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Old 20th February 2013, 08:43 PM   #1841
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I'll stick to my JBL K2's and public transport . LOL
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Old 20th February 2013, 09:15 PM   #1842
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I finished my Pearl II tonight. Well, almost, as one last improvement I will replace the rectifier bridges in the PSU with discrete LQA06T300 diodes.

Mine has the following changes compared to the original schematic:

R20 set for 100 Ohm load
R10 lowered to 4K7 to get voltages right around Q3 (due to my particular quad of 2SK170's)
R14 lowered to 680 Ohm for approximately 58.5dB gain.

Some pictures:

Inside the box
Click the image to open in full size.

Front:
Click the image to open in full size.

Back:
Click the image to open in full size.
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Old 20th February 2013, 09:47 PM   #1843
6L6 is offline 6L6  United States
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That looks great! Is everything working properly? How's it sound?

And I have to know how you did the lettering, it's very clean.
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Old 20th February 2013, 10:11 PM   #1844
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Nice tidy job Wellerman.

I think I could take a few tips from the way your's is wired a redo mine tomorrow .

I took my board ground to a chassis star ground then to the TT ground . I still have problems with noise ,but have ordered ZTX and ZVP to replace the ones in the duff board .

I double checked the TT yesterday and couldn't find any issues .

Just gotta keep going

Where should I take the LED power from ?

Cheers R
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Old 21st February 2013, 12:37 AM   #1845
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Default Bangle Version of a DustBuster ?

6L6 - now THAT is cruel !! "Bangleized" in my lexicon means beaten with an ugly stick !!

We've got an E350, which has the best sound I've ever heard in an automobile. I'd like a CLS550, but they are a little too dear these days. I'd REALLY like a McLaren MP4-12C, but they are very dear indeed. Oh well.
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Old 21st February 2013, 03:32 PM   #1846
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Quote:
Originally Posted by 6L6 View Post
That looks great! Is everything working properly? How's it sound?

And I have to know how you did the lettering, it's very clean.
As far as I can tell everything works fine. It sounds neutral, and very good. I still have to compare it to the phono stage in my Sony amp.

The lettering I ordered in a shop specializing in self adhesive lettering (superletters.nl). They are -how appropriate- matt black vinyl. Each word is one item, so that helps in getting it neat.

@richluvsound: I took the power from the led straight from the DC in, in this case the 0 and -35V. 1 have 2 10k resistors on the led. The led in the PSU takes its power from the 0 and +35V, so with both leds combined I can check both the positive and negative rail.
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Old 21st February 2013, 03:52 PM   #1847
poli is offline poli  Germany
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Very well done, Wellerman! Good work!
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Old 21st February 2013, 04:48 PM   #1848
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Wellerman - what did you use for the DC jack, plug, and cable?
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Old 21st February 2013, 08:48 PM   #1849
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DC jack and plug are Neutrik XLR parts. Cable is 3x 0.5 sq mm copper wire which I
braided. I'm still looking for a sleeve to protect this cable. The mains cable is just an ordinary computer psu cable.
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Old 21st February 2013, 11:03 PM   #1850
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Quote:
Originally Posted by Wellerman View Post
DC jack and plug are Neutrik XLR parts. Cable is 3x 0.5 sq mm copper wire which I
braided. I'm still looking for a sleeve to protect this cable. The mains cable is just an ordinary computer psu cable.
Would you be able to look up links to those parts?
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