relay switching

[lowell]

I agree Jon. By relay transformer I just mean a separate small transformer 120vac to about 14-18vdc when rectified. Yes why use more current than need be... I will look into if those relays will fit the boards I've custom made, that's another aspect I have to see about. Also 2 of the relays are switch plate and screen voltage so they have to have a good contact current rating.

Enzo let me know how your test will show me if it's doable.

[Enzo]

You want to know if the bias winding can supply that current. Use Ohm's Law to calculate what resistance you;'d need at whatever voltage comes out of that winding. They apply that resistance - don't forget to calculate the wattage for your test part - and see if the winding voltage sags a lot. It won;t burn out the winding in a couple seconds of test.

Switching B+ voltages? Relay contact current ratings may not be the concern here, I doubt you are switching an amp of 500v. But the voltage rating is a concern. Small relays have a vey small gap between open contacts, and when they part, an arc can easily strike and burn the relay into slag. Pretty blue-green flame though.