Since I don't use long wires or twin lead feed lines, I don't have any
problems with RF in the shack. I think that what I'll do is put an .01 cap
across the control connections and see how that works. If I have problems,
I'll try snubbers.
Thanks for all the input,
Bob Maser W6TR
----- Original Message -----
From: "Paul Kraemer" <elespe@lisco.com>
To: <k3lr@k3lr.com>; "'Alex Eban'" <alexeban@gmail.com>; "'AMPS'"
<amps@contesting.com>; "John Lyles" <jtml@losalamos.com>
Sent: Thursday, January 29, 2009 3:32 PM
Subject: Re: [Amps] Crydom Solid State Relays
> There is the Quencharc but they are pricey. Just make your own using
> 630wvdc
> poly caps and 1/2 watt resistors.
> Give me a load you are working with and I can point you in right direction
> for calulating values.
> Paul K0UYA
> ----- Original Message -----
> From: "Tim Duffy K3LR" <k3lr@k3lr.com>
> To: "'Alex Eban'" <alexeban@gmail.com>; "'AMPS'" <amps@contesting.com>;
> "John Lyles" <jtml@losalamos.com>
> Sent: Thursday, January 29, 2009 1:19 AM
> Subject: Re: [Amps] Crydom Solid State Relays
>
>
>> Is there a suggested Mouser available "snubber" capacitor R/C combo that
>> has
>> worked well?
>>
>> Maybe you or John know the correct part for us?
>>
>> Thanks
>> 73,
>> Tim K3LR
>>
>> -----Original Message-----
>> From: Alex Eban [mailto:alexeban@gmail.com]
>> Sent: Thursday, January 29, 2009 1:10 AM
>> To: k3lr@k3lr.com
>> Subject: RE: [Amps] Crydom Solid State Relays
>>
>> ...the Crydoms are "quieted" inside, so they don't need RFI protection!
>> However, I would warmly recommend to include a snubbing capacitor across
>> the
>> power pins just like you do with regular relays.
>> This is meant to prevent switching transients from "roasting" the power
>> section of the relay.
>> Alex 4Z5KS
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>> Behalf Of Tim Duffy K3LR
>> Sent: Thursday, January 29, 2009 7:27 AM
>> To: 'Bob Maser'; 'AMPS'
>> Subject: Re: [Amps] Crydom Solid State Relays
>>
>> Hi Bob:
>>
>> I have used Crydom SSR relays in AC ON and step start circuits for 15
>> years
>> with no special bypassing. No problems at all with this set up.
>>
>> 73,
>> Tim K3LR
>> http://www.k3lr.com
>>
>>
>> -----Original Message-----
>> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>> Behalf Of Bob Maser
>> Sent: Wednesday, January 28, 2009 7:08 PM
>> To: AMPS
>> 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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