Hi Guyz,

This is mine first post on this form i need help in fm thru varactor diode

I have to implemenet it in some hours n i need help with names of some of the varactor diodes that are commonly used in fm

i need those var diodes which are available in multisim 11 if u r not sure that it will work 100%

please i got no time hope u understand as i hav waisted alot time already as some of the var diodes were not in the market

please help

 

Please Help i got very less time any live chat with experts ?

 

Hello,

Here is a list of varicap diodes:

Varicap Dioden 
BA102       6,50 special 
BB105G      0,95 2-6 pF 
BB121       0,75 2-12 pF UHF 
BB221       0,67 1,8-11 pF UHF 
BB329       0,57 3-35 pF 
BB521       0,55 2-11 pF UHF 
BB529       0,79 10-50 pF Lineair 
BB531       0,79 3-35 pF 
BB609A      0,85 3-33 pF 
BB622       0,57 1,8-11 pF UHF SMD 
BB629       0,85 3-35 pF 
BB701       0,80 0,8-8 pF SMD 
BB801       0,80 1-9 pF SMD 
BB804       0,75 dubbel5-45 pF SMD 
BB814       0,59 dubb.10-45 pF SMD 
BBY31       0,75 2-15 pF SMD 
ZC111       0,25 5-33 pF Budget

This list is from my local dutch supplier with prices in euro's.

Bertus

 

I am using BB109 or MV109 availabale easily here

i need a circuit diagram which dont uses an ic after lc tank

no ic used in circuit just varactor,capacitors,resistors,inductor n supply

 

Tell your teacher that FM radios have used ICs for about 40 years.
The varactor diodes that you can find are very old and are obsolete.
It is too bad that "your market" does not have any modern parts.
Multisim doesn't know about any modern parts.

 

I agree with Audioguru. However, for learning the fundamentals of radio, the MV2109, or the MV109 are both good choices. Always consult the datasheet to find characteristics you are looking for.
http://www.datasheetcatalog.com/datasheets_pdf/M/V/2/1/MV2109.shtml
http://www.datasheetcatalog.com/datasheets_pdf/F/M/M/V/FMMV109.shtml
http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=variable+capacitance+diodes

 

Here is a link to a tutorial on the varicaps.
http://electronics-diy.com/varicaps.php