----- Original Message -----
From: "Tom W8JI" <w8ji@w8ji.com>
> Joe,
>
> In order for ALC problems to be measured, you have to let
> the ALC actually do something meaningful. Any test that
> holds the ALC steady, such as a white noise or two-tone
> test, will not test ALC dynamics at all. The fact you
> overdrove the ALC simply means you saturated the ALC control
> system and effectively disabled it. It is no surprise a
> saturated radio gets wide.
>
> The same is true for anyone testing a linear amplifier. A
> linear amplifier that is terrible for dynamic regulation of
> power supplies, be they bias, HV, or screen, will almost
> always look significantly better when tested with a steady
> average power source like a noise test or a two-tone test.
>
I was figuring a white noise (gaussian) source would have
large peak voltage excursions when I made that suggestion,
Tom. Perhaps white noise AM modulated at a syllabic rate
would be more appropriate.
73, Mike W4EF........................
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|