In article , "Jim" wrote:

FCCInfo.Com lists WFAN New York with a CP to change power to 35 KW day and
night (with "Mode" ND2, non-directional 2 (whatever 2
means...non-directional different patterns day and night...hello???).

Anyway...anybody know why WFAN...with a great signal, best in New York, low
frequency 660 kHz, 50 KW ND, island tower site (multi with WCBS) with
salt-water path to surrounding land...would want to drop to 35 kHz.

Reduce electric bill???

What's the story? Temporary?

I assume that 35 kW is for the backup tower, although the question remains
why 35 kW? Did the FCC limit the power because of interference caused by
high angle radiation, or could the backup tower not take full power from
both WFAN and WCBS? Also what is the "2" in ND2 all about, I can't see
any difference day and night?


Regards,

John Byrns


Surf my web pages at, http://users.rcn.com/jbyrns/

I assume that 35 kW is for the backup tower, although the question remains why
35 kW? Did the FCC limit the power because of interference caused by high
angle radiation ...


That is the consensus view ... the high-angle radiation towards co-channel
stations with the short auxiliary and 35 kW was about the same as with the tall
main, and 50 kW.

I guess under a CP case, a Class A is no longer allowed to increase its signal
towards a station of lesser class [ * ] .

Under the old rules, a Class A could not increase its signal towards a station
of the same class.

For this situation, WSAI had to install a DA which protected WWKB/1520 and
ZNS-1/1540, to about 40 kW. Before, it sent more than 50 kW towards those two
Class As.

[ * ] Look at WOR's CP DA ... it must provide substantially greater protection
to CKVM, and CKVM has been dark for some time, although it is still notified.

"John Byrns" wrote in message
...
In article , "Jim"
wrote:

FCCInfo.Com lists WFAN New York with a CP to change power to 35 KW day
and
night (with "Mode" ND2, non-directional 2 (whatever 2
means...non-directional different patterns day and night...hello???).

Anyway...anybody know why WFAN...with a great signal, best in New York,
low
frequency 660 kHz, 50 KW ND, island tower site (multi with WCBS) with
salt-water path to surrounding land...would want to drop to 35 kHz.

Reduce electric bill???

What's the story? Temporary?

I assume that 35 kW is for the backup tower, although the question remains
why 35 kW?

a pretty safe assumption would be that the management and accountants took a
look at the cost of a full power back up and said something like: "figure
out a way to do this for 30% less"

with a 50 kW AM transmitter the power draw will be about 100 kW (maybe a tad
less). if it needs to have generator power the cost would skyrocket. a new
100 kW gen (N gas powered) at this years prices costs from $43,000 to
$60,000 installed (depending on site requirements). deisel would be just a
little less.

Did the FCC limit the power because of interference caused by
high angle radiation, or could the backup tower not take full power from
both WFAN and WCBS? Also what is the "2" in ND2 all about, I can't see
any difference day and night?


Regards,

John Byrns


Surf my web pages at, http://users.rcn.com/jbyrns/

"Tim Perry" wrote in message
...
a pretty safe assumption would be that the management and accountants took
a
look at the cost of a full power back up and said something like: "figure
out a way to do this for 30% less"

This is how urban legends get started.

WFAN's 35 kw CP is for an auxiliary.

"Tim Perry" wrote
with a 50 kW AM transmitter the power draw will be about 100 kW (maybe a
tad
less).
___________

Most 50 kW AM stations in the US are using a Harris DX series transmitter,
and it is about 86% efficient -- 58 kW AC input at 50 kW carrier.

Even with 100% sine wave modulation it consumes 'only' about 87 kW from the
AC line. Power consumption during normal programming is less than that.

RF

Even with 100% sine wave modulation it consumes 'only' about 87 kW from the AC
line. Power consumption during normal programming is less than that.


Indeed ... hence the not insignificant popularity of the DX-50 or 3DX-50.

IMO, the Nautel sounds better.

"Peter H." wrote in message
...


Even with 100% sine wave modulation it consumes 'only' about 87 kW from
the AC
line. Power consumption during normal programming is less than that.


Indeed ... hence the not insignificant popularity of the DX-50 or 3DX-50.

IMO, the Nautel sounds better.

Mine too. Had the opportunity to choose a few years ago for a new AM, and
went with a Nautel 100 kw with a 30 kw aux. Defintely a better sound.

In article , "Jim"
wrote:

FCCInfo.Com lists WFAN New York with a CP to change power to 35 KW day
and
night (with "Mode" ND2, non-directional 2 (whatever 2
means...non-directional different patterns day and night...hello???).

I've noticed that the CDBS now often has separate day and night listings,
even where the parameters are the same. See the applications for WYCB and
WOL for example. They are both Class C stations.

Also what is the "2" in ND2 all about, I can't see
any difference day and night?


It is common, now, to file for ND2 or DA-2 even though the desired mode is
actually ND1 or DA-1.

That way, if one mode proofs OK, yet the other mode doesn't, there are more
options available.

In theory, one could refile for ND1 or DA-1, but that's another Form 301,
another big check to the consultant and another big check to the communications
attorney, and ... in short ... a waste of money.

In the days before dial-a-power, ND2 made some sense for the case where a
station could, say, make 1 kW work days, but just missed 1 kW nights, and it
didn't want to refile for 1 kW-D, 0.5 kW-N.

So ... 1 kW-D and no resistor, and 1 kW-N with a resistor, simulating a less
efficient radiator, was a possibility.

Today ... 1 kW-D and 0.82 kW-N might be one possible example, for a station
with 225 degree stick, which is required to radiate no more than the Class B
minimum efficiency with 1 kW at night.

I think San Diego's ex-KDB (or was it ex-KGB ... both are historic calls in
SoCal) is operated similarly to this.