i'm doing nothing of the sort, i'm saying to LIST the PCB and PARTS separately. it has nothing at all to do with the price, the price is exactly the same as listed, it just means that owen has the 2 numbers he needs separately and unambiguously without having to comb the thread so much, if someone asks for 4 x pcb and 2 x parts kits, they get charged for 2 full kits and 2 pcbs. its supposed to take one step out of the equation, as its exactly what opc would have to do as the first thing before making the order
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No, one stereo set for a friend.
I plan to use two sets for stereo bass amplification up to 200 Hz, and two sets for stereo amplification over 200Hz in a threeway open baffle loudspeaker.
Actually I will bias the mid-high amplifiers in pure class A with some 10 watts of output power using the single die Alfet output fets and the appropriate power supply voltages.
wow good numbers. Considered running it full bridge and using a output tracking buck supply for each output stage?
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 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
73x pcbs
28x parts kits
__________________
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 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
73x pcbs
28x parts kits
__________________
CeeVee (and others),
Nice that you help counting, but already in post #42 I corrected (6xPCB-6xparts).
By the way Owen's own list in post #50 is correct.
Nice that you help counting, but already in post #42 I corrected (6xPCB-6xparts).
By the way Owen's own list in post #50 is correct.
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 and 2 x parts kits
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
73x pcbs
30x parts kits
I hope it is ok, I have updated list to reflect my upgrade to full kit.
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 and 2 x parts kits
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
73x pcbs
30x parts kits
I hope it is ok, I have updated list to reflect my upgrade to full kit.
Owen a change to my order
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 and 2 x parts kits
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
change 4 pcb to
4 pcb and
4 parts kits
total now
73 x pcb
34 parts kits
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 and 2 x parts kits
Spacehead 2 x pcb only
multisync 4 x pcb only
QRikard 2x kits 4x PCB
AKN 2 PCB and 2 part kits
jtktam 12 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
glt 2x PCB + 2x parts kit
amc 2x PCB + 2x parts kit
CeeVee 2x PCB + 2x parts kit
____________________
change 4 pcb to
4 pcb and
4 parts kits
total now
73 x pcb
34 parts kits
OMG,
Anyone a suggestion how I could change "pieter t: 0x PCB (?), 6x parts kit" into "pieter t: 6x PCB, 6x parts kit"?
Once more counting guys: please read post #42!!!!
Anyone a suggestion how I could change "pieter t: 0x PCB (?), 6x parts kit" into "pieter t: 6x PCB, 6x parts kit"?
Once more counting guys: please read post #42!!!!
Why? The parts kit already includes the PCB - separating it out here only makes for confusion.
OK OK PLEASE NO MORE!!!
From now on, no more list. Just copy and paste the following with your numbers:
I Want:
"insert number here" - PCB's without part kits.
"insert number here" - Full kits which include the PCB.
Take a look at the list, and post something here if it's incorrect. If it's correct, then don't worry about it!
The list was helpful at the start, but now people just seem to be confused.
Please follow the above request.
Cheers,
Owen
From now on, no more list. Just copy and paste the following with your numbers:
I Want:
"insert number here" - PCB's without part kits.
"insert number here" - Full kits which include the PCB.
Take a look at the list, and post something here if it's incorrect. If it's correct, then don't worry about it!
The list was helpful at the start, but now people just seem to be confused.
Please follow the above request.
Cheers,
Owen
Technical Q&A time:
The Saint:
Very good catch on that! I owe you one. It turns out if you fix a problem twice, you probably didn't fix it.
I had forced a pin swap in the layout to accomodate the lateral fets, then before I posted the schematic I thought "having the wrong pins number is going to confuse people" so I swapped the pins around there. When I forward annotated it put me right back to the old layout for non-lateral fets
Good thing I haven't sent the boards in yet... it's still an easy fix.
Again, good catch!
454Casull:
As qusp mentioned, it really is very easy to solder 0805. It's actually faster and easier than soldering PTH once you get the hang of it. No need for fine tip irons or anything else special, it's just technique.
It makes a huge difference in layout quality and I can assure you that a good 0805 SMD resistor or cap will drastically outperform any PTH part money can buy. They're just physically closer to the ideal and you can't get around that with PTH parts.
Watch a few Youtube videos on the topic, and you'll see how easy it is. I have personally soldered 0201 parts, and I can attest to those being a little more difficult. Our lab techs can do 01005 by hand which is hard to believe considering you can hardly see the parts with the naked eye. 0805 is walk in the park, and if you can do 1206 or 1210 well, then 0805 is no harder. Again, it's all about patience and technique.
kipman725
That would be a nearly ideal setup. You'd get much better performance than Class D, and you'd get very close to the same efficiency. Making a supply that can do that isn't trivial though. If you want to do one, I'm sure there would be several here who would be interested, including myself.
FloridaBear
I haven't measured it yet, but output impedance will be very low due to the exclusion of the emitter resistors and an output filter. I'll measure that too when I get the board finished up in a few weeks.
Cheers,
Owen
The Saint:
Very good catch on that! I owe you one. It turns out if you fix a problem twice, you probably didn't fix it.
I had forced a pin swap in the layout to accomodate the lateral fets, then before I posted the schematic I thought "having the wrong pins number is going to confuse people" so I swapped the pins around there. When I forward annotated it put me right back to the old layout for non-lateral fets
Good thing I haven't sent the boards in yet... it's still an easy fix.
Again, good catch!
454Casull:
As qusp mentioned, it really is very easy to solder 0805. It's actually faster and easier than soldering PTH once you get the hang of it. No need for fine tip irons or anything else special, it's just technique.
It makes a huge difference in layout quality and I can assure you that a good 0805 SMD resistor or cap will drastically outperform any PTH part money can buy. They're just physically closer to the ideal and you can't get around that with PTH parts.
Watch a few Youtube videos on the topic, and you'll see how easy it is. I have personally soldered 0201 parts, and I can attest to those being a little more difficult. Our lab techs can do 01005 by hand which is hard to believe considering you can hardly see the parts with the naked eye. 0805 is walk in the park, and if you can do 1206 or 1210 well, then 0805 is no harder. Again, it's all about patience and technique.
kipman725
That would be a nearly ideal setup. You'd get much better performance than Class D, and you'd get very close to the same efficiency. Making a supply that can do that isn't trivial though. If you want to do one, I'm sure there would be several here who would be interested, including myself.
FloridaBear
I haven't measured it yet, but output impedance will be very low due to the exclusion of the emitter resistors and an output filter. I'll measure that too when I get the board finished up in a few weeks.
Cheers,
Owen
A bit of nitt picking Owen, but in your amp schematic drawing (post #1) the drain and source indication of the output fets is wrong (you draw the fet symbols correctly). I guess amplifier output is at the junction of the sources.
I Want:
8 - PCB's without part kits.
Owen: I have a 60v smps I'd like to use (Connexelectronic SMPS800). What's your opinion in this application?
8 - PCB's without part kits.
Owen: I have a 60v smps I'd like to use (Connexelectronic SMPS800). What's your opinion in this application?
OK, I'll take your word for it. Everything else looks fantastic, so I'd like:
2 PCB's with part kits.
Thanks!
2 PCB's with part kits.
Thanks!
pieter t:
Not nitpicking at all - that's exactly where my mistake was (and it's a bad one).
I'll be updating the schematic and the layout with the correction this evening.
HYPERTUNE
I wasn't aware that those supplies were available for such a good price! I think that would be a superb solution as it's a ready made supply. All you'd have to do is connect it directly to the amp and you'd be ready to go.
I might order a pair of those just for fun. Although for the ultimate monoblock you'd want the +/-72V 800W version and a separate linear low noise supply for the front end.
Cheers,
Owen
Not nitpicking at all - that's exactly where my mistake was (and it's a bad one).
I'll be updating the schematic and the layout with the correction this evening.
HYPERTUNE
I wasn't aware that those supplies were available for such a good price! I think that would be a superb solution as it's a ready made supply. All you'd have to do is connect it directly to the amp and you'd be ready to go.
I might order a pair of those just for fun. Although for the ultimate monoblock you'd want the +/-72V 800W version and a separate linear low noise supply for the front end.
Cheers,
Owen