify the load impedance put on the board, is that correct?
 
#27
ChuckT said:
Hi, I am arranging a group buy in my area and I have 12 assembled tpa3118 and 3 Pro assembled so far. I will confirm the details later.
If we don't order the filter kit, we can specify the load impedance put on the board, is that correct?
Click to expand...
Nice... that's a big order. Mind the comment in the first post though, the Wiener Pro is an experimental prototype and there's a chance the first crack at the hardware won't work 🙂 I guarantee you'll get a working board if you pay for one, but there might be delays.

Generally I install the provided load impedance (4/6/8/whatever) on a fully built board when I build and test it. And if you order a filter kit, I include the other inductors/capacitors that are needed need to change it to any of the other load impedances.

In theory I could test the card, desolder the output filter and let the end user stuff in the parts that they choose...
 
#28
adn6244 said:
Hi,
May i know what is the output power into 8 ohm for both the pbtl and stereo amp?
Also can it be powered by the $20+ abletec smps ?

Thanks.
Click to expand...
Output power depends on the power supply voltage.

12V supply: 30W peak/15W RMS sine into a 4 ohm load. 15W/7.5W into 8 ohms.
24V supply: 120W peak/60W RMS into 4 ohms, 60W/30W into 8 ohms.

Got a link to the Abletec supply?
 
#35
Anyway, getting the order/interest list going. Quote the most recent post and add your name to it if you want something.

loafimus: 4 x bare PBTL PCB + 4 x microcontroller
ChuckT: fully assembled stereo Wiener + fully assembled Pro
DawgNo1: 2x stereo 3118 fully built.
jonners: 1x stereo fully assembled Pro
Pyjamas Before Chris: 1x stereo fully assembled Pro
wushuliu: 1 Pair Assembled PBTL MINUS CONNECTORS - 4 ohm
 
#36
wushuliu said:
Anyway, getting the order/interest list going. Quote the most recent post and add your name to it if you want something.

loafimus: 4 x bare PBTL PCB + 4 x microcontroller
ChuckT: fully assembled stereo Wiener + fully assembled Pro
DawgNo1: 2x stereo 3118 fully built.
jonners: 1x stereo fully assembled Pro
Pyjamas Before Chris: 1x stereo fully assembled Pro
wushuliu: 1 Pair Assembled PBTL MINUS CONNECTORS - 4 ohm
Click to expand...
hepmusic 1 stereo 3118 8 ohm fully assembled
 
#39
Pyjamas Before Chris said:
Hi Garry,

I would be interested in your recommended PSU pairing if you have one. Does the PSU quality impact performance much?
Click to expand...

I use a "TP3005T" linear adjustable supply, branded "tekpower", purchased off amazon for about $90US, set to 19V constant voltage mode. Tried at least 6 diff PSUs, linear and smps, and this offered by far the best sound. I did the testing on my SMSL 3116 amp, but it shoud be just as valid for the wiener, and its playing very well with my new stereo board. the brick that came w/ my asus laptop (19v/6.5a) sounds nice too, but not nearly as good.
Power question: is the ammeter on my PSU a good indication of the power the amp is putting out? Normally its under 100mA@19V, so 1.9W for normal listening volume? Very loud would be maybe 2x that, or maybe 3-4x at the most. I know there is some other stuff at work-- instantaneous power for transients or whatever, but watts in should = watts out right?
 
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#40
bk856er said:
Why no Coilcraft love for the Pro? With a name like that...

BK
Click to expand...
The 1D17A and VER2923 actually have near identical saturation currents:

http://www.icecomponents.com/images/document/PDF/1D17A.pdf
Typical Current vs Frequency - VER2923 Series Power Inductors

The 1D17A doesn't have the same DC current handling capability as the VER2923, but it's still more than adequate - you'll need to run the WP at 36V rails and output a continuous clipped sine wave into a 4 ohm load to overheat them, chances are you'll trip the thermal protection on the TPA3250 chip first.

The 1D17A also let me shrink the board size a fair bit.

I contemplated changing the PBTL Wiener over to 1D17A's, but decided to leave that "deliciously overkill" design alone 🙂
 
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