On Sun, 21 Mar 1999 20:18:49 "Phil T. (VE3OZZ)" <phil@vaxxine.com>
writes:
>
>A review of the Newark and Electrosonic catalogs reveals a
>smorgasboard of
SNIP
>For soft start, you would add a second solid state timed relay, such
>as the
>Crydom DSD/DLD series, to short out the line surge resistors. Time
>delay
>is adjustable by placing different value of resistors across the time
>deley
>control pins. Typical time delays for this particular product range
>from
>0.1 sec to 133 sec.
Amp Supply used SS time delay relays at the very end of their reign.
Worked just fine in the LK-750, 780 and 800 which were 1,2 and 3 tube
3CX800A7 amps respectively.
73 Carl KM1H
>
>Crydom also makes solid state "soft start" modules (series "SST") but
>there
>isn't much information about how they function.
>
>I can't see any reason not to use solid state relays. Some of the
>commercial amps MUST be using these somewhere - they're small, quiet,
>no
>moving parts or contacts.
>
>Phil
>
>At 02:36 PM 3/21/99 -0600, you wrote:
>>
>>They are OK for power on, but will not work for soft-start.
>>They are too fast to let the HV build up to 2/3 of max.
>>and cannot be slowed down like a mechanical relay.
>>GL!
>>Phil, K5PC
>>
>>-----Original Message-----
>>From: Arthur Moe <kb7ww@chatusa.com>
>>To: Amps <amps@contesting.com>
To: <amps@contesting.com>
>>Date: Sunday, March 21, 1999 12:35 PM
>>Subject: [AMPS] Info needed: Soild Statte Relays
>>
>>
>>>
>>>Are Solid State Relays suitable for main power on and soft start in
>>>a QRO Amp?
>>>
>>>Art
>>>KB7WW
>>>
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>>>
>>>
>>
>>
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>>
>>
>>
>
>
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>
>
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