Wireless mic with MC145152

[fjpompeo]

wireless mic with mc145152

Hi there,

Want to build a wireless microphone using MC12017(Precaler) and MC145152-2(PLL) to work in the 108MHz - 120MHz band and 75us of preenphasis if possible to connect to the back of mic, a Shure SM58 or to install in a small box with no more than 100mW of RF power.

Regards,

Fernando

 

[diegolinder]

mc145170 homebrew

You need use vco, and low pass filter. The vco output conect to the RF power amp.

 

[cozturk]

mc145152

Low power ICs sholud be prefered for battery operation. 108MHz - 120MHz band is bad for antenna size. Jump to uhf band like 862Mhz licence free band.

 

[bobcat1]

Hi

You can use MC145170 insted {it will save you the pre scaller } and a vco from mini-circuit POS150

regards


Bobi

 

[papyaki]

Hi,

This is a link to a homebrew site which describe a Pll circuit receiver using the chips you want t use. It can give some ideas :

h**p://members.aol.com/gapershi/radio/radio.htm

* = t

 

[decfm]

ready stock... KIT and packet transmitter AM / FM / TV. price and picture www.geocities.com/decben

TDA Beben

thx
:idea::idea::idea:

 

[Code Warrior]

Nice link decfm. Instead of PLL why not you go for DDS chip it will be easy as compared to PLL based design.