VHF AMPLIFIER (PLZ ANSWER)

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
Do I use the VHF AMPLIFIER of this website for FM 75-108 MHZ.

 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

I dont know if you are using the VHF Amplifier or anyting at all from
this website, but you asked for an answer. ??? ;D ;D ;D

//Staigen

 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
i mean that this VHF AMPLIFIER will work on 76-108 MHZ frequency?
i m using it for FM radio dxing it will work or not ?

 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

A link would be nice! ???
So we are discussing the same project!

//Staigen

 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
Hi Staigen

you are not able to answer this question leave it man dont worry :) & give chance to others to give the answers of these simple questions.

 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

you are not able to answer this question
Hehe, so i am not able to answer this question, hehehehe

But, there are 3 projects dealing with amplifying signals in the 86-108Mhz range at the RF
Cirquits Projects side. One of them try to amplify these signals, using miller integrators, and
i dont think that is a good design.

leave it man
Ok, i leave it, but it is not a promise

dont worry
Im not worried

give chance to others to give the answers
I belive everyone is allowed to post in every topic, and usally also are wlecome

these simple questions
Simple? We dont even know wich of the amplifiers we shall discuss

//Staigen
 

ante1

Jan 24, 2004
4,138
Joined
Jan 24, 2004
Messages
4,138
Hi sssaaa,

Why to you ask these simple questions?   ???

 

MP1

Dec 7, 2003
3,399
Joined
Dec 7, 2003
Messages
3,399
sssaaa,
Post a link to the project.

MP

 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
HERE IS THE LINK OF VHF AMPLIFIER.

http://www.electronics-lab.com/projects/rf/009/index.html

I M USING IT FOR FM RADIO DIXING IT WILL WORK OR NOT?

 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

IT WILL WORK OR NOT?
Its not that simple, the question can't be answered that easy.
It might work or it might not work!
What is your antenna for instance? And how far is the radio stations?
The power they transmit at? Your topology?
Nothing can stand up against a good antenna arangement!
You should start there, if you dont already have done that.
The amplifier you linked to is the one that have the miller integrators.
I belive the other two is better, but i am not sure.

//Staigen
 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
thanks staigen

u know any link of any other good vhf amplifier for FM DXing?

 

SM2GXN

Feb 18, 2006
161
Joined
Feb 18, 2006
Messages
161
Hi sssaaa!

As Staigen correctly stated, a good antenna for the band to cover is the best way to start.
A good advice is, make som kind of rotatable antenna and add an RF-amp for weak signals that is just above the noise level.

 

SM2GXN

Feb 18, 2006
161
Joined
Feb 18, 2006
Messages
161
If your wish is to start by building an RF-amp check the attached PDF-file

VHF-UHF_Amp.pdf

 

Attachments

  • VHF-UHF_Amp.pdf
    132.9 KB · Views: 72

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

Can you describe your antenna and topography?
Isn't the other two good enough?
Here are the links:

http://www.electronics-lab.com/projects/rf/003/index.html

http://www.electronics-lab.com/projects/rf/022/index.html

And you got one from SM2GXN
Hey SM2GXN, what do you think of using miller integrators as VHF amplifiers?
You, if anybody should know about this!

//Staigen

 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
hi staigen
i m using yagi tv antenna.

Hey SM2GXN, yours pdf file is not opening in my computer.
you have any web link of this file?

 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

i m using yagi tv antenna
A TV antenna is not tuned to the FM band, and is not very good for DX-ing
at FM! Was the other two amplifiers not good enough for amplifying the signal?

Hey SM2GXN, yours pdf file is not opening in my computer
It opened nice here, its an article from an australian mag, with an antenna amp.
Do you have Acrobat Reader installed?

//Staigen
 

sssaaa

Feb 3, 2006
74
Joined
Feb 3, 2006
Messages
74
Was the other two amplifiers not good enough for amplifying the signal?
i didnt check the other two amplifiers.
but i also check this
http://www.uoguelph.ca/~antoon/circ/activefm.html
but not with 2570 transistor because it is not avaible here i use 2N5179.
and i use telescope antenna for this circuit.
this circuit is also not working. Is this circuit is correct?

Do you have Acrobat Reader installed?
yes i have
 

Staigen1

Oct 26, 2003
695
Joined
Oct 26, 2003
Messages
695
Hi

Isn't that one similar to one of the amps here on this site?
You cant use a simple telescope antenna for DX-ing!
The circuit seems to be a working circuit, but aso check the
cirquit, that is similar, here at E-Lab.
And use a good antenna, else you won't be hearing anything!


//Staigen

 
Top