## how to make toroidal transformer core:

**How to make Toroidal transformer core: **Here in this Video you can learn how to make the toroidal transformer.

First, you have to take decisions that how many watts transformer you need. Take core for the transformer according to watts.

So your core area is 20 if your amp is 800 Watts. now you need to calculate how to know the wire turns and the gauge of the wire.

**Gauge………….=………………Ampere**

**7……………………………………44.2**

**8……………………………………33.3**

**9……………………………………26.5**

**10………………………………….21.2**

**11………………………………….16.6**

**12………………………………….13.5**

**13………………………………….10.5**

**14………………………………….8.3**

**15………………………………….6.6**

**16………………………………….5.2**

**17………………………………….4.1**

**18………………………………….3.2**

**19………………………………….2.6**

**20………………………………….2.0**

**21………………………………….1.6**

**22………………………………….1.2**

**23………………………………….1.0**

**24………………………………….0.8**

**25………………………………….0.6**

**26………………………………….0.5**

**27………………………………….0.4**

**28………………………………….0.3**

**29………………………………….0.29**

**30………………………………….0.22**

## How do you know that which Gauge you need?

Calculate the gauge according to your amplifier Watts and input AC voltage. If your amplifier Watts is 800 and input voltage is 110. so 800/110=7.27Amp wire you need. or your input voltage is 220. so 8oo/220=3.36amp gauge you need for primary winding.

## Now you need to calculate the Winding turn. How many turns do you need?

18cm2-8cm2=10cm2

10cm2x4cm2=40cm2

40cm2/2=20cm2 is the core area.

According to the calculation rules, 42 is the key to find out the turns per voltage

So 42/20cm2=2.1 turn per voltage.

as your input voltage. if 110volt.

110×2.1=231turn need.

Or for 220×2.1=484turn need.

## Calculation the sec wire turn and Gauge:

According to the Ampere. how many amperes do you need?

if you need 20 Ampere you need to use 10 number gauge.

Always think where you use the transformer. here we are using this transformer to an amplifier

so we must think how many amperes need to run this amplifier. here this amplifier used transistor 5200 and 1943.

now calculate the sec volt.

we need 35-0-35 volt

so 2.1×35=73.5 Turn need. we give 74 Turn in Double.

we give double because the transformer is a center tub transformer.

## Lets Watch the video How to make the transformer?

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