Bottlehead Forum

Bottlehead Kits => Crack => Topic started by: xcortes on February 02, 2012, 11:13:10 AM

Title: Speedball transistors
Post by: xcortes on February 02, 2012, 11:13:10 AM

Why does the CF C4S on the Speedball upgrade use different transistors than the "regular"? Just when I though I understood how to design a C4S you throw a curve ball!

Title: Re: Speedball transistors
Post by: Paul Birkeland on February 02, 2012, 02:23:09 PM

Hello Xavier,

The TIP50 is essentially an MJE-340 that is just a little bit beefier.  Also, the larger size of the case helps to get rid of the heat more efficiently.

-PB

Title: Re: Speedball transistors
Post by: xcortes on February 02, 2012, 06:25:34 PM

Hi Paul,

That's what I figured. More so since the values of resistors seemed to behave identically.

But I thought I'd rather ask.

On to building my modified Crack to drive my 800 ohm speakers then.

Thanks!

Title: Re: Speedball transistors
Post by: Paul Birkeland on February 02, 2012, 06:28:22 PM

I'm totally excited to see the results of your project.  This has been one of those things that has been discussed quite often, but never followed through.