Twisted pair of 23g silver takes its place in C1 position. I don't have any bi-polar electrolytic caps so that will have to wait.
Temp on heatsinks ( 45°C ) run 10°C cooler.
Temp on heatsinks ( 45°C ) run 10°C cooler.
You should crank that thing up... a bit...
I run my Aleph J at 0.5V drop across those 0.47 ohm / 3W resistors. I noticed an improvement in sound going from the usual 0.4 V bias to 0.5V. The 5U heatsinks are very hot, but the sound is very nice 🙂
That's 25W of dissipation across each MOSFET... (my rails are exactly 24V loaded). The 5U case seems to be adequate to dissipate all that heat... only just 😱
I have wondered where Nick gets his silver ribbons....it looks like he DIYs them!!
That one is the pinnacle of interconnects...a silver bullet, as I call it.... single peace, pure annealed silver, no soldering. Very fast, faster than a speed of light 🙂
I'm glad you like it!
And I've ordered a few pairs of bipolar 100uf caps for the PS.
I just may twist that dial just a bit.
I've been wondering about this myself, adding some high quality caps right at the terminals of the amp board. 100-200uF between +/- and ground. May have been ExtremeBoky that tried black gates across the block leaving the PS board. Eager to hear others thoughts on these supplemental high quality caps.
This may not be the best thread for your question.
Perhaps this one...
Aleph J illustrated build guide
In addition to your question, I'd suggest posting the make and model of transformer you're using along with your mains voltage for verification.
Perhaps this one...
Aleph J illustrated build guide
In addition to your question, I'd suggest posting the make and model of transformer you're using along with your mains voltage for verification.
You can add heatsink compound between the 2 heatsinks and also where it adheres to the front panel, if your chassis is the 5U/400mm Modushop type. And use Ceramic insulators instead of Keratherm from MOSFET to heatsink if you like.
Best,
Anand.
Poseidon,
When using the ceramic insulators are you polishing the back of the mosfet and/or using compound between the back/insulator and then insulator to sink?
When using the ceramic insulators are you polishing the back of the mosfet and/or using compound between the back/insulator and then insulator to sink?
Thanks! Is this a good solution? I have already tried but removed the thermistor because it got very hot.
It is supposed to get very hot.
When you turn the amplifier on, it is cold (room temperature) with a resistance of around 10 ohms. It acts as a resistor, and it limits the in-rush current.
As the current starts running through, it gets quite hot very quickly, and its resistance drops to around 1 ohm (or lower). It will continue to run hot (and keep its resistance low) - this is a normal operation, don't worry about it. Just give it a bit of space to "breathe".
When you turn the amplifier on, it is cold (room temperature) with a resistance of around 10 ohms. It acts as a resistor, and it limits the in-rush current.
As the current starts running through, it gets quite hot very quickly, and its resistance drops to around 1 ohm (or lower). It will continue to run hot (and keep its resistance low) - this is a normal operation, don't worry about it. Just give it a bit of space to "breathe".