[Scorpio(DDMF)]

I want to build the CMOY portable headphone amp, but I can’t seem to pass the “Parts” table

Can someone post partlist for this version of the amp ?

http://tangentsoft.net/audio/cmoy-tu...ayout-0150.pdf

THX

 

[jpelg]

http://tangentsoft.net/audio/cmoy-tutorial/parts.html

 

[superjohnny]

To get to the layout you must have seen the parts page. Which parts are you having trouble figuring out?

I used:
* 470uF 25v input caps
* 0.1uF full sized film cap
* 1k ohm for the gain (which is too much... 2-2.4K ohm would have been better IMO)
* All Vishay Dale resistors
* OPA2132PA op-amp (socketed... definitely)
* SPDT switch
* mint tin enclosure

I designed it to use 2 9v batteries (by using 25v input caps), but I didn't build it small enough to actually fit the two jacks, switch, LED, and two batteries. It takes some skill and practice to do that.

 

[Scorpio(DDMF)]

Quote:

Originally posted by superjohnny To get to the layout you must have seen the parts page. Which parts are you having trouble figuring out? LED, and two batteries. It takes some skill and practice to do that.

I used:
* 470uF 25v input caps
* 0.1uF full sized film cap
* 1k ohm for the gain (which is too much... 2-2.4K ohm would have been better IMO)
* All Vishay Dale resistors
* OPA2132PA op-amp (socketed... definitely)
* SPDT switch
* mint tin enclosure

I designed it to use 2 9v batteries (by using 25v input caps), but I didn't build it small enough to actually fit the two jacks, switch,

My English isn't so good

(I'm from Serbia and Montenegro) so I didn't understand what the autor ment by "this cap is from the power supply, and this one isn't the same it's from the amp part" and so on..

I just wanted to get a simple partlist for this version of the amp like: c1 is 1200mF, C2 is 470mF etc.

Please post resistor, cap and other part values...

THX

 

[Budgie]

the original article will be of help-
http://headwize2.powerpill.org/proje...=cmoy2_prj.htm

 

[superjohnny]

Ok here you go...

C1 & C2 470uF 35v
R1 & R4 10K ohm resistor
C1 0.1 uF 50+v full sized film cap.
*don't confuse the 470uF C1 with the 0.1uF C1* look here and pay attenetion to the 4th picture
R2 & R3 4.7k or 4.75K Ohm resistor
R2 100k ohm resistor
R3 2.0k ohm or 2.2k ohm resistor
*note* this is for gain. Higher the value of this resistor the less volume the amp will put out. *It resists more*

I like a gain of about 5 or 6 so any resistor between 2.5kohm and 2kohm will do nicely.

Does that help?

 

[Scorpio(DDMF)]

Quote:

Originally posted by superjohnny Ok here you go... C1 & C2 470uF 35v R1 & R4 10K ohm resistor C1 0.1 uF 50+v full sized film cap. *don't confuse the 470uF C1 with the 0.1uF C1* look here and pay attenetion to the 4th picture R2 & R3 4.7k or 4.75K Ohm resistor R2 100k ohm resistor R3 2.0k ohm or 2.2k ohm resistor *note* this is for gain. Higher the value of this resistor the less volume the amp will put out. *It resists more* I like a gain of about 5 or 6 so any resistor between 2.5kohm and 2kohm will do nicely. Does that help?

Yes it does

THX