The Isobar 110VAC EMI Filters on your Home Theatre and Net Boards might also
help.
https://www.ebay.com/itm/Tripp-Lite-Isobar-6-Outlet-Surge-Protector-w-Tel-Fax-Modem-Protection-3300-J/381632896929?_trkparms=aid%3D555019%26algo%3DPL.BANDIT%26ao%3D1%26asc%3D41375%26meid%3Dd917c15b095f4cdf8108c38f2f1e45b2%26pid%3D100508%26rk%3D1%26rkt%3D1%26&_trksid=p2045573.c100508.m3226
Use one here as well, keeps RF out of my Network stuff
Michael Aust
ava622@verizon.net
-----Original Message-----
From: Stephanie WX3K via RFI <rfi@contesting.com>
To: Joe <w7rkn.7@gmail.com>
Cc: rfi <rfi@contesting.com>
Sent: Sat, Dec 2, 2017 10:03 am
Subject: Re: [RFI] RFI In My Shack
A number of questions come to mind in order to understand your situation.
Attempting to provide a solution for your printer directly is not addressing
the root cause.
1) power level diffential between the Henry and L7 to understand the
differences in RF fields levels generated from your antennas.
2) proximity of antennas and orientation to the shack
3) differences how the Henry and L7 are wired to house circuits
4) Extent of AC bypassing on both amps
5) Shack grounding/bonding detail. Reradiation from wiring may be partially to
blame due to resonant lengths of said extraneous shack/house wiring
Stephanie WX3K
> On Dec 2, 2017, at 12:25 PM, Joe <w7rkn.7@gmail.com> wrote:
>
> A little different question. Perhaps some suggestions here:
>
> I have a new amplifier in the shack, a Drake L7, that is being used in place
> of a European version of the Henry 2K D Classic.
>
> The Henry ripped the shreds out my sound system's sub-woofer, both in the
> Home theater room and in the den.
>
> I collect and restore Drake equipment and acquired this L7 amplifier with a
> modified power supply. (Has a Peter Dahl transformer that outputs 3600
> volts, instead of 2600.
>
> In any case, the Henry has never affected anything else in the house.
>
> The L7, however, is another story. It is 'clean' in the shack: I.E.: No RF
> in the shack.
>
> But, somehow it is getting RF into the network, via the net cable, and it is
> smoking the net board in my HP, all-in-one color laser printer. I have had
> to replace the net board already as the RF is literally shorting out
> components on the board. Fortunately, the board is inexpensive, but a bit
> of a bother to replace it.
>
> My question to the group: Is there any way to filter/stop/shield the
> network cabling from RF, to keep it from getting into the printer?
>
> Thanks in advance.
>
> Joe - W7RKN
>
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