Search found 3 matches

by snovotill
Wed Aug 03, 2016 2:38 pm
Forum: SDR Antennas
Topic: Magnetic Loop Antenna with SDRPlay
Replies: 9
Views: 9276

Re: Magnetic Loop Antenna with SDRPlay

I was looking at that Degan thing but passed it up because it isn't broadband. This looks absolutely fantastic though, so I bought one tonight: http://active-antenna.eu/amplifier-kit/ And the full write-up with theory is here: http://lz1aq.signacor.com/docs/wsml/wideband-active-sm-loop-antenna.htm S
by snovotill
Wed Aug 03, 2016 1:25 am
Forum: SDR Antennas
Topic: Magnetic Loop Antenna with SDRPlay
Replies: 9
Views: 9276

Re: Magnetic Loop Antenna with SDRPlay

Hey how come everyone is using such expensive active loops for LF? Couldn't a guy just use a 3 foot diameter loop of copper pipe and match the impedance to the SDRplay input with a balun of some description?
by snovotill
Wed Aug 03, 2016 1:20 am
Forum: SDR Antennas
Topic: Input impedance at UFL-R connector.
Replies: 1
Views: 1969

Input impedance at UFL-R connector.

I request to know the design spec for input impedance expected at the U.FL connector on the circuit board. The datasheets say that AMPORT2 impedance on the radio chip is 75 ohms, but no spec is given for the MGA-68563 LNA chip. ...and so then: (1) I'm thinking therefore that the answer is 75 ohms bu...

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