[Amps] Bandwidth tests

[Michael Tope]

----- Original Message ----- 
From: "Tom W8JI" <w8ji at 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........................