[R-390] Standy or Off?

[Cecil Acuff]

Charles,

        Standby is not recommended the unloaded power supply voltage rises 
to dangerous levels due to our line voltage being higher today than it was 
back in the 50's.

I personally think that leaving the set on is probably best.  Powering it on 
and off subjects the power supply to stresses each time it's powered up and 
the thermal cycling takes it's toll as well.  The company I work for has 
about 1000 desktop PC.s and they have published a recommendation to all 
employees that those PC's should be left on 24/7 because lower failure rates 
have been documented in machines that are not electrically and thermally 
cycled.  I would think that would carry over to other electronic devices as 
well.

The 390 series was designed to run 24/7 and if you don't mind the cost of 
electricity that's what I would recommend.

As far as your ballast tube failures....The ballast tube undergoes it's most 
stress at power up.  After that it should only have a barely perceivable 
glow.  If it's brighter than that during run you may have a problem with one 
of the tubes it regulates.  Also what is your line voltage...it may be 
excessively high.  You may want to invest in a variac and set the line 
voltage to 115...everything will last longer that way....

Cecil...
----- Original Message ----- 
From: "charles bolland" <ka4prf at peoplepc.com>
To: <r-390 at mailman.qth.net>
Sent: Saturday, February 26, 2005 6:54 PM
Subject: [R-390] Standy or Off?


> Hi all,
>
> I've burnt out a couple of Ballast tubes over the months and I am a little
> "gun" shy now.  I don't want to ware out other tubes in my set, so I am
> wondering which will prolong the life of any tubes in my receiver best of
> the three following options?
>
> 1. Completely off when not in use - thinking about turning the set on and
> off all of the time.
> 2. Standby when not in use - thinking some tube still burning all of the
> time.
> 3. On when not in use - thinking all of the tubes are hot all of the time.
>
> Any comments will be appreciated.
>
> Chuck
>
>
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