Pearl enclosure and power supply?

Boban · 26th February 2003, 02:42 PM

Hi,
I am wondering what type of enclosure is suggested for Pearl. I looked at Hammond cataloque (aluminum boxes) but couldn't find anything suitable. Any suggestions?
Second, can I increase value of the ps capacitors without compromising anything (or much). I am thinking of using 22000uF instead of suggested 10000uF in the power supply (fig 4 in the manual).

Thanks
Boban

transducer · 26th February 2003, 03:31 PM

Hi Boban,

I'm in Toronto as well, and have built a lot of electronics and speakers. I'd love to hear the Pearl (thinking of building it or the Ono). I can offer you some help, seems like this is the first time you've built something, and maybe then you'd let me use your Pearl in my system to test it?

What exactly did not work with the Hammond enclosures? I can suggest some other places to look as well.

Cheers,
Ron

Boban · 26th February 2003, 03:41 PM

Problem with Hammond is that I could't find enclosure with the dimensions I like. The ideal (for me) would be something like 11x10x3.

Regards
Boban

transducer · 26th February 2003, 03:45 PM

Check at Supremetronics, on Queen St. W. just east of Active Surplus. They have different size enclosures, one might fit. The other place to check is on Victoria Park, across from Sayal, near Electrosonic. I can't remember the name, but if you look for Sayal on Vic Park just south of Steeles, and then cross the street to the west side and go north about a block, there's a strip mall, there's a parts and computer store that carries enclosures.

Ron

transducer · 26th February 2003, 03:51 PM

Hammond aluminum enclosure, 12x10x2", part no. 1444-29 and bottom plate 1434-29. If you don't need the height, this could work. The tallest thing is likely your tranformer, maybe the ps caps, they should fit. The caps can go on their sides if need be.

Ron

Boban · 26th February 2003, 03:57 PM

Yes, you are correct. Caps are problem and that's why I am looking for something taller than 2 inch. Will check the places you've recommended.

Boban

Saurav · 26th February 2003, 05:07 PM

Go for 3" depth, you'll need it with the PCB standoffs and the electrolytic caps.

I used a Hammond 17x10x3 chassis (if I remember right). Worked out fine, because I recently got a new MC cartridge, and there was room left over in the chassis for the step-up transformers so I didn't have to add extra RCA connections to the signal path.

P.S. I built an outboard power supply, in a cheap Radio Shack enclosure, so I didn't have to fit PS transformers inside the main chassis. If you're building the Pearl in one enclosure, your height requirements might change.

Boban · 26th February 2003, 05:59 PM

Thx Saurav,
what about the umbilical cord?

Saurav · 26th February 2003, 06:25 PM

I think I tried multiple options, and then ended up with some multi-conductor cord I bought somewhere. I know that thicker gauge would be better for the power and ground lines, but it seems to work fine, and the hum levels are acceptable in my system, so I haven't bothered with trying to improve it. I bought male/female DIN connectors and soldered 4 of the conductor wires in the cable to 4 pins on the DIN connector. I think my cable is shielded, and off the top of my head I don't remember if I connected the shield at one end or both ends. I was battling serious RFI problems at one point (after I rewired my tonearm), so I was trying everything I could think of.

PaulyG · 26th February 2003, 06:30 PM

I built a combination of the pearl phono section and the Aleph L as my line preamp. The preamp sounds great! I used enclosures from Par Metals in NJ (one for the power supply and one for the electronics). Par has some nice 19" rack mount enclosures at very good prices. I do not know if they export to the Great White North, however (although I shouldn't talk as it is pretty snow-covered here in Connecticut).

-Paul

http://www.par-metal.com/

26th February 2003, 02:42 PM	#1
Boban diyAudio Member Join Date: Feb 2003 Location: Toronto	Pearl enclosure and power supply? Hi, I am wondering what type of enclosure is suggested for Pearl. I looked at Hammond cataloque (aluminum boxes) but couldn't find anything suitable. Any suggestions? Second, can I increase value of the ps capacitors without compromising anything (or much). I am thinking of using 22000uF instead of suggested 10000uF in the power supply (fig 4 in the manual). Thanks Boban

26th February 2003, 06:30 PM	#10
PaulyG diyAudio Member Join Date: Nov 2002 Location: Connecticut	Enclosures I built a combination of the pearl phono section and the Aleph L as my line preamp. The preamp sounds great! I used enclosures from Par Metals in NJ (one for the power supply and one for the electronics). Par has some nice 19" rack mount enclosures at very good prices. I do not know if they export to the Great White North, however (although I shouldn't talk as it is pretty snow-covered here in Connecticut). -Paul http://www.par-metal.com/

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26th February 2003, 03:31 PM	#2
transducer diyAudio Member Join Date: Mar 2002 Location: Toronto, Canada	Hi Boban, I'm in Toronto as well, and have built a lot of electronics and speakers. I'd love to hear the Pearl (thinking of building it or the Ono). I can offer you some help, seems like this is the first time you've built something, and maybe then you'd let me use your Pearl in my system to test it? What exactly did not work with the Hammond enclosures? I can suggest some other places to look as well. Cheers, Ron

26th February 2003, 03:41 PM	#3
Boban diyAudio Member Join Date: Feb 2003 Location: Toronto	Problem with Hammond is that I could't find enclosure with the dimensions I like. The ideal (for me) would be something like 11x10x3. Regards Boban

26th February 2003, 03:45 PM	#4
transducer diyAudio Member Join Date: Mar 2002 Location: Toronto, Canada	Check at Supremetronics, on Queen St. W. just east of Active Surplus. They have different size enclosures, one might fit. The other place to check is on Victoria Park, across from Sayal, near Electrosonic. I can't remember the name, but if you look for Sayal on Vic Park just south of Steeles, and then cross the street to the west side and go north about a block, there's a strip mall, there's a parts and computer store that carries enclosures. Ron

26th February 2003, 03:51 PM	#5
transducer diyAudio Member Join Date: Mar 2002 Location: Toronto, Canada	Hammond aluminum enclosure, 12x10x2", part no. 1444-29 and bottom plate 1434-29. If you don't need the height, this could work. The tallest thing is likely your tranformer, maybe the ps caps, they should fit. The caps can go on their sides if need be. Ron

26th February 2003, 03:57 PM	#6
Boban diyAudio Member Join Date: Feb 2003 Location: Toronto	Yes, you are correct. Caps are problem and that's why I am looking for something taller than 2 inch. Will check the places you've recommended. Boban

26th February 2003, 05:07 PM	#7
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	Go for 3" depth, you'll need it with the PCB standoffs and the electrolytic caps. I used a Hammond 17x10x3 chassis (if I remember right). Worked out fine, because I recently got a new MC cartridge, and there was room left over in the chassis for the step-up transformers so I didn't have to add extra RCA connections to the signal path. P.S. I built an outboard power supply, in a cheap Radio Shack enclosure, so I didn't have to fit PS transformers inside the main chassis. If you're building the Pearl in one enclosure, your height requirements might change.

26th February 2003, 05:59 PM	#8
Boban diyAudio Member Join Date: Feb 2003 Location: Toronto	Thx Saurav, what about the umbilical cord?

26th February 2003, 06:25 PM	#9
Saurav diyAudio Member Join Date: Sep 2002 Location: Oregon, USA	I think I tried multiple options, and then ended up with some multi-conductor cord I bought somewhere. I know that thicker gauge would be better for the power and ground lines, but it seems to work fine, and the hum levels are acceptable in my system, so I haven't bothered with trying to improve it. I bought male/female DIN connectors and soldered 4 of the conductor wires in the cable to 4 pins on the DIN connector. I think my cable is shielded, and off the top of my head I don't remember if I connected the shield at one end or both ends. I was battling serious RFI problems at one point (after I rewired my tonearm), so I was trying everything I could think of.

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