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BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 and 2 are circuit diagrams showing an
embodiment of the present invention, respectively. ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 咤 廖
ΑΑΑΑΑ 繊 傳 傳 傳 册 册 傳 魁 ぃ 傳 粥 ΑΑΑΑΑΕ 錺 ぅ 筌 譽 傳 魁 ぃ 傳 粥 ΑΑΑΑΑΕ
錺 ぅ 筌 譽 傳 魁 ぃ 傳 粥 ΑΑΑΑΑΕ 錺 ぅ 筌 譽 傳 魁 ぃ 傳 粥 ΑΑΑΑΑΕ 錺 ぅ 筌 譽 傳 魁
ぃ 傳 粥 ΑΑΑΑΑΕ 錺 ぅ 筌 譽 傳 魁 ぃ 傳 粥 ΑΑΑΑΑΕ 錺 ぅ 筌 譽 泪 ぅKanei Hiroya ■■
Ayase ぅ ■ 璽 ■ 1 Figure-25-True Opening 50-109 512 (2)-26
DETAILED DESCRIPTION OF THE INVENTION This invention relates to a radio receiver with a
wireless microphone. When combining an ordinary radio receiver and a wireless microphone-for
flight C, turn the focus of the radio / audio receiver tuning station 9 with the wireless
microphone Q, and use the wireless microphone's excavating frequency with one tone C If you do
not do it carefully, you may receive spurious radio waves from a wireless microphone. 1 The
purpose of this invention is to use the prior art described above. It is an object of the present
invention to provide a radio receiver provided with a wireless microphone capable of
automatically receiving radio waves of a wireless microphone by the operation of a changeover
switch. The feature of this device is necessary as a radio receiver. Connect another tuning circuit
set to receive radio waves from the wireless microphone in series with the two tuning circuits on
the antenna side and the circumference transmitter side, and switch these two tuning circuits as
required. The point is to switch by the switch. The invention will now be described by means of
an embodiment shown in FIG. In the drawing, 4 is a receiving antenna, 5 is an amplifier, Q1 is an
antenna-side radio tuning circuit, 6 is a mixer, 7 is a local oscillator, Q2 is a tuning circuit for a
radio receiving local oscillator, 8 is an intermediate frequency It is an amplifier. Q3 is treated in
series with the tuning circuit Q1 with an antenna-side tuning 217 翫, J ° 2 ° 1 circuit for a
wireless microphone. Q4 is a local oscillator tuning circuit for a wireless microphone, and is
connected in series to the tuning circuit Q2. 3F is a changeover switch, 1 to 3 and 1 'to 3' are the
contacts. In the above configuration, when the changeover switch 3F 'is moved in the B direction
to connect the contacts 2.3i and 2.3, the tuning circuit Q3. Q4 is shorted and this receiver has a
variable capacitor CV1. The tuning frequency can be varied by CV2 to operate as a normal radio
receiver. Next, moving changeover switch y in the A direction to connect contacts 1 and 2 2 1 ',
tuning circuit Q1. Q2 is shorted, and tuning circuit Q3. Receive radio waves of the frequency
determined by Q4. Therefore, tuning circuit Q3. If the tuning frequency of Q4 is matched to the
oscillation frequency of the wireless microphone -C, it is possible to always receive radio waves
of the wireless microphone by moving the changeover switch SF in the A direction. As described
above, this device switches the changeover switch, and can immediately receive the oscillating
radio wave of the wireless microphone with た け 操作, and its operation is extremely easy, andand it loses the stability of the radio, and it aims at cheaply. Have the effect of being able to
FIG. 2 shows another embodiment, in which switching is performed with a direct current by the
switching diode D and the changeover switch 3V.