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Re: LF: DK7FC LF PA schematics

from [Tony Baldwin] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: Re: LF: DK7FC LF PA schematics
From: Tony Baldwin <[email protected]>
Date: Sat, 10 Mar 2012 02:50:22 -0800 (PST)
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Thanks for the schematics Stefan.
I have them printed off for further reading, and very pleased that you added "questions welcomed" :-)
73, Tony, EI8JK

From: Stefan Schäfer <[email protected]>
To: [email protected]
Sent: Friday, 9 March 2012, 21:54:10
Subject: LF: DK7FC LF PA schematics

LF,

Now i've finally documented my complete LF PA in 2 documents, for those who are interested.

The exciter: http://dl.dropbox.com/u/19882028/LF/LF%20H%20bridge%20PA%20Exciter%2C%20DK7FC.jpg
The power part: http://dl.dropbox.com/u/19882028/LF/LF%20H%20bridge%20PA%2C%20DK7FC.png

Questions, hints and constructive advice is welcome.

BTW there are further components which complete the TX system here, like a watchdog savety and PTT sequencer circuit, the IQ transmit converter, temperature controlled fans, the automatic variometer. These do not necessarily belong to the PA and aren't shown here. A AM Modulator circuit which allows the PA to easy control the TX power and allows linear modes will be added soon.

73, Stefan/DK7FC





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