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Building a Pearl 2
Building a Pearl 2
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Old 28th June 2020, 05:51 PM   #2311
WBS is offline WBS  United States
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Building a Pearl 2
Quote:
Originally Posted by Zen Mod View Post
...it's much more rewarding chasing some vinyl, instead of chasing just another set of caps
Truer words have not been posted on diyaudio.

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Old 28th June 2020, 08:40 PM   #2312
Wellerman is offline Wellerman
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My wife thinks I'm chasing too much vinyl :-)
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Old 28th June 2020, 08:46 PM   #2313
jackinnj is offline jackinnj  United States
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Building a Pearl 2
Quote:
Originally Posted by Wellerman View Post
My wife thinks I'm chasing too much vinyl :-)
No kidden. The French fashion designer Andre Courreges was famous for vinyl skirts -- he designed the "go-go" boot and "mini-skirt" too!
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Old 1st July 2020, 01:36 AM   #2314
tayj10 is offline tayj10  United States
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Since my last post, I've tried both Pearl 2s with my cartridge on a Sota table and heard the same thing--severely rolled-off highs. It's still a mystery why my Ortofon Blue doesn't play well with the Pearl 2, but I prettied up my PSU so I thought I'd post it. I hot-glued the caps down to the chassis, but I might try to come up with a sturdier solution for peace-of-mind.
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File Type: jpg phono.jpg (408.4 KB, 64 views)
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Old 1st July 2020, 01:45 AM   #2315
itsikhefez is offline itsikhefez  United States
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Building a Pearl 2
Very nice wiring work on the PSU.
Are those PS boards still available anywhere?

For securing caps, I place cable tie mounts on the bottom, then secure the caps on to them with zip ties.
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Old 1st July 2020, 01:48 AM   #2316
tayj10 is offline tayj10  United States
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Quote:
Originally Posted by itsikhefez View Post
Are those PS boards still available anywhere?
Yeah, I think they're still available on Peter Daniel's website.

Thanks! I'd definitely feel more comfortable knowing there's no way the caps/board could get knocked loose and cause a short.
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Old 1st July 2020, 01:50 AM   #2317
mymindinside is offline mymindinside  United States
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tayj10 you could also use capacitor clamps (the ones that look like hose clamps) and bolt them to the bottom of the chassis.
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Old 1st July 2020, 02:46 AM   #2318
KevinHeem is offline KevinHeem  United States
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Building a Pearl 2
Quote:
Originally Posted by tayj10 View Post
--severely rolled-off highs.
This may have been asked before....but are you sure you have the caps in the RIAA section in their correct positions?
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Old 1st July 2020, 02:51 AM   #2319
tayj10 is offline tayj10  United States
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Originally Posted by KevinHeem View Post
This may have been asked before....but are you sure you have the caps in the RIAA section in their correct positions?
Yes, I'm pretty certain that everything is in the right place. I posted pictures previously.
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Old 1st July 2020, 04:17 AM   #2320
tayj10 is offline tayj10  United States
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I played some white noise through my Pearl 2, and the resulting spectrum analysis from Audacity illustrates that the Pearl 2 seems to be working properly. I don't have a reverse RIAA, but at a quick glance it seems to fit the RIAA curve pretty accurately from 20-20kHz.

So, this seems like it would point to a capacitance/resistance loading issue with my cart.
My cart should need 150-300 pF capacitance and 47k resistance loading according to Ortofon.
I've tried 0-300 pF loading in C22, but nothing helps.
I've confirmed that my Pearl 2 reads 47k on the inputs with my DMM.

If the problem were that the tables and cables had too much capacitance in the wiring, I would think I would have the same issue with an NAD pre-amp that has 47k/100pF, but it works just fine. It also works fine on my Onkyo surround receiver.

My cartridge just doesn't work with two different Pearl 2s on two separate turn tables.
I'm nearly to the point of just getting a different cartridge, and even if that is the solution, I'd still like to know why this is happening.
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