em. The key is good modem, like a 2wire
> > modem, and if that doesn't work, a really sharp roll-off filter.
> >
> > Tossing iron at the CAT5 cables is OK, but it is not often useful on
> > the Telco side.
> >
> > 73 Tom
> >
> > - Original Me
On 7/17/2012 3:38 AM, N1BUG wrote:
> What about the drop from the pole to my NID? That is not twisted.
That's likely a contributor.
73, Jim K9YC
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
On 17/07/2012 16:45, Tom Boucher wrote:
> On the recommendation of John G3PQA, I recently changed my router from a
> D-Link unit to an ADDON NWAR-3670 which appears to have much better RFI
> immunity. I'm not getting any dropouts at all now and I do not have an OZ1CTK
> type filter in line, jus
Herb,
On the recommendation of John G3PQA, I recently changed my router from a D-Link
unit to an ADDON NWAR-3670 which appears to have much better RFI immunity. I'm
not getting any dropouts at all now and I do not have an OZ1CTK type filter in
line, just some ferrite rings of unknown origin on
. The key is good modem, like a 2wire
> modem, and if that doesn't work, a really sharp roll-off filter.
>
> Tossing iron at the CAT5 cables is OK, but it is not often useful on
> the Telco side.
>
> 73 Tom
>
> - Original Message - From: "Herb Schoenbohm&qu
With AT&T Uverse I had the experience of adding common mode chokes (#31
ferrite) on a long run of cat 5 and having it knock down the desired
signal. The cat 5 is not all that well balanced, and putting the hurts on
the unbalance also knocks down the main signal which was marginal to start
with.
I
Hi,
I have this knock out problem, tried ferrite beads, ferrite cores, coils,
vodoo, black magic...
I came to conclusion that some devices are really built not caring for RF
exposure. Two different revisions of a Speedstream 2400 modem behave
completely different. One could whitstand my 160m TX s
l Message -
From: "Herb Schoenbohm"
To: "TopBand List"
Sent: Monday, July 16, 2012 8:57 PM
Subject: Topband: DSL knocks out when on TopBand
> Fortunately I have a Wi-Max service that is immune from RFI but I
> frequently use a DSL service for remote control with guest
On 07/16/2012 10:26 PM, Jim Brown wrote:
> This is a differential mode filter, so it suggests that some or all of
> the telco cable feeding the modem isn't twisted pair, or isn't very good
> twisted pair. SO -- another solution could be replacing that poor cable
> with CAT5, using the pair within t
On 7/16/2012 10:36 PM, W2RU - Bud Hippisley wrote:
> Herb (& others) —
>
> I struggled to keep my 160- and 80-meter RF out of my DSL equipment for a
> number of years. Multiple turns of all cables in/out of the DSL modem
> (Siemens Speedstream) on #31ferrites, etc. The best progress occurred wh
> My problem is that when I try to operate on 160 the DSL
> crashes. I have tried many Type 31 3 inch ferrite rings
> with 20 turns on both the phone line and the Cat 5 cable
> from the Zhone modem but even at 200 watts the
> DSL looses sync.
Herb,
The problem usually comes from the wal
Herb (& others) —
I struggled to keep my 160- and 80-meter RF out of my DSL equipment for a
number of years. Multiple turns of all cables in/out of the DSL modem (Siemens
Speedstream) on #31ferrites, etc. The best progress occurred when I wrapped
the modem in common kitchen aluminum foil and
On 7/16/2012 6:10 PM, N1BUG wrote:
> I had exactly the same problem, tried the same "cures" you have. The
> problem is ADSL uses frequencies up to 1.1 MHz. The modems are
> easily overloaded by 1.8 MHz RF. Nothing worked until I built this
> simple filter designed by OZ1CTK:
Looks great, Paul. Th
st"
Sent: Monday, July 16, 2012 4:57 PM
Subject: Topband: DSL knocks out when on TopBand
> Fortunately I have a Wi-Max service that is immune from RFI but I
> frequently use a DSL service for remote control with guest ops during
> contests. The DSL is more reliable in so much is
> My problem is that when I try to operate on 160 the DSL
> crashes. I have tried many Type 31 3 inch ferrite rings
> with 20 turns on both the phone line and the Cat 5 cable
> from the Zhone modem but even at 200 watts the
> DSL looses sync.
Herb,
I had exactly the same problem, tried the
Fortunately I have a Wi-Max service that is immune from RFI but I
frequently use a DSL service for remote control with guest ops during
contests. The DSL is more reliable in so much is I get 1.5 Mbps up and
down all the time and every time. (The Wi-Max at times gives me CW
hick-ups and althou
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