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The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 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. [...] Content analysis details: (-0.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [76.96.27.211 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hvanesce[at]comcast.net) -0.0 SPF_PASS SPF: sender matches SPF record -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 6ffbd2c9950b634d6cc91f9565b01a8b Subject: LF: RE: VLF mods Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false Status: O X-Status: X-Keywords: X-UID: 784 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 =20 -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan = Sch=E4fer Sent: Thursday, December 19, 2013 2:34 PM To: rsgb_lf_group@blacksheep.org 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:=20 https://dl.dropboxusercontent.com/u/19882028/VLF/20131219_221825.jpg 73, Stefan/DK7FC