"The Wire" Ultra-High Performance Headphone Amplifier - PCB's - Page 76 - diyAudio
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Old 7th October 2011, 03:34 PM   #751
qusp is offline qusp  Australia
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space for a pot is not a good idea for a gb, everyone has different favorites for such things, for instance i dont use one at all
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Old 7th October 2011, 03:47 PM   #752
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Quote:
Originally Posted by qusp View Post
space for a pot is not a good idea for a gb, everyone has different favorites for such things, for instance i dont use one at all
i see..

i wanna ask a question, is it a good implementation to put the wire as pre amp? i'm planning to combine this with my LM3875 gainclone (gain 33)
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Old 13th October 2011, 08:57 AM   #753
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Owen, I don't know whether I'm just misinterpreting somehing (or maybe I'm just plain stupid ), but shouldn't the price list for the PSU have 2 of each regulator? The schematic contains U19-22 and you list them all in the price list, but the quantities for LM317/337 is only one each.

Cheers
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Old 13th October 2011, 10:52 AM   #754
qusp is offline qusp  Australia
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Quote:
Originally Posted by idjoel2000 View Post
i see..

i wanna ask a question, is it a good implementation to put the wire as pre amp? i'm planning to combine this with my LM3875 gainclone (gain 33)
perhaps, but do you really NEED a preamp? it doesn't have any facility for multiple inputs and as written doesn't actually have any gain (although this is easily achieved)
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Old 13th October 2011, 11:16 AM   #755
NicMac is offline NicMac  Italy
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Owen,
I will let go of my boards/kits to the hungry souls on the waiting list.
To many projects and to little time.......
Cheers,
Nic
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Old 15th October 2011, 02:14 AM   #756
agdr is offline agdr  United States
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Looks like the BAL-BAL board can also make a great SE-to BAL converter by grounding one input and changing the feedback resistors to 2K.

Last edited by agdr; 15th October 2011 at 02:20 AM.
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Old 15th October 2011, 06:04 AM   #757
qusp is offline qusp  Australia
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yes, the opa1632 makes an excellent SE->BAL convertor
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Old 17th October 2011, 12:47 PM   #758
opc is offline opc  Canada
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Hi Guys,

Sorry for the lack of responses lately, it has been a pile of work getting everything together, and it was either an hour on here fielding questions, or an hour doing testing and board layout, and I know everyone is looking forward to finally getting boards and kits.

I finally have all the completed layouts to post along with finished sizes. Each image has the top and bottom layer shown, but the centre ground layer is not shown (it's pretty boring anyways). These are the finished layouts that were sent in for fabrication, so it's safe to use them for chassis selection, planning etc...

Here are the finished sizes:

BAL-BAL = 2.325" x 1.625"
SE-SE = 1.825" x 1.150"
BAL-SE = 2.325" x 1.625"
PSU = 2.525" x 1.150"

All the boards have 4 mounting points intended for #4 bolts and standoffs. On each of the boards, the holes are located 0.125" inset from each corner. The only exception is the SE-SE board which has two of the bolt holes offset by 0.2" from the edge in the x direction. It should be obvious from the images which two bolt holes are different.

I'll field the buildup of questions later today. The boards are currently in production, and I should have them early next week. I am indeed running behind, and I apologize to those who are eager to get their boards. I should be accepting payments and sending boards out shortly.

An updated list is also attached.

Cheers,
Owen
Attached Images
File Type: png BAL-BAL FINAL.png (48.3 KB, 582 views)
File Type: png SE-SE FINAL.png (37.3 KB, 588 views)
File Type: png BAL-SE FINAL.png (51.3 KB, 567 views)
File Type: png PSU FINAL.png (52.4 KB, 247 views)
Attached Files
File Type: pdf THE WIRE - SECOND RUN - UPDATE 10-17-2011.pdf (39.4 KB, 128 views)
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Old 17th October 2011, 01:23 PM   #759
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Hi Owen.

Could you change my order from 4 x PS PCB's to 4 x PS full kits please?

Is it possible to order them with the 100V caps you recommend for LME power?
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Old 17th October 2011, 01:57 PM   #760
sek is offline sek  Germany
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Quote:
Originally Posted by opc View Post
The boards are currently in production, and I should have them early next week.
Some appreciation here: great news, glad to hear you found the time!

Thanks,
Sebastian.
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