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Old 13th September 2013, 07:49 PM   #1
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Default 2n3055

I have a 10pcs of 2n3055 ...can you help me build a amp pls..
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Old 13th September 2013, 08:32 PM   #2
wg_ski is offline wg_ski  United States
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Didn't we just do that... like last week?
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Old 14th September 2013, 02:32 AM   #3
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The internet is full of circuits, lame and good for 2N3055 transistors. DIYs have been building amplifiers with these for over 40 years. My first was in 1971 and there has never been a shortage of designs, kits and finished products and plenty enough schematics already on the web.
Using the "search this forum" button at the top of the page, you can look for threads with keywords like "2N3055 amplifier" to find designs already here or google them from the web. You can post in that thread if you want to ask questions but there's no need to keep on reinventing the wheel or duplicating threads.

Beware of designs recommending +/- rail voltages over 35V. Standard 2N3055 transistors will fail at full power with such voltage unless the supply is weak and droops to a safe level under load.
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Old 14th September 2013, 04:13 AM   #4
tomchr is offline tomchr  Canada
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They're excellent as pass transistors in linear power supplies. I suggest you build a lab power supply....

Modulus-86: Composite amp achieving 0.000067 % THD. Damn Good 300B, Novar Spud, 21st Century Maida Reg., Filament Reg., etc.
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Old 14th September 2013, 09:20 AM   #5
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You can build a Circlophone... but you'll only need four for that. Highly recommended.
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Old 14th September 2013, 09:38 AM   #6
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Another example here (see DP0108 project - there, you can replace 2SC5200 with 2N3055):
~50 Watt Amp for a Beginner

If you want more DP project (DonPetru projects) see here:
"donpetru" projects - Comunitatea Tehnium Azi
AV400v2 and GX400 audio amplifier projects
PCB Design Services - for prototypes OR serial products, Today Tehnium and Forums
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Old 14th September 2013, 08:11 PM   #7
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Considering all the money that goes into an amplifier for the transformer, heatsink, reservoir capacitors, case, PCB, etc. it does not make much sense to skimp on output transistors. Unless you already have most of those in your parts bin as well, rather get modern transistors.
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