Groovewatt Tube RIAA Phono Preamp

post from DIY Audio Projects - Hi-Fi Blog for DIY Audiophiles on 02 November 2011 11:36:40 PM. © DIY Audio Projects - Hi-Fi Blog for DIY Audiophiles

The latest project from Bruce's workbench is the Groovewatt, a tube based RIAA phono preamplifier. The Groovewatt is the result of over one year of work and several build iterations. Bruce set some pretty high performance requirements for the tube preamp and he is very pleased with the results.
Second Groovewatt Build The Groovewatt uses a symmetrical SRPP (12AX7) input stage which feeds a passive RIAA equalization network. The second gain stage is nearly identical to the input stage and is direct coupled to the third stage which is a cathode follower (12AT7). Bruce used Gold Pin JJ ECC83S for the SRPP stages and half of a ECC81 for each side of the cathode follower. The power supply is solid state and DC is used for the tube heaters. Total gain of the RIAA phono preamp is about 45 dB which should be sufficient for use with a high output MC cartridge.
Inside View - Third Groovewatt BuildThird Groovewatt BuildThe measured performance of the Grovewatt is excellent and noted in the project page. Bruce reports excellent results with the Groovewatt in place in his system. For the full details of the Groovewatt, see the DIY Vacuum Tube (Valve) RIAA Phono Preamp project page.
More Hi-Fi Vacuum Tube Projects by Bruce

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See the DIY Audio Projects website for more project ideas.
Need parts for your projects - try Tube Depot for your vacuum tube needs and Parts Express for almost everything DIY Audio and Video.

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http://feedproxy.google.com/~r/diyaudioprojects/~3/bmPiU5S2oaQ/groovewatt-tube-ri
aa-phono-preamp.html

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A Good Read: Getting Started in Pinewood Derby

post from Toolmonger on 02 November 2011 10:35:36 PM. © Toolmonger

Most kids speak with great nostalgia when the subject of Pinewood Derby cars is brought up. Designs from the speedy and elegant to the loud, and in my case at least, ridiculous. However there are a growing group of both parents and kids who know don’t know a thing about how to craft a racer or what’s possible to do in the first place. Our friend Troy Thorne over at Fox Chapel Publishing recently wrote Getting Started in Pinewood Derby to try and remedy that.

Troy has an excellent way of breaking the process down and giving step by step instuctions that builders of any age can both understand and duplicate complete with sweet pictures and helpful tips that get you over the rough spots.

There are also a dozen plans in the book that can be cut out and used as templates to replicate his designs exactly and give the other competitors a run for their money. Couple this with the painting ideas, axle and wheel prep, weighting and test run instructions and you’ve got 95 pages of racer building know how to back you and the young’n up.

When we met him at Maker Faire a few years ago our first question to Troy was “Do your designs really work?” He pointed us over to his booth where he had close to 50 lightning fast racers on display with a test track set up behind them and told us to find out for ourselves. We did. They Do.

If you’re looking for step-by-step awesome in a book that will put a smile on your kids face and be competitive entry into the local race Mr. Thorne’s Getting Started in Pinewood Derby is a great start.

Getting Started in Pinewood Derby [Fox Chapel Publishing]
Via Amazon [What’s This?]

Read The Full Article:
http://toolmonger.com/2011/11/02/a-good-read-getting-started-in-pinewood-derby/

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How to Build and Tune a Wind Chime

post from How to of the Day on 02 November 2011 08:00:00 PM. © How to of the Day

The soft sound of wind chimes is both soothing and uplifting. It's an instrument that plays itself gently in the breeze, creating a sound that is soon a familiar part of your own environs.Making your own wind chime and tuning it is a lovely project for the handyperson who would like to craft this peaceful object and enjoy the results for years to follow.

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http://www.wikihow.com/Build-and-Tune-a-Wind-Chime

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Mural Project: Kids Room Ideas

post from THAT PainterLady.com on 02 November 2011 04:36:29 PM. © THAT PainterLady.com

Originally uploaded by THAT Painter Lady. Lots of people write in for ideas. They want ideas on what to paint their walls. What color they should paint their cabinets. What to paint in their dining room. While we LOVE helping people it’s really hard to tell someone else what to paint on their walls for [...]

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http://www.thatpainterlady.com/kids-room-mural-idea/

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Halloween Costume: Huldra

post from Cut Out + Keep on 02 November 2011 03:35:22 PM. © Cut Out + Keep

-insert snappy description here, please-

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http://www.cutoutandkeep.net/projects/halloween-costume-huldra

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Crochet Plastic Bag Holder

post from Cut Out + Keep on 02 November 2011 03:35:22 PM. © Cut Out + Keep

a simple crochet patttern

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http://www.cutoutandkeep.net/projects/crochet-plastic-bag-holder

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Bob Marley Earrings

post from Cut Out + Keep on 02 November 2011 03:35:22 PM. © Cut Out + Keep

Make these earrings or earrings with your favorite personality...

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http://www.cutoutandkeep.net/projects/bob-marley-earrings

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Books: I am cute dresses + You sew, girl

November is book month at Whipup.net I Am Cute Dresses: 25 Simple Designs to Sew. By Sato Watanabe, English version published by Interweave Press; Reprint edition (September 13, 2011). I am happy that Japanese clothing designer Sato Watanabe’s book I Am Cute Dresses is now available in English. The 25 dresses in this book are [...]

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http://feedproxy.google.com/~r/WhipUp/~3/YIDegHpXMpc/

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Owl Brooch Diy

'insert hooter joke here'

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http://www.cutoutandkeep.net/projects/owl-brooch-diy

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Tipnuts Weekly Update: {November 2nd, 2011}

It’s time for Tipnut’s Weekly Update! Here’s what’s new this week: an interesting home remedy for treating cellulite, a vintage pansy motif to make a quilted bedspread, free household budget worksheets to download, DIY dresser transformations, shepherds pie recipes plus lots of new projects added to the current collections. Have fun! Household Budget Worksheets & [...]

[[ This is a summary only -- Click the title Tipnut?s Weekly Update: {Today's Date} to see all the goodies ]]

Read The Full Article:
http://tipnut.com/november-2nd-2011/

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