"The Wire AMP" Class A/AB Power Amplifier based on the LME49830 with Lateral Mosfets - Page 4 - diyAudio
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Old 20th September 2011, 07:45 PM   #31
amc is offline amc  Canada
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amc 2 x pcb 2 x parts kit
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Old 20th September 2011, 07:49 PM   #32
pchw is offline pchw  United States
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Please cut & paste the list in post #27 and add your quantity.
This will help Owen to see the latest counts.

Thanks!!
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Old 20th September 2011, 07:50 PM   #33
opc is offline opc  Canada
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QRikard:

Because the high power is being draw by the lower supply voltage, the only real way to do it is with a transformer with dual taps. I have several here, and they're quite common.

Ideally, if people could agree on common output power, this would be a superb candidate for a group buy. We could ask for custom transformer that was say 60-50-0-50-60 @ 0.1A-7A-0-7A-0.1A with both 120 and 240V primary windings and that would work for everyone that wanted about 300W into 8 ohms.

With that setup you could run a simple full bridge rectifier with several large caps, and then run the higher voltage to the PSU board being offered in the headphone amp GB, and you'd have a nicely regulated front end supply that was 7-10V above the mosfet supply.

The above is exactly how I'll be doing it!

jtktam:

Everything is already right there... no need to punch anything in. Just decide what load you're going to be driving, decide how much power you want, and that will tell you what rail voltage to use. Then you can pick a bias current based on how much power you're willing to dissipate at idle, and that's pretty much it.

Boscoe:

Shipping overseas is no problem at all. Probably about $10 but I'll get a better estimate posted in the next few days when I know the weight.

I can measure the THD vs. power once I get a proper regulated supply for the front end, and a higher voltage rail setup for the mosfets. I'll post a THD vs power graph from 0.1W up to 300W.

As qusp said, you don't need to run separate supplies but it is strongly encouraged if you want the best performance

Cheers,
Owen
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Old 20th September 2011, 08:56 PM   #34
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It's probably irrelevant...I would like to know slew rate of this amp?
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Old 20th September 2011, 09:17 PM   #35
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qusp 4 x PCB only
L-Train 2 x parts kit and 4 x PCB
Ferrari 4 x PCB only
holminator 2 x pcb and 2 x parts kit
1543 7 x PCB only
mr Slim 2 x pcb only
Cafe Noir 4 x pcb and 2 x parts kits
dillmeister 2 x pcb only
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 6 x pcb 6 x parts kit
bada bing 2 x pcb 2 x parts kit
heinz1 2 x pcb
pchw 2 x pcb
particleman14 x2 pcb
____________________
53 x pcbs
16 x parts kits
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Old 20th September 2011, 09:57 PM   #36
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Sign me up for 6 (six) parts kits

Thanks
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Old 20th September 2011, 10:01 PM   #37
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What is the PSRR?

How organized is the parts kit going to be - all unique items to be individually labeled and/or bagged?

If you can fit D12.5 100 uF caps on the board, I would recommend the UCC EKZE101ELL101MK16S vs the Panasonic EEU-FC2A101L; 110 mOhm Z vs 150 mOhm.

Last edited by 454Casull; 20th September 2011 at 10:12 PM.
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Old 20th September 2011, 10:19 PM   #38
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Also, will you be producing boards after this first run?

qusp 4 x PCB only
L-Train 2 x parts kit and 4 x PCB
Ferrari 4 x PCB only
holminator 2 x pcb and 2 x parts kit
1543 7 x PCB only
mr Slim 2 x pcb only
Cafe Noir 4 x pcb and 2 x parts kits
dillmeister 2 x pcb only
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 6 x pcb 6 x parts kit
bada bing 2 x pcb 2 x parts kit
heinz1 2 x pcb
pchw 2 x pcb
particleman14 x2 pcb
pieter t: 0x PCB (?), 6x parts kit
454Casull 8x PCB, 0x parts kit
____________________
61 x pcbs
22 x parts kits

Last edited by 454Casull; 20th September 2011 at 10:32 PM.
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Old 20th September 2011, 10:45 PM   #39
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454Casull,

As I understand it the parts kit has also the PCB, so with 6 kits there are 6 PCB's and parts for six amplifiers.
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Old 20th September 2011, 10:57 PM   #40
qusp is offline qusp  Australia
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nope, you understand incorrectly, we are listing them separately, so there is no confusion between a kit and a kit. so list the number of pcbs and then the number of parts kits separately
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