Enclosure for CTCSS Sub Tone Encoder for Amateur Radio

Most Amateur Radio repeaters now require a low-level audio frequency tone to be transmitted by the user's transceiver in order to 'open' a tone coded squelch. Older transceivers do not have the encoder built in, and in order to use the transceiver with such a repeater, the user must add the encoder to the transceiver.

One such encoder is found on eBay at https://tinyurl.com/CTCSS-Encoder-by-jpl995. (If you don't trust the link, search for "CTCSS ENCODER SUB TONE" by jpl995.)

A friend needed to add one of these to an old radio, and in order to mount it I designed the enclosure provided here. The board is a snug fit inside the inner box, and rests on a ledge which provides some clearance for the parts mounted on the solder side. A post on the inside of the cover holds the board in place. The top of the DIP switch sits just under the inside surface of the cover. The pins of the headers will need to be trimmed a bit, as they extend above the switch body. The cable is routed through the hole in the sidewall to be connected to the transceiver by an appropriate method.

Once installed, we attached the box to the side of the radio using double-sided tape.

I don't require payment for my designs, but if you find this useful, I'd appreciate it if you would buy me a coffee. My Venmo ID is @Techineer. Thanks!