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Old 02-05-2016, 12:46 PM
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WM6 WM6 is offline
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Join Date: Nov 2007
Location: Borovnica, Slovenia
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Rest of the circuit is in first post.

This (second) drawing only explain how telescopic and spiral antennas from first post schematic are connected (using electrical symbol for spiral antenna instead of, not so - regarding connectivity - clear first drawings).

I am trying to held complete circuit as much simple as possible, despite building and tuning spiral antennas is not completely simple. Power supply is left to builder choice and availability (74LS00 logic should be supplied in range of 4.75–5.25 V). If you use 5V regulator on 9V battery in TX stage, then you can supply transistors direct by 9V and IC1 over 5V regulator (in this case schematic supply lines should be adequate adapted: 9V at R6 and R5 instead of 5V).

As I already say in first post: RX IC uA741 should be supplied symmetrically by two 9V batteries according this there is mistake in schematic pin marking - instead of 0V at negative supply rail there should be -9V (please correct accordingly !!!!!).
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