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Old 12th November 2004, 11:34 PM   #1
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Default Pearl Phono stage

The parts list shows R1, C14, C16 as "User Value". I cannot find any mention of these parts in the manual or on the schematic. What do these parts do and how do I go about choosing values for them?

Also, in addition to the Vishay resistors, I noticed Mouser also sells Wima caps. Has anyone tried using Wima instead of Panasonic for the film caps?
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Old 13th November 2004, 12:31 AM   #2
moe29 is offline moe29  United States
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I guess you ran into the same problem i did when ordering parts
this week. DigiKey is out of the .15uF panasonics. Looks like they
won't be getting them in until mid-December.

I couldn't find a Wima part at .15uF on Mouser... but then again
i might have missed it - difficult to read online guide.

I have substituted a higher voltage Panasonic cap while i'm building
and have the Pearl on the bench, and will replace it when the
other part becomes available.

If someone can give part #'s and a place to buy the Wima's i'd
give them a try too.

m.
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Old 17th November 2004, 04:16 AM   #3
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Old 17th November 2004, 09:20 AM   #4
steenoe is offline steenoe  Denmark
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Quote:
The parts list shows R1, C14, C16 as "User Value". I cannot find any mention of these parts in the manual or on the schematic. What do these parts do and how do I go about choosing values for them?
Those components are for loading your cartridge.
It is not sure you need to install those.
You can find lots of info about this here:
http://www.passlabs.com/downloads.htm
Look for the ONO literature.

Mr. Pass is such a kind man

Steen.
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Old 2nd June 2005, 06:03 PM   #5
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I need to reduce the gain of the Pearl phono stage. I would like to switch to a higher output cartridge. I follow the Pearl with a line stage that has a minimum gain of 7dB because of the output transformer. I am using this in a calibrated (0VU = 7cm/sec stereo) lacquer cutting setup. So far I have been unable to get a pad to work without increased distortion.

Besides designing a correct output pad is there a way to reduce the gain by 12dB or so?
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