[Amps] Can I cool too much the tubes?

[Rudy Bakalov]

Rob,
I am the second owner of this amp and don't know its age. It is the grey model. I can certainly look up the serial number when I am back to VE3 where my contesting QTH is.
As far as mode goes, my very first post noted that this is with respect to RTTY where I can't really run it longer than 30 min at full power.  I am not a SSB guy; CW runs all day long at full power. Standby or not, some sort of protection kicks in when the amps gets too hot and the orange STBY LED is on.
So now my dilemma is if I should run low power, without the amp, or high power at only 400 W during the upcoming CQWW RTTY contest :-) Or time for an Alpha :-)
Rudy N2WQ
--- On Thu, 8/19/10, Rob Atkinson <ranchorobbo at gmail.com> wrote:

From: Rob Atkinson <ranchorobbo at gmail.com>
Subject: Re: [Amps] Can I cool too much the tubes?
To: amps at contesting.com
Date: Thursday, August 19, 2010, 4:28 PM

Rudy,

Is this automatic standby mode protection a new thing with the
Centurion?  Mine is around 10 years old and it has nothing like this.

When did you get yours?

N.B.  When you guys write about transmittion time at some power level,
it is very important that you specify the mode.

There is a huge difference between "1.5 KW no time limit (operating
SSB) and 1.5 KW no time limit carrier.

SSB is the "Coors Light" of transmission modes.

73

Rob
K5UJ


On Wed, 18 Aug 2010 10:34:58 -0700 (PDT), Rudy Bakalov
<r_bakalov at yahoo.com> wrote:

>Experience trumps specs. The amp goes into standby mode after about 30 minutes
>running at full power, i.e. about 1200 W.  If I run it at around 400-500 W it
>is fine.
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