Direct FM

Posted on Feb 5, 2014

For this project the 1 1/4 meter Midland 13-509 ischosen, mainly because it`s use in several (transparent) links, which support the SRG 147. 20 repeater. First strip out several items not needed or otherwise to improve reliability and performance. That would include the T-R relay, the receiver deck, most or all of the trimmer capacitors for the transmitter and

Direct FM
Click here to download the full size of the above Circuit.

(now gone) receiver. These open slots can be used for transmitter control circuits, explained further on.

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