Re: (ET) blown relay

[dave barden <daveb speakeasy org>]

Yeah, unluckly or clumsy.   actually I think there is something else wrong
and I haven't found it yet.  I do have a new varistor. I'll put that in
tomorrow.

we are planning on putting a 40amp 600volt (automotive type diode, I think)
across the armature, as close as we can get it to the motor.

I'm told when a diode blows it does so rather spectacularly??  Especially
one rated at 40 amps?

BTW I discovered (well all right someone showed me) how to take the points
out of the relay by simply unhooking the little spring and pulling the 
point
"plate" out.  Makes dressing the points real easy.

dave

Neil Dennis wrote:

> Dave, "Knock on wood" I've never had a fried relay on my E-12. you must
> be unlucky or something.  Yes, the varistor is a device to absorb
> voltage surges when working correctly.  Its probably easier to replace
> it than try to check it without special equipment.  Also, a diode across
> the relay coil will shunt voltage spikes - just be sure the diode can
> carry the current generated, they usually blow open and you lose
> protection.
>
> wombat