[R-390] R-390A and GFI

[Barry]

I tend to agree with either eliminating the filter like you did with the Delrin block or gutting and straight-lining the old filter.  I doubt there's much need for the line filter in a residential setting.

That said, I went to extreme measures to preserve/rebuild the line filter in my current R390.  That was a PAIN!

Barry - N4BUQ

> Attached are a couple pics from one of my 390A's. For this one I made a Delrin
> block and used screws as studs to feed the power in and then attached it to an
> off the shelf line filter. I fabricated a mount for the line filter as well.
> 
> On another unit I disassembled the line filter and gutted it. Connected the
> input to the output internally then sealed it back up and reinstalled.
> 
> Another I opened up and replaced the caps with AC line caps.
> 
> Experimenting with different approaches as you can tell.
> 
> Tom
> W3TA
> 
> -----Original Message-----
> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On Behalf Of
> gary.biasini at shaw.ca
> Sent: Monday, March 25, 2024 8:15 PM
> To: Barry Scott <72volkswagon at gmail.com>; hamfish at comcast.net
> Cc: R-390 at mailman.qth.net
> Subject: Re: [R-390] R-390A and GFI
> 
> Barry,
> 
> Do you have any pictures?
> 
> Gary I. Biasini
> ________________________________
> From: Barry Scott <r-390-bounces at mailman.qth.net> on behalf of Barry Scott
> <72volkswagon at gmail.com>
> Sent: Monday, March 25, 2024 6:00:37 PM
> To: hamfish at comcast.net <hamfish at comcast.net>
> Cc: R-390 at mailman.qth.net <R-390 at mailman.qth.net>
> Subject: Re: [R-390] R-390A and GFI
> 
> Years ago, I made some aluminum adapter plates that mounted on the existing
> threads where FL-101 was.  It had a properly-shaped hole that accepted a modern
> line filter with an IEC connector.  Clean, no-mod update.
> 
> Thanks,
> Barry
> 
> 
> On Mon, Mar 25, 2024 at 5:44 PM <hamfish at comcast.net> wrote:
> 
>> Good Afternoon Jim,
>>
>> Another thought comes to mind, do you need the original R390/A line
>> filter (FL101)? Most of today's interference is by way of the antenna input,
>> RFI.
>> Line noise is better dealt with by finding that source and unplug it.
>> FL101 is what trips GFIs because of leakage of the caps inside of said
>> line filter. So power the R390/A (with no antenna connected) through
>> an outlet that does not have a GFI, is there noise? If there is no
>> noise, at this time a FL101 or equivalent is not needed. Remove FL101
>> and be done with it. If there is noise, the search begins. Might be
>> easiest to unplug the source, maybe ferrite thingies, or a line filter
>> mentioned by the rest of the long distant R390/A service dept.
>>
>> If noise is by way of the antenna input....................welcome to
>> today's world.
>>
>> Regards,
>> Craig
>>
>> -----Original Message-----
>> From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On
>> Behalf Of Jim
>> Sent: Monday, March 25, 2024 9:58 AM
>> To: R-390 at mailman.qth.net
>> Subject: [R-390] R-390A and GFI
>>
>> I'm in a new location and when I plugged in my R-390A it tripped the
>> GFI's in the room.
>> I see that there is a modification to the 390 AC filter, but time is
>> short and I would like to get it on the air.
>> Is there a simple way to keep the 390 tripping GFI's?
>>
>> TNX
>> Jim
>> WB2TPS
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