KD9SV Products SV-KR Keying Relays

1 Customer Reviews

KD9SV Products SV-KR Keying Relays are actually high-speed Solid State interface units that allow all amplifiers, even older amplifiers with high voltage keying circuits, to be safely connected to and keyed by newer transceivers. SV-KR units provide a "Soft Keying Circuit" or buffer to prevent damage to newer transceivers with very small T/R relays or circuits that cannot safely ground some amplifier high-voltage high-current changeover relays. Also, for those rigs and amps that are QSK capable, high speed CW full break-in is no problem for the KD9SV SV-KR Keying Relays!

Actually, SV-KR Linear Amplifier Keying Relays are opto-isolated Solid State devices with back-to-back high-current FETs that can sink (connect to ground) up to 500 volts, positive or negative, at an incredible 2.5 amperes maximum. That capability makes them an ideal keying relay for older amplifiers with big, old relays. But, these super-fast keying devices are also good as an interface to new amplifiers and other switching devices. Keying input, labeled "QSK T/R" needs less than 1.5 ma when keyed. Many transceivers may be connected to the SV-KR Keying Relay from their ACC connector on their rear panel.

SV-KR can even be used as a CW key, keyer, or relay debouncing circuit or a remote high-power DC switch!

Low cost and simplicity make SV-KR Keying Relays an ideal way to key your amplifier while providing complete safety and protection for your transceiver. Order one of your own KD9SV Products SV-KR Keying Relays from DX Engineering and give your rig the keying power it needs!