[Amps] QEX Innovative Tube Linear?

[R L Measures]

On Jul 8, 2006, at 6:16 AM, Peter Chadwick wrote:

>> From memory, sweep tubes are rated for several kV of plate volts  
>> during the pulse, so breakdown (flashover) isn't a problem per  
>> se. . This suggests that provided you don't exceed the  
>> dissipation, you can run a high plate volts and have a good swing  
>> above the knee of the curve, and arguably, better linearity.
> Exceeding the plate dissipation is another matter altogether, and  
> is I suspect, done at the expense of tube  life if not linearity.  
> It is amazing what you can get away with tubes though: remember the  
> early radars that really hammered tubed not designed for pulse  
> service.

Good point, Peter.  Keydown / AØ / NØN / is almost as far from SSB  
voice service as is pulse radar service  -- which is why I prefer to  
tune up for SSB service with a 30% duty-cycle  tuning-pulser or with  
50wpm dits.

> 73
> Peter G3RZP
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R L MEASURES, AG6K. 805-386-3734
r at somis.org