[HomeBrew] 72 MHz amp

R. Blackman richard.blackman at sympatico.ca
Sun Nov 28 10:56:57 EST 2004


Hi to the group.

I am trying to build a low power amp for 72 MHz IF in a homebrew
transceiver.
The following circuit  works great  at 25 MHz but is dead at 72 MHz.
Any advice would be appreciated. 


                  |--------------|-----2uH---------12vdc+
                1000 ohm         |   
                  |              | 
                  |              |--------0.01uf --output
                  |              |           
                  |  2N3866  b  /  c
input---0.01uf----|------------[
                  |             \--2.2 ohm----|-- 22 ohm---gnd
                  |          e                |
                  |                           |
                 470 ohm                      |--0.01 uF---gnd 
                  |                                                 
                  |
                 gnd

Thanks for any comments.
Richard / VA3NDO


 


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