[Amps] Filament Inrush Control

[dj2001 at mn.rr.com (dj2001@mn.rr.com)]

I'm using a 40 ohm and it seems to pull in almost right away.  I 
still hear a thump when the power is turned on which leads me to 
think it's not delaying enough.  I wonder if a 100 ohm might be a 
better choice.  It's a AL80A amp.

Dale K9VUJ


>Depends on the size resistor you use and how big the filter cap is 
>in the supply. I select resistor size so that it pulls in after a 
>short delay of a second or so. Too large a resistor and the voltage 
>will never get high enough to pull the relay in.
>
>73
>Gary  K4FMX
>
>
>dj2001@mn.rr.com wrote:
>>
>>How much of a delay can I expect when using a 115vac relay for step 
>>start?  It seems to me there wouldent be much.
>>
>>Dale K9VUJ
>>
>>
>>
>>
>>>I use one in a power supply I built. Works fine. Get a big buzz on 
>>>the armature as it is engaging though.
>>>
>>>73
>>>Gary  K4FMX
>>>
>>>
>>>dj2001@mn.rr.com wrote:
>>>
>>>>  Regarding the step start.  Is there anything wrong with using a 
>>>>115 vac relay?
>>>>
>>>>Dale K9VUJ
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>>>
>>>
>>>
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