Electronic Projects, forums and more.

Go Back   Electronic Circuits Projects Diagrams Free > Electronics Forums > Electronic Projects Design/Ideas/Reviews


Electronic Projects Design/Ideas/Reviews Are you building an electronic project or want to? Maybe you need some assistance? Come and submit your electronic questions here and let our experienced members find a solution.

Reply
 
Tools
Old 9th November 2009, 08:02 PM   #1
Default Wireless microphone help

so... I'm doing this Wireless microphone schematic
and i have a couple of questions... it says that L1 is 3mm in diameter with 5 turns 0.61 mm copper wire. what does this 0.61mm mean? the lenght of the wire?
another thing. the antenna.. so if i for example use 90MHz frequency i need to get 45cm of wire for the antenna according to this? and what kind of wire should i use for the antenna? thanks guys
T-bro is offline  
Old 9th November 2009, 08:23 PM   #2
Default

The wire diameter is 0.61mm and you wind a coil of it on a former which is 3mm in diameter. The coil has 5 turns of wire wrapped around the former.....

You dont say where you are location wise, the wire is 0.61mm in diameter, that from tables is 23 SWG in English money..look here Wire Gauge Reference Table
about 2/3ds down the page....

For the antenna wire just use some thin pvc hook up wire
__________________
Eccentric millionaire financed by 'er indoors

Last edited by Chippie; 9th November 2009 at 08:24 PM.
Chippie is offline  
Old 9th November 2009, 10:13 PM   #3
Default

Quote:
Originally Posted by T-bro View Post
another thing. the antenna.. so if i for example use 90MHz frequency i need to get 45cm of wire for the antenna according to this? and what kind of wire should i use for the antenna? thanks guys
That would be AWG14. The coils don't care a lot how heavy the wire is (within reason) as long as the dimensions are met. They are wound with stiff wire so they don't move.

The output isn't near any standard antenna impedance. 45cm is fine. There are many ways to make a better antenna with radial wires at its base (look up ground plane).

Any single conductor wire will function electrically. Some people use stiff wire because it stays straight more easily.
__________________
de KI6RWX

Last edited by mneary; 9th November 2009 at 10:15 PM.
mneary is offline  
Reply

Tags
microphone, wireless

Thread Tools
Display Modes


Similar
Title Starter Forum Replies Latest
Wireless microphone Davey C Sr Repairing Consumer Electronics 4 14th August 2009 09:52 PM
wireless door bell into wireless driven relay-query gudu Electronic Projects Design/Ideas/Reviews 1 28th February 2009 05:55 AM
microphone help` jaravind Electronic Projects Design/Ideas/Reviews 2 3rd September 2004 08:22 PM
what microphone?? zachtheterrible General Electronics Chat 4 14th August 2004 11:23 PM
Microphone narco Electronic Projects Design/Ideas/Reviews 0 2nd September 2003 11:38 PM



All times are GMT. The time now is 07:00 PM.


Electronic Circuits  |  Learning Electronics
eXTReMe Tracker