[IRCA] Tech notes - CISCO router RFI

[R. Colin Newell]

Chinese made switching power supply for the DPC3825 all-in-one WiFi Cisco 
router generates enough RFI to impact AM-FM radios up to 200’ away as well as 
sensitive test equipment in my Ham shack. 

If you have email or social media, let CISCO know that importing cheap Chinese 
made unfiltered switching supplies is not OK and interferes with important 
radio services. 

Colin Newell - Victoria - B.C. CANADA 
DXer.ca 

> 
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Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

[Russ Edmunds]

Perhaps they ran hybrid only the first day. There were reports of broader 
interference. Certainly one would rather have hiss from 815-825 than from 
810-to 830 :-}



Russ Edmunds

WB2BJH

Blue Bell, PA

Grid FN20id


From: IRCA  on behalf of Brett Saylor 

Sent: Wednesday, July 18, 2018 9:12:41 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

Hmm... that's not what I was seeing Monday night - I only saw digital from
815-825, which I would think was digital mode only. No IBOC sidebands on
adjacent frequencies as would be present in hybrid mode.

Brett
State College, PA

On Wed, Jul 18, 2018 at 8:24 AM, Russ Edmunds  wrote:

> Per credible local reports, they started with the hybrid platform, although
> Scott's report seemed to indicate
> that they had experimental approval for testing full digital. As of
> yesterday they were in hybrid mode, and thus all
> hiss across 810-830. Therefore it's hard to draw conclusions. Perhaps
> Scott's interview will help.
>
>
> Russ Edmunds
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Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

[Brett Saylor]

Hmm... that's not what I was seeing Monday night - I only saw digital from
815-825, which I would think was digital mode only. No IBOC sidebands on
adjacent frequencies as would be present in hybrid mode.

Brett
State College, PA

On Wed, Jul 18, 2018 at 8:24 AM, Russ Edmunds  wrote:

> Per credible local reports, they started with the hybrid platform, although
> Scott's report seemed to indicate
> that they had experimental approval for testing full digital. As of
> yesterday they were in hybrid mode, and thus all
> hiss across 810-830. Therefore it's hard to draw conclusions. Perhaps
> Scott's interview will help.
>
>
> Russ Edmunds
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Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

[Russ Edmunds]

Per credible local reports, they started with the hybrid platform, although
Scott's report seemed to indicate
that they had experimental approval for testing full digital. As of
yesterday they were in hybrid mode, and thus all
hiss across 810-830. Therefore it's hard to draw conclusions. Perhaps
Scott's interview will help.


Russ Edmunds
15 mi NW Phila
Grid FN20id


AM: Modified Sony ICF2010's (3) barefoot w/whip
FM: Yamaha T-80 & T-85, each w/ Conrad RDS Decoder;
Onkyo T-450RDS; Tecsun PL-310 ( 4); Sony XDRS3HD;
modified Sony ICF2010's (2) w/APS9B @ 15';
modified Sony ICF2010 w/whip


On Tue, Jul 17, 2018 at 9:54 PM, Paul B. Walker, Jr. <
walkerbroadcast...@gmail.com> wrote:

> But come on, It's HD... hiss hiss.. dx'ers hate it and if it's all digital
> and doesnt go far past the carrier frequency, DX'ers cant complain about it
> over and over :)
>
> Paul
>
>
>
> On Tue, Jul 17, 2018 at 8:26 PM, Chuck Hutton  wrote:
>
> > No, its very different because there's no need to avoid bothering the
> > analog part.
> >
> > Currently the hybrid system  puts a lot of IBOC energy far from the
> analog
> > carrier where it bothers adjacent analog carriers.
> >
> > The all digital system can put more energy around the carrier frequency
> as
> > it won't bother itself. It will bother far away stations.
> >
> >
> > This is why I am saying to people that they can not use their prior IBOC
> > experiences to imagine what will happen with all digital IBOC.
> >
> >
> > Chuck
> >
> >
> > 
> > From: IRCA  on behalf of Neil Kazaross <
> > neilka...@gmail.com>
> > Sent: Tuesday, July 17, 2018 5:04 PM
> > To: Mailing list for the International Radio Club of America
> > Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station
> >
> > Is this full IBOC still going to be the off channel crap we've suffered
> > with for many years or will it be on channel?  73 KAZ
> >
> > On Tue, Jul 17, 2018 at 6:16 PM, Chuck Hutton  wrote:
> >
> > > Ill suggest a more mundane reason.
> > >
> > > Ibiquity is headquartered in Germantown MD and just like they did their
> > > experimental tests for hybrid mode  not too far away, they are now
> doing
> > > their full IBOC tests nearby.
> > >
> > >
> > >  Chuck
> > >
> > >
> > > 
> > > From: IRCA  on behalf of Les Rayburn <
> > > l...@highnoonfilm.com>
> > > Sent: Tuesday, July 17, 2018 3:21 PM
> > > To: IRCA Radio List - irca@hard-core-dx_com
> > > Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station
> > >
> > > Ah, I understand now.
> > >
> > > I suppose it makes sense as a technical test. Washington, DC is “worst
> > > case” scenario in terms of multi path, signal obstructions, etc. If it
> > > performs well there, it should do even better in most locations.
> > >
> > > We have a client in DC and get there often. I’m supposed to be there
> for
> > > two weeks in August. I’ll be “driving the signal” myself.
> > >
> > >
> > >
> > > 73,
> > >
> > > Les Rayburn, N1LF
> > > 121 Mayfair Park
> > > Maylene, AL 35114
> > > EM63nf
> > >
> > > Member WTFDA, IRCA, NRC. Former CPC Chairman for NRC & IRCA.
> > >
> > > Elad FDM-S2 SDR, AirSpy SDR2, SDRPlay RSP-2 Pro, Sony XDR-F1HD [XDR Guy
> > > Modified], Dennon TU-1500RD, Sangean HDT-1X, Ray Dees RDS Decoders,
> > Korner
> > > 9.2 Antenna, FM-6 Antenna, Kitz Technologies KT-501 Pre-amps, Quantum
> > > Phaser, Wellbrook ALA1530 Loop, Wellbrook Flag, Clifton Labs Active
> Whip.
> > >
> > > “Nothing but blues and Elvis, and somebody else’s favorite song…”
> > >
> > >
> > > > On Jul 17, 2018, at 2:22 PM, Scott Fybush  wrote:
> > > >
> > > > Some of this I can answer even before interviewing Dave - the format
> is
> > > called "The Gamut," which is a true "we play everything" variety mix
> that
> > > goes back as far as the 1940s. It's been running on WWFD for the last
> few
> > > years, as well as on HD2 subs of co-owned WTOP in Washington and its FM
> > > relay out in Virginia.
> > > >
> > > > It's important to note here that the format isn't especially
> important
> > > to what's essentially a technical test. The whole reason they're using
> > the
> > > WWFD AM signal for this is because it's not doing anything,
> > business-wise,
> > > for them. Most Gamut listeners are tuned into the HD2s or the analog FM
> > > translators that relay them, or are on the stream.
> > > >
> > > > The idea here is to get a real-world sense of how the AM all-digital
> > > mode works, and I expect a lot of engineers will be out this summer
> > driving
> > > the signal, taking measurements and learning how well their theoretical
> > > predictions match reality. (I hope to join them at some point!) I doubt
> > > there will be much promotion to general audiences, though I'm sure
> > they'll
> > > welcome any feedback they get.
> > > >
> > > >
> > > >
> > > > On 7/17/2018 3:12 PM, Les Rayburn wrote:
> > > >> Scott,
> > > >> Thank you for this opportunity. I’m interested in knowing what
> format
> > > 

Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

[Patrick Martin]

With the way the NAB was pushing HD Radio years ago, I am surprised it took 
this long, from the early 90s when Bob Rusk was writing about it in RW.  I 
doubt the station will have many listeners as who has an HD radio? Few do, even 
not a lot in auto radios. I find the Sony HD radios in thrift stores these 
days. I have two. Here on the OR coast I can hear KSL 1160 in HD off the 
Eastern Beverage at times. I presume once stations decide to go all digital, 
analog DXing will be a thing of the past. A few more FMs I get in HD as they 
seem to get out better.


Patrick Martin Seaside OR KGED QSL Manager



From: IRCA  on behalf of Chuck Hutton 

Sent: Tuesday, July 17, 2018 11:03 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

Is it?


Since they have no analog, there's no reason for them to use the hybrid mode of 
IBOC which has both analog and digital.  That is what causes the interference 
to adjacent chanbnels and limits the IBOC coverage a bit.


If they use the all digital mode, there are  different expectations for 
interference and coverage amd we'll have to re-analyze things.


But I'm unaware as to whether all digital IBOC has FCC approval.


Chuck



From: IRCA  on behalf of Mark Mobile 

Sent: Tuesday, July 17, 2018 7:27 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

It's not WWFD 820; it's "WWFD 800--810--820--830--840"

:-))


Cheers!

Mark Durenberger, mobile


-Original Message-
From: Russ Johnson
Sent: Tuesday, July 17, 2018 8:46 AM
To: Mailing list for the International Radio Club of America
Subject: Re: [IRCA] WWFD 820 Becomes First All-Digital AM Station

Thanks for the update Brett

On Tue, Jul 17, 2018 at 9:31 AM Brett Saylor  wrote:

> 1500 WFED isn't on IBOC right now, and I don't recall it being on any time
> recently. According to Barry's site it's been off since 2007.
>
> I just checked my overnight recordings and 820 is solid IBOC hash from 815
> to 825 kHz, from sunset to sunrise. I can get around most IBOC noise by
> tuning the opposite LSB or USB but this covers the entire frequency. 820
> is
> now pretty useless as a nighttime frequency. Frederick is 100 miles from
> here.
>
>
> Brett Saylor
> State College, PA
>
>
>
> On Tue, Jul 17, 2018 at 9:02 AM, Russ Johnson  wrote:
>
> > Let’s hope so.
> >
> > I was unimpressed even with HD FM coverage. Too many drop outs.
> >
> > Is 1500 in DC still iboc?
> >
> > Russ Johnson
> >
> > Sent from my iPhone
> >
> > > On Jul 17, 2018, at 8:35 AM, Russ Edmunds  wrote:
> > >
> > > There will now be just digital hash where the AM signal would have
> been..
> > > But the rush into this ignores some important points -
> > >
> > > 1. How many car radios are capable of receiving these transmissions ?
> My
> > > understanding was that carmakers were reducing, not increasing the HD
> > > capability as standard equipment because it hadn't caught on.
> > > 2. How many listeners are driven off by the low range AM signal -
> > > which
> > > will continue and perhaps be worse - and not by analog
> > > 3. How many people actually listen on AM anyway and would this change
> > them ?
> > >
> > > I predict this adventure will fail.
> > >
> > >
> > > Russ Edmunds
> > > 15 mi NW Phila
> > > Grid FN20id
> > > 
> > >
> > > AM: Modified Sony ICF2010's (3) barefoot w/whip
> > > FM: Yamaha T-80 & T-85, each w/ Conrad RDS Decoder;
> > > Onkyo T-450RDS; Tecsun PL-310 ( 4); Sony XDRS3HD;
> > > modified Sony ICF2010's (2) w/APS9B @ 15';
> > > modified Sony ICF2010 w/whip
> > >
> > >
> > >> On Mon, Jul 16, 2018 at 9:37 PM, Les Rayburn 
> > wrote:
> > >>
> > >> Here’s some news that I’m not sure how to feel about:
> > >>
> > >> https://news.radio-online.com/cgi-bin/rol.exe/headline_id=n35675
[https://images.radio-online.com/images/graphics/radionewswire.gif]

WWFD 820 AM Becomes First All-Digital AM 
Station
news.radio-online.com
In Washington DC, WWFD 820 AM The Gamut will be the first full time, 
all-digital AM radio station in the U.S. In an effort to keep up with the 
ever-evolving demand for digital, The Gamut will be turning off its analog 
signal and will no longer be accessible through regular AM radio beginning 
today, Monday, July 16 at


[https://images.radio-online.com/images/graphics/radionewswire.gif]

WWFD 820 AM Becomes First All-Digital AM 
Station
news.radio-online.com
In Washington DC, WWFD 820 AM The Gamut will be the first full time, 
all-digital AM radio station in the U.S. In an effort to keep up with the 
ever-evolving demand for digital, The Gamut will