[Moon-Net] Topband: Ethernet Interference

MR TREVOR DUNNE ei2glb at eircom.net
Tue Sep 10 00:08:56 CEST 2019


Thanks to everyone for the replies, I have to get a few 43 cores and do a bit of winding, 

73
Trevor
EI2GLB

----- Original Message -----
From: "Harald Rester" <harryrester at gmx.de>
To: "topband List" <topband at contesting.com>
Sent: Monday, 9 September, 2019 16:16:34
Subject: Re: Topband: Ethernet Interference

Check out the ground connection of the cable shield as well. My
groundation didn´t exist and caused very strong qrm.

73 and GL

Harry, DH1NBE

Am 09.09.2019 um 16:55 schrieb Dan Edward Dba East edwards:
>   Trevor, for what it's worth, I have found that not all SMPS's (switch mode power supplies ) are the same; some of the small-ish wall warts  spray tons of r.f. hash, others, fairly quiet...one video cam supply was incredibly noisy here; i put a spare netgear supply on it, and poof, gone.. mind you, i'm talking 160m, here..
> If it's easy to swap it out, might be worth a try, anyway...and lots cheaper than ferrite..
> good luck, w5xz, dan
>
>      On Saturday, September 7, 2019, 02:51:46 PM CDT, fmoeves <fmoeves at twc.com> wrote:
>
>   I got rid of mine by winding many turns on 31 mix.First choke was right at very first internet box. And then at the pc. Also everything that enters my pc has 31 mix choke even the power cable.I still get birdies from washing machine and treadmill but I'll get to that sometime. DXEnginering has some boxes that has rj45 connecters on them. Never used them but plug and play. Fred KB4QZH
> -------- Original message --------From: MR TREVOR DUNNE <ei2glb at eircom.net> Date: 9/7/19  2:22 PM  (GMT-05:00) To: 'Moon-net Amateur Radio Moonbounce' <moon-net at mailman.pe1itr.com>, 'topband List' <topband at contesting.com> Subject: Topband: Ethernet Interference Hi AllI seen a post somewhere recently explaining that it was a waste of time putting ferrite on either utp or stp Ethernet cables, I can't remember which, or where I read it, I am trying to remove some birdies on 2m caused by home network,Anyone have any pointers, I have a large amount of cat cable around my house so don't want to replace it with the wrong type,ThanksTrevorEI2GLB_________________Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
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