The keyer accessory kit is a circuit board with a 5 Volt, low power regulator AND a high voltage keying circuit, similar to the Keyall, which is the perfect addition to the Island Keyer II or the CMOS Super Keyer III kit from Idiom Press or any other keyer that doesn't have a 5 volt regulator or a high voltage (for cathode or grid block tube rigs) keying output. The Solid State Relay is rated at 120 mA and 400 V. Some cathode keyed rigs such as the Knight T-150 may require the Keyall due to larger than 120 mA currents. If in doubt, measure the current and voltage with your rig.
For any questions, please send an email to me, Chuck Olson, WB9KZY at:
with your question.