Pavel Dudek's (Upupa Epops) LM4780 amp

[Upupa Epops]

Translation : Pavel says, that my question wasn't happili written... And my exlanation : I hope, that you take it only generally, without by-end...

 

[Bearman]

I'll guess I missunderstood a bit but it's true that I haven't got many questions abiut the amp but I'm sure there will be more when people start to build.

Well, I have a few.

D1/D2 are supposed to be 1.3W Zener, but I can only find 3w or 1w. Which to use?

Also the relay. Is this part the correct one for the speaker relays?

http://www.mouser.com/search/productdetail.aspx?R=RT314024Fvirtualkey65520000virtualkey655-RT314024F


Thanks

 

[Upupa Epops]

1.3 W zener are standard glass " diode " package and I doubt that you will din't find some similar type....

 

[Bearman]

1.3 W zener are standard glass " diode " package and I doubt that you will din't find some similar type....

The 1.3w are a little tough to find in the states. Mouser and Digikey don't have them in DO-41, but do in SMD type. The standard here is 1w, but that's maximum according to the datasheet.


I assume the 3w would be preferred? I bought both already, so it makes no difference to me.



Thanks for the boards. I can't wait to start on them.

 

[peranders]

1 or 1.3 W will do, one model larger than "small" ones.

 

[Upupa Epops]

For imagery of versatility this module, I can show you some pics, which send me my friend Andrew. It is module, which is used as driver in two way boxes, with build in active crossover ( designed by Andrew )...

 

[Upupa Epops]

Other look...

 

[Upupa Epops]

Other...

 

[Upupa Epops]

Advantage of double sided PCB....

 

[TetraoUrogallus]

And the final product is here:

 

[peranders]

Nice! How about the cooling Does it get hot?

 

[Upupa Epops]

I had make something similar for one my friend with this module, P-A... Also only straight aluminium plate at the back side ( 4 mm thick ) and no problems with cooling...

 

[TetraoUrogallus]

Back plate size is 6 dm^2. Temperature is after few hours of playing about 10°C above ambient. It has big reserve before overheating.

 

[PMA]

Tetrev hlusec !! 😀

 

[jacco vermeulen]

What is it with you Czech guys and Birds ?

btw:
does any of you Czech Chicken have the Audio Amatér 1/91-1 pdf ?
The one from the download section of CzechAudio seems to be Kaputt.

 

[chalkandtalk]

IC sockets

Hi all,
many thanks to Pavel and PA. This is my first power amp that I have tried to build and I'm really looking forward to it. 😀

At the moment I am trying to source the parts. I tend to buy from here:

http://uk.farnell.com/jsp/home/homepage.jsp

In the BOM it mentions two IC sockets and I don't know what these are. Please would somebody be so kind as to show me the necessary part at the above site.

Thank You

 

[Big Poppa]

DIL 16,you need 1 piece:
http://uk.farnell.com/jsp/Prototypi...MC-16-03-09-F1/displayProduct.jsp?sku=1103846
DIL 8,you need 2 pieces:
http://uk.farnell.com/jsp/Prototypi...MC-08-03-18-F1/displayProduct.jsp?sku=1103844

 

[chalkandtalk]

Big Poppa:

thanks for the information.😉

 

[Bearman]

Great job Pavel! Once I figured out the jumpers for the OP Amps, everything worked perfectly.

I'm using a cloned Lightspeed Attenuator with it and the sound is wonderful!

Thanks for your good work!

 

[Upupa Epops]

Do you have some photo ?