LF: RE: VLF mods

To:	<[email protected]>
Subject:	LF: RE: VLF mods
From:	"hvanesce" <[email protected]>
Date:	Thu, 19 Dec 2013 16:10:15 -0700
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Stefan,

Nice clean layout.

Are those polypropylene film capacitors on the printed circuit board? If so,
great choice; best ESR at high voltage at 10kHz.

73,  Jim AA5BW  


-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Stefan Schäfer
Sent: Thursday, December 19, 2013 2:34 PM
To: [email protected]
Subject: LF: VLF mods

Hi VLF,

Here i spent some time to modify the VLF PA used during the field
experiments. The old version was on a wooden plate (known from the photos in
a few amateur radio magazines and images at qrz.com). Now it even has an EMI
filter!! :-) and a switch and fuses and a grounded box which is better due
to safety aspects (other people could touch it when the plug is in and i'm
not watching). Maybe i can replace the fiber optic cable by a simple
optocoupler and isolated BNC jack.
So far for today: 
https://dl.dropboxusercontent.com/u/19882028/VLF/20131219_221825.jpg

73, Stefan/DK7FC

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