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Old 31st July 2007, 10:09 AM   #501
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My mistake, I thought the Pearl was a preamp with phono stage. Thanks for the clairification.

Paul
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Old 7th August 2007, 08:50 PM   #502
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Location: Germany
I have had some requests for more KITs and I still had some parts and PCBs but uncompleted KITs laying around.

I finaly found time to match parts and put the last KITs together.

I have 15 KITs and some extra PCBS.
These will be the last available KITs from me so the first ones to order will also get them.

If you are interested please contact me for more details.

Greetings Promitheus
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Old 15th September 2007, 09:45 PM   #503
SRMcGee is offline SRMcGee  United States
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Folks:

Does the IRF9610 need to be isolated from the heatsink, or the heatsink from the PCB? Pass' Pearl Phono Stage manual says to use plastic washers to isolate the heatsink from the PCB (see p. 5), but I couldn't find any washers in the kit.

Thanks,
Scott
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Old 2nd October 2007, 12:35 PM   #504
culture is offline culture  Netherlands
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Hi All

Yesterday i put all the bits and pieces together from the kit, i have to say i really enjoyed myself!! first time true hole soldering... not that i soldered that much more than my own interlinks, a few speaker wires and few part there (about 10 years ago)... Today i went to the shop to get a transformer and some other essential parts (fuse, wire and so on) and hopefully i'll be able to play some music tonight. It's my first project....

If anyone has some good tip for me before firing up this baby, please let me know

But yesterday i was trying to figure out where to use the nice little black 100k resistor from the riaa pack, i presume it must be R24 since that resistor is mentioned in the riaa network description and most people seem to have used the nice little black one there aswell. Accept for Igreen, he has the nice little black one as r15 (see post 458). Don't know if this was already mentioned to him by someone or if it's any problem at all... but i thought lets mention it anyway.

Anyway, cant wait to go home, finish this and start testing!!

cheers,

c
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Old 2nd October 2007, 02:17 PM   #505
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Hello,

R24 is part of the RIAA filter with C11 and C12 there.
Dont forget to connect the ground wire were C15 is. Thats the white line on the PCB.
If you have already soldered C15 its no problem just solder the wire under the PCB.

For those who have sent emails and ask about the PEarl KIT, I still have around 10 KITs left so if you are interested get them while they are still there because as I said these will be the last ones I will have.
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Old 2nd October 2007, 02:35 PM   #506
culture is offline culture  Netherlands
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Hi

Thanks for the advice, thats something i didn't do indeed!!

One other very basic question, the heatsink, do i also solder that to the pcb?

cheers!

c.
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Old 2nd October 2007, 03:09 PM   #507
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You can isolate the transistor from the PCB if you dont want it to have a voltage on it. You do have to solder the Heatsink for stability.
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Old 2nd October 2007, 03:21 PM   #508
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Default Size of PSU boards?

I have one of these KITS on order (Big thanks again to Promethius for putting this together).

I was just wondering if anybody could tell me the dimensions of the PSU boards. I'm trying to locate some enclosures for both the Power Supply and the phono section and want to make sure I get one large enough (but not too large).

Also, does anyone see a problem with using 2 of these transformers instead of the single Plitron mentioned in the original Pass document?

http://www.partsexpress.com/pe/showd...number=122-605
I am assuming there wouldn't be a problem wiring these in series to get a single 30V output. Let me know if I'm making the wrong assumptions. In the US, this is probably one of the cheaper solutions that I've been able to find, using Toroids anyway. Since I'm already going to place an order to P.E., this should save on a separate shipping charge.
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Old 2nd October 2007, 03:39 PM   #509
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The dimensions are 126mm x 178mm. I think its 5x7" for one.

You can use secondaries in series to get higher voltages.
like 2 x 30V to get 60V.
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Old 2nd October 2007, 03:41 PM   #510
culture is offline culture  Netherlands
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Hi Promitheus

I bought two "isolation devises" (how do you call them??) today. so i'm on the right track there.

But about the ground wire, you lost me there a bit after all. looking at this picture:
http://www.diyaudio.com/forums/attac...amp=1117273300
or others i only see this black wire coming from the board and not connecting to anything (yet)
on this picture i see noting: http://www.passdiy.com/images/projects/pearlfig13.jpg

cheers,

C.
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