ok, first thing.. this might not be correct. I hope it is 
Second, zoom in using the interface (I believe you can save the fullsize images this way, if you'd like to stitch them together) and I made sure that each resistor value is readable. The only ones that might be hard are 0805 resistors that I made fit, but even those seem readable.
Still haven't found a lower profile 2-position connector (the larger ones are Molex KK) or populated the ground point between the two channels, so you'll notice this stuff is missing...
Picasa Web Albums - M - HPS
Second, zoom in using the interface (I believe you can save the fullsize images this way, if you'd like to stitch them together) and I made sure that each resistor value is readable. The only ones that might be hard are 0805 resistors that I made fit, but even those seem readable.
Still haven't found a lower profile 2-position connector (the larger ones are Molex KK) or populated the ground point between the two channels, so you'll notice this stuff is missing...
Picasa Web Albums - M - HPS
An externally hosted image should be here but it was not working when we last tested it.
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Luvdunhill. PCB looks good , but some soldered joints should have been better made. Too much solder on some transistor legs may hide dry or cold joints.
Perhaps your solder wire is too thick.
One thing which confuses me is LMH 6321 first stage buffer. According to datasheet, max. voltage for this IC is +/- 15V. In HPS 5.1 it is used with+/- 22V.
Any explanation?
Perhaps your solder wire is too thick.
One thing which confuses me is LMH 6321 first stage buffer. According to datasheet, max. voltage for this IC is +/- 15V. In HPS 5.1 it is used with+/- 22V.
Any explanation?
Indeed, I think if I were to go back I'd suck the solder off each part afterwards to try and reduce the amount of solder. I'd agree it's perhaps a bit thick for those transistors, but suitable for the rest of the parts. It's amazing how much less solder you use with SMD compared to TH.
Indeed those parts are inductors. Here's the datasheet for the part I used:
http://industrial.panasonic.com/www-data/pdf/AGA0000/AGA0000CE24.pdf
Good question about the LMH6321. Perhaps the LT1010 is a better choice, or placing a zener between each supply pin on the LMH6321?
Indeed those parts are inductors. Here's the datasheet for the part I used:
http://industrial.panasonic.com/www-data/pdf/AGA0000/AGA0000CE24.pdf
Good question about the LMH6321. Perhaps the LT1010 is a better choice, or placing a zener between each supply pin on the LMH6321?
Never mind mount them straight I sure as hell can't solder the resistors on without trashing them in the process. So I've stopped the build for now.
What's the chance that some kind soul with the requisite soldering ability would be prepared to take on the fine task of soldering the resistors and SMT caps onto this board for me. I'm going to end up destroying this board if i try it myself.
Happy to pay for your time etc.
What's the chance that some kind soul with the requisite soldering ability would be prepared to take on the fine task of soldering the resistors and SMT caps onto this board for me. I'm going to end up destroying this board if i try it myself.
Happy to pay for your time etc.
Thanks, the search function let me down.
Sorry to hear you are giving this one up sq...
Well both sides of mine are now constructed. i need a PSU and then we can take some accurate measurements.
Does anyone have know of a pcb for the PSU which I can fit two PCB mount toroids on?
On start up there are some horrible transients on the outputs for about the first 20 seconds; after this some low level, low frequency oscillation still happens but it settles down.
Has anyone else experienced this, I wouldnt want it connected to the amp with this!
Has anyone else experienced this, I wouldnt want it connected to the amp with this!
