Now we're talking! Looks good!
Just a couple small concerns. Are the outputs far enough apart? And do any power traces need to be heavier?
Just a couple small concerns. Are the outputs far enough apart? And do any power traces need to be heavier?
What is the difference between connecting the input board to the output board and connecting individual FETs to the single board? I say keep it the way it was and people can just run wires to the FETs if they need more heatsink.
You realise a single board for P- and N-channel is an option ?
e.g. add a 4th pad for the common cathode diode : solder the diode on the first three pads of one board, to last three on the other.
Again your math is well ...🙄
Mono means two chassis , not only xtra top and bottom , means 2 face plates , 2 rear plates. Price it out , it is very similar in cost to 2 stereo chassis. Separate PCB, now requires 4 PCB /Ch 8 to do stereo , you must be using the same calculators as used by current economic leaders ... 😀
To do as purpose is more costly ...........
Jacco,
Maybe, but then the inputs and outputs will end up at opposite ends of the chassis.
Andy
lets take it more spesific.Again your math is well ...🙄
Mono means two chassis , not only xtra top and bottom , means 2 face plates , 2 rear plates. Price it out , it is very similar in cost to 2 stereo chassis. Separate PCB, now requires 4 PCB /Ch 8 to do stereo , you must be using the same calculators as used by current economic leaders ... 😀
To do as purpose is more costly ...........
stereo amp:
4pc. 10x12" heatsinks
1pc. 17x12" front
2pc. 20x11" topp/bottom
1pc. 11x12" back
1 monoblock:
4pc. 10x3" heatsinks
1pc. 17x3" front
2pc. 20x11" topp/bottom
1pc. 11x3" back
2 monoblocks ARE cheeper. and can handel the same amount of power as that one stereo amp. 2pc. of monoblocks use total of 10x24" heatsinks. and 17x6" front/back.
stereoamp use total of 10x48" heatsinks and total of 17x12" front/back.
how the hell can a stereo amp be cheeper?
in either case, you need 2ch ampboard, 2 pc PSUboards and 2 pc of 800VA transformer is most likely the same(ish) price as one 1500VA.
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Looking great! The more I think about it, the more I prefer having the input and output boards separated.
Can you add some mounting holes to both boards? Also, any way you might be able to setup the PS Board to accept Fukushima MPC74 type power resistors? I'm finishing up a big GB for these resistors, and I'm about to mail out 900 of these things. I have a feeling a few members might want to use it on your PS Board.
Can you add some mounting holes to both boards? Also, any way you might be able to setup the PS Board to accept Fukushima MPC74 type power resistors? I'm finishing up a big GB for these resistors, and I'm about to mail out 900 of these things. I have a feeling a few members might want to use it on your PS Board.
and the stereo amp will need atleast twice the baseplate as the monoblocks, to spread the heat. thats not cheep.
AudioSan , you are one funny guy ... you do know you need 2 chassis for Mono Bloc's, let me fix it for you ... 🙂
Now you have 2 chassis cheaper than one .... 🙄
Yes i know, just the stupid manufacturers haven't figured that out yet and still offer stereo amplifiers in one chassis ... 🙄
Have you priced out fans .... they work ...🙂 anyway looking forward in seeing your 3 inch high mono blocs .....
Now you have 2 chassis cheaper than one .... 🙄
Yes i know, just the stupid manufacturers haven't figured that out yet and still offer stereo amplifiers in one chassis ... 🙄
Have you priced out fans .... they work ...🙂 anyway looking forward in seeing your 3 inch high mono blocs .....
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Here is the data sheet:
Fukushima Ceramic Plate Resistors MPC74
The GB was for the straight type MPC74, which looks to have a lead spacing of 9mm with 0.8mm leads.
stereo amp chassis need to be 4 times taller then 2 monoblock chassis to handle the same amount of power. so twice as mutch heatsinks. twice as big front/back as 2 mnoblocks together we are not talking about fans now. and the bigger the heatsink the thicker baseplate of the sinks. thats a fact!!
we are NOT talking about monoblocks and stereoamp of same sice!!!!!!
a 2x100W stereo class A amp most be 4 times taller then a 1x100W class A monoblock(taken the same type sinks and depth)!!
BTW: i had calculated for 2 monoblocks. find a calculator and look and the total numbers i gave you. those are for 2 monoblocks. not for one!
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The mention of Fukushima suggests the total meltdown of this beast when the cooling system fails!
San ,
I increased your numbers in my response, your original post had parts for one mono amp. The heatsinks in stereo is not necessarily 4 times the size and most if not all expressed using fans..
Even if i had monster heat sinks i would still use a temperature controlled fan for the case and i still say you cannot fit 4 boards , caps, rectifiers and transformer in a 3 inch tall case, so your numbers are off...
Jacco,
Good spot.
How is this..........
Good spot.
How is this..........
An externally hosted image should be here but it was not working when we last tested it.
What manufacturers are you talking about? I'm not aware of too many that make Class A amps. It's easier to make two separate board sets into a stereo amp than it is to do the other way.
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