RF Amplifier Keying Relay Circuit - Ham / CB Radio

Description

Keying Relay Circuit Kit:
This keying circuit kit (also known as a Carrier Operated Relay circuit) is used for automatic switching between receive mode and transmit mode. The kit includes all the necessary parts for most RF Linear Amplifiers used for CB and Ham Radio. The PC board is professionally fabricated and is designed to produce reliable operation. The relay is is rated for 30 amps and has a lower impedance when compared to other relay designs. The RF sensing circuit is designed for the High Frequency and VHF Bands and supports AM, FM, and SSB operating modes. For SSB, a delay circuit is included. The relay can also be switched directly from your linear amplifier via the PTT jack or RCA connector.
Typical designs use a small signal transistor to turn the relay coil on and off. This new design employs an opto-coupler which provides complete isolation between the RF single and the 12 volt DC supply. The advantages are less RF signal to trigger the opto-coupler and virtually no interaction between the RF signal and the 12 volt source. This topology offers high reliability with no false switching or relay chattering.The board dimensions are 2.5" wide by 3.5" long. Units ship with schematic and detailed assembly instructions. I also provide free technical support by email.
Operating Voltage 12 to 14 volts DC
Current Draw 100 mA
Relay Contact Rating – 30 Amps
Power Rating 2000 watts RMS / 3000 watts PEP
Input Power Required For RF Sensing - 0.5 watts Min.
Operating Modes – AM, FM, SSB
Frequency Range - 1.8 to 54 MHz
This is a kit as requires basic soldering skills for assembly.
Watch Video:
https://www.youtube.com/watch?v=qVaExW6SoTo&t=77s
Legal Disclaimer / Wavier
By purchasing this product you are agreeing to all terms and conditions stated herein. Buyer assumes full responsibility for the application and use. The Seller assumes no liability for the use of this product and is not liable for any damage to equipment or personal property. Further, the Seller assumes no liability for personal injury or fatalities that may occur to the buyer or third parties if resold. Buyer agrees to use this product at his/her own risk.
The Seller makes no warranty, or guarantees regarding the suitability of the products for any application / purpose or the continuing production of any product. It is the buyer’s responsibility to validate that a particular product with the properties described in the product specification is suitable for use in a particular application. Parameters provided in the product description and/ or specifications may vary in different applications and performance may vary or change over time. The Buyer is purchasing this product “As Is” and using or reselling this product at his/her own risk.
To the maximum extent permitted by applicable laws, the seller disclaims (i) any and all liability arising out of the application or use of any of its products,(ii) any and all liability, including without limitation special,consequential, or incidental damages, and (iii) any and all implied warranties,including warranties of fitness for a particular purpose, pass through warranties if product is resold, and all non-infringement rights.