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Electronics => Beginners => Topic started by: Asim on September 08, 2013, 02:17:04 pm

Title: A question about a schematic
Post by: Asim on September 08, 2013, 02:17:04 pm

Hi guys, i have a silly question
can you explain the connection on the node before C11 ( what is connected to what ?)

http://www.electronics-diy.com/img/TX200.jpg (http://www.electronics-diy.com/img/TX200.jpg)

Title: Re: A question about a schematic
Post by: fcb on September 08, 2013, 02:34:23 pm

Shows a separation of the two parts, screening can basically.

Title: Re: A question about a schematic
Post by: Asim on September 08, 2013, 02:37:19 pm

so C9 & C10 are connected to that node ? what about that short circuit to the ground ?

Title: Re: A question about a schematic
Post by: JuKu on September 08, 2013, 03:27:45 pm

As I read this, it is a connector, just like input and output. Connector shield goes to ground and is decoupled to +9 by C9 and C10, but not to C11.

Title: Re: A question about a schematic
Post by: fcb on September 08, 2013, 04:31:50 pm

You wouldn't need (or want) a connector in that position.

It's a cheap FM bug design, you would have a two part screening can (really...?) to prevent feedback/noise/etc.. from the amplifier  hitting the modulator/osc.