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Old 13th August 2008, 11:35 PM   #1
joka22 is offline joka22  United Kingdom
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Default 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
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Old 13th August 2008, 11:56 PM   #2
lineup is offline lineup  Sweden
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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
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Old 14th August 2008, 12:01 AM   #3
lineup is offline lineup  Sweden
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is this the guide:
http://www.audiosector.com/nigc_kit-users_guide.pdf
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Old 14th August 2008, 12:09 AM   #4
lineup is offline lineup  Sweden
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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
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File Type: png single_bridge.png (14.2 KB, 354 views)
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Old 14th August 2008, 12:37 AM   #5
DC Dave is offline DC Dave  United States
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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.
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Old 14th August 2008, 12:44 AM   #6
joka22 is offline joka22  United Kingdom
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i am using toridal transformer from air link300va 2x22v still waiting for it to arrive.
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Old 14th August 2008, 12:52 AM   #7
lineup is offline lineup  Sweden
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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
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Old 14th August 2008, 01:24 AM   #8
r8833 is offline r8833  Canada
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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
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Old 14th August 2008, 01:54 AM   #9
joka22 is offline joka22  United Kingdom
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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.
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Old 14th August 2008, 01:57 AM   #10
lineup is offline lineup  Sweden
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up your face
yes, can happen Explosion!
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