From bgvocals@yahoo.com Sun Aug 12 17:50:42 2012
Subject:Re: Gear and power strips

Generally speaking, in a signal chain from A -> B -> C -> D, you would turn A on first, B on next, then C, then D.  Moreover, it is beneficial to let the output from A stabilize before turning B on, let B stabilize before turning C on, etc.  In a perfect world, you would have a power sequencer that would do that, with programmable delay times for the different stages.   The benefit when tube equipment is are is it warms up so slowly that transients on the inputs have settled out before it can affect the output.

Likewise when powering down, you would turn D off first, wait until all its power-delivering capability had gone, then power C down, etc.  And again ideally, there should be delays in between the turn off points.  The problem with tubes there is they can keep warm for a while and glitches at the input can be amplified to the output.

The reason the Vent wants the inputs connected before the power is to prevent glitches on the inputs from over-driving active powered-up circuits inside the Vent.  When you apply power with stable inputs, things are much better behaved.  So there is generally a race going on when power is applied simultaneously to all connected equipment.  If amplifying or processing equipment starts up and is ready to go before the input stage (from a previous piece of equipment) has stabilized, you will get an input transients, which just maybe could damage the equipment.

Lou

>________________________________
> From: "zakemo@AOL.com"
>To: CloneWheel@yahoogroups.com
>Sent: Sunday, August 12, 2012 8:00 PM
>Subject: Re: [CWSG] Gear and power strips
>
>The instructions I received with my Vent made it a point that  everything
>should be plugged into it before plugging the power cord into it. Not  sure
>why this is but they seemed to stress it. ???  ORF Bob
>

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