2n 3055

Hello,
I had find recently 3(three) pairs of this kind of tranz.
Anybody got a schematic,a PCB file and the placement jpeg. for the part`s?
I whould like to beginne this project... Or maby U know a simpler one.
Tanks.

Sorry for my bad writhing i`m from Romania.

chiriac_marius said:

Hello,
I had find recently 3(three) pairs of this kind of tranz.
Anybody got a schematic,a PCB file and the placement jpeg. for the part`s?
I whould like to beginne this project... Or maby U know a simpler one.
Tanks.

Sorry for my bad writhing i`m from Romania.

Click to expand...

The 2N3055 is probably THE standard TO3 NPN power transistor, it's been used for years and years - basically it's 115W, 15A, and about 65V. You can use a pair of them in an amplifier to give about 50W, use two pairs for a 100W amp. They are also commonly used in linear PSU's, what sort of project do you have in mind?.

Hey,
I whant to build a amplifier, from ZERO, but as U said if I have three pairs then I whould have a 150W amplifier ?... Corect?
All I need now is the schematic, PCB file, the list with the parts and how to place them .
If I whould have these things I`m on my way to starting this project.



Marius.


P.S. My first project was a amplifier 4X50W/2X100W with TDA2030 and it has a preamplifier with corector ton with TCA5500 Vol/Bal/Bass/Treeble and with digital potentiometer and a VU meter with 15 Led on itch channel.

chiriac_marius said:

Hey,
I whant to build a amplifier, from ZERO, but as U said if I have three pairs then I whould have a 150W amplifier ?... Corect?

Click to expand...

It depends on your speaker impedance, two will give 50W into 8 ohms, four will give 100W into 4 ohms - these are the common speaker impedances. For 150W you would require 2.7 ohm speakers.

You can't increase the output into higher impedances because of the voltage rating of the 2N3055 - you need different transistors for that. I've just been given a 300W PA amp, that uses eight 2N2442's in the output stage - these are similar to the 2N3055, but have a higher voltage rating.

All I need now is the schematic, PCB file, the list with the parts and how to place them .
If I whould have these things I`m on my way to starting this project.

Click to expand...

You might like to have a look at **broken link removed**, Figure 1 is a suitable circuit - the TIP3055 transistor specified is simply a plastic version of the 2N3055. There should be plenty of designs out there on the net, even my old Leak Stereo 70 amplifier (classic British HiFi) used the 2N3055 as the output transistors.

Here is an Interesting Site.
https://www.hilberink.nl/amps/amps.htm

Bear in mind the 150W circuit isn't suitable for 2N3055's, due to the supply voltage being too high.

Here are some more Links

2N3055 NPN AF Power Amp Max 150W TO-3

http://www.ampslab.com/c70.htm
**broken link removed**
**broken link removed**
http://www.electronics-lab.com/projects/audio/004/
http://www.qedata.se/e_js_pr-audio.htm
**broken link removed**
http://www.alphalink.com.au/~cambie/
**broken link removed**
**broken link removed**
http://www.siliconchip.com.au/cms/A_30285/article.html
http://www.radioland.net.ua/sxemaid-145.html
http://www.geofex.com/Article_Folders/voxamp/voxprot.htm
**broken link removed**
http://cxem.net/sound/amps/amp20.php
**broken link removed**

thanks 10000X