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-   -   my gainclone in build proccess need some help (http://www.diyaudio.com/forums/chip-amps/128090-my-gainclone-build-proccess-need-some-help.html)

joka22 13th August 2008 11:35 PM

my gainclone in build proccess need some help
 
Hi i have followed peter daniels build instructions on the gainclone but I have finshed the amp boards but I am stuck on the bridge rectifier,

I want to use the amp in the stereo mode with one rectfier, do i solder on all 8 mur860 diodes and caps 50v 10uf and i would like to use the amp with out vol pot.

here is a link of the bridge rectfier

http://img297.imageshack.us/my.php?i...ectiferfd6.jpg

here is a link of both amps boards attached to heatsink.

http://img368.imageshack.us/my.php?image=chipampyk3.jpg

lineup 13th August 2008 11:56 PM

Doesn't Peter Daniel instructions tell?

8 diodes may very well make one (1) bridge rectifier.

with one v+ and one v- output node

where can I download these build instructions?
and look for myself at the schema

lineup 14th August 2008 12:01 AM

is this the guide:
http://www.audiosector.com/nigc_kit-users_guide.pdf

lineup 14th August 2008 12:09 AM

2 Attachment(s)
Quote:

There are many different options for producing a power supply, but using the supplied diode bridge gives three main options when choosing a transformer.

A transformer with dual secondaries,
true center tapped secondaries
and two transformers with single secondaries.

The original standard application of this kit uses the first, a transformer with dual secondaries.

For this application, the primaries are attached to the mains,
while V+ and 0+ are attached to V+ and PG+
and V- and 0- are attached to V- and PG-.

Note that for a stereo amp,
one diode bridge can be used for both channels


or for monoblok applications, both bridges and two separate transformers can be used.
For the application of a true center tapped transformer, one with only three wires, V+, V- and 0, the following alternate arrangement can be used.

seems like you can use only one diode bridge = 4 diodes
for both channels = stereo

DC Dave 14th August 2008 12:37 AM

What transformer did you pick.

The way you configure the power supply board depends on the transformer you are using. If you are using a center-tapped transformer you will use 4 diodes, if you are using a transformer with dual secondaries you will use 8 diodes.

joka22 14th August 2008 12:44 AM

i am using toridal transformer from air link300va 2x22v still waiting for it to arrive.

lineup 14th August 2008 12:52 AM

DC Dave is right.
You should use all 8 diodes.
And use the instruction for dual secondaries transformer.

When we buy transformer we can get
2 x 22 VAC
2 x means it is two separate windings. Each on 22 VAC

Or we can buy/get
22-0-22 VAC
In this case is only one winding.
And in the middle of this winding is one connection to 0 Volt

r8833 14th August 2008 01:24 AM

peter has a permanent thread on how to build a gainclone ..its 2nd from the top..it has alot info.. has helped me out big time

joka22 14th August 2008 01:54 AM

I have been on peters daniels thread on the gainclone iwas making sure that i have everything wired up properly when i get my toriodal dont want a cap blown in my face. I noticed that certain people have used the 50v 10uf caps in rectifers and some have not which one should i choose for best performnace.

lineup 14th August 2008 01:57 AM

:D up your face
yes, can happen Explosion!


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