AudioSector-chip amp kits, dacs, chassis

[Peter Daniel]

Yes, you can use 3,300uF caps.

Zobel components (0.1uF and 2R7) are optional and I never use them with my amps. In case you don't use them, DO NOT install jumpers in their place, that would short the output to the ground.

The rectifiers don't require heatsinks, in case of using shared heatsink (like a bar for instance), make sure that each diode is isolated from a heatsink.

 

[safetyman]

Peter, thanks for your replies. I guess now all I need will be the transformers, the 3300uf caps, heatsinks and to build my enclosures and I am on my way. I am getting close.

After this I'll be able to compare it to the LM3886 GC I made from a Chinese board. Very excited to hear how it's going to sound.

 

[karma]

Looks good. I'm also working on a new PS enclosure for Patek amp, will post some pics soon.

cool

 

[Destroyer OS]

Will a Sola E350E work with 3875? Also even if it will work how will the performance be? I would never choose to use one that will not compete with the rest, not when I am using the best parts I can short of pure silver.

 

[safetyman]

Peter, if I were to place the transformer in a separate casing, should I include the rectifier boards there and bring DC into the amp case or should I keep the rectifier boards in the amp case too and just leave the transformers on the outside?

 

[Peter Daniel]

It is better to include the rectifier boards with the transformer and bring DC into the amp case

Will a Sola E350E work with 3875?

I'm not familiar with Sola products, but as long as it provides proper voltage I don't see a reason not to try it.

 

[Peter Daniel]

There was slight delay recently with processing Premium kit orders. A shipment of parts (to me) has been hold by customs for 2 weeks.

Presently, all outstanding orders that were placed before 3PM today, have been shipped. It also applies to Aleph 30 boards, mentioned here: http://www.diyaudio.com/forums/showthread.php?postid=815810#post815810

 

[steenoe]

Peter, after reading a few miles of this thread, I have to conclude this: You are the most patient and tolerant DIY'er on this board Pretty amazing Respect

Steen

 

[Destroyer OS]

https://www.rselectronics.com/Catalog/ViewPart.aspx?Part=E350E&MFG=SOL

Do they have to be torodial?

 

[karma]

peter with the Aleph 30 is one pcb two channel or one channel?

 

[-=Zepplock=-]

kit?

i went thru 30 pages out of 76 and couldn't find any pricing on nos DAC kit. What versions are available?

I would also like to use optical input instead of the one used in the kit.

What changes should I make and how would this affect the price?

Thank you Peter.

 

[Sangram]

Post #172, 165 and 169 have the info you need

 

[hifimaker]

Hi Peter,

have you thought of building a balanced output DAC for us guys with Pass Labs gear? This might be a nice DAC for the xBOSOZ.

Thanks,

-David

 

[Peter Daniel]

Yes, I'm actually thinking about implementing balanced outputs on a DAC. That would require additional DAC chip and phase reversing on data line feeding it. But it's hard to say when this becomes available.

Peter, after reading a few miles of this thread, I have to conclude this: You are the most patient and tolerant DIY'er on this board Pretty amazing Respect

Thanks Steen

 

[transducer]

For all the Canadians, there is Richard Sumner Technology
I priced out a 750va dual24v sec for $88CAN shipped for $120CAN.

Wow, that's cheap compared to Plitron! Have you tried one? I've been wanting to build a 6 channel amp for my active setup, but the cost of the transformers has been holding me back.

Cheers

 

[safetyman]

Peter, I have a basic question about how to tie together the primaries for a toroid.

My 300VA toroids for your LM4780 arrived today. The primaries are 115-0, 115-0 and the secondaries are 25-0, 25-0. Our voltage is 230volts, so does that mean I have to tie the 115 from one group to the 0 of the other group, and do the same for both, then connect my supply from the wall to them?

 

[Peter Daniel]

Here's a schematic supplied by Plitron, you should be able to figure out the connections for your transformers from that as well.

You should observe proper phase on the wires (marked with a dot on Plitron drawing)

 

[safetyman]

Thanks Peter. Just to reconfirm, I have to tie the white 115 to the brown 0, and apply voltage to the black and orange? Sorry, I am not good at this. My torroid cables are of different color coding but I believe they correspond to the above.

 

[Peter Daniel]

There are two primaries on each transformer with ends marked 0 and 115. You connect them in series (115 connects with 0). The primaries of both transformers configured in such way are then connected in parallel and plug into 230V outlet.

 

[safetyman]

Peter, this is what I did, and the results I got. Please comment:

Blu (0v) . -----||------. Blk (0)


Grey (115v) ------||------ (25v) Red


Vio (0v). ------||------. Orange (0)


Brn (115v) ------|| ------(25v) Yellow


I tied Grey and Vio together and applied Live 240V to Brn and Neutral to Blu. I measured the primaries and they were giving 28.5V across Red/Blk and the same for Yellow / orange. Is this voltage too high for the LM4780 and did I wire it propperly?

Appreciate your reply b4 it is actually attached to the PSU and amp boards.

Regards.