The primary winding of the power transformer for powering the radio receiver circuits has 1200 turns.
| December 2, 2020 | education
The primary winding of the power transformer for powering the radio receiver circuits has 1200 turns. How many turns should the secondary winding of the transformer have to power the kenotron (required voltage 3.5 V)? Mains voltage 120 V.
Given:
U1 = 120V
U2 = 3.5V
N1 = 1200
Find: N2 =?
Decision:
N1 / N2 = U1 / U2 = E1 / E2 = k
N1 / N2 = U1 / U2
N2 = N1 * U2 / U1
N2 = 1200 * 3.5V / 120V = 35
Answer: N2 = 35 V
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