Steve Thompson wrote:
On Thursday 26 February 2004 17:33, Bill Turner wrote:
Years ago I recall reading about an amplifier where the B+ supply was
grounded and the cathode was "hot" with the B- supply. I'm wondering if
that might have some advantages for high power amplifiers.
Specifically, the pi-network output could be simplified by eliminating
the plate choke. Here's how the output would look:
http://www.dslextreme.com/users/teeaye/B+.jpg
Believe it or not, this is a pi-network output circuit, just redrawn.
The same component values would be used as with a conventional circuit.
Doesn't it do a lovely job of offering an alternative insight into how a pi
network matches between the antenna and plate. The load control is the lower
capacitor and provides a variable 'tap' up and down the tuned circuit.
Steve
_______________________________________________
This looks like a nifty alternative for cooling the 2 x gi7b's i've been
scratching possibilites for on paper. Have a big heat sink for SCR's and
with anode grounded can incorpporate it into the rear of the enclosure
making a smaller box than would be required if the thing were kept insulated
from the box.
-bob
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|
