The PCBs arrived at my place too.
The different shipments trickled in over various days, but now all of them should be with me...
The different shipments trickled in over various days, but now all of them should be with me...
a few tips since I built almost 10 now..
1. pre-bend all your resistors, then insert them into the board in groups so they are not in each others way, then solder them in groups so that you are not always picking up and putting down your soldering iron
2. for mosfets etc, make sure you insert them into the board in the right orientation, if you do it wrong it's a pain in the butt to take them back out without damaging the pcb
3. don't over do your solder joins, enough to fill the hole and keep the part in is good.. any more to make a mountain is just waste and might hinder performance
4. i ran a wire to the back of the chassis to ground the pcb instead of the front.. since I am waiting for the front panels
5. use the battery as a jig to solder in the battery holder.. put a bit of solder to hold the holders in place, REMOVE THE BATTERY then solder .. otherwise you will melt the battery with the heat.. also make sure the polarity is correct!
6. while the battery holder is still hot, it's easier to do all three legs at the same time.. then turn the pcb around and solder the top side for added strength.. if you wait and it cools down, it takes forever to solder because the holder becomes a giant heatsink!
7. i daisy chain 4-5 of them together and run music through them for at least 24 hours before they start to sound steady..
8. I use flux remover and a flux cleaner to get the board nice and clean.. i do it outside because it smells
-joe
1. pre-bend all your resistors, then insert them into the board in groups so they are not in each others way, then solder them in groups so that you are not always picking up and putting down your soldering iron
2. for mosfets etc, make sure you insert them into the board in the right orientation, if you do it wrong it's a pain in the butt to take them back out without damaging the pcb
3. don't over do your solder joins, enough to fill the hole and keep the part in is good.. any more to make a mountain is just waste and might hinder performance
4. i ran a wire to the back of the chassis to ground the pcb instead of the front.. since I am waiting for the front panels
5. use the battery as a jig to solder in the battery holder.. put a bit of solder to hold the holders in place, REMOVE THE BATTERY then solder .. otherwise you will melt the battery with the heat.. also make sure the polarity is correct!
6. while the battery holder is still hot, it's easier to do all three legs at the same time.. then turn the pcb around and solder the top side for added strength.. if you wait and it cools down, it takes forever to solder because the holder becomes a giant heatsink!
7. i daisy chain 4-5 of them together and run music through them for at least 24 hours before they start to sound steady..
8. I use flux remover and a flux cleaner to get the board nice and clean.. i do it outside because it smells
-joe
Good tips! As for soldering the small components such as small diodes and resistors, I usually solder those first so I can cut the leads short, and get good wetting action on the solder joints. If the larger components are soldered first, I have trouble keeping the small components staying in place.
One of the most useful tool is a panavise.. to hold the board while you solder and the more expensive ones allow you to flip the board without taking it out..
I have one that allows me to do two boards at once 🙂
-joe
I have one that allows me to do two boards at once 🙂
-joe
Received my order yesterday and the boards look great. Many thanks to ollie and studeb. Cheers.
My O2 boards arrived yesterday here in the Seattle area... fine quality PCBs! Thanks to Ollie and Studeb for their efforts.
I have all the required parts, so construction starts soon. Woo hoo!
I have all the required parts, so construction starts soon. Woo hoo!
My boards arrived today (Thanks to JTKTAM) and I'm impress withv the black silk finish. Very classy! Now with the assembling and can wait to play music on it.
Thank you to Ollie and NwAvguy for this nice accomplishement.
Thank you to Ollie and NwAvguy for this nice accomplishement.
Boards arrived today. The black looks better in person than it did in the pictures. Got a bunch of projects underway but hopefully I can get to this in between some of the more involved ones.
Thanks a lot to everyone involved with the group buy!
Thanks a lot to everyone involved with the group buy!
if anybody is interested, I have finish a few amps (still waiting for front panels) if you don't want to build your own, can buy one of mine 🙂
-joe
-joe
That would be great if it wasn't for the fact that I enjoy building my own stuff if only to know that I assembled it.
Hope my boards arrive today, my mouser and newark orders arrived just now (super fast next day delivery) and I want to get one together this week.
doing some op amp rolling these two days.. at default gain (2.5x) with the default op amp, high volume seems to have a bit of distortion
-joe
-joe
I put one together last night- here are some shots of it if anyone is interested:
O2 Headphone Amplifier - Photography by Travis Dodd
O2 Headphone Amplifier - Photography by Travis Dodd
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