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Trouble getting PBS near Berryville, VA

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Old 11-25-2018, 05:29 PM   #1  
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Default Trouble getting PBS near Berryville, VA

I recently had my roof replaced and decided to go back with a slightly different setup.

I get most but not all the channels that I want. I think I can get PBS because I did before - - - but my hardware has changed because I want to stay away from touching the roof now and because my original CM-7777 is not working like it was new.

The top antenna is an XG91 and the lower antenna is an older YAGI for VHF.

It appears that my 25 year old Channel Master 7777 is still working but not like it did when it was brand new. (It still does pulls in the VHF very well but the UHF has diminished over time)

I purchased a new but the original design Channel Master 7778 and it is on the mast right now. It is currently doing better than the 7777 for UHF but not as well as the 7777 for VHF.

I have tried numerous configurations and I'm almost home - - however not getting PBS right now - - but I did before the roof was replaced.

Both Antenna's are pointed to 112 degrees for Channels 4 - 5 - 7 and 9 in the DC market.

I think I may need a different UHF antenna pointed to the PBS station that is line of site from my location - - but I've not done this before.

Lastly, we used to get WETA 26.1 - 26.4 and 42.1 - 3 but nothing now. I see WETA is moving to Maryland sometime between now and 2020 but cannot find out exactly when.

Some PIX for clarity.
Attached Images
File Type: jpg CM-7778-Separate-Inputs.jpg (41.2 KB, 16 views)
File Type: png TV-Fool-25Nov18-NearBerryvilleVA.png (70.8 KB, 15 views)
File Type: jpg UHF-VHF-Setup.jpg (208.9 KB, 11 views)

Last edited by chapelrun; 11-25-2018 at 07:01 PM..
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Old 11-25-2018, 07:39 PM   #2  
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WVPY sold its spectrum and is now guesting on WVPT's channel 11 signal in Staunton. It's no longer anywhere near you.

You'll need to be specific about identifying "42.1-4" by using call letters. However, if it was actually operating on UHF channel 42, it may have already been kicked off that channel by T-Mobile.

WETA is supposed to move to channel 31 next summer (2019).

Last edited by projectsho89; 11-25-2018 at 09:07 PM..
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Old 11-25-2018, 08:27 PM   #3  
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Default Very good to know

Thanks for the information

I believe we had been getting - WVPY @ freq 21 until recently (Channels 42-1, 42-2 and 42-3)

Also, I would need more Amplification to get WETA until it moves and the old CM-7777 is now too weak to pick it up.

It might make the most sense for me to just wait until WETA relocates to the new Tower - since once they move they will only be about 30 miles from me. I assume about a 7 month wait or so?
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Old 11-25-2018, 09:07 PM   #4  
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"More amplification" is almost never the answer with weak stations signals (unless you have a very lossy distribution system). What you need is more antenna gain, if possible, and a more sensitive preamplifier that minimizes system noise figure.

WETA is not relocating to a new tower They're moving their signal from channel 27 to channel 31 and, per the construction permit, upping their ERP to a megawatt (from 73 kW) from the same antenna on the same tower where they've been for years.
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Old 11-26-2018, 06:41 AM   #5  
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Default Maybe Time for a combination UHF-VHF antenna

OK - - I misunderstood about WETA - - thanks for the clarification.

In my situation, I now think I should go with a combination UHF-VHF antenna which may be better for the Wash DC and Baltimore channels I mainly want to receive.

I will look locally first before I buy anything. I will report my findings.

Last edited by chapelrun; 11-26-2018 at 06:59 AM.. Reason: spelling
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Old 11-26-2018, 12:32 PM   #6  
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Try tvfool.com and run a report for your exact location, it will give you an idea on what may be needed for the best reception of the channels in your area.

You can post the report link back here to help us help you better, the report will not give away your exact location.
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Old 11-26-2018, 02:41 PM   #7  
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I could be wrong... but wasn't that included in the 1st post?
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Old 11-26-2018, 04:54 PM   #8  
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Default Rabbitears Info helpful

I checked out the Rabbitears Info site just now. When WETA goes to 1000kW and freq 31 - I should be able to get PBS again. However, I found a new (old) combo UHF-VHF antenna which I pick up on Saturday. I'm not sure but I think the new antenna might help.
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Old 11-27-2018, 11:39 AM   #9  
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Quote:
Originally Posted by InYourEyes2 View Post
I could be wrong... but wasn't that included in the 1st post?
Pictures of the report don't help much, on the real report link you can click on the stations call sign and get some more info on it.
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Old 11-27-2018, 11:42 AM   #10  
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If he did the roof and they had to move 25 year old coax then something may have gone South with that, I would have replaced the coax on the outside of the house for a start.
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Old 11-27-2018, 07:20 PM   #11  
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Default More Info

All the COAX was replaced on the roof. Including the shorter cables going to the UHF and VHF from the antenna's back to the CM-7778.

BTW, currently receive about 36 channels from DC and Baltimore - -just not PBS. Therefore, the PreAMP and Power Supply are working correctly. I did not replace the Balun on the VHF antenna but it appears to be working - however, I have seen the wrong Balun make a big difference in reception.

Still getting a new (old) combo antenna on Saturday.
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Old 12-01-2018, 01:55 PM   #12  
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Default Quest for PBS continues

In Central Virginia today picked up a Channel Master 1160A.

This thing is huge - - - about 189" long by about 108" wide.

From an old Channel Master catalog found online the following writeup. We shall see.

Innovative engineering has provided QUANTUM with high gain and an extremely narrow beamwidth that will zero in on a TV tramsmitter without picking up interference from the sides or rear. A series of patented front-end directors couples with a highly efficient rear reflector and a unique tapered drive system give QUANTUM its narrow beamwidth and an amazingly superior front directivity. QUANTUM front-to-back ratios are as high as 35dB

Raining right now - - so hopefully I can put up tomorrow.

Some PIX.
Attached Images
File Type: jpg CM-1160A-end.jpg (115.8 KB, 12 views)
File Type: jpg CM-1160A-end2.jpg (99.2 KB, 11 views)
File Type: jpg CM-0100C-powersupply.jpg (60.1 KB, 9 views)
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Old 12-01-2018, 02:32 PM   #13  
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For your location, that antenna is pretty much a waste of metal. It would better be used as recycling material for beer cans. You don't have any need for any of those low-VHF elements that take up so much of the space the antenna occupies.

Your problem channel is UHF, the 1160A has a weaker UHF section than does your 91XG so you're actually trading down in performance on your "problem" channel.

The power supply is presumed to be for an optional cartridge amplifier. If the amp is not present, do not use that power supply.

Last edited by projectsho89; 12-02-2018 at 06:39 AM..
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Old 12-01-2018, 10:06 PM   #14  
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What about WWPB for PBS



https://www.rabbitears.info/market.p...&callsign=wwpb
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File Type: jpg chapelrunHDFreportRE.jpg (225.3 KB, 30 views)

Last edited by rabbit73; 12-01-2018 at 10:09 PM..
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Old 12-02-2018, 04:55 PM   #15  
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Default Can get WWPB from here

Manually turned both the UHF and VHF antenna towards WWPB and the channels came in fine. After the test I turned back both antennas to continue to get DC and Baltimore. Thanks rabbit73 as that channel did not show up on the TV Fool plot.

With the very large antenna came a very old Channel Master 9512 which the gentleman said still worked. I have not used a rotor before but this seems now to be the most logical way to get PBS until WETA bump power back up from 73kW to 1000kW.

BTW, did not have time today to test out the CM-1160A. However, I plan to try some ground testing in several directions before trying to take that beast up a ladder.
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