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Old 1st August 2004, 08:15 AM   #1
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Default Aleph Ono Pics

Here are my Pics from my Aleph Ono. The PCBs are from PQuadrat (see Thread Aleph Ono Project (from PCB group buy))

The Case is a 19" Case from the German vendor "Fischerelektronik" .
The toroidal power supply is from thel-audio.
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Old 1st August 2004, 08:19 AM   #2
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Default Aleph Ono Pics

Here is a better picture from the Power-Supply PCB. The Electroylytic Caps are Panasonic FC and the big blue foil caps are from Epcos MKT.
The internal cable wire is from Kimber 8TC
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Old 1st August 2004, 08:20 AM   #3
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Nice job.

How does it sound?
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Old 1st August 2004, 08:24 AM   #4
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Default RE: Aleph Ono Pics

Here are some better pics from the main PCBs. The green foil caps are WIMA FKP2, the brown caps are SIMICs. The red ones are WIMA MKS02 foil caps. the big elco caps and big blue foil caps are the same as on the power supply PCB. The small purple elco cap are from sanyo oscon SG.
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Old 1st August 2004, 08:48 AM   #5
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Default RE: Alpeh Ono Pic (Sound)

How does it sound? [/B][/QUOTE]


Well i am very satisfied with the sound. My turnable is a rega p3/2000. My preamp a rotel rsp-1066 and poweramp rotel RMB1075. My speakers are B&W 805N + B&W ASW2500 Subwoofer. I have heard Peter Gabriel "So" and Roxy Musik "Flesh and blood" for example. Both are 180g audiophil vinyls. The Rythmics and percussion (especially from the roxy music parts) are exellent. I also like the good separation of different instruments and the soundstage in deepth and wide. I have only a MM-System but i hope i can visit someone in the near future which has a MC-System on his rega turnable. He has also build the Aleph Ono and i have asked him for measurements on pcb-Power-Supply due to ripple measurements. I have also noticed that IMHO the Ono needs some time (nearby 30 minutes) to work 100%. In the beginning when you fresh switched the ono on i think the soundstage is a little less and also the instrumentation separation is slightly less. The difference is not big but i would say noticable.
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Old 1st August 2004, 09:01 AM   #6
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Any improvement with thermoglue ?
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Old 4th August 2004, 05:40 AM   #7
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Default RE: Alpeh Ono Pics

Quote:
Originally posted by Upupa Epops
Any improvement with thermoglue ?
I have just tried them but i would say it was only marginally with or
without the thermoglue. So you could leave them or not.
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Old 4th August 2004, 04:53 PM   #8
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Did you have to make any modifications to the boards/circuit? I have a set of boards waiting on my stack.
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Old 5th August 2004, 05:32 AM   #9
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Default RE: Ono Pics

Quote:
Originally posted by roddyama
Did you have to make any modifications to the boards/circuit? I have a set of boards waiting on my stack.
No expecpt the error correction on the Power Supply PCB from the Use PQuadrat. He has postet self the corrections. The circuit is very similary to the original-circuit.
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Old 8th August 2004, 08:04 PM   #10
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Quote:
Originally posted by roddyama
Did you have to make any modifications to the boards/circuit? I have a set of boards waiting on my stack.

Hi Rodd,
I build my ONO with the same boards and did make a few changes. It worked fine as is, but I liked it better after I modified the design a bit. Here's a link describing my modifications:
http://diyaudio.com/forums/showthrea...threadid=27318

Here's a link showing my ONO in final form:
http://diyaudio.com/forums/showthrea...197#post355197

And one last tip - I had really good results using a Teflon cap in the 0.01uf spot in the RIAA feedback network. It seemed to make the biggest difference there.

---Gary
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