Neurochrome Parallel-86 Group Buy

tomchr · 06:54 AM

UPDATE September 4th, 2016: All boards have sold. Group buy closed. Thanks to all who supported the project and the group buy.

With TI's decision to discontinue the LM4780 used in the Parallel-86, I decided to let the Parallel-86 project sunset. However, there seems to be a fair number of folks who have LM4780s sitting in their desk drawers and there is certainly some interest in keeping the project going.

If the interest is there, I will be happy to order more boards. I would like to try and gauge the interest before I commit to this last, final, (yes really) ultimate board order of Parallel-86 boards.

If you are interested in buying Parallel-86 boards and can put money down by, say, July 21st please reply with the number of boards that you would like to buy. The boards are $90/each.

You can find the project information here: Parallel-86: High-power composite amplifier achieving 0.00012 % THD.

Thanks,

Tom

Halauhula · 7th July 2016, 11:05 PM

I am interested in 2 boards.

AR2 · 7th July 2016, 11:33 PM

I have to check how many chips I have, but I am sure I will need 4 boards. One board is for one channel - right?

tomchr · 12:10 AM

One board per mono channel, yes.

I'm looking at my summer schedule. I'll be in and out of email coverage in the middle of August, so I pulled the commit date in a bit.

The minimum board order is 12 boards, so once we reach that magic number of interested buyers, I'll open up for pre-orders on my website.

Tom

Halauhula · 8th July 2016, 02:42 AM

Quote:

Originally Posted by Halauhula

I am interested in 2 boards.

I did not read all the way to the end, to where Tom indicated that he would have a higher power board available. I am going to await that; so please ignore my expression of interest for two boards. I am very sorry.

Geary

tomchr · 8th July 2016, 03:21 AM

No worries.

Tom

arthur · 8th July 2016, 05:25 AM

I book for 2 boards

erik777 · 8th July 2016, 06:54 AM

I have these left over from my build on the Parallel-86
You will need all 3 these components per pcb.
Brand new from mouser. PM if interested

1 pc -LM49710 $2

1 pc -OPA2277PA $4

1 pc- LM4780 $11

Shipping USA/CANADA $6

Total $23 US paypal

tomchr · 12th July 2016, 04:32 PM

Well, so far we have interest in six boards. The minimum order is 12 boards. We need a couple more guys to sign up.

Tom

sq225917 · 12th July 2016, 11:25 PM

Farnell UK have 300 chips in stock for immediate delivery. Just in case that was putting anyone off.

7th July 2016, 06:07 PM	#1
tomchr diyAudio Member Join Date: Feb 2009 Location: Calgary	Neurochrome Parallel-86 Group Buy UPDATE September 4th, 2016: All boards have sold. Group buy closed. Thanks to all who supported the project and the group buy. With TI's decision to discontinue the LM4780 used in the Parallel-86, I decided to let the Parallel-86 project sunset. However, there seems to be a fair number of folks who have LM4780s sitting in their desk drawers and there is certainly some interest in keeping the project going. If the interest is there, I will be happy to order more boards. I would like to try and gauge the interest before I commit to this last, final, (yes really) ultimate board order of Parallel-86 boards. If you are interested in buying Parallel-86 boards and can put money down by, say, July 21st please reply with the number of boards that you would like to buy. The boards are $90/each. You can find the project information here: Parallel-86: High-power composite amplifier achieving 0.00012 % THD. Thanks, Tom __________________ Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886. Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right Last edited by tomchr; 5th September 2016 at 06:54 AM. Reason: Boards received

7th July 2016, 11:33 PM	#3
AR2 Master Burner Join Date: Dec 2002 Location: San Francisco, California	I have to check how many chips I have, but I am sure I will need 4 boards. One board is for one channel - right? __________________ www.burningamp.com

7th July 2016, 11:41 PM	#4
tomchr diyAudio Member Join Date: Feb 2009 Location: Calgary	One board per mono channel, yes. I'm looking at my summer schedule. I'll be in and out of email coverage in the middle of August, so I pulled the commit date in a bit. The minimum board order is 12 boards, so once we reach that magic number of interested buyers, I'll open up for pre-orders on my website. Tom __________________ Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886. Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right Last edited by tomchr; 8th July 2016 at 12:10 AM.

8th July 2016, 03:21 AM	#6
tomchr diyAudio Member Join Date: Feb 2009 Location: Calgary	No worries. Tom __________________ Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886. Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right

12th July 2016, 04:32 PM	#9
tomchr diyAudio Member Join Date: Feb 2009 Location: Calgary	Well, so far we have interest in six boards. The minimum order is 12 boards. We need a couple more guys to sign up. Tom __________________ Modulus-86, 186, 286, & 686: 40-240W (8Ω), <-120dB THD. HP-2 Headphone Amp: 660mW, <-130dB THD. Taming the LM3886. Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right


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7th July 2016, 11:05 PM	#2
Halauhula diyAudio Member Join Date: Feb 2014 Location: Bethesda MD	I am interested in 2 boards.

8th July 2016, 05:25 AM	#7
arthur diyAudio Member Join Date: Oct 2001 Location: .	I book for 2 boards

8th July 2016, 06:54 AM	#8
erik777 diyAudio Member Join Date: Sep 2014	I have these left over from my build on the Parallel-86 You will need all 3 these components per pcb. Brand new from mouser. PM if interested 1 pc -LM49710 $2 1 pc -OPA2277PA $4 1 pc- LM4780 $11 Shipping USA/CANADA $6 Total $23 US paypal

12th July 2016, 11:25 PM	#10
sq225917 diyAudio Member Join Date: Jun 2004 Location: sheffield	Farnell UK have 300 chips in stock for immediate delivery. Just in case that was putting anyone off.

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