[Amps] Crydom Solid State Relays

[Jim W7RY]

You really only need 2 relays. One for one side of the AC line and one to 
short out the step start resistor on the other. There is voltage drop 
through those relays. About 1.4 volts as I remember.

And yes. .01 across the "coil" leads of the SSR is a good idea. What would 
the resistor be for?

73
Jim W7RY

----- Original Message ----- 
From: "Bob Maser" <bmaser at tampabay.rr.com>
To: "AMPS" <amps at contesting.com>
Sent: Wednesday, January 28, 2009 5:07 PM
Subject: [Amps] Crydom Solid State Relays


> The power supply of my new amplifier will be using 3 40A Crydom SSR 
> relays,
> One on each leg of the 240VAC and another in one leg to short out the step
> start resistor.  I have been planning on using the SSR's w/o any resistors
> or capacitors across the control connections but I have been advised that 
> I
> should put resistors and capacitors across the control connectors to 
> prevent
> RF from affecting the SSR function and possibly causing "chatter".   I 
> would
> appreciate some feedback from the group.  I don't believe that Jerry
> Pittenger K8RA used anything in the 3CX1500D7 amp that was featured in the
> 2006 ARRL Handbook.
>
> Bob Maser  W6TR
>
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>


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