Heathkit Drake Dentron Parts
New! 120Vdc 3PDT and 2PDT Relay Board! There is no longer any need to use hard-to-find slow obsolete relays in SB200, SB220, Collins, and other amplifiers.
This board is a direct drop-in superior replacement for all 120Vdc antenna relays used in SB220, SB200, Collins 30L-1, and other 120Vdc antenna relays.
This board is time-sequenced to always close antenna contacts slightly before and hold the antenna contact closed slightly after the control signal and input/bias relay release.
Yellow color = relay keying line (20V per division)
Aqua color = Output Close time: 4mS
Red color = input and bias contacts
Green color = unwanted back-pulse
Sequenced 120Vdc relay system $59.00 shipped USA
Parts ORDERS or parts questions go to email@example.com