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Pearl MC Pre-Preamp
Pearl MC Pre-Preamp
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Old 6th September 2009, 08:25 PM   #201
vinylkid58 is offline vinylkid58  Canada
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Quote:
Originally Posted by dubai2000 View Post
I have aquestion regarding the 100pF cap (C1). When I tried to replace the original Panasonic film cap with a styroflex all I got is a loud hum. Any ideas why such a cap doesn't seem to work in that position?
Isn't C1 supposed to be 10,000uf not 100pf?

Edit: Sorry you are talking about C1 on the MC pre right?

Jeff

Last edited by vinylkid58; 6th September 2009 at 08:32 PM.
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Old 6th September 2009, 08:50 PM   #202
dubai2000 is offline dubai2000  Europe
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Yes, C1 on the MC pre.
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Old 14th September 2009, 10:41 AM   #203
24valveman is offline 24valveman  United Kingdom
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Hi, Does anybody have Pearl PCB's they would like to sell. I need 4 but 2 will do for now?

Regards to you all
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Old 2nd October 2009, 01:27 PM   #204
acidbrain is offline acidbrain  Netherlands
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Hmmm, those Lundahl LL9206 trannies are nice and small !
Looks to me that they are propely shielded, so I can connect the metal shield to the ground I want to build them together with my pearl in a metal case. Will this be sufficient against the horrible hum
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Old 2nd October 2009, 04:04 PM   #205
acidbrain is offline acidbrain  Netherlands
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Pearl MC Pre-Preamp
Default MC Step-Up Calculator

very handy...
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Old 11th October 2009, 01:03 PM   #206
acidbrain is offline acidbrain  Netherlands
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I honestly hope this will be the last time I'm closing my Pearl
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Old 11th October 2009, 09:59 PM   #207
Zen Mod is offline Zen Mod  Serbia
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Originally Posted by acidbrain View Post
I honestly hope this will be the last time I'm closing my Pearl
fugly !

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Old 11th October 2009, 10:07 PM   #208
acidbrain is offline acidbrain  Netherlands
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And the PoorSerbianMan Lightspeed goes in a same chassis like this
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Old 13th February 2010, 01:24 PM   #209
acidbrain is offline acidbrain  Netherlands
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A few things here for the archive.

1. I changed the 2sk170's for (SMD) BF862.
It gives a little bit more gain and clearer sound.


2. I also use the 9V battery option instead of that noisy zenerdiode.
I installed a Reed relais that is fed by the powersupply and that switches the battery off if the Pearl is shut down. This way the battery will last longer, it's only in use when the Pearl is powered. The sound is purer than using the zener.
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Old 13th February 2010, 03:19 PM   #210
moe29 is offline moe29  United States
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i always wanted to try the battery option - never got around to it.

nice hacking! The Pearl is a classic.
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