P1.7 & Ono

ARAD · 23rd July 2003, 06:55 PM

Thanks to the forum and thanks to Nelson Pass my new P1.7 is 'operational'. The pictures show the current state with an interim front and the volume control logic as per Jens Witte's design.
An 'upgrade' towards an APOX controlled P1.7 is in work.

ARAD · 23rd July 2003, 06:56 PM

and from the back

ARAD · 23rd July 2003, 07:00 PM

The Ono is based on PQuadrat's fantastic boards

jleaman · 23rd July 2003, 07:52 PM

Quote:

Originally posted by ARAD
The Ono is based on PQuadrat's fantastic boards

What is this..? A Converter..?

I like your p1.7 boards there nice.. I wish i got nice red square cap's..

Who designed the Input relay board.?

Im interested..

ThomasLMcLean · 23rd July 2003, 10:58 PM

It looks professional. A very nice job.

How does it sound?

ARAD · 24th July 2003, 06:58 AM

Jason - the Ono is the phone stage from NP, PQuadrat was willing to share his design and actually organized a group buy for the PCBs.

The boards in the P1.7 are from Kristijan (the actual preamp PCB and the two small PSUs). The backplane (input select relays), the volume relay PCB and the small logic PCB controlling the volume board are 'our' work. We designed them and Kristijan converted them to his standards and got them produced (we = group of four colleagues that are currently building Aleph5s (http://www.passdiy.com/gallery/aleph5-p5.htm), Onos and P1.7s).

The smal interim select/encoder PCBs mounted to the frontpanel are homemade and will be replaced once the APOX interface is ready.

Thomas - the preamp works very well. No background noise, no hum at all, very detailed and very controlled without giving any impression that the music is 'forced'. Sorry for my lack of better words to describe the sound. I had two Classé preamps driving my Alephs (DR5 and Thirty) which were nice but no match for the P1.7.

Regards,
Andreas

jleaman · 24th July 2003, 07:06 AM

How much did you pay for your caps ( the red one's ) here is a pic of my 1.7

jleaman · 24th July 2003, 07:08 AM

if you got them from digikey can you give me the part number.. and the part number's of the caps you used and stuff.. i'm also going to order the psu boards from kristian k also.

rwagter · 24th July 2003, 08:07 AM

Jason,

those are WIMA MKP's and digikey doesn't sell them

Ralph

ARAD · 24th July 2003, 11:20 AM

Jason, the Ono is the Phono stage... ;-)

The caps are actually 10 uF WIMA MKS4-100 caps that we purchased in Germany from Reichelt (www.reichelt.de). Current price is EURO 1.95/pcs. Since we ordered a lot, the price went down a little and we were able to match them.

Regards,
Andreas

24th July 2003, 06:58 AM	#6
ARAD diyAudio Member Join Date: Oct 2002 Location: Bavaria	some more info Jason - the Ono is the phone stage from NP, PQuadrat was willing to share his design and actually organized a group buy for the PCBs. The boards in the P1.7 are from Kristijan (the actual preamp PCB and the two small PSUs). The backplane (input select relays), the volume relay PCB and the small logic PCB controlling the volume board are 'our' work. We designed them and Kristijan converted them to his standards and got them produced (we = group of four colleagues that are currently building Aleph5s (http://www.passdiy.com/gallery/aleph5-p5.htm), Onos and P1.7s). The smal interim select/encoder PCBs mounted to the frontpanel are homemade and will be replaced once the APOX interface is ready. Thomas - the preamp works very well. No background noise, no hum at all, very detailed and very controlled without giving any impression that the music is 'forced'. Sorry for my lack of better words to describe the sound. I had two Classé preamps driving my Alephs (DR5 and Thirty) which were nice but no match for the P1.7. Regards, Andreas

24th July 2003, 11:20 AM	#10
ARAD diyAudio Member Join Date: Oct 2002 Location: Bavaria	correction and info Jason, the Ono is the Phono stage... ;-) The caps are actually 10 uF WIMA MKS4-100 caps that we purchased in Germany from Reichelt (www.reichelt.de). Current price is EURO 1.95/pcs. Since we ordered a lot, the price went down a little and we were able to match them. Regards, Andreas

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23rd July 2003, 10:58 PM	#5
ThomasLMcLean diyAudio Member Join Date: Feb 2003 Location: Slightly North of Portland	It looks professional. A very nice job. How does it sound?

24th July 2003, 07:08 AM	#8
jleaman Banned Join Date: Apr 2002	if you got them from digikey can you give me the part number.. and the part number's of the caps you used and stuff.. i'm also going to order the psu boards from kristian k also.

24th July 2003, 08:07 AM	#9
rwagter diyAudio Member Join Date: Jul 2002 Location: Netherlands	Jason, those are WIMA MKP's and digikey doesn't sell them Ralph

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