[R-390] line filter for EAC R390A

[Richard W. Solomon]

Correct me if I am wrong, but wasn't the function of the Line Filter to
keep noise from entering the receiver AND not allowing anything to
re-radiate out of the receiver ?

In both cases, if operated from the AC Power Lines and in a "friendly"
country, doesn't that make the filter unnecessary ? Why not just remove
it and solve all your problems ??

The Purists in the group can ignore this form of heresy !!

73, Dick, W1KSZ

-----Original Message-----
>From: Roy Morgan <k1lky at earthlink.net>
>Sent: Jul 28, 2009 9:44 AM
>To: Graham Baxter <graham at delphe.co.uk>
>Cc: R-390 at mailman.qth.net
>Subject: Re: [R-390] line filter for EAC R390A
>
>
>On Jul 28, 2009, at 11:50 AM, Graham Baxter wrote:
>
>> I isolated my line filter from the chassis using power transistor  
>> insulated
>> mounting bushes....it cures the GFI (RCD in English) problems, and  
>> does
>> not much change the original appearance.
>
>Graham,
>
>HOWEVER, it does introduce the possibility of a dangerous situation.  
>Should one of the bypass caps in the original filter fail shorted,  
>full line voltage would be on the filter case. A future hapless owner  
>might not know this and get electrocuted.
>
>This situation is very similar to the "cure" offered in Hollow State  
>News years ago for a leaking B+ filter choke in the  SP-600.  They  
>suggested to insulate the choke case (metal) from the chassis.  This  
>is very dangerous, especially there where the leakage fault is known,  
>is present, and the voltage is more or less full B+.
>
>Roy
>
>
>Roy Morgan
>k1lky at earthlink.net
>529 Cobb St.
>Groton NY, 13073
>Home: 607-898-3607
>Cell: 301-928-7794
>
>
>
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