Great. They were simple, inexpensiv and as reliable as the is long. They
were used extensivly in early handbooks to delay B+ turn on to allow the
mercury vapors 30 sec to warm up.
Jim
----- Original Message -----
From: "Paul Kraemer" <elespe@lisco.com>
To: "Jim Carr" <n7fcf@hctc.com>; <garyschafer@comcast.net>;
<Amps@contesting.com>
Sent: Thursday, March 04, 2010 1:24 PM
Subject: Re: [Amps] Solid state relays and step start
> Places still list Amperite time delay products as available
> Paul K0UYA
> ----- Original Message -----
> From: "Jim Carr" <n7fcf@hctc.com>
> To: <garyschafer@comcast.net>; <Amps@contesting.com>
> Sent: Thursday, March 04, 2010 3:05 PM
> Subject: Re: [Amps] Solid state relays and step start
>
>
>> Question. Are the plugin thermal delay relays still manufactured. We used
>> them a lot twenty five years ago in manufacturing and large scale
>> refrigeration control. They plugged into an octal socket and had beefy
>> contacts. They were relativly inexpensive at the time.
>> Jim
>> ----- Original Message -----
>> From: "Gary Schafer" <garyschafer@comcast.net>
>> To: <Amps@contesting.com>
>> Sent: Thursday, March 04, 2010 12:53 PM
>> Subject: [Amps] Solid state relays and step start
>>
>>
>>> Has anyone had problems using a solid state relay to short out the step
>>> start resistor in a power supply?
>>>
>>> I have heard of problems of not enough current thru the SS relays (when
>>> amp
>>> is in standby) when used as the primary on/off relay. Sometimes a
>>> resistor
>>> has to be placed in parallel with the transformer primary so the relay
>>> works
>>> properly.
>>>
>>> When used in a step start circuit the current could be quite low as well
>>> as
>>> the voltage at the relay due to the resistor across the relay. Any
>>> issues
>>> here?
>>>
>>> 73
>>> Gary K4FMX
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
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>>
>>
>>
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>> _______________________________________________
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>>
>
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