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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: So i cannot transmit OP32 on VLF because it would be incoherent Ah-so reverse engineering in D land , means going back in time , now it makes sense ...back to basic's , like re inventing the wheel ! [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [80.12.242.42 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message X-Scan-Signature: ab7de7439a3fce0b74220375dc6f18e8 Subject: Re: LF: VLF exciter Content-Type: multipart/alternative; boundary="----=_NextPart_000_01E3_01CF043A.609CB250" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40,HTML_FONT_BIG, HTML_MESSAGE,MISSING_OUTLOOK_NAME 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: 3157 This is a multi-part message in MIME format. ------=_NextPart_000_01E3_01CF043A.609CB250 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable So i cannot transmit OP32 on VLF because it would be incoherent=20 Ah-so reverse engineering in D land , means going back in time , = now it=20 makes sense ...back to basic's , like re inventing the wheel ! PS, Modern OP32 can be sent by the average Wobbly Bob system ! : -)=20 From: Stefan Sch=E4fer=20 Sent: Sunday, December 29, 2013 1:43 AM To: rsgb_lf_group@blacksheep.org=20 Subject: LF: VLF exciter Am 28.12.2013 23:33, schrieb Markus Vester:=20 [...]=20 PS Any progress on bypassing the divider in your VLF transmit chain? Aaah, no, i forgot that. So i cannot transmit OP32 on VLF because it = would be incoherent then. So i have to key the PA via a VOX and OP32 = tones, still :-/ In this H bridge PA config, an exact 50% duty cycle isn't needed, so i = may actually remove the divider. But then i need a solid and defined = input signal wave form! How do i get an inverted signal then? A = transformer isn't possible since i like to have a wide frequency range = of the PA. So far it works from 10 Hz to > 100 kHz. With the frequency = divider, the wave form can be quite distorted, no problem unless the = peak reaches the necessary voltage level. So maybe it is better to build = the VOX circuit instead? Also i want to leave the PA circuit as it is, = for nostalgic reasons :-) Or do you have another idea? I remember that circuit with the XOR = gates... 73, Stefan/DK7FC ------=_NextPart_000_01E3_01CF043A.609CB250 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
So i cannot transmit OP32 on VLF because it would be = incoherent
 
 
Ah-so  reverse engineering  in D land  ,=20 means   going  back  in time , now it =
makes sense ...back to  basic's , like  re = inventing=20 the  wheel  !
 
PS, Modern OP32  can be sent  by the  average  = Wobbly=20 Bob  system  !
 
: -)

From: Stefan = Sch=E4fer
Sent: Sunday, December 29, 2013 1:43 AM
To: rsgb_lf_group@blacksheep.org= =20
Subject: LF: VLF exciter


Am 28.12.2013 23:33, schrieb Markus Vester:=20
[...]=20
 
PS Any progress on bypassing the = divider in your=20 VLF transmit chain?

Aaah, no, i forgot that. So i cannot transmit OP32 on = VLF because=20 it would be incoherent then. So i have to key the PA via a VOX and OP32 = tones,=20 still :-/

In this H bridge PA config, an exact 50% duty cycle = isn't=20 needed, so i may actually remove the divider. But then i need a solid = and=20 defined input signal wave form! How do i get an inverted signal then? A=20 transformer isn't possible since i like to have a wide frequency range = of the=20 PA. So far it works from 10 Hz to > 100 kHz. With the frequency = divider, the=20 wave form can be quite distorted, no problem unless the peak reaches the = necessary voltage level. So maybe it is better to build the VOX circuit = instead?=20 Also i want to leave the PA circuit as it is, for nostalgic reasons = :-)
Or do=20 you have another idea? I remember that circuit with the XOR = gates...

73,=20 Stefan/DK7FC
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