咨询各路高手关于收音头什么样的好?

blueh

[s:17]

smlm

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下面是引用blueh于2004-11-2 2:34 PM发表的 :
[s:17]

这是? [s:8]

blueh

下面是引用smlm于2004-11-8 10:42 AM发表的 :

这是? [s:8]

IC-R20 - Specifications - GENERAL  
• Frequency range : 0.150-1304.999, 1305.000-3304.999MHz*
  (* Cellular blocked in the U.S.A. version.)

France:
   0.150-29.999, 50.2-51.2, 87.5-108, 144-146, 430-440, 1240-1300MHz

Dualwatch VFO A:
   0.150-469.999MHz (LSB, USB, CW, AM, FM, WFM modes)

Dualwatch VFO B:
   118-174.999, 330?1304.999MHz (AM, FM, WFM modes)  
• Mode : LSB*, USB*, CW*, AM, FM, WFM (* 0.150–469.999MHz)
• No. of memory channels  : 1250 (1000 regular, 50 scan edges and 200 auto memory write)
• Tuning steps : 0.01, 0.1, 5, 6.25, 8.33*, 9*, 10, 12.5, 15, 20, 25, 30, 50, 100kHz
   (* Selectable depending on operating bands.)
• Antenna impedance : 50Ω BNC
• Battery requirement : BP-206 or 3xAA(R6) alkaline cells
• External power supply : 6.0V DC ±5% (with BC-149A/D, CP-18A/E)
• Current drain (at 3.7V DC)
(Single receive, IC rec. OFF) : Rated audio
  Standby
  Power save 150mA typ. (Backlight off)
100mA typ. (Backlight off)
35mA typ. (duty=1:4)

• Operating temperature range : -10°C to +60°C; +14°F to +140°F
• Dimensions (With BP-206)
(projections not included) : 60(W) × 142(H) × 34.8(D)mm; 23/8(W) × 519/32(H) × 13/8(D) in.
• Weight (approx.) : 320g; 11.3oz (With antenna and BP-206)

RECEIVER
• Receiver system : Triple conversion superheterodyne + down converter
• Intermediate frequencies  : 1st 266.7MHz, 429.1MHz, 2nd 19.65MHz, 3rd 450kHz
• Sensitivity
(except spurious points; single receive): : FM(12dB SINAD)
   1.620 - 4.999MHz    0.56µV
   5.000 - 221.999MHz    0.4µV
   330.000 - 832.999MHz    0.56µV
   833.000 - 1304.999MHz    0.71µV
   1330.000 - 2304.999MHz    5.6µV
   2330.000 - 2999.999MHz    18µV

  WFM(12dB SINAD)
   76.000 - 108.000MHz    1.8µV
   175.000 - 221.999MHz    1.8µV
   470.000 - 769.999MHz    2.5µV

  AM(10dB S/N)
   0.495 - 4.999MHz    2.2µV
   5.000 - 29.999MHz    1.4µV
   118.000 - 135.999MHz    1.4µV

  SSB, CW(10dB S/N)
   0.495 - 4.999MHz    0.4µV
   5.000 - 29.999MHz    0.25µV
   50.000 - 53.999MHz     0.25µV
   118.000 - 146.999MHz    0.25µV
   330.000 - 469.999MHz    0.32µV


SSB, CW  
AM, FM  
WFM
• Selectivity : More than 1.8kHz/-6dB
  More than 12kHz/-6dB, Less than 30kHz/-60dB
  More than 150kHz/-6dB
• Audio output power (at 3.7V DC) : 0.1W typ. at 10% distortion with an 8Ω load
• External SP connector : 3-conductor 3.5 (d) mm (1/8")/8Ω

blueh

  IC-R20 是一部双频接收机，可接收一个频段同时扫描另一个频段
接收频率范围是 0.150-3304.999MHz （也就是从150kHz———3.3GHz）
接收的方式有（SSB）- LSB, USB, CW, AM, FM, WFM
支持CTCSS, DTCS对讲机的亚音调制接收
可预置存贮1250个接收频率
可以用内部的芯片录音约240分钟
能够显示信号强度分布柱状图
可外接电源和天线，有外接扬声器输出，电池可维持11小时接收

kako

先锋!!!!

smlm

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下面是引用八爪蟹于2004-11-11 9:37 PM发表的 :
玩个好的YAMAHAT1

我去市场寻寻......多谢!

最好是买到中道的收音头

mylujian

收音头我见过很多,天龙的TU1500AE是我见过最好的,音质不错,高频头采用一体化封装,双珊场效应做高放,高频采用了三四级选频,真是难得,特向各位介绍.需要可联系13760383703,只有三台了,机会再不来了

KUANGREN

收音头很好听，我的健伍 1100SD，和我的欧博120M PK可以说就是秒杀，CD居然这样的垃圾。