Monday, February 25, 2019

Yet Another Passive Amp Scroll Saw Pattern.



These smartphone passive amps are probably more of a novelty than actually are useful. I have designed a few of these and I keep trying to get more volume. This is the best I have designed so far. I have not measured the volume increase but I would guess it is about a 50% to 75% increase.

It does also have another benefit. It seems to increase the fullness of the music. Maybe more bass?

I made this prototype out of Baltic birch plywood but you can also use a nice hardwood.



I added a leather seal over the opening to help keep the sound in the channel.


After I glued up the tube I sanded an angle so the cone would be angled up. It just looks better.


Click to Order
$12 per sheet of 12 coins plus $3.50 shipping
Inlay with a 1" Forstner Bit.
The perfect way to sign your work.
Video Demonstration Link

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Products for your consideration:


Every Scrollsaw Workshop Pattern from 2007-2018 in DVD


Purchase the entire Scrollsaw Workshop pattern catalog for offline access.

This DVD has over 2,600 patterns published from 2007 thru 2018.
The DVD is $20 plus shipping. Ships to 60 countries around the world.
If you use the DVD on a Windows PC there is a simple viewer program to browse through the patterns.

The DVD also works fine on a MAC. The viewer program is not MAC compatible but there is an included PDF with all the patterns shown as thumbnails for easy viewing.

Now Available on USB Thumb Drive

Don't have a DVD drive on your new computer. No problem. Buy the catalog on a USB thumb drive.
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Scroll Saw Pattern Design Tutorial: DVD
Let me teach you to create a beautiful wooden portrait pattern. I will show you everything you need from start to finish. The video will show you the free software program you can download for Windows or Mac OS. I will show you how to install the program and configure it for best results. 
Then I will show you the technique to take your photograph and make a pattern from it. When the pattern is complete we will go in the shop and cut it.
The DVD is $10 plus shipping. This is a data DVD that you will use on your computer to watch the video tutorial  


Unique Wooden Vases:
Want to create beautiful wooden vases on the scroll saw?
My two "Wooden Vases on the Scroll Saw" books make it easy.

The books are $12 each and available for instant download after purchase. Click for Video Demonstration.


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I own this Half Mask Respirator and use it when I stir up lots of dust. It's a bit too big to use while I ma working at the scroll saw but it's great for working at the table saw or when I empty the dust collector. It is the most comfortable half mask I have tried.

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