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Old 24th February 2014, 08:43 PM   #31
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I want to shrink the RIAA down to something smaller and was wondering if this SMD version (resistors) seems insane or feasible? Im worried about noise and hope someone could throw an eye on the design. The SMD resistors are 1206 package.
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Old 25th February 2014, 07:34 AM   #32
ionian is offline ionian  Turkey
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Quote:
Originally Posted by RobFreak View Post
I prefer direct source rather than the batteries. Perhaps its possible to find a regulator/filter as DIY, since 56$ seems like quite alot?
Can you give some link about this regulator/filter as DIY? What components do you suggest I use?
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Old 25th February 2014, 08:02 AM   #33
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Originally Posted by ionian View Post
Can you give some link about this regulator/filter as DIY? What components do you suggest I use?
Im sorry for the confusion, but it was actually a question. Although i found this one from LCAudio: L C Audio Technology / Lownoise Regulator

There is a schematic, but the voltage output range is not really sufficient.
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Old 25th February 2014, 08:04 AM   #34
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I like the way you have put your case together, holding the module in place with string. Great DIY And the light at the front.. Cool.

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Originally Posted by ionian View Post
Click the image to open in full size.

Click the image to open in full size.
I definitely recommend using the battery. I made above battery pack include 20pcs 1.2V 2200mA rechargeable Sub-C NiCd battery | eBay 1.2Vx20=24V
I am using this charger for my battery pack: Intelligent Charger for NiMH NiCd 1 2V to 24V Battery Pack by 1 20pcs Cells US | eBay

If you are planning to use 24VDC from a converter and eventually filtering the noise, there is a serious option in my opinion:
1. Transformer (24V Output): Hammond Transformer - More Information Page
Hammond Transformer: Hammond Mfg. - Toroid Power Transformer - (182 Series)
Click the image to open in full size.

2. Ultra Low Noise Positive Regulator 2.5V~30V Output High Current Type There is two type: 250mA and 4A: ULN HC78C Ultra Low Noise Positive Regulator | eBay

Click the image to open in full size.
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Old 25th February 2014, 08:23 AM   #35
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Coincidentally I've ordered 1x 20V ULN-RD78A from Ebay to power my Boozehound Labs JFET phono and B1 buffer combination. Currently I'm using 2x MC7818CT. I expect delivery in a couple of weeks and will let you know how well it works. I've got efficient Tannoy dual concentrics so should be able to judge changes to the noise floor easily.
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Old 25th February 2014, 08:42 AM   #36
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I was recommended this regulator: SSR01 Sjstrm Super Regulator - Sjstrm Audio
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Old 26th February 2014, 05:39 AM   #37
Hikari1 is online now Hikari1  United States
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A simple 317 based reg would work...maybe not the best performance though.

1 5 to 29V DC Adjustable Voltage Regulator Module Board Based on LM317SKU163002 | eBay

A better sounding option would be a shunt reg or a super regulator like this:

Super Regulator V2.2 - Power Supplies and Accessories - Circuit Boards

You would only use the positive side.

I use 16 AA batteries in mine.
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Old 26th February 2014, 06:18 AM   #38
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The super regulator from diyaudio looks interesting aswell. I think it will be either that or the Sjöström. For the sake of logistics i may be tempted to pick Sjöström hence its shipped from Scandinavia..

Quote:
Originally Posted by Hikari1 View Post
A simple 317 based reg would work...maybe not the best performance though.

1 5 to 29V DC Adjustable Voltage Regulator Module Board Based on LM317SKU163002 | eBay

A better sounding option would be a shunt reg or a super regulator like this:

Super Regulator V2.2 - Power Supplies and Accessories - Circuit Boards

You would only use the positive side.

I use 16 AA batteries in mine.
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Old 27th March 2014, 06:37 AM   #39
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Quote:
Originally Posted by dine1967 View Post
Boozhound Laboratories: JFET Phono Preamp Kit

This is a bit modified version and works very well. I have assembled it on a veroboard and it sounds great.
I also built this version.
for what it costs, it sounds very good but is plagued by background noise, which increases with increasing volume.
to my ears sound better this one: http://diyaudioprojects.com/Solid/JF...no-preamp.html
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Old 27th March 2014, 06:48 AM   #40
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Quote:
Originally Posted by RobFreak View Post
The IN and OUT traces were very close on the previous design so i remade it a bit. To be honest i wanted to build a SMD version, but is it feasible to source similar component equivalents in SMD as TH?

I'm wrong or these drawings are wrong?
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