[R-390] R-390A and GFI

Barry n4buq at knology.net
Tue Mar 26 00:41:49 EDT 2024


The method I used did not require modifying the back panel.  The IEC socket cleared the hole without having to enlarge it.  I'll have to dig through my box of "stuff" I still have from when I was working on that.  I may still have one of the adapter plates.

Thanks,
Barry - N4BUQ

> Perry wrote up a doc on this subject.  It's on our website in the 'Repair
> Tutorials*' *section of the 'references' page.  It's worth looking at.
> Here's  a link: Replacing FL101 in the R-390A.pdf
> <https://www.r-390a.net/Replacing%20FL101%20in%20the%20R-390A.pdf>
> 
> Regards, Larry
> 
> On Mon, Mar 25, 2024 at 9:02 PM <gary.biasini at shaw.ca> wrote:
> 
>> Barry,
>>
>> Thanks for taking the time to reply.
>>
>> -----Original Message-----
>> From: Barry <n4buq at knology.net>
>> Sent: Monday, March 25, 2024 6:29 PM
>> To: gary biasini <gary.biasini at shaw.ca>
>> Cc: Barry Scott <72volkswagon at gmail.com>; hamfish at comcast.net; R-390
>> Mailing List <R-390 at mailman.qth.net>
>> Subject: Re: [R-390] R-390A and GFI
>>
>> Gary,
>>
>> That was probably 20 years ago.  If I did have pictures, I'm pretty sure I
>> couldn't find them anymore.  It was a fairly simple little plate, though.
>> It would be pretty easy to make with a milling machine or, possibly a good
>> file.
>>
>> Thanks,
>> Barry
>>
>> > 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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