Just wanna simulate this circuit for today..and i still figure out the circuit for stability

wui,
Save it for our TT session?
I just reassembled my CD transport today. The intentions is to build a proper casing for it.. now that I have a longer weekend. Been putting it off for awhile. Just acquired another CDROM controller and some tubes. A buffer for the CDP is on the way..

Just bought a MOSFET power amp kit. Going to assemble it in the next few days.

i see on internet, Audinst HUD mx1 required 12-15v adapter, just buy any adapter with 12VDC 1A at JP, it will work ok, inside Audinst HUD mx1 already have Linear voltage regulator IC KIA278R12PI, it work same as 78xx as use in "The σ25 Regulated Power Supply", but technically KIA278R perform better than 7812. for better regulated voltage i think better find 15VDC 1A adapter

yes.. the output stage is class A operation... LM317 works as constant current sinking...

my previous project also use this output topology, but use transistor instead of op amp.. fed back to emitter
i think.. got mistake on this diagram.. check the R1.. "Adj" should be connected directly to "Out"  and then tied together to R1.. R1 to gnd

Hi,

This is my current project. I intend to use it as a headphone amp.

Has anyone used this topology before?  I was wondering if there is anything that I should look out for.

Also, was wondering if this counts as class A.

Thanks

Hi,

I hope you guys don't mind me tumpang this thread but there doesn't seem to be a general electronics DIY thread on LYN

I am looking for this transistor to repair my PC motherboard.
Its an Alpha & Omega Semiconductor T0-252 D438
[attachmentid=2265555]

I've already asked several shops in Jln Pasar but it wasn't available.

oops sry for my newbness budget around below rm 600 like dat?

im a freak of vocal , soundstaging and smoooth highs,

Checked Mouser, RS, Element14 - nada!
It is!
Datasheet here:-
AOD438 Datasheet

It's on an Acerpower 1000 - one of those small baby sized pc.

where can i buy AD797BRZ x 2 on BD??

yes do u have any idea?

Thanks, y haven't you guys added the stuff there in the first post. Lots of good reading there. I decided to pick up a Cmoy kit first (if i manage to find one), juz for practice my soldering n mess around with few op-amps, then maybe move on to bigger things

edit: i'm thinking of getting this http://cgi.ebay.com.my/Banzai-V2-CMOY-Head...=item4aadfacd30 but i'm not sure about the op-amp. Rarely hear ppl talking bout it. Issit worth it to get this now n juz switch the op amp to let's say 2227 in the future?

Anyone with an extra ALPS pot to let go?
My pot is about to fail.

Any size/model. PM the price.

Wanna ask sifu-sifu here. I'm new to the DIY world. My first project is to replace the capacitors in an amplifier. I wish to get some recommendations for the capacitors for the replacement. The amp I'm using is hybrid tube type. Got 4 220uf 400v (for Psu I think), a few 47uf 16v and a few 22uf caps. I guess blackgate are hard to come by. Is Elna silmic ii good? How bout the big fat Psu caps? What caps are recommended? Availibities wise? Many thanks in advance.

I'm not sure and they are very old. I have heard Elna silmic are good. But they are hard to get? Also got advise for some panasonic FCs. I think I will go for the FCs. I would probably go for FC. But now the problem is with the Power supply caps, which needs 100uF 400v which are not available for FC series. Are they going to affect the quality alot if I use the ED/EE type from panasonic or any other recommendations? Anyone here can source the Elna caps if they are available?

Thanks for the recommendation. But is higher value of voltage ok better than the original ones?

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Added on October 17, 2011, 2:58 pm
Thanks for the recommendation. But is higher value of voltage ok better than the original ones?

Hello guys.. I'm new to DIY amplifiers and i saw this circuit (http://williamneo.blogspot.com/2008/03/most-simply-diy-instruction-on-cmoy.html) which looks fun and simple to make.. I don't know a thing about op-amp  ... I see this circuit uses the OPA2227 but can i replace it with MC1458, LM358 or TL072 which is easier for me to get ?  I know i can get the 2227 at element14 .
Just answer the one in bold 

Thanks in advance..

Ok.. thanks for the links... 

Now i got 1 more question... What's the difference (performance) between this http://williamneo.blogspot.com/2008/01/diy...lifier-for.html and this http://williamneo.blogspot.com/2008/03/mos...on-on-cmoy.html if using the OPA2227...? Why does one use 1x9v while the other use 2x9v ?

Wow.. Now i know what's the -V and +V for.. 
Ok, so i decided to go with this and change the virtual ground circuit to the TLE2426 based..  one more question, how is the ground connected to the pot?
is it like this? (open spoiler)

Had some problems with my Cmoy on a stripboard , so I decided to make another one using a breadboard and it worked.. Then, I soldered all the components on a new stripboard and still had problems  . After touching the circuit, shaking up and down, moving here and there, and brushed the flux off with a little bit of water; it finally worked.  I abandoned the TLE2426 as it was causing me problems too (bad soldering) and used the resistor divider instead (470uF). This Cmoy uses a TLE2072 op-amp, 0.15uF input caps, 2kΩ resistors (gain 6), 2x10kΩ Pot (each controlling one channel). My Cmoy can be powered either by battery or AC-DC adapter (controlled by switch). The AC-DC jack on the Cmoy is connected to the resistor divider through a Voltage Regulator which throws 12V as the output while the battery jack is connected straight to the resistor divider. Enjoy the photos... 

I like my wires    No one is gonna open and see it when listening to it haha  Actually all my problems were noises.. I manage to get rid of the noise on my final product.. I only have a slight noise (only at high volume, which i don't really reach that high) when it is powered by the ac-dc adapter.. The battery power is silent 

Ooo.. So that's what cause the noise at high volume.. Does the voltage regulator that i built reduce the noise (all i know is it makes sure it outputs 12V)?

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Added on November 15, 2011, 11:45 pmEh bro, i just noticed something. When using AC/DC Adapter, and my source is my laptop, the noise is there when set to above listening volume. But when my source is my phone, i only hear the noise when volume is all the way up (max) on the amp. When my source is my ipod or no source, max volume also no noise  .. I'm guessing my power is not causing the noise now, but it's my source..