[R-390] R-390A and GFI

Shaun Merrigan shaun_merrigan at outlook.com
Tue Mar 26 13:05:32 EDT 2024


Thumbs up for JCLPCB.  I have used them for many 3D printing projects, in particular for materials and processes I cannot do at home.  The main downside is the shipping cost, but this can be mitigated if you don't mind waiting a bit longer and you combine orders.

Shaun M.

-----Original Message-----
From: r-390-bounces at mailman.qth.net <r-390-bounces at mailman.qth.net> On Behalf Of Barry
Sent: Tuesday, March 26, 2024 8:29 AM
To: Bob kb8tq <kb8tq at n1k.org>
Cc: R-390 Mailing List <R-390 at mailman.qth.net>
Subject: Re: [R-390] R-390A and GFI

I had some parts made at JLCPCB from black nylon.  Very nice and VERY inexpensive!

Barry - N4BUQ

----- Original Message -----
> From: "Bob kb8tq" <kb8tq at n1k.org>
> To: "thoyer" <thoyer1 at verizon.net>
> Cc: "R-390 Mailing List" <R-390 at mailman.qth.net>
> Sent: Tuesday, March 26, 2024 9:08:36 AM
> Subject: Re: [R-390] R-390A and GFI

> Hi
>
> Done that way ( out of a plastic material), the mount is something
> that could be done with a 3D printer. These days, you just do up a
> file and send it off to be printed. The typical cost is usually less
> than running them off your own printer.
>
> Bob
>
>> On Mar 25, 2024, at 8:44 PM, Tom via R-390 <r-390 at mailman.qth.net> wrote:
>>
>> 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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