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Re: [Amps] 120 hz hum

To: <amps@contesting.com>
Subject: Re: [Amps] 120 hz hum
From: "Bill, W6WRT" <dezrat1242@yahoo.com>
Reply-to: dezrat1242@yahoo.com
Date: Tue, 23 Feb 2010 20:42:44 -0800
List-post: <amps@contesting.com">mailto:amps@contesting.com>
ORIGINAL MESSAGE:

On Tue, 23 Feb 2010 05:13:47 -0800, "Jim Thomson" <Jim.thom@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
 
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