[Amps] 120 hz hum

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Tue, 23 Feb 2010 05:13:47 -0800, "Jim Thomson" <Jim.thom at telus.net>
wrote:

>
>Now if you want to look at the classic Alphas of the 7 series, Ameritron, 
>Ten Tec, Heath, Dentron, Drake, Swan, etc, etc, you will find them in the 
>17-33uF range....duh.
>
>The latest series of some amps have more C as a result of capacitor 
>technology, not engineering brilliance.

REPLY:

Maybe, maybe not. 

Have you considered that with poor regulation, the amp is more likely
to "flat-top", and especially so when tuned up with a pulser and then
used on voice? We don't really know what the engineers were thinking,
except that they now think that the older values were too low. 

73, Bill W6WRT