New Aleph Mini PCB GB

[jleaman]

Originally posted by winslow
I'd need some help with SMD...not to that point soldering.

I thought the through hole boards were nice, and very easy to assemble...

i'd offer it to people as a option

[rick57]

Any thoughts on how many watts the 10 (or the 30 watter) would produce into a 16 ohm driver (obvously not ideal) - a straight 50 %: i.e. 5 or 15 watts?

How could the PS be done, to reduce the “drop”?

Thanks

[pinkmouse]

Jason, can you start a new thread on this PCB please.

[winslow]

Thanks J. That would be cool, and while I might have to take you up on the option, it sure would take some of the fun away from building the amps.

God, I must be insane saying that soldering an amp kit is fun...lol.

[jleaman]

Link and post made

http://www.diyaudio.com/forums/showt...585#post819585

[pinkmouse]

Thanks mate. It just keeps things a bit more organised for newcomers, y'know.

[SteveA]

Measurement question

Sorry, don't mean to hijack thread but.....
I bought 4 sets of the Mini/A30 boards from BrianGT. I stuffed one set as Mini's and three sets as Aleph 30's. I finished an A5 about a year ago where I learned (courtesy BDP) how to make the voltage measurements prior to installing the output boards/devices.

On all eight boards I see the ~9V drop across Z5, ~4.1Vgs on Q3, ~3.9Vgs on Q1,Q2. On seven boards I see ~4V drop across the 392R resistor (R18), the last board (an A30) I measure a drop of ~2.7V. Seven of the boards would seem to be good to go. Is this 2.7 V too low (ie, do I need to chase down the offending part(s))?

This resistor "sits" between the -V supply and the drain of Q2 and would seem to define the voltage drop across that resistor (I measured 2.7 volts between these points as well). What would cause the drain to be 1.3-2.3V too negative (Is Q2 the problem?)?

Thanks,
SteveA

[chipco3434]

Progress...

This is the bottom of chassis for my Mini/30 4 channel

Ya baby!

[chipco3434]

and another...

[chipco3434]

the whole thing...