mike kendall wrote:
> With a gain of approximately 16dB, it could have about 67 watts going into a
> shunting resistor and still get 1KW out of a pair with a 100 watt
> transceiver. I think this is similiar to the way they do it on the the
> Ameritron ALS-600 by looking at the size of the input resistor on that amp.
> The 5400pF is a rating at 1mhz. Further down the spec sheet they have input
> impedances for 2,13.5, 27, 40 mhz and they look to be substantially different
> with ratings that are shunted by a 25ohm input resistor. I am calling the
> company tonight for more information as they do advertise it for broadband HF
> amplifiers on the news release from a few years ago.
> 73,
> Mike
The 5400pF is measured at 1MHz, but it's not going to change that much
at other frequencies, and at the upper end of hf Zi looks like a half
decent short circuit. Maybe matching at the top end and then frequency
tailoring an input attenuator will work. Given the Zl figures to get the
750W output, I expect a heck of a lot will be sacrificed to achieve much
bandwidth - but a joy to fire up on topband by the looks of it!
Steve
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