DIY? How to get feet wet?


I've read, in a number of threads in the analog forum, about the Bottlehead Products.

By nature I'm a tinkering kind of guy, but I'm young and when it comes to audio I've always let the pro's handle it for me -- really to avoid throwing money away.

The Seduction pre-amp is claimed to be an easy build, but I have no electrical engineering experience at all. How do I get my feet wet with this? How would I ever be able to learn if its for me with out actually trying to do it, rather than read about it?

Any suggestions, or stories?

--Jay
fightingwords

Showing 2 responses by bicycle_man

Hi,
Start with a kit that will result in a good sounding piece of equipment that you can live with for a while. E.g.: http://www.dynakitparts.com/store/product.aspx?id=2.
This is for a Dynakit St70. There is a huge amount of information about it on the Internet -- it has been modified extensively. After building the basic version, play around with mods to see if you like the sound changes.
By that time, your feet will be very wet! While doing this, read as much of the theory as you can find on the Internet. Most of the mod pages will also go into theory. More and more of it will sink in as you continue to read. If it's associated with a project or modification, you may see the practical application of the theory and it may make more sense to you.
Welcome to the world of DIY audio. It is so much fun. I am so satisfied when I complete a project and it sounds good! But, BE CAREFUL!!! Electronics projects expose you to LETHAL VOLTAGES! When you are probing circuit points with a volt meter, keep one hand in your pocket, literally. This avoids you providing a complete circuit path for the electrical current, and thus DEADLY SHOCKS. You can attach the ground probe to the chassis with an alligator clip.
Hi,
The St70 does require biasing adjustment. It is easy to do -- you just need a flathead screwdriver and a voltmeter (even the cheap portable one from radio shack will do).
I have any original Dynakit St70, and the bias voltage drop is read from a pin from a tube socket on the front panel. I am not sure where it is measured on the new kits, but it is probably the same. Or else, the instructions will tell you how.
Enjoy!