• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

6NO30 Amperite time delay


I use an Amperite 6NO30 time delay tube to switch a relay (230 Volt coil) in order to switch 230 Volt with higher current. When the Amperite’s 30 seconds have passed, the contacts make contact and I notice the relay rattles shortly before contact is 100%. Small sparks are visible between the contacgts. The reason is that the actual contact is made quite slowly. I’m now trying to rectify the 230 Volt AC for the relay, with a small capacitor, to get the relay switching better/faster.

Any other suggestions for improvement?

Regards, Gerrit