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Messages - pinto vortando

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91
MW Loggings / Re: KCJJ1630, Iowa City.
« on: January 12, 2021, 1344 UTC »
Have noticed past couple of weeks KCJJ with very strong signal into here well past our local sunrise.
May be due to the fact that the sun is at about its lowest all year in the sky... not able to quickly
ionize the D layer and thus absorb MW signals.

Their signal finally and rather abruptly dropped out one hour after our sunrise this morning.

92
ID and Translation Requests / Re: unid 17.145
« on: January 11, 2021, 1836 UTC »
Just came across this post.

Could be USCG NMG New Orleans  WXFAX.
There was talk about phasing this out but
AFAIK they still do WXFAX. 

93
Weather / Re: Drama free weather
« on: January 11, 2021, 1810 UTC »
Mild (for January) here in Michigan as well.  Daytime highs low to mid 30s and nighttime low around 20.
Ponds around here don't have enough ice on them to safely walk on.  Wind calm to light, no snow... lots of
people out walking and riding bikes in the various parks.

94
Longwave Loggings / Re: Winter 2020 NDB Logs
« on: January 10, 2021, 2136 UTC »
274  YPM  Pikangikum ON, been hearing this one regularly with good sigs...
AFAIK it was supposed to be shut down back in March last year.

95
Equipment / Re: Why 50 ohm coax cable?
« on: January 08, 2021, 2145 UTC »
My response was directed more at the hobby world and not the commercial world.
Even so, can't recall ever seeing a SWR meter in a land-mobile or avionics repair shop.
The Bird 43 was (is) the go to instrument for checking transmitter/antenna power
output performance.  For example, if a mobile unit rated 40 watts is putting out
40 watts with, say, a couple of watts reflected... that unit is going to go out the door.
(The SWR would work out to about 1.6:1.)
Nobody is going to tinker with it for an hour or two, much less bill the customer,
trying to get the reflected power down to zero.

In the ham world, if you want to or feel the need to address the 50 ohm to 75 ohm impedance mismatch,
you can always build a 1/12 wave matching section. 
btw... there just so happens to be an article in this month's QST regarding the construction
of a 50 to 75 ohm matching transformer.

Of course, for receive only application,  all this is of less concern. 

96
Equipment / Re: Why 50 ohm coax cable?
« on: January 08, 2021, 1422 UTC »
The mismatch between 50 ohm and 75 ohm coax will create a SWR of 1.5/1.
Some hams will obsess over this in search of the perfect 1:1 match.
However, a SWR of 1.5/1 works out to a reflected power of only 4%.

See the ARRL Antenna Book Chapter 23, the section on Standing Waves,
they got a nice graph in there showing the how much power is reflected
for a given forward power and SWR.


97

"The FCC approved the County’s temporary request to broadcast on the AM station at 100 watts for the duration of the pandemic declared emergency."


Does that mean forever ?

98
Longwave Loggings / Re: DIW ?
« on: January 05, 2021, 0124 UTC »
OK, thanks.
Thought it may have gone the way of CLB.

99
Longwave Loggings / DIW ?
« on: January 04, 2021, 1116 UTC »
Anybody log  198  DIW  Dixon NC lately, say within the past 10 days or so ?
Usually a regular in here but not lately.  Propagation good to the south this morning,
329 Charleston SC and 344 Jacksonville FL both booming in but DIW not a peep.

100
Longwave Loggings / Re: 353 QG
« on: January 02, 2021, 1228 UTC »
Dittto on the RMI, makes it nice especially when tracking a NDB.

TACAN is similar to VOR.  The DME portion is available on a VORTAC.

As for LORAN, have only used APN-70 LORAN-A (dating myself here)… had to dial each of usually 3 stations individually
and using an oscilloscope-like display figure out which line you were on for each of the stations. 
Then, referring to the chart find your lines from amongst
the series of hyperbolic lines and locate where (hopefully) they all intersected. 
Quite a process and, of course, the airplane was moving the whole time.

Now that 305 MB is off the air, hearing LT becomes a possibility. 
Have heard a carrier on 305 a couple times and a dit or dah or two
but it remains elusive.

Hopefully you find a plane someday.  It will be interesting to watch the look of disbelief
in the avionics shop when you request the ADF/RMI installation.   ;)

101
MW Loggings / Re: KDAL 610 khz Duluth MN
« on: January 02, 2021, 1127 UTC »
MN is a tough catch here for some reason.
Would be nice to log KDAL but WTVN Columbus OH has a big
signal in here.  They go directional at night aimed my way.   :(
Can hear a couple stations underneath in the null/fades but
neither sounds like the Duluth station.

102
Longwave Loggings / Re: 353 QG
« on: January 01, 2021, 1755 UTC »
Have logged 400 PPI back in 2017.  AA is a regular visitor here, heard it yesterday morning... the Buddy Holly destination airport IIRC.
Sounds like you know how to fly a NDB approach, pretty much a lost art today.

There were at least 3 beacons at Detroit Metro (DTW) back when.  367 DW and 388 DT have been gone for a while, 223 JZJ (formerly DM)
went silent a couple years ago.

Once upon a time, you would often see a dual ADF installation in a Canadian plane (180 or Beaver or such) but not so much anymore.

We had dual ARN-6 ADF on our planes in the Navy (long ago) but TACAN was the favorite for navigation.  The bird dogs were good for listening to the ball game.  :)

Off the top of my head some MI beacons now SK:
212  JX    Jackson
230  VQ   Detroit
243  OZW  Howell
269  FN   Flint
338  DE   Detroit

FN was my favorite for a quick ramp check.  If the ADF could point Flint from Pontiac (PTK) on the ground (about 25 mi) it was good to go.   ;)


103
Longwave Loggings / Re: 353 QG
« on: January 01, 2021, 0238 UTC »
skeezix,

Thanks for the info.
QG is an old timer, my first NDB logged over 50 yrs ago.
Anyway, with QG and 7B silent, have been able to log some
DX on their frequencies.
A lot of beacons have gone dark here in MI as well,
but now many Canadians are also going off the air forever.

104
MW Loggings / Re: KCJJ1630, Iowa City.
« on: December 30, 2020, 2250 UTC »
They are the strongest Iowa station into WNY, yet the lowest powered. Must have one heckova Ground system!

And they are live and local 24 hpd!

The morning DJs mentioned ThaDood in WV as well as a report from Ottawa ON Canada.

You are correct about the ground...  Iowa has very good ground conductivity.

105
Weather / Re: calm before the storm
« on: December 30, 2020, 1818 UTC »
Well, pretty much a non-event here... started snowing just before midnight but only had an inch or so on the ground
by sunrise.  The freezing rain (drizzle actually) has turned to all rain and the temp has risen to 36F, the white stuff
has mostly melted.

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