Havre de Grace, MD: reception issues - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 15 Old 05-23-2019, 07:14 PM - Thread Starter
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Havre de Grace, MD: reception issues

why can i get hd fm radio in the woods up here in harford county but not tv reception. tv is fine in the winter with no leaves.
rjv
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post #2 of 15 Old 05-23-2019, 08:32 PM
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post #3 of 15 Old 05-23-2019, 08:34 PM
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Leaves absorb signals on high VHF and especially UHF. They're much less problematic on low VHF where FM radio is.
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post #4 of 15 Old 05-24-2019, 02:39 AM
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You should provide your Location (Zipcode + nearest cross-streets or LAT/LONG to nearest minute) so that we can enter into below websites.

Alternatively, YOU can enter your street address into www.tvfool.com and post the results URL (web address at top of Browser) so we can see it.

Do the same at www.fmfool.com but you'll have to first Right-Click on the image and [in Firefox] select "View Background Image" before copying THAT web address into a post.

In IE, posting FMFool Results is more complicated: you can click on "Save Image" and then save that image file to your HDD...and then you'll have figure out HOW to upload THAT image file to your image storage area on this Forum...and then post the Image link into a post....or simply Download and Install Firefox to save a LOT of time!!!!

It would also help if you could list which TV Call Letters....and FM-HD stations you DO (and Do NOT) Receive that you would LIKE to. And describe your TV and FM Antenna(s), if on a Rotator(s) and how signals are distributed incl. Model Number for Preamp or DistroAmp, and how many drops. It's possible/likely that we can suggest how to improve your system.

Last edited by holl_ands; 05-24-2019 at 03:16 AM.
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post #5 of 15 Old 05-24-2019, 07:03 AM
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His previous thread:
Havre de Grace, MD: Trees and preamp question

https://www.avsforum.com/forum/45-lo...l#post56410118

previous report OK if he still lives at 2211......:
http://www.tvfool.com/?option=com_wr...90381e553d941e

ran it again
http://www.tvfool.com/?option=com_wr...9038f027fd0fdb

This is a report from rabbitears.info that should be a little more accurate:



Quote:
Originally Posted by holl_ands View Post
It would also help if you could list which TV Call Letters....and FM-HD stations you DO (and Do NOT) Receive that you would LIKE to. And describe your TV and FM Antenna(s), if on a Rotator(s) and how signals are distributed incl. Model Number for Preamp or DistroAmp, and how many drops. It's possible/likely that we can suggest how to improve your system.
He might not do that: I don't think he even came back to give us a report after adding a preamp.


FM Report:
http://www.fmfool.com/modeling/tmp/f...a/Radar-FM.png
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Last edited by rabbit73; 05-24-2019 at 12:06 PM.
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post #6 of 15 Old 05-24-2019, 11:59 AM
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Well, RabbitEars Report certainly explains why his TV Reception is so poor [but WHY is it much worse than TVFool Report???] Hence should be using a [UHF-Only] 8-Bay Bowtie of his choice [e.g. CM4228] plus EITHER of the fol. Hi-VHF Yagis....and a VHF/UHF Combiner from Antennas-Direct with a Preamp:
https://www.amazon.com/30-2475-Fring.../dp/B014M0XXES [9-Element Hi-VHF]
https://www.amazon.com/30-2476-Fring.../dp/B07R69QJ3Q [12-Element Hi-VHF]
https://www.amazon.com/Antennas-Dire.../dp/B008PBTPN4

OTOH: Below. is FMFool Report for his street address....the very plentiful "Green Zone" stations "should" be receivable with a TRUE OMNI FM Antenna (such as Stellar Labs Double Hoop), since they are coming from many different directions (most of us are "surrounded" by FM stations). And "Yellow Zone" stations would likely require a Medium Gain FM Antenna on a ROTATOR to receive. For convenience, I would use an RF A/B Switch to select either TRUE-OMNI or Rotating FM Antenna:
https://www.amazon.com/Stellar-Labs-.../dp/B00DHHOZBI [TRUE-OMNI Double Hoop Antenna]
https://www.amazon.com/OUTDOOR-ANTEN.../dp/B00NRHAV2K [4-El Medium Gain FM Antenna]
https://www.amazon.com/Radio-Shack-R.../dp/B000H50L9S [R-S A/B Switch with Remote Control]
https://www.ebay.com/p/RadioShack-21...tch/1000132531 [Ditto]

FM signals should preferably be distributed via a separate Coax and NOT going through a Preamp or DistroAmp, as I discussed in fol. post...this is esp. true for your location, with EXTREMELY strong [and VERY Strong] FM Stations very close to you, which could readily overload a shared TV/FM Preamp/DistroAmp, blocking reception of some weak FM Stations as well as possibly some Hi-VHF Stations:
https://www.avsforum.com/forum/154-h...l#post58025938


Last edited by holl_ands; 05-24-2019 at 12:45 PM.
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post #7 of 15 Old 05-24-2019, 12:15 PM
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Quote:
Originally Posted by holl_ands View Post
Well, that certainly explains why his TV Reception is so poor....

OTOH: Below. is FMFool Report for his Zipcode (which would be more accurate if he entered his own street address)....
The reports that I gave above DO use his exact address. He gave it in a previous thread.

Quote:
Originally Posted by rviele View Post
mike- since i don't know to do a tv fool. my physical address is 2211 sherwood lane havre de grace,md 21078. i live out in the country about 5 miles fromthe town of aberdeen. description of the house is a single story rancher in the woods. antenna is a channelmaster with two bent elements. i believe it is a 4428. funny thing is i get every channel i want except for chan 13 yet they are all on the same heading.

If you can not measure it, you can not improve it.
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Last edited by rabbit73; 05-24-2019 at 12:18 PM.
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post #8 of 15 Old 05-24-2019, 12:41 PM
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I updated rviele's FMFool Report in my earlier post, using his actual street address. Number of "Green Zone" stations is less, but still plentiful...and in many different directions....number of "Yellow Zone" stations is also less with LOTS in "Red Zone", which may or may NOT be receivable with Medium-Gain FM Antenna.
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post #9 of 15 Old 05-24-2019, 07:01 PM
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Trees may be blocking reception in fringe area. Major DC and Baltimore stations are High VHF and UHF. Also may be on fringe for Philly as well, but I would focus primarily on DC and Baltimore.
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post #10 of 15 Old 05-25-2019, 09:35 AM - Thread Starter
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Quote:
Originally Posted by rabbit73 View Post
His previous thread:
Havre de Grace, MD: Trees and preamp question

https://www.avsforum.com/forum/45-lo...l#post56410118

previous report OK if he still lives at 2211......:
http://www.tvfool.com/?option=com_wr...90381e553d941e

ran it again
http://www.tvfool.com/?option=com_wr...9038f027fd0fdb

This is a report from rabbitears.info that should be a little more accurate:



He might not do that: I don't think he even came back to give us a report after adding a preamp.


FM Report:
http://www.fmfool.com/modeling/tmp/f...a/Radar-FM.png
FYI- i added a antenna direct "juice" and a radio shack distrabution amp also.
rjv
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post #11 of 15 Old 05-25-2019, 05:59 PM
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Quote:
Originally Posted by rviele View Post
FYI- i added a antenna direct "juice" and a radio shack distrabution amp also.
rjv
Good; did they improve your reception?

If you can not measure it, you can not improve it.
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post #12 of 15 Old 05-25-2019, 06:40 PM
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Quote:
Originally Posted by tylerSC View Post
Trees may be blocking reception in fringe area.
Lots of tall trees at rviele's location.

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post #13 of 15 Old 05-25-2019, 06:54 PM - Thread Starter
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Quote:
Originally Posted by rabbit73 View Post
Lots of tall trees at rviele's location.

reception is fine in the winter. goes away in the summer. only thing i get now is the baltimore channels wbal channel 11 and wjz channel 13.
rjv
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post #14 of 15 Old 05-25-2019, 07:22 PM
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Quote:
Originally Posted by rviele View Post
reception is fine in the winter. goes away in the summer. only thing i get now is the baltimore channels wbal channel 11 and wjz channel 13.
rjv
That is to be expected. VHF signals can make it through the trees better than UHF signals.


http://www.hdtvprimer.com/ANTENNAS/siting.html
scroll down to
Trees and VHF-high

If you can not measure it, you can not improve it.
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Last edited by rabbit73; 05-25-2019 at 07:26 PM.
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post #15 of 15 Old 05-26-2019, 10:56 AM
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Quote:
Originally Posted by rviele View Post
reception is fine in the winter. goes away in the summer. only thing i get now is the baltimore channels wbal channel 11 and wjz channel 13.








At the moment I only see two possible ways to receive VHF and UHF channels all year.

1. Cutting back the trees directly in front of the antenna in the Baltimore path and raising the antenna. There are trees further out in the path, but they might not be as harmful to UHF signals.
2. Putting up a smaller antenna for UHF only on a mast so that it will be above the trees. The UHF signals from that antenna can be combined with the VHF signals from your present antenna.

Can you show us a photo of your present antenna?

There will be channel changes because of UHF Repack by the FCC.

WMAR ABC will move from 38 to 27 during Phase 9, 3/14/2020 to 5/1/2020
https://www.rabbitears.info/market.p...&callsign=WMAR

https://www.rabbitears.info/repackch...=&lss=&status=

https://www.fcc.gov/about-fcc/fcc-in...ition-schedule


WMPT PBS will move from 42 to 21
https://www.rabbitears.info/market.p...n=WMPT#station

WJZ CBS from 13 to 11
https://www.rabbitears.info/market.p...gn=WJZ#station

WBAL NBC from 11 to 12
https://www.rabbitears.info/market.p...n=WBAL#station

WPXW ION from 34 to 35
https://www.rabbitears.info/market.p...n=WPXW#station

WBFF Fox 46 to 26
https://www.rabbitears.info/market.p...n=WBFF#station
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If you can not measure it, you can not improve it.
Lord Kelvin, 1883
www.megalithia.com/elect/aerialsite/dttpoorman.html

Last edited by rabbit73; 05-28-2019 at 04:36 AM.
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