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Re: [Amps] Heathkit HA-14 filaments

To: Bill Fuqua <wlfuqu00@uky.edu>
Subject: Re: [Amps] Heathkit HA-14 filaments
From: Joe Giacobello <k2xx@swva.net>
Reply-to: k2xx@swva.net
Date: Tue, 31 May 2005 12:35:29 -0400
List-post: <mailto:amps@contesting.com>
Bill, I once used one for about a year.  I never got any reports of a 
bad CW note nor did I detect any problem when I personally monitored the 
signal.

73, Joe

Bill Fuqua wrote:

>     To my surprise I found that the filaments of the HA-14 were not driven 
>by a center-tapped AC filament transformer when using the AC power supply. 
>I can see that this can be a real source of 60 Hz modulation on a 
>signal.  Has anyone used these for CW using the AC power supply?
>
>73
>Bill wa4lav
>
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