Home Up MGF1302 BFP196P BFG135a BF998 ATF54143

BFG135a 

BJT by Infineon

 

Extremely High Dynamic Low Noise Preamplifiers!

NEW!

FOR ALL HF BANDS 1-30 MHz

Output IP3 is over  +35 dBm at all HF bands ! 

  Noise Factor  NF: 2 to 2.5 dB!       

Gain S21: from 19 dB to 23 dB.      

Unconditional stability K>1, B1>0 

1-30 MHz (zip)

       

 

FOR 50 MHz BAND

Input IP3: around  +16 dBm !

Output IP3 : around  +39 dBm ! 

  Noise Factor  NF: around  2 dB!   

Gain S21:     around  23 dB.            

50 MHz (zip)

   

 

           

Built by Greg, SP3RNZ

       

Built by Zoran, E73S

Measurements results of 6m preamplifier:

BFG135a_6m_measur_by_WA7TZY.pdf

Build by Fred, WA7TZY

http://web.mac.com/sdt49/WA7TZY/Preamplifiers.html

 

NEW!

FOR 144MHz BAND

Input IP3: from +17 dBm  to +19 dBm !

Output IP3 : from +37 dBm to +39 dBm !

  Noise Factor  NF: 2 to 2.2 dB!                

Gain S21: from 20 dB to 23 dB.   

 

144 MHz (zip)

   

 

           

Built by: Palle, OZ8AFC

   

Built by: Josef, OK1TKP -http://josefkrieglstein.trenet.cz/?q=node/34

   

Built by: Zoran, E73S

 

WIDE BAND FOR HIGHER HF AND LOWER VHF BANDS

From 14 MHz to 70 MHz :

Input IP3: from +17 dBm  to +23 dBm !

                         

Output IP3 : from +39 dBm to +42 dBm !

Noise Factor  NF: 2.5 to 3.0 dB!       

Gain S21: from 16 dB to 23 dB.        

 

WB 10-70 MHz (zip)

  


  

FOR HIGHER HF BANDS

From 21 MHz to 28 MHz :

Input IP3: from +18 dBm  to +19 dBm !

           

Output IP3 : from +39 dBm to +41 dBm !

  Noise Factor  NF: 2 to 2.5 dB!         

Gain S21: from 20 dB to 23 dB.     

 

21-28 MHz (zip)

Built by Hans, DK1NB

   

Built and measured by: Anto, IK4PMB

  


  

FOR LOWER VHF BANDS

From 50 MHz to 70 MHz :

Input IP3: from +18 dBm  to +19 dBm !

       

Output IP3 : from +39 dBm to +40 dBm !

  Noise Factor  NF: 2 to 2.2 dB!                 

Gain S21: from 20 dB to 23 dB.   

 

50-70 MHz (zip)

   

Built by Alessandro IK0VAQ

       

Built by Dragan, 4O4A

       

Built by Popa, YU7EF

 

 

Atention!

Do NOT mix BFG135a produced by Infineon (former Siemens),

with BFG135 produced by Philips! They are different types of transistors and they have different IMD!

   

 In these preamplifiers use only BFG135a by Infineon!

 

 

AutoCAD files in DWG format for Printed Circuit Boards:

BFG135a  144 MHz - PCB    BFG135a  1-30 MHz - PCB

BFG135a WB 10-70 MHz - PCB    BFG135a  21-28 MHz - PCB    BFG135a  50-70 MHz - PCB   

All PCBs made of 1.6 mm double side FR4 or G10 epoxy (Er=4.8). Back side left as ground plane.

All used SMD components are type 1206.

AutoCAD files in DXF format for Printed Circuit Boards:

BFG135a  144 MHz - DXF    BFG135a  1-30 MHz - DXF 

BFG135a WB 10-70 MHz - DXF     BFG135a  21-28 MHz - DXF    BFG135a  50-70 MHz - DXF     

 


 

"Three Strong 6m Stations" Working Test

In order to check how amplifiers will behave in DX work and contests I conducted some simulations. BFG135a amplifier was fed with three strong signals ("three strong stations on 6m band") 7.1 mV (-30dBm) each, at its input. Output spectrum given below, showing what would be heard with ideal, linear receiver (no receiver IMD!) under such conditions, and very obvious IMD superiority of BFG135a preamplifier.

BFG135a IMD Test


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