LYNX Amplifier question

[B.I.G]

Hello can anyone tel me if the LYNX Amplifier will work with darlingtons on the output ? Should i ommit Q110/Q111 ?

I have BDX66c/67C rated 120v 16A 150W .

Can i reach 150W/8ohm with 2 pairs at +/-60v ?

 

[B.I.G]

PS: the amp can be found here http://www.audio-circuit.dk/PDF/Schematic Design_ LYNX_v2-1E.pdf

 

[JensRasmussen]

Lynx

Hi,

First of all, I have told Jan that there is a question regardig the lynx amp out here on diy.

The transistors you want to use are rated for 120 Vce, this means that voltages above this will cause the transistor to fail, or in worst case breake down.

If you want to run the amp at +-60V I suggest you use transistors rated at no less than 200V 15A. These could be the 3281/1302 pair or their newer substitutes 1943/5200

Hope this helps you

\Jens

 

[Jan Dupont]

B.I.G

I've got your email, and have tried several times to email you, however my reply keeps bouncing back with "Mail Error Handler".

 

[B.I.G]

from where i`m form you can`t fiind good bipolars only fakes so it is very hard for me to go for a 200V rated device . I have seen MJ15003/4 amps going on +/-68V that`s 136V they are 140V . With my transformer +/-60V no load i can get about +/-58V .....🙁 soo ... there is a good chance it will work safe .... hope so. ...

 

[B.I.G]

Okay so i have only found ON MJ15022 rated at 200V , 250W

MY question is can i use only the MJ15022 NPN of course you would have to tell me what mods to do !!

How much will this affect the sound quality of the amplifier ? 🙄

 

[Jan Dupont]

The MJ15022 are just fine!
I don't think you will hear any difference at all using these substitutes... I can't hear it 😉

 

[B.I.G]

I didn`t express my self corectly !

I only found the NPN MJ15022 !! I couldn`t fiind the PNP MJ15023

I hope this amp can work with NPN only

 

[Jan Dupont]

No way!!!!
You can find a few amps using only NPN's, but not this one

 

[B.I.G]

It won`t work at all or it will just sound badly ?

 

[JensRasmussen]

NPN AND PNP output

Hi,

You must use both npn and pnp predrivers, drivers and output transistors for this amp.

It will not work using only one type!

\Jens

 

[B.I.G]

Of course i would put both npn and pnp predrivers and predrivers , i was only going to put NPN`s on the output without PNP`s .

Like this :

 

[Jan Dupont]

B.I.G

This amplifier`can NOT work with only NPN's or PNP's in the output stage!!!!!

My best advise to you is to drop the idea of building an amp like the LYNX (or similar), and then go for a SUMO, AMCRON/CROWN or QSC design using only NPN's in the output.

Thanks for your interest in the LYNX amplifier!

 

[B.I.G]

OKAY so i`m still going to make one with power darlingtons but at +/-40v so it will be about 100W/8ohm .

Thanks for the replys ! 😀

 

[Jan Dupont]

Yes do that 😉
You will get a dynamic and powerful amp, that sounds like 200 Watts...........

 

[B.I.G]

I have built the LYNX amplifier and it doesn`t work with darlingtons ! 🙁
The sound is full of distorsions !
If i put the MJE15xxx drivers the sound is better but still full of distorsions !
The amp works perfectly well as a amp 40W (R118/119=0.22ohm)
and giving 40W without distorsion !
Can you give me a complete modified schematic(in PAINT) to use with power darlingtons ?

 

[Jan Dupont]

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