[Amps] Heathkit HA-14 filaments

[Joe Giacobello]

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
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
>  
>