I tested all the solder joints on both boards using the DMM. Can't find any bad joints. Maybe I should reheat them all to be sure.
I've built 3 boards. The first one had some wrong parts. The 2nd and 3rd both progressed thru the initial test [LEDs on, 10R ~ 0 DCV.] On the second round to bias to 15-20mV both had issues. I wish I'd kept better notes. It might be that -V went wonky of both of them, but I can't be sure. But it's the -V LED is clearly out on the 3rd board.
I've built 3 boards. The first one had some wrong parts. The 2nd and 3rd both progressed thru the initial test [LEDs on, 10R ~ 0 DCV.] On the second round to bias to 15-20mV both had issues. I wish I'd kept better notes. It might be that -V went wonky of both of them, but I can't be sure. But it's the -V LED is clearly out on the 3rd board.
Attachments
Use the largest tip you can get away with for better heat-transfer too - very fine points are rarely needed unless soldering individual wires to SMT chips (which can be avoided by using reflow oven, again recommended!)
[ Of course I realize that one person's fine point is another's large point! ]
[ Of course I realize that one person's fine point is another's large point! ]
- Home
- Amplifiers
- Solid State
- diyAB Amp The "Honey Badger" build thread