Re: [Amps] Centurion cooling improvement ideas for AM service

[R.Measures <r@somis.org>]

On Aug 25, 2004, at 7:36 AM, Will Matney wrote:

> Ed,
> Generally, the tube spec sheets have ratings for both ICAS and CCS, 
> where CCS is what you want for this or close (100% AM Service). If the 
> tube is ran CCS at the tube manufacturers ratings it should last 
> because CCS is a 100% duty cycle. The only thing that would hamper it 
> is the transformer being too small and the cooling the amp 
> manufacturer supplied. If the air flow is within the CCS rating of the 
> tube(s), that only leaves the transformer. Generally, most amps are 
> designed around ICAS for a 50% duty cycle using an AM carrier (Some 
> are less!). SSB, is way less than AM so it should raise the rating up 
> to about a 75% duty cycle or so I would think.  ... ...

-  I have heard AM transmissions from amateur radio operators that 
droned on and on for over 20 minutes,  One wonders when such operators 
will start taking on-the-air telephone calls from short-wave listeners? 
 CDs of such sessions could be sold over the counter at drug stores as 
a potent sleep-aid.

Richard L. Measures, AG6K, 805.386.3734.  www.somis.org

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