Sure Electronics New Tripath Board tc2000+tp2050

[ElFishi]

I thought I share this with you:
Mean Well S145-24 with some 10mF and a 0.39 Ohm resistor in series with floating COM, picture taken at 20mV/div and 5us/div compared to COM tied to GND, at 5mV/div and 5us/div.

And I can hear this with a B1 buffer in front of the amp.

[soldersmoker]

Originally Posted by swkbkk

I haven't suffered from electricity shocks in my time in this room, but I am just wondering whether not having a proper grounding on the mains can cause some problems to the amplifier. I would appreciate any comments on this.

Yes, you're right, hot and neutral are the two wires that's powering your gear. The third ground wire is purely a safety feature. If you have a fault that creates a short in your equipment, you would a have dangerous situation. Nothing to do with equipment performance, everything to do with not getting electrocuted.

[soldersmoker]

Originally Posted by ElFishi

I thought I share this with you:
Mean Well S145-24 with some 10mF and a 0.39 Ohm resistor in series with floating COM, picture taken at 20mV/div and 5us/div compared to COM tied to GND, at 5mV/div and 5us/div.

And I can hear this with a B1 buffer in front of the amp.

A few people earlier in this thread were bad-mouthing using battery power. After seeing this, I wonder. I was using a battery to power the updated SI amp, and the improvement in sound was dramatic. Right now I'm using a 15V 20A linear P.S. favored by ham radio operators. It has a low level mechanical hum in the transformer that drives me crazy when the ambient noise level in my room is very low. Back to the battery, methinks.

[Mark Allen]

Now you see the same road that I am on. I am truly surprised that there is no consensus or recommendation for class D coils.

Exactly! I think most here are missing the boat to be honest. Those coils and the Zobel are probably going to make the biggest difference sound wise o0n any class D amp. The input cap on this amp as well. Other then that small mods can be done that most here probably couldn't tell any difference or not. You still need an unmodified amp to compare any mods done too!!

Mark

[wushuliu]

Originally Posted by Mark Allen

Exactly! I think most here are missing the boat to be honest. Those coils and the Zobel are probably going to make the biggest difference sound wise o0n any class D amp. The input cap on this amp as well. Other then that small mods can be done that most here probably couldn't tell any difference or not. You still need an unmodified amp to compare any mods done too!!

Mark

The 41hz forum has a lot of discussions about toroids and inductors. Doesn't seem like any one type stands out but MPP is mentioned as a possible step up...

[wushuliu]

So is everyone using the Low Gain setting? And what's the difference between the two Medium settings?

[sendler]

Originally Posted by ElFishi

I thought I share this with you:
Mean Well S145-24 with some 10mF and a 0.39 Ohm resistor in series with floating COM, picture taken at 20mV/div and 5us/div compared to COM tied to GND, at 5mV/div and 5us/div.

And I can hear this with a B1 buffer in front of the amp.

.
When operating at their best, The MeanWell power supplies paint a pretty picture. I don't think a battery would look much better than your second screenshot.

[DJK265]

Hi All,
I've been following this thread and I'm very intrigued by the "Sure" boards. I purchased the 2* 100w board which I received yesterday and plan on doing some mods as time permits. My question is could you use an adjustable DC-DC up convert on the power supply? I have a 27vdc/13ah smps coming and I'm wondering if this is possible. Also the o/p inductors on my board are marked DR127-220, when googled I find they're made by "Coiltronics" a division of Cooper/Bussman and are available at Digi-Key. Here's some specs. INDUCTOR SHIELD PWR 22UH SMD - DR127-220-R
My board also has a fan on the H/S and I received a free fan also. This should be a fun project. Good luck to all on your mods and thanks much to all that have given such great advice on how to get the most out of this board.

Dan

[sendler]

The new 14ga. air core toroids are playing and they sound better than the previous 20ga. cylindrical air cores which were already intriguing me. The toroids do exhibit much better EMI containment although not quite as good as the T106-2 cores which also leak a little more noise than the original little shielded bobbins. Long story short. This is the best sounding amp I have ever had home. Explosive dynamics with see through detail in a jet black background. And it runs off of a single $32.00 supply. I am now a true believer in the Tripath technology. Too bad they went out of business. Next up, some 14ga. Litz wire.
.

[wushuliu]

Originally Posted by sendler

The new 14ga. air core toroids are playing and they sound better than the previous 20ga. cylindrical air cores which were already intriguing me. The toroids do exhibit much better EMI containment although not quite as good as the T106-2 cores which also leak a little more noise than the original little shielded bobbins. Long story short. This is the best sounding amp I have ever had home. Explosive dynamics with see through detail in a jet black background. And it runs off of a single $32.00 supply. I am now a true believer in the Tripath technology. Too bad they went out of business. Next up, some 14ga. Litz wire.
.

Thanks for the update sendler. Maybe I missed a post earlier but are these self-wound or did you buy them?