1390 WPLM MA

[Mark Connelly]

 Reference: https://zipsignal.v-soft.com/ (for zip code 02660)

3.95 mV/m (day), 3.73 mV/m (night) for 1390 WPLM clearly is out of touch with current reality.

I measure 1390 WPLM at 13-15 dB weaker than 1360 WLYN. 

V-Soft gives WLYN 1.26 mV/m.

Doing the math 20*log(3.95/1.26), WPLM should be nearly 10 dB STRONGER than WLYN.

So the observed difference equates to about 23 dB less signal than expected from WPLM.

If the 3.95 mV/m value is based on 5 kW then the current power would be in the sub 100 watt range. It seems nonsensical for 1390 to be on at that power since the FM on 99.1, always with the same programming, is a full power station, not a peashooter translator. There is absolutely nowhere the AM goes that the FM does not cover much better.

Mark Connelly, WA1ION | South Yarmouth, MA | FN41vq

Receiver: Elad FDM-S2 SDR
 
-----Original Message-----
From: Allan Dunn, K1UCY <always_faithful@comcast.net>
To: badx@groups.io <badx@groups.io>; boston-radio-interest@bostonradio.org <boston-radio-interest@bostonradio.org>; irca@groups.io <irca@groups.io>; nrc-am@googlegroups.com <nrc-am@googlegroups.com>; capedx@groups.io <capedx@groups.io>
Sent: Sun, Feb 7, 2021 2:47 pm
Subject: Re: [badx] 1430 WKOX MA relocated transmitter site?

  The NRC Dx News shows a WPLM STA extension  for U3 2500/2500 or less, night pattern 24h. 
I have also seen in the recent past WKOX CP to move to the WROL site as you stated.  
 Get Outlook for iOS  From: badx@groups.io <badx@groups.io> on behalf of MarkWA1ION via groups.io <MarkWA1ION=aol.com@groups.io>
Sent: Sunday, February 7, 2021 2:35 PM
To: boston-radio-interest@bostonradio.org; irca@groups.io; nrc-am@googlegroups.com; badx@groups.io; capedx@groups.io
Subject: [badx] 1430 WKOX MA relocated transmitter site? Somewhere recently I read that 1430 WKOX was moving from its long time site on the Medford/Everett line to co-location with 950 WROL in Saugus, MA.

Signal strength measurements here indicate that this change may have occurred.

Daytime SDR band capture made last summer shows 1430 WKOX coming in about 3 dB weaker than nearby 1360 WLYN.

On a check today I have WKOX about 5 to 6 dB stronger than WLYN. The overall change of 8 to 9 dB could be attributed to less land to cross before reaching salt water near the tower.

Two online sources do not seem to reflect the change. Radio Locator appears to have the old site and strength contours that put me in the "fringe" area here on the mid-Cape whereas the daytime signal is much better than that.

https://radio-locator.com/cgi-bin/pat?call=WKOX&service=AM&h=D

V-Soft also is not reflecting current truth.

https://zipsignal.v-soft.com/

With zip code 02660 entered (closest post office relevant for stations of interest), I have:
1360 WLYN at 1.26 mV/m
1430 WKOX at 0.33 mV/m

That would make WKOX a good deal weaker than WLYN when, in fact, the reverse is true.

The V-Soft listing also has figures entered for 1390 WPLM reflective of 5 kW full power. The station (when even on) has been running much less, in my opinion no more than 500 watts, for several years now.

Mark Connelly, WA1ION | South Yarmouth, MA | FN41vq

Receiver: Elad FDM-S2 SDR


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