[R-390] R-390A and GFI

Tue Mar 26 10:45:38 EDT 2024

Hi

Yup

They now do CNC as well. I have not tried that side of their offerings so
I have no idea how cost competitive they are for CNC. For 3D printing and
PCB assembly they are crazy cheap.

Bob

> On Mar 26, 2024, at 10:28 AM, Barry <n4buq at knology.net> wrote:
> 
> 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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