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LF: 475kHz crystal

To: [email protected]
Subject: LF: 475kHz crystal
From: Dimitrios Tsifakis <[email protected]>
Date: Mon, 7 Jan 2013 16:24:16 +1100
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Reply-to: [email protected]
Sender: [email protected]
Hello LF/MF group,

I though this may be of interest to those what would like to build the
simplest transmitter possible for MF.

I found these cheap crystals on eBay:

http://www.ebay.com.au/itm/2-PCS-15200-KHz-HC-49-U-X-TAL-Bargain-Pack-HC49U-/320828846717?pt=UK_BOI_Electrical_Components_Supplies_ET&hash=item4ab2e3b27d

They are 15200 kHz which can be conveniently used with a 74HC4060 to
make an oscillator, then connect to the divide_by_32 line for a nice,
stable 475 kHz signal. You can then drive a class-E FET PA for any
kind of power you like.

73, Dimitris VK1SV


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