I did the same for my 30L1 for a decade which always ran REALLY hot to the
touch. The muffin fan really reduced overall temp
Jay
W2IJ
----- Original Message -----
From: "Patrick Barthelow" <apolloeme@live.com>
To: <r_bakalov@yahoo.com>; <amps@contesting.com>; <ranchorobbo@gmail.com>
Sent: Thursday, August 19, 2010 9:40 PM
Subject: Re: [Amps] Can I cool too much the tubes?
>
>
> Does anyone have a schematic for the amp under discussion, or perhaps
> looked to see the sensor device that senses excessive heat to
> trigger a shutdown? I am curious what they sample for the heat trip
> function. And, if it is an internal sensor for the transformer core, it
> might not help, but perhaps some extra muffin fans, mounted external or
> internal to the amp could add enough cooling to extend its duty cycle on
> RTTY.
>
> Back in the olden days, as a kid, I used to sit a muffin fan right on top
> of my Drake TR-4 Finals Cage, drawing upward, and the whole radio became
> and ran dramatically cooler.
>
> Best Regards,
> 73, de Pat Barthelow AA6EG
>
>
>> Date: Thu, 19 Aug 2010 20:16:13 -0700
>> From: r_bakalov@yahoo.com
>> To: amps@contesting.com; ranchorobbo@gmail.com
>> Subject: Re: [Amps] Can I cool too much the tubes?
>>
>> 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@gmail.com> wrote:
>>
>> From: Rob Atkinson <ranchorobbo@gmail.com>
>> Subject: Re: [Amps] Can I cool too much the tubes?
>> To: amps@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@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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>
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