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[82.70.254.222]) by smtp.gmail.com with ESMTPSA id v22sm10311856wra.19.2017.06.13.08.54.06 for (version=TLS1 cipher=AES128-SHA bits=128/128); Tue, 13 Jun 2017 08:54:06 -0700 (PDT) From: Chris Wilson X-Google-Original-From: Chris Wilson Date: Tue, 13 Jun 2017 16:54:04 +0100 X-Priority: 3 (Normal) Message-ID: <1846316496.20170613165404@gmail.com> To: Nick In-Reply-To: <217be49a-ac5c-a34a-34a9-3d0b9e4e6eae@dctower.co.uk> References: <907292116.20170613161717@gmail.com> <59400441.7030008@posteo.de> <217be49a-ac5c-a34a-34a9-3d0b9e4e6eae@dctower.co.uk> MIME-Version: 1.0 X-Scan-Signature: c0336009bd9bab526ca27d297ea7579a Subject: Re: LF: Scopemeter current reading question Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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 X-Scanned-By: MIMEDefang 2.75 Status: O X-Status: X-Keywords: X-UID: 11971 Hello Nick, Sorry, for some reason I always call it a scopeMETER wheras I really mean a Scopematch, and I too have built it to give equal height traces. the traces are perfect sine waves and near as damn it can be laid on top of each other and one disappears, so near as damn it a perfect match. I was asking how the current increase shown if I run more power relates to the current in the antenna itself, can I use it as a shack based antenna current meter, or are the two not really related? Thanks. Tuesday, June 13, 2017, 4:41:46 PM, you wrote: >>> Hello LF'ers, >>> >>> My scopemeter shows current and voltage waveforms of course, but what >>> relationship does the current waveform have to the actual antenna >>> current? I am sad to say I haven't yet built a true antenna current >>> meter, it's on the to do list, near the top now. Thanks. >>> >>> > Well it depends on what you mean by scopemeter ... > Do you mean a scope match > > ? > or one of those 'fluke' handheld scopes > ? > If the former it depends on the coupling ratios you have chosen, mine is > set to 1V/A & 50V/V so same height traces = 50R > HTH BEIDN > Nick > M0HGU -- Best regards, Chris mailto:dead_fets@gmail.com