Explanation of why HF Amplifiers need a PTT keying cable from the transceiver. Modern amp relays operate at low voltage so a simple keying cable is typically used. Interface or buffer relays are usually only needed for old amps with high voltage keying relays. | DX Engineering
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Explanation of why HF Amplifiers need a PTT keying cable from the …
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NJ Relay on Instagram: "Are you a trivia superstar? Test your knowledge with these facts about relay services! Questions: 1. In what year did relay services become available across the US? 2. What state was the first to establish a state telecommunications relay program? 3. What does “SK” mean when used on a relay call? 4. In what year did 711 become the universal dialing code for relay services in the US? Ready? Here are the answers: 1. 1990. 2. California. 3. “SK” means “Stop keying,” and sign
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