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Yaesu FT-223, Operation

The Yaesu FT-223 is a versatile handheld transceiver with advanced features for smooth operation. Get the user manual for free download at manualshive.com, and discover how to maximize the performance of this reliable device. Perfect for amateur radio enthusiasts looking for a comprehensive guide to using their equipment.

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Summary of Contents for FT-223

Page 1: ...he transceiver is designed to operate rom a 13 5 Volt lOo o DC negative ground power source CRANSMITTER SECTION Che transmitter section produces an FM phase modulation method Jutput signal Che audio s...

Page 2: ...s voltage is applied to 0119 for normal operation Without proper tone signal Q504 conducts removing the prc bias from 0119 to disable the audio circuit As the conventional carrier squelch circuit is o...

Page 3: ...DC voltage 15 2SC372Y conducts with the DC voltage applied through VR209 uaing Q216 2SC372Y to decrease its collector current Thus e emitter voltage of Q217 2SA496 0 is lowered causing Ql D313 to dec...

Page 4: ...ansformer L203 he audio signal from Q202 varies tl1 e bias applied to DZO l and 202 in turn causing the capacity of the diodes to vary in accordance rith the audio voltage As D201 and T201 and D202 an...

Page 5: ...P1 1 Tc n J TeJOI J ZJ oP L J N J QIOI 3SK l0 PB 538 C RX I 0115 2SC372Y 0102 3SK40 Oil6 2SCI04 7 0117 2SC1 04 7 l l l l l l l l l l l l l l 0205 2SC372Y 010 3 0202 2SC372Y L 0 J JDNJ70R 1Jf1 oJI Down...

Page 6: ...NJ J _ ICJ zvtJ1i r r NOTES l ALL RES1STORS IN n 1 4 11 10 UNLESS OTHERWI SE NOTEO 21lLL CAPACITORS IN F UNLESS OTHERWISE HOTEO 16 IIV FT 223 CIRCUIT OIAGRAM AN7 Downloaded by RadioManuai EU...

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