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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id 90-v6sm2813721wrl.79.2018.05.16.08.38.06 (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 16 May 2018 08:38:06 -0700 (PDT) Date: Wed, 16 May 2018 16:38:05 +0100 From: Chris Wilson X-Priority: 3 (Normal) Message-ID: <1462187663.20180516163805@gmail.com> To: DK7FC In-Reply-To: <5AFC4B6A.80308@posteo.de> References: <622517661.20180516155923@gmail.com> <5AFC4B6A.80308@posteo.de> MIME-Version: 1.0 X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hello Stefan, Yes the waveforms look perfect, only a minor phase shift from 12V supply to 55V. But the vario circuit seems ultra sensitive, a sniff of wind moving the antenna around sees the motor constantly correcting. As does changing voltage to the amp considerably, so it changes from "QRP" to QRO. Am I right in thinking adding another two BAT42 diodes or whatever they are in each leg of the last opamp will calm it down a bit? Otherwise it's working well :) Thanks for sharing the circuit. [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [2a00:1450:400c:c09:0:0:0:236 listed in] [list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (dead.fets[at]gmail.com) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: b77892ad90d0261eaf071f4f6cf31464 Subject: Re: LF: Is it expected for antenna phase to change with varying power levels? Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=PRIORITY_NO_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 Hello Stefan, Yes the waveforms look perfect, only a minor phase shift from 12V supply to 55V. But the vario circuit seems ultra sensitive, a sniff of wind moving the antenna around sees the motor constantly correcting. As does changing voltage to the amp considerably, so it changes from "QRP" to QRO. Am I right in thinking adding another two BAT42 diodes or whatever they are in each leg of the last opamp will calm it down a bit? Otherwise it's working well :) Thanks for sharing the circuit. Wednesday, May 16, 2018, 4:16:58 PM, you wrote: > Hello Chris, > It depends on what you mean with 'increased'. If you increase it from 1W > to 10 kW then i would expect changes. But from 50W to say 200W there > should not be significant changes. > Watch the waveforms. Are they still looking like a pretty sinus at QRO? > 73, Stefan -- Best regards, Chris mailto:dead.fets@gmail.com