** Not linear is OK for SSB? The difference in S-units between an
amplifier that 60% efficient and an amplifier that is 90% efficient - for
the same power input - is 0.3 S-units, or 1.76db.
>http://hawkins.pair.com/wabcnow.shtml should give you a heads up on the
>operation of these broadcasting beasts.
>they are totally digital, and uses square waves for RF genoration...they
>are not linear..but they are 90% efficient......steven, W4IIV
>
>"R.Measures" <r@somis.org> wrote:
>
>
>>This couldn't be farther from the truth...
>
>** Dr. Schmidt. Please explain why high-efficiency BC-type designs are
>suitable for applications where linear operation over a range of
>frequencies is required. Tnx
>>
>>Sincerely,
>>
>>Dr. William J. Schmidt, II K9HZ
>>Trustee of the North American QRO - Central Division Club - K9ZC
>>
>>"Collector of Edison Wind-up Phonographs... Do you have one for me?"
>>Email: bill@wjschmidt.com
>>Alternate Email: wmschmidt@charter.net
>>WebPage: www.wjschmidt.com
>>
>>
>>
>>----- Original Message -----
>>From: "R.Measures"
>>To: ; " AMPS"
>>Sent: Monday, December 15, 2003 10:25 AM
>>Subject: Re: [Amps] Big Solid State Power Amplifiers
>>
>>
>>>
>>>
>>> >I don't know what designs you are familiar with, but combiner losses
>>don't
>>> >usually impact significantly on efficiency. That's why they are used in
>>> >high-efficiency AM BC transmitters...
>>> >
>>> **High-efficiency BC-type designs are not suitable for applications where
>>> linear operation over a range of frequencies is required.
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>_______________________________________________
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>
>
>STEVEN GRANT W4IIV
>
>
>---------------------------------
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