Low Frequency CTCSS PL Sub-Tone Audio Oscillator


Posted on Feb 7, 2014

The lf555afosc1. pdf file download is the diagram (with notations) of Sub-Tone (CTCSS or `PL`) Oscillator, made with the famous 555 timer IC set up for astable-multivibrator operation. The values shown place the tone range near the center of the standard CTCSS Sub-Tone Range. You can build this circuit very small, about postage stamp size. Connecti


Low Frequency CTCSS PL Sub-Tone Audio Oscillator
Click here to download the full size of the above Circuit.

on is made to the "high side" of your transmitters deviation pot (not at the mic input). The comparator operation of the 555 provides a measure of stability against voltage fluctuations. You can adjust the tone range with slight value changes in the. 1uf capacitor. This circuit also makes a nice DC Clock Pulse Generator by taking the output as noted. The file is in Adobe PDF format, but you can right click your mouse and save the gif file picture (shown just above) from this description page. We/I get a lot of Email from visitors who drop into these file down load description pages via a web search "engine" (like Google). Vistors are not able to locate the file download icon for that specific description page. There is a simple way to find the file download icons on the main sonic web page. Second: Back space out the page your now looking at in your browser location line. As an example, using the description page. Remove the last portion of the web location with the keyboard back space key to read then press your Enter Key to reload the main sonic page "just in front" which would probably has the inforamation you`re looking for. This works on most of the current browsers at most web sites.




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