## how to make a toroidal transformer:

At first, we have to take decisions that how many watts of transformer we need. Take the core for the transformer according to watts. how to make a toroidal transformer.

if our core area is 20. needs the ampers is 800 Watts. now we need to calculate. which wire do we need to use?

**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 which Gauge you need?

Calculating the gauge according to our amplifier Watts. Our amplifier Watts is 800. And the input voltage is 110. So 800/110=7.27Amp wire is needed. Or our input voltage is 220. So 8oo/220=3.36amp wire has to use.

## 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 finding 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 of 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 about where you use the transformer. here we are using this transformer for an amplifier

so we must think about how many amperes need to run this amplifier. here this amplifier used transistors 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.

## Let’s Watch the video on How to make the transformer?

transistor circuit diagram of 2sa1943 and 2sc5200

Build a Transformer or construct the transformer. home theater circuit diagram 5.1

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