在网上看了许多9001的介绍，有人说物美价廉，有人说是垃圾，现摘抄部分如下：alan9001 10米全模式机试用情况
刚拿到航空寄来的alan9001， 机器是通过航空寄出，大概2天时间，
六个机器一箱。付一张十几元的室内送货费，没有邮寄费用，所以不
清楚花了多少邮费。
外包装是原厂的包装箱。产地中国，可能是由国内工厂生产然后外销
的。每个机器原厂包装，包装完整全新，打开后，主机和话筒，电源
线，安装附件及说明书。说明书为英文和xx文（该文不认识）两种。
机器体积大概在706差不多大小，后部为5cm宽的散热器，天线（sl16
）和电源及key等插口。
开机后，液晶屏非常清晰，并有两种亮度可调。
实际通连后，觉得该机在fm下，接收发射均不错。 ssb下，发射音质
干色（大问题），但接收还可以。可能是话筒的问题，有机会的话换
个话筒试试。或者改进下话筒放大电路。话筒方向性挺强，如果不是
正对话筒的话，语音很轻。
喇叭位于机器下部，但实际用下来发现喇叭共振腔作的不好，直接放
在台面上压住喇叭反而比直接架空声音要好，建议改进下，比如在机
器内部喇叭上加些吸音棉等。
在ssb方式下，发现功率好像不受功率电位器控制， 基本都是全功率
发射。 fm下功率可以基本由0到10w连续可调，rit功能很敏感，稍微
转动下，频率就有很大变化。
我的这台机器频率大概偏低了200hz，不过该机可以最小100hz调节频
率，所以基本不影响使用。本想通过改变下基准频率调校下，但打开
机器和分析电路均未发现可调整的地方，也可能是我看漏，也麻烦各
位有该机的也来分析下，看看可以做些什么改进使其更加完美。
总的来说，我个人认为，该机设计，外观，软件可以打90分以上，但
内部用料和安装，调试最多只能70分。可能是国内小厂生产的结果。
所以个人认为物有所值。望各位大家一起来讨论下，分享下经验，使
起更加完美！
祝身体健康，万事如意！ 73！
张 璟(王景)
bg4agr
中国 上海
e-mail:
bg4agr@sina.com ,
bg4agr@21cn.com homepage:
http://radiostar.126.com, http://www.qsl.net/bg4agr揭穿9001机的秘密！！！
揭穿9001机的秘密！！！（不信你看看图纸就清楚了）
最近，有位朋友拿来一部9001机让帮忙修修，开机后测试发现以下问题：
1-频漂大（使用hp的频谱仪测试结果）
2-边带滤波器是lc结构的（带宽根本无法保证），想收到信号难啦！
3-当am收音机还可以。
4-价格上永远的法则：便宜没好货，好货不便宜！！！！
在ssb工作状态下，边带宽度使用hp频谱仪测试严重超标达7-11khz；载波抑制度9-12db，无委会检测肯定过不去的（干扰大禁止使用）。你说性能不是零是什麽。
国外网站报道：
alan 9001 cb-radio
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alignment procedure
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pll and carrier oscillator portion
test equipment required:
power supply: 13,8 v oscilloscope frequency counter dc voltmeter
preparation alignment:
pa sw off
rit middle position
mode am
frequency 28.000 mhz
step condition adjustment procedure
1 am
rx connect the oscilloscope and frequency counter to tp. adjust for 6.200 mhz +/- 20 hz
2 am
rx connect the oscilloscope and frequency counter to tp. adjust for 38.6950 mhz +/- 20 hz.
check:
usb : 38.6975mhz
lsb : 38.6925mhz
3 am
rx connect the dc voltmeter to tp. adjust for 6.5 v +/- 0.1 v
4 cw
rx connect the oscilloscope and frequency counter to tp. adjust for 10.695 mhz +/- 20 hz
5 lsb
rx connect the oscilloscope and frequency counter to tp. adjust for 10.6925 mhz -40 hz to + 0 hz
6 usb
rx connect the oscilloscope and frequency counter to tp. adjust for 10.6975 +/- 20 hz
7 usb
rx connect the oscilloscope and frequency counter to tp. adjust for 38.6975 +/- 20 hz
band frequency range (without modification)
a 28.000 to 28.4999 mhz
b 28.500 to 28.999 mhz
c 29.000 to 29.4999 mhz
d 29.5000 to 29.699 mhz
output frequency from pll-pcb to analog-pcb
fvco = f + 10.6950mhz + a
f = transmitting and receiving frequency
fvco = vco output frequency
a = 0khz for cw/fm/am
a = +2.5khz for usb
a = -2.5khz for lsb
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alignment procedure
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transmitter portion
test equipment required:
power supply: 13,8 v af ssg rf vtvm dc am-meter
af vtvm fm linear detector oscilloscope rf power meter
dummy load, 50 ohm
preparation alignment:
clockwise
counter clockwise
clockwise
swr/cal clockwise
rf gain middle position
pa sw off
indic sw rf
mic gain sw off
rf power max.
frequency 28.000 mhz
step condition adjustment procedure
1 usb
no mod. remove the pcb between tp101, tp102 and tp103 from main pcb. connect a dc am meter to tp (+) and tp (-). adjust driver for 50 ma reading on the dc am meter.
2 usb
no mod. remove the pcb between tp101, tp102 and tp103 from main pcb. connect the dc am meter to tp (+) and tp (-). adjust finale for 50 ma reading on the dc am meter
3 usb
1 mv mod. connect a rf power meter to ant.jack. connect a rf vtvm, an oscilloscope and an rf linear dectector across an dummy load to the rf power meter. adjust for maximum reading en the rf vtvm. during this step, set the af oscillator so that the output is less than 20 v. repeat this step two times.
4 usb
30 mv mod. adjust xxx for 32.5 v reading on the rf vtvm.
5 usb
30 mv mod. adjust mod bal so that the carrier leakage at usb and lsb become minimum and almost equal.
6 cw
no mod. connect a sw between pin 8 and 9 of acc connector. when turn on the sw, adjust for 21 watt reading on the rf power meter.
7 am
no mod. adjust cw pwr for 10 watt reading on the rf power meter
8 am
no mod. s-meter adjust s-meter so that "9" lcd just light on.
9 am
1 khz 30 mv mod. am mod adjust am mod to obtain the 85% negative reading on the oscilloscope.
10 am
1 khz 1 mv mod. rf meter indic: mod. adjust rf meter so that "9" lcd just light on.
11 fm
1 khz 30 mv mod. fm dev adjust for +/- 3 khz deviation on the fm linear detector.
12 cw
no mod.
vol.: max. cw pwr connect an af vtvm across a dummy load (8 ohm) between pin 1 and pin 2 of acc connector. when turn on the sw, adjust cw pwr for 0.4 v reading on the af vtvm.
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alignment procedure
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receiver portion
test equipment required:
power supply: 13,8 v dummy load 8 ohm af vtvm oscilloscope
hf ssg: 28.000 mhz 1 khz 30% mod.
preparation alignment:
nb sw off
pa sw off
beep sw off
volume max.
rit middle position
mode am
squelch min.
dx/loc dx
frequency 28.000 mhz
step condition adjustment procedure
1 am
ssg 40db
1 khz mod. alignment of sensitivity. adjust coils for maximum reading on the af vtvm.
2 am
ssg 66db
1 khz mod. alignment of squelch. set squelsch to maximum. adjust vr102 so that the squelch just breaks.
3 am
ssg 46db
no mod. alignment of s-meter. adjust so that "9" lcd just lights on.
4 fm
ssg 1 mv
1.5 khz dev. adjust for maximum reading on the af vtvm.
5 am
ssg 1 mv
noise gen. adjust for maximum reading on the af vtvm. noise generator output: 50 hz sq wave 2 v p-p.
microphone connection
pin description
1 microphone
2 ground
3 tx key (connect to ground)
4 program up (connect to ground)
5 program down (connect to ground)
究竟如何，请已经用过并且拆开分析过实际测量过的朋友发表意见！
