Topband: Preamplifier with 2x 2n5109 pushpull

Sergio Cartoceti
Sun, 22 Dec 2002 17:51:23 -0500

To KK7UV and topband list

You need a well wound input - output ferrite toroidal transformers to
combine them and get a broadband match to 50 Ohm and

some kind of feedback and a proper level of bias current.  They work
well.   For just some photos take a look in my web site at:   (when inside from the main menu click
HOMEBREW GALLERY by I4FAF, then click SRC-02

                                           inside photos)

Let me know if you like that device as it appears.

Merry Christmas and Happy New Year to all TOPBAND reflector.

Sergio Cartoceti, IK4AUY

(also AC7PC)

e-mail:  <>