Relay

Low Power Relay Switching

Using a relay to remotely switch the low power to the receiver and exciter sections of your Delta / Rangr conversion is easy to accomplish.
To do this, try to find a small relay that will fit within the radio you are converting and epoxy it to a suitable location. For both the Delta and Rangr conversions, I had on hand a Radio Shack miniature P/C relay with a 12 volt coil. The contacts are rated at 10 amps, so it will do the job nicely. It's stock number is 275-248A. Other low profile relays are undoubtedly suitable.

Note: Just be sure that you use a fuse in series with the relay as it will be drawing its power from the 'always on' lead that powers the PA final amplifier transistors.

The relay may be epoxied to any convenient spot within the radio. In the Delta, for example, it can be mounted in the M/P compartment. In the Rangr, mount it on the underside in the spare compartment adjacent to the PA transistors, as shown in this picture.

DISCLAIMER - - If you follow the steps outlined herein, you do so at your own risk. I cannot, nor will not, be responsible for any possible damage to radio equipment, personal property, to yourself or to others caused by modifications that you may make to the radio as a result of your reading this.

The M/P controls TRANSMITTING as well as receiving on many frequencies, suitable for a wide range of HF, VHF and UHF needs. In the USA, TRANSMIT operation requires a license issued by the FCC for the class of operation intended. Amateur radio licensees must maintain strict control over their equipment, preventing unlicensed operation within the amateur bands, or outside of them.