Sharp R-22AT, R-24AT Two Magnetron Operation System, Figure B-1. High Voltage Circuit

R-22AT

R-24AT

48 sec. ON

Number key

44sec. ON

Number key 9

40 sec. ON

Number key 8

36 sec. ON

Number key 7

32 sec. ON

Number key 6

26 sec. ON

Number key 5

22 sec. ON

Number key 4

16 sec. ON

Number key 3

12 sec. ON

Number key 2

8 sec. ON

Number key 1

0 sec. ON

Number key 0

NOTE: The ON/OFF time ratio does not exactly corre- spond to the percentage of microwave power, because approx. 3 seconds are needed for heat- ing up the magnetron filament.

TWO MAGNETRON OPERATION SYSTEM

Two magnetrons MG1+MG2 are equipped in order to get higher microwave power output. The primary windings of the high voltage transformers T1+T2 are connected so that each magnetron can be oscillated alternatively ac- cording to the frequency of the power supply. Refer to the Figure B-1 and B-2.

	T2: HIGH VOLTAGE
	TRANSFORMER
	(REAR)
H. V. FUSE	H. V. FUSE
	C2: H.V. CAPACITOR
H. V. RECTIFIER	H. V. RECTIFIER

T1: HIGH VOLTAGE TRANSFORMER

(FRONT)

C1: H.V. CAPACITOR

MG2: MAGNETRON (LOWER) MG1: MAGNETRON (UPPER)

Figure B-1. High Voltage Circuit

OPERATION OF

MAGNETRON

COMMERCIAL FREQUENCY (50HZ)

POWER OUTPUT

BY MAGNETRON T1

POWER OUTPUT

BY MAGNETRON T2

Figure B-2. Operation of Magnetron

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