Need help for designing an antenna booster for 125-140MHz

[Nina]

Hello,
I need to build a very small antenna booster for a radio working on WFM mode on 120-140 MHz. It must be as small as possible, and the most difficult thing: The receiver works from 3V...
I found several designs using a bipolar - but they work from 9V to 12V.
Any help please?
TIA,
Nina

 

[vfone]

Re: Need help for designing an antenna booster for 125-140MH

Some SiGe transistors from Infineon works from 3V:
**broken link removed**

 

[Nina]

Re: Need help for designing an antenna booster for 125-140MH

Thank you very much vfone,
I have a roll of MPSH10 - maybe I'll try to build a preamplifier - and I thought that maybe changing some values - it may work...
Here is the simplest one I could find:
I think :?: that I even don't need the L1 and TR1...
Any suggestions of using MPSH10 instead?

 

[vfone]

Re: Need help for designing an antenna booster for 125-140MH

Unfortunately MPSH10 it will not work properly at 3V.

 

[kspalla]

Re: Need help for designing an antenna booster for 125-140MH

I think Question that I even don't need the L1 and TR1...

Hi,
This section will be as pre selection filter. Its recommend to keep, otherwise its a broad band repeater and cause lots of interference