? RE transistor biasing
From: Dave (db5151_at_hotmail.com)
Date: 09/28/04
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Date: Mon, 27 Sep 2004 20:50:57 -0500
I am trying to design and build a simply RF amplifier to give me better
reception on standard television (ch 2 is the main thing I want. If I can
get that, the rest will fall in place.) Problem is, I can't remember
anything about transistor biasing. Do you simply need a .6 volt difference
between the different junctions? I am wanting to use two transistors, the
first in common-base configuration and the second in common collector
configuration, for the benefits of impedance matching I understand this will
provide. I understand the requirements of forward/reverse biasing, but
can't seem to dig out the actual voltages needed to do the job. Can anyone
offer help, or parhaps a website that explains the intricacies? Currently
using my old tradeschool textbooks (Grob Basic Electronics, and Transistor
Electronics by I-can't-remember-who.) Also, what frequencies cover the
"standard" TV spectrum? I mean Ch. 2 through 69, or whatever it is. Can't
seem to find that. *Think* it's roughly 50 Mhz to 450 Mhz, or something
like that. Is this close?
Thanks much for any help.
Ignorantly yours...
Dave
db5151@hotmail.com
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