Warning: mysql_query(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 11

Warning: mysql_query(): A link to the server could not be established in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 11

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 11

Warning: mysql_query(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 20

Warning: mysql_query(): A link to the server could not be established in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 20

Warning: mysql_query(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 328

Warning: mysql_query(): A link to the server could not be established in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 328

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 329

Warning: mysql_query(): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 335

Warning: mysql_query(): A link to the server could not be established in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 335

Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/content/16/11852616/html/21say-com/wp-content/plugins/translate/translate.php on line 336
80mw无线话筒制作 | 骆驼调频
现在的位置: 首页 > FM > 正文
80mw无线话筒制作
2008年01月23日 FM ⁄ 共 338字 暂无评论 ⁄ 被围观 656 views+

80mw无线话筒制作

80mw无线话筒无件选用:

1.电容选用微型色码高频电容;
2.JT选用频率为49.860MHz的泛音式晶体;
3.L1、L2、L3为倍频及高频放大器谐振电感,建议选用Φ0.8mm镀银线在4.0mm骨架上绕制,匝数分别为5T、4T、5T;Vl、V2决定着高频级的噪声系数及增益,可选用β值在300左右的低噪管,如C945、C9014等;V3-V5要求β100-120间,fT>500MHz,C1975、C9018等均可择用。V6要求β=100,fT>800MHz,Pc>500mW的高频中功率管,如C2581、D40、C2053。TX可选用拉杆天线或1.5m软导线,当工作频率为100MHz时75cm长度为理想值。

80mw无线话筒发射距离可达500米以上,也可直接输入音频信号发射.

给我留言

留言无头像?