>The only positive disconnect is to unplug the AC..
>
>But I have used the cross-over relays in several amps with no problems,
? Did you measure the filament inrush current with an oscilloscope?
>but
>I have always used RFI input filters and bypass caps on the relays, along
>with surge protectors. Works for me, and I think QRO and Commander uses
>them also.
>
>Thanks and 73's,
>Dudley
>WA5QPZ
>jhurry@austin.rr.com
>
>
>
>----- Original Message -----
>From: "R.Measures" <r@somis.org>
>To: "Glenn McNeil" <vk4tzl@bigpond.net.au>; <amps@contesting.com>
>Sent: Friday, March 26, 2004 10:06 AM
>Subject: Re: [Amps] Solid State Relays
>
>
>>
>>
>> >
>> >Hi Gang..
>> >
>> >Anyone had any experience using the Opto22 series of SSR's in Power
>Supply
>> >construction ?
>> >I've got two Opto22 Model 240D10-17 Devices and was thinking about using
>> >one to control mains supply to a 3kv Power Supply. They supposedly use
>> >zero crossover switching but I was wondering about their behaviour during
>> >fault conditions. I will be using G3SEK Boards to control things, and
>> >ideally drop off the control voltage on the Opto22 during a fault,
>thereby
>> >removing the mains supply
>> >
>> >Is this a better way then using a beefy relay...
>>
>> ** Probably not, Glenn. Relay contacts typically have less V-drop than
>> a Si junction. Also, relays are more likely to function in RF
>> environments. Sometimes, high-tech is not without problems. An example
>> is anti-lock brakes. On a test-track, ABS is clearly the best, however,
>> autos equipped with ABS have a higher accident rate than those autos
>> without ABS.
>>
>> cheers
>>
>> >and are these things
>> >reliable ?
>> >
>> >Anyone got any experience/exposure to these things ?
>> >
>> >73
>> >
>> >Glenn
>> >VK4TZL
>> >_______________________________________________
>> >Amps mailing list
>> >Amps@contesting.com
>> >http://lists.contesting.com/mailman/listinfo/amps
>> >
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>
>
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