Hello
i schearch a schema for a power amplifier with transistor on 160 to 10m.
Tnx for your help

Have you tried the ARRL Radio Amateur's Handbook?

--
Gregg t3h g33k
"Ratings are for transistors....tubes have guidelines"
http://geek.scorpiorising.ca

"manu" wrote in message
...
Hello

I am searching a schematic for a RF power amplifier using transistors
(Bipolar or FET) that will work on
the amateur HF bands (e.g., 160 through 10 meters).

Thank you for your help

Manu

The best references for RF transistor amplifier design are the Application
Notes and Books by Helge Granberg, K7ES (sk). Helge worked at Motorola and
passed away at age 63 in 1996. His Motorola application notes (AN762,
AN749, AN758, AR164, AR347, AR511 etc.) include the theory, schematics and
PC board layouts for construction of several different designs. Motorola
use to publish all of Helge's Application Notes, but I have not seen these
on the Motorola web site recently. Some of these Helge's Application Notes
and Motorola Engineering Bulletins are available he
http://www.communication-concepts.co...tion_notes.htm

Many of Helge's designs (PC boards) and hard to find parts are available
from Communication Concepts
http://www.communication-concepts.com/

He co-authored a book "RADIO FREQUENCY TRANSISTORS Principles and Practical
Applications 2nd edition • 290 pages" with
Norman Dye. This book is available from RF Parts (www.rfparts.com) and
other book dealers. RF Parts also routinely handles international shipping.

http://www.fetchbook.info/search_Hel...By_Author.html

Some HF kits (RF Electronics -Lee Martin, KD4YBC) are also available for
export
http://users.aol.com/rfelectron/rfelect.htm

http://www.qsl.net/gm0uhc/page6.html

Mike Grierson, G3TSO designed a 140W RF amplifier that appeared in January
1992 issue of RadCom (contact them for a back issue)
His web site does have photos.
http://www.qsl.net/g3tso/HFLinearFrameSet1.html

http://www.qsl.net/g3tso/images/Schematics/sshflin.pdf

JA0TJU is an excellent resource and reference for "broadcast style" RF
amplifier construction
http://www.ginzado.ne.jp/~hamradio/tju/2c3286.htm

Pieter Ibelings, N4IP has a web site for construction and references Helge
Granberg and Joel F. Paladino, N6AMG (sk) work in QEX ad QST.
http://www.ibelings.com/n4ip/mrf157.html

Dave Powis,
http://www.qsl.net/dl4mup/UKW45/UKW45_w.pdf

This should get you started on some research. Building is 90% reading,
planning & design !

w9gb