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Dish/Direct TV RFI?

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Bob McGraw - K4TAX

Dish/Direct TV RFI?

For multiple reasons we dumped satellite TV. Cable service was gone 10
years ago.

While the DSS receiver and its associated power supply didn't give me
any issues, I found the plastic box in which the receiver was contained
offered little to no shielding from my HF transmitters. Specifically
the remote control receiver, being an RF remote, must have a front end
as broad as a barn door. Even when the remote control method was
switched to IR, the remote receiver was still active in the box. My
solution was to wrap the entire receiver, except a small front corner
where the IR receiver was located, in aluminum foil. No amount of
ferrites on the input, power and output would resolve the issue. It
looked a bit crude but it worked.    My wife would certainly let me know
when the thing changed channels or turned on and off by itself during
her Pay Per View movies.

The straw which made the final decision to dump satellite TV was weather
related signal loss, along with their customer service. Either thunder
storms in the summer or snow and ice in the winter where I've had to
sweep snow and break ice off of the dish to restore the signal.

Fortunately we are in an area, although basically rural, where our phone
company provides not only phone, but internet, and HD TV, by underground
fiber to the house. They run dedicated CAT 5E cable to each of the
TV's {3} and another to my wireless router from the fiber termination
on the side of the house. They also provide battery back-up for the
fiber termination.    The bottom line, their system is totally immune to
RF on any HF band and any power level, and we no longer have to worry
about WX related outages. And with the expanded package it is costing
less than the Direct TV service.   I think it is a win win situation. I
wish everyone had a system such as this.

73

Bob, K4TAX

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John Huggins, kx4o

Re: Dish/Direct TV RFI?

You are, of course, absolutely correct Jim. Know that one model of the sat
receiver uses an RF remote of some sort that many think is the culprit.

Sadly the response from the, understandably RF clueless, sat help lines is
kind of like going to a doctor with the plea "it hurts to do this" and
response of "well don't do that."

I suspect nothing will change much until a 40m signal affects the sat
systems of the ham's neighbors resulting in a Part 15/97 brawl.

On Wed, March 14, 2018 22:47, Jim Brown wrote:

> Problems like this are the result of design defects in the cable modem.
> It should be possible to solve problems of this sort by winding multiple
> turns of both the coax and the power cable #31 or #43 Fair-Rite toroids.
> See
>
> http://k9yc.com/KillingReceiveNoise.pdf
>
> for part numbers and guidelines for winding. While the app note discusses
> RX noise radiated from gear like this, the cures are the same
> for both.
>
> AND -- because it's the result of a defective modem (i.e. a bad design),
> ALWAYS call the vendor and tell them to fix it.
>
> 73, Jim K9YC

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Jim Low man

Re: Dish/Direct TV RFI?

I’m wondering how much worse the problem will be as DirecTV goes to this new technology that’s being advertised on TV-something about a wireless receiver. I’ll have to pay more attention. It sounds like something that the girlfriend may want to wait for. Right now her equipment is first-generation, and she would like to have a DVR with larger capacity and a 4K-capable receiver for whenever that becomes available.

72/73 de Jim-AD6CW

> On Mar 15, 2018, at 8:24 AM, John Huggins, kx4o <[hidden email]> wrote:
>
> You are, of course, absolutely correct Jim. Know that one model of the sat
> receiver uses an RF remote of some sort that many think is the culprit.
>
> Sadly the response from the, understandably RF clueless, sat help lines is
> kind of like going to a doctor with the plea "it hurts to do this" and
> response of "well don't do that."
>
> I suspect nothing will change much until a 40m signal affects the sat
> systems of the ham's neighbors resulting in a Part 15/97 brawl.
>
>> On Wed, March 14, 2018 22:47, Jim Brown wrote:
>> Problems like this are the result of design defects in the cable modem.
>> It should be possible to solve problems of this sort by winding multiple
>> turns of both the coax and the power cable #31 or #43 Fair-Rite toroids.
>> See
>>
>> http://k9yc.com/KillingReceiveNoise.pdf
>>
>> for part numbers and guidelines for winding. While the app note discusses
>> RX noise radiated from gear like this, the cures are the same
>> for both.
>>
>> AND -- because it's the result of a defective modem (i.e. a bad design),
>> ALWAYS call the vendor and tell them to fix it.
>>
>> 73, Jim K9YC
>
>
> ______________________________________________________________
> Elecraft mailing list
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> Post: mailto:[hidden email]
>
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Bob Nielsen-4

Re: Dish/Direct TV RFI?

This is getting a bit off-topic, but Directv has larger hard drives and
even add-on extenders up to 4 TB, as well as a dedicated 4K channel
plus on-demand 4K. need a DVR server plus a 4K client box.

Bob. N7XY

On 3/15/18 9:26 AM, Jim Low man wrote:

> I’m wondering how much worse the problem will be as DirecTV goes to this new technology that’s being advertised on TV-something about a wireless receiver. I’ll have to pay more attention. It sounds like something that the girlfriend may want to wait for. Right now her equipment is first-generation, and she would like to have a DVR with larger capacity and a 4K-capable receiver for whenever that becomes available.
>
> 72/73 de Jim-AD6CW
>
>> On Mar 15, 2018, at 8:24 AM, John Huggins, kx4o <[hidden email]> wrote:
>>
>> You are, of course, absolutely correct Jim. Know that one model of the sat
>> receiver uses an RF remote of some sort that many think is the culprit.
>>
>> Sadly the response from the, understandably RF clueless, sat help lines is
>> kind of like going to a doctor with the plea "it hurts to do this" and
>> response of "well don't do that."
>>
>> I suspect nothing will change much until a 40m signal affects the sat
>> systems of the ham's neighbors resulting in a Part 15/97 brawl.
>>
>>> On Wed, March 14, 2018 22:47, Jim Brown wrote:
>>> Problems like this are the result of design defects in the cable modem.
>>> It should be possible to solve problems of this sort by winding multiple
>>> turns of both the coax and the power cable #31 or #43 Fair-Rite toroids.
>>> See
>>>
>>> http://k9yc.com/KillingReceiveNoise.pdf
>>>
>>> for part numbers and guidelines for winding. While the app note discusses
>>> RX noise radiated from gear like this, the cures are the same
>>> for both.
>>>
>>> AND -- because it's the result of a defective modem (i.e. a bad design),
>>> ALWAYS call the vendor and tell them to fix it.
>>>
>>> 73, Jim K9YC
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]