Kenwood TK-230 Service Manual page 34

SEMICONDUCTOR DATA
L71-0244-05: MCF (IF unit XF2) L72-0373-05: Ceramic filter (IF unit XF1)
Item Rating Item Rating
Nominal center frequency (fo) | 21.400MHz Nominal center frequency 455kHz
Pass bandwidth fo +7.5kHz or more at 3dB
(— 20°C ~ + 60°C)
Attenuation bandwidth fo £25kHz or less at 40dB
85dB or more within fo + 1MHz
3dB bandwidth
+£7.0kHz or more
6dB bandwidth +10.0kHz or more
70dB bandwidth
+20.0kHz or less
Guaranteed attenuation Ripple 3dB or less (455kHz + 7kHz)
Spurious: 40dB or more - —
, Guaranteed attenuation 70dB or more within fo + 100kHz
- Spurious 40dB or more within 0.1 ~1MHz .
Insertion loss 2.5dB or less -
— insertion loss 4dB or less
Terminal impedance 1.6k0Q/1pF - -
Terminal impedance 1.5kQ
M67755L/H: Power module (TX-RX unit IC2)
: Input
: Pre drive +B
: Base bias +B
: Final +B
: Output
: GND (Fin)
aOaeawhy =a
m7
* Maximum rating (Tc = 25°C)
= ° Item Symbol! Condition Rating [Unit
a a I l | Power supply voltage Vec _ 10 Vv
; | Bass bias voltage Vbb - 7 Vv
DC current [eter _ 4 A :
Seo 4 Input power Pin | 2g=Zl=500 4 mw
Output power Pout | Vects7.2V 10 Ww
Operation temperature |Tc (op) _ —30~ +4110) °C
Storage temperature Tstg _ -—40~ +110] °C
- Electrical characteristics (Tc = 25°C)
7 M67755L M67755H .
{tem Symbol Condition Min | Typ | Max | Min | Typ | Max Unit
Frequency range 134 | — ; 150} 150 | — | 174 | MHz
Output power Po 75 |78| —~ | 75/78] — Ww
Total efficiency n Vec=7.2V 45 | 48 — | 4 | 48 4 — %
2nd spurious Vbb = 5V _ — |-25} — — |-25] dB
3rd spurious Pin=2mW _ — |-30; — — |-30] dB
Input SWR
pin Zg=Zi=509
| — | — | 25} —
| — | 25] —
|
Output SWR pout — i156; —]— [1s] -[- :
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