TECSUN 9700 12-BAND RADIO
 

I bought this Tecsun 9700 radio for $20 (RMB 160) in China.


Specifications:

Dimensions: 160 x 95 x 32 mm
Weight: around 300 g., not including battery
FM: 87.0 – 108.0 MHz
TV: VHF 2 – 12 CH.
MW: 525 – 1610 KHz
SW: 4.70 – 21.85 MHz (in 9 different bands, non-continuous)

Dual Conversion for SW: 1st IF 10.7 MHz, 2nd IF 455 KHz
Power: AA battery x 3 or DC 4.5V.


优点:
1.FM用耳机可收听立体声广播,

2.中波段的灵敏度高,我在广州使用时很容易地收到香港各中波电台,

3.短波有两次变频,灵敏度与选择性俱佳,我曾把它与7600G同用拉杆天线逐台作收听比较,7600G能收到的电台它都能收到,其灵敏度与7600G相约,但选择性略逊于7600G。在收听相隔5MHz的两个强台时不串台,但在收听相隔5MHz的一强一弱台时,弱台的信号略收干扰,

4.调谐旋钮采用较大的圆型旋律,比平面齿轮式的旋钮为佳,调谐手感良好,

5.波段内分布较宽,台与台之间不至于太挤迫,调谐频距较宽,有淡出淡入的感觉,选择电台时较为容易,

6.设有”远距/本地”收听选择开关,其实这是一个天线衰减选择开关,

7.不觉得有飘频现象,

8.性价比较高,是以同样的价钱能买到的最佳的短波收信机之一,适合初学收听短波者作为入门机,

9.包装精美,附有收音机套子,耳机及短波外接天线,

10.说明书详尽,附有接受播音常识及部份电台频率表,

11.喇叭采用宁波友声电子有限公司的UEC 0.5W, 25欧, 57mm的小喇叭,声音比口袋机宏亮,音调适中;当然若与1W以上输出功率的机子相比就大有不如了,毕竟是0.5W, 57mm的小喇叭。


缺点/待改善处:

1.没有天线输入接口,作为‘超级短波王’,天线接口是必不可少的!。我觉得天线接口是短波收音机的分水岭,有天线接口的才称得上是一部认真的短波接收器。一般而言,没有天线接口的收音机其短波接收性能都不怎么样,其实市面上有些多波段收音机的短波段只是作为装饰品,使产品看起来较高档,用来吓唬不熟悉者或满足部份买家的虚荣心,从而卖得较高的价钱!

2.FM的灵敏度略差,用耳机收听时噪音略大,

3.FM应设有立体声/单声道开关,相信这可减低嗓音,又或可用以DX接收,

4.因有TV波段关系,FM波段调谐困难,电台分布太挤迫,

5.其实TV波段可取消,我想信喜爱听广播或短波的人,不会对电视太沉迷,我是其中一例,

6.把取消TV波段的成本改为增设微调,这也是认真的短波接收器不可少的设备,

7.在听短波时,当调谐至某些频率时,有啸叫声现象,这情况各波段都有,分布很广。9700的小册子写道:‘在使用9700接收5.9033、6.2067、12.0025和21.870 MHz 频点附近的电台时,可能会收到本机内部振荡器的谐波,敬请留意。’

8.体积略大,合家中使用,可能这是此机的定位,外携时略嫌太大。


Performance : ****

Price / Performance Ratio : *****

Collectible Ratio: ***

***** = Excellent

**** = Good

*** = Fair

** = Not very good

= Poor


Note: As my radio collections grow larger and larger, I am making records of part of my collection by writing some notes and by taking some photos for the records and published here as Radio Photofacts series.These should not be considered as radio reviews, rather, just some basic information on some classical radios.I do this basically to amuse myself, I will be delighted also if you also find these records interesting.Your comments and suggestions are very welcome, thank you for reading.



December 3, 2001