"NX211" wrote:
Been listening to KDKA AM radio in digital. What a crappy signal. It
switches back and forth from digital to analog and during the
transition the receiver makes this screech noise that sounds lik/ the
receiver isn’t resolving the digital signal correctly. When in full
digital the high frequencies are so dirty sounding, I guess due to the
slow bit rate, that I have to ask myself, what’s the point? When it
goes back to analog the signal cleans up and sounds great. Tell me
again why would anyone want this?

Are you sure that your problem isn't related to the signal bouncing between
the Pittsburgh Macaroni Co. and Wholey's in the Strip then off the Roberto
Clemente Bridge and then ricochetting around Sliberty and the Sou-side and
finally ending up somewhere in Wilmerding?

-N.Morrow (former resident of the 'Burgh and big Rege Cordic fan)

Bob Dobbs wrote:
N.Morrow wrote:
wrote:
Been listening to KDKA AM radio in digital. What a crappy signal. It
switches back and forth from digital to analog and during the
transition the receiver makes this screech noise that sounds lik/ the
receiver isn’t resolving the digital signal correctly. When in full
digital the high frequencies are so dirty sounding, I guess due to the
slow bit rate, that I have to ask myself, what’s the point? When it
goes back to analog the signal cleans up and sounds great. Tell me
again why would anyone want this?

Are you sure that your problem isn't related to the signal bouncing between
the Pittsburgh Macaroni Co. and Wholey's in the Strip then off the Roberto
Clemente Bridge and then ricochetting around Sliberty and the Sou-side and
finally ending up somewhere in Wilmerding?

-N.Morrow (former resident of the 'Burgh and big Rege Cordic fan)


So if he's experiencing multipath distortion
then maybe his radio isn't at fault after all?
I get QSB type path deterioration (not multipath) on the KFI 640 signal from
L.A. such that I periodically lose HD sync, but there's no "screeching"
artifact, just the presence or absence of hiss.

The sky wave and the ground wave are at odds with each other. I listen
via the web.

Bob Dobbs wrote:
dave wrote:
Bob Dobbs wrote:
N.Morrow wrote:
wrote:
Been listening to KDKA AM radio in digital. What a crappy signal. It
switches back and forth from digital to analog and during the
transition the receiver makes this screech noise that sounds lik/ the
receiver isn’t resolving the digital signal correctly. When in full
digital the high frequencies are so dirty sounding, I guess due to the
slow bit rate, that I have to ask myself, what’s the point? When it
goes back to analog the signal cleans up and sounds great. Tell me
again why would anyone want this?

Are you sure that your problem isn't related to the signal bouncing between
the Pittsburgh Macaroni Co. and Wholey's in the Strip then off the Roberto
Clemente Bridge and then ricochetting around Sliberty and the Sou-side and
finally ending up somewhere in Wilmerding?

-N.Morrow (former resident of the 'Burgh and big Rege Cordic fan)


So if he's experiencing multipath distortion
then maybe his radio isn't at fault after all?
I get QSB type path deterioration (not multipath) on the KFI 640 signal from
L.A. such that I periodically lose HD sync, but there's no "screeching"
artifact, just the presence or absence of hiss.

The sky wave and the ground wave are at odds with each other. I listen
via the web.

I get the same phenomena with KNX 1070.
Would like to try KGO 810 but they kill their IBOC at night
before the band opens up that far away.
If you have an HD receiver maybe you could test your reception
of our KOGO 600 up there on your end, It runs IBOC 24/7.

I have a local on 610.

On Mar 1, 2:12*pm, Bob Dobbs wrote:
dave wrote:

If you have an HD receiver maybe you could test your reception
of our KOGO 600 up there on your end, It runs IBOC 24/7.

I have a local on 610.

Is it one of those fat HD stations,
or don't you have enough selectivity
to resolve something ten kcs away?

With KOGO running its IBOC 24/7,
I'd never be able to hear it.

--

Operator Bob
Echo Charlie 42

I have 50 kW KGO 810 about 5 miles away, grounded in the same SF Bay
mud as my own ground.

It almost pins my S-meter at minimum 40-over even attenuated, and it
takes a massive effort to hear anything 10 kHz away from it; my
MFJ-1026 works totally overtime to crush the signal even when I use
USB/LSB on narrow and passband. Even worse is another 50 kW blowtorch
just 1.5 miles away on 1100 - yecch! Not only that, but its harmonics
are potent on 2200 and 3300 (farewell, R. Cultural, Guatemala). I
wonder if the 1026 can wipe that 3300 harmonic...

Bruce

bpnjensen wrote:
On Mar 1, 2:12 pm, Bob wrote:
dave wrote:

If you have an HD receiver maybe you could test your reception
of our KOGO 600 up there on your end, It runs IBOC 24/7.

I have a local on 610.

Is it one of those fat HD stations,
or don't you have enough selectivity
to resolve something ten kcs away?

With KOGO running its IBOC 24/7,
I'd never be able to hear it.

--

Operator Bob
Echo Charlie 42

I have 50 kW KGO 810 about 5 miles away, grounded in the same SF Bay
mud as my own ground.

It almost pins my S-meter at minimum 40-over even attenuated, and it
takes a massive effort to hear anything 10 kHz away from it; my
MFJ-1026 works totally overtime to crush the signal even when I use
USB/LSB on narrow and passband. Even worse is another 50 kW blowtorch
just 1.5 miles away on 1100 - yecch! Not only that, but its harmonics
are potent on 2200 and 3300 (farewell, R. Cultural, Guatemala). I
wonder if the 1026 can wipe that 3300 harmonic...

Bruce

East Palo Alto? Fremont? KGO looks cool on Google.

On Mar 2, 5:46*am, dave wrote:
bpnjensen wrote:
On Mar 1, 2:12 pm, Bob *wrote:
dave wrote:

If you have an HD receiver maybe you could test your reception
of our KOGO 600 up there on your end, It runs IBOC 24/7.

I have a local on 610.

Is it one of those fat HD stations,
or don't you have enough selectivity
to resolve something ten kcs away?

With KOGO running its IBOC 24/7,
I'd never be able to hear it.

--

Operator Bob
Echo Charlie 42

I have 50 kW KGO 810 about 5 miles away, grounded in the same SF Bay
mud as my own ground.

It almost pins my S-meter at minimum 40-over even attenuated, and it
takes a massive effort to hear anything 10 kHz away from it; my
MFJ-1026 works totally overtime to crush the signal even when I use
USB/LSB on narrow and passband. *Even worse is another 50 kW blowtorch
just 1.5 miles away on 1100 - yecch! *Not only that, but its harmonics
are potent on 2200 and 3300 (farewell, R. Cultural, Guatemala). *I
wonder if the 1026 can wipe that 3300 harmonic...

Bruce

East Palo Alto? *Fremont? *KGO looks cool on Google.- Hide quoted text -

- Show quoted text -

KGO is in Fremont immediately adjacent to Coyote Hills Regional Park
and SF Bay NWR. The east side of the bay.

Tonight, if I think about it, I will see if I can pick up KDKA.I used to
tune in sometimes, I was picking it up pretty good, with not too much
fading out and in.
cuhulin

http://www.devilfinder.com
Radio Station KDKA

KDKA - Celebrating the Worlds First Radio Station KDKA Radio.
cuhulin

"Bob Dobbs" wrote in message
news:4b8d999f.3096390@chupacabra...
bpnjensen wrote:

KGO is in Fremont immediately adjacent to Coyote Hills Regional Park
and SF Bay NWR. The east side of the bay.

When approaching SFO from the south,
isn't that KGO's stick that looks alone on an island or some kind of
sandbar?

--

Operator Bob
Echo Charlie 42

Three tower array. 37d31m33.94s N, 122d06m05.36s W.

Google Earth is your friend.

On Mar 1, 6:04*pm, Bob Dobbs wrote:
bpnjensen wrote:

I have 50 kW KGO 810 about 5 miles away, grounded in the same SF Bay
mud as my own ground.

It almost pins my S-meter at minimum 40-over even attenuated, and it
takes a massive effort to hear anything 10 kHz away from it;

During the day when KGO runs IBOC you've got those twelve and a half kc
sidebands to plug your reception on either side (800/820).

my
MFJ-1026 works totally overtime to crush the signal even when I use
USB/LSB on narrow and passband.

If your canceler is having trouble trying to null something,
about the only recourse is to reorient your sense antenna.

Even worse is another 50 kW blowtorch
just 1.5 miles away on 1100 - yecch! *Not only that, but its harmonics
are potent on 2200 and 3300 (farewell, R. Cultural, Guatemala). *I
wonder if the 1026 can wipe that 3300 harmonic...

That's another whole different issue;
is it the station that is radiating harmonics,
or some inadequacy in your receiver?

--

Operator Bob
Echo Charlie 42

To answer both your and Brenda's questions - I have an Alpha-Delta DX
UItra Multiband dipole and a 50-foot inverted L up about 20 feet.

Obviously, these two antennas will not be a perfect match for all
kinds of noise or nulling a superpower radio station a mere 5 miles
away. However, they do a respectable job - I can kill a lot of noise
with the 1026, and believe me, I have a TON of it. I can make most
local AM stations nearly inaudible with this set up - but KGO and the
thing on 1100 are just too potent. I receive them powerfully with *no
antenna at all* attached. It is hard to overstate the signal of these
monsters at this location. There are two others at 1050 and 1550 that
come close, also both a stone's throw from here.

I am aware of the rectification potential of poor solder joints and
dissimilar metals. It is entirely possible that I have one or both of
these problems after having these antennas up for a decade or so. It
has always been thus, though, and even when I attach a simple wire
directly to the Hi-Z input of my R75. FWIW, only 1100 seems to have
this effect very strongly, and it is better than it used to be (I used
to get it on 4400, 5500 and occasionally 7700).

Bruce