Bored...2n3055e amp?

ThSpeakerDude88 · 23rd March 2006, 05:32 AM

Hey I'm a little bored and got two of these lieing around, a couple of 4558's and 741's too. Would like to know if theres a simple amp I could build out of them.

Doesn't need to be powerful, a watt or more would be nice :-p

Netlist · 23rd March 2006, 07:25 AM

Have a look at Rod Elliott's site.
You will find many simple projects to make good use of these parts.

/Hugo

ThSpeakerDude88 · 23rd March 2006, 03:57 PM

alright, well I was hoping for something that ony used one transistor and an opamp, I could use a voltage regulator for bias. Any curcuits that could use this?

jaycee · 23rd March 2006, 04:09 PM

If you have two 2n3055's then you could build something with a quasi-complementary output. You would need two medium power transistors such as MJE340/350 as drivers though.

darkfenriz · 23rd March 2006, 04:50 PM

Quote:

Originally posted by ThSpeakerDude88
Any curcuits that could use this?

White noise generator.

ThSpeakerDude88 · 23rd March 2006, 05:20 PM

hah nice... I kinda meant amplifier circuits though

darkfenriz · 23rd March 2006, 05:31 PM

These parts are obsolete and it may turn out to be waste of time to build up something from these. For also very low price you will get tl07x or NE5532 op-amps, which are way better. Modern power trasistors will be probably something like 2$.
No need to use your old dirt whereas silicon costs nothing nowadays, main expense is transformer, heatsink and PCB.

forr · 23rd March 2006, 05:40 PM

Try something original. What about this one, dating from 1973 and due to P.L. Taylor ?

davidallancole · 23rd March 2006, 09:07 PM

Is this more what you are looking for? You could replace the darlingtons with what you have for transistors. It won't produce much power, but you said you wern't looking for much in the first place.

ThSpeakerDude88 · 23rd March 2006, 11:50 PM

nice, I think that will work.

If I set it up in multisim and test it will it give me close to accurate results? By the way... multisim looks very close to p-spice.. I downlaoded p-spice one time but I couldn't get it to work.

what voltage do the diodes need to be ( or are they not zeners?)

23rd March 2006, 05:32 AM	#1
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	Bored...2n3055e amp? Hey I'm a little bored and got two of these lieing around, a couple of 4558's and 741's too. Would like to know if theres a simple amp I could build out of them. Doesn't need to be powerful, a watt or more would be nice :-p

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23rd March 2006, 07:25 AM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Have a look at Rod Elliott's site. You will find many simple projects to make good use of these parts. /Hugo

23rd March 2006, 03:57 PM	#3
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	alright, well I was hoping for something that ony used one transistor and an opamp, I could use a voltage regulator for bias. Any curcuits that could use this?

23rd March 2006, 04:09 PM	#4
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	If you have two 2n3055's then you could build something with a quasi-complementary output. You would need two medium power transistors such as MJE340/350 as drivers though.

23rd March 2006, 05:20 PM	#6
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	hah nice... I kinda meant amplifier circuits though

23rd March 2006, 05:31 PM	#7
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	These parts are obsolete and it may turn out to be waste of time to build up something from these. For also very low price you will get tl07x or NE5532 op-amps, which are way better. Modern power trasistors will be probably something like 2$. No need to use your old dirt whereas silicon costs nothing nowadays, main expense is transformer, heatsink and PCB.

23rd March 2006, 11:50 PM	#10
ThSpeakerDude88 diyAudio Member Join Date: Jun 2005 Location: USA	nice, I think that will work. If I set it up in multisim and test it will it give me close to accurate results? By the way... multisim looks very close to p-spice.. I downlaoded p-spice one time but I couldn't get it to work. what voltage do the diodes need to be ( or are they not zeners?)