San Francisco, CA - OTA - Page 374 - AVS Forum
Forum Jump: 
 21Likes
Reply
Thread Tools
post #11191 of 11202 Unread 09-15-2014, 07:48 AM
AVS Special Member
 
Calaveras's Avatar
 
Join Date: Jan 2007
Location: Mountain Ranch
Posts: 2,925
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 93 Post(s)
Liked: 88
Quote:
Originally Posted by SFischer1 View Post
Is this part of why you have said, if I remember correctly, that "normal reception" occurs when the air is mixed up. As our normal weather in the SF Bay Area is to have a temperature inversion, we seldom have "normal reception" and in my case perhaps better than "normal reception" most of the time.
I have the opposite situation. I'm higher than the Walnut Grove transmitters. Although there is no steadfast rule when it comes to this, taken over the long term I have better reception from transmitters located higher than I am.
Salinas, Mt. St. Helena, Mt. Daiblo and Fremont are all higher than I am and tend to have more enhanced periods than degraded periods. Sutro Tower, Mt. San Bruno and Walnut Grove are all lower than I am and tend to have more degraded periods than enhanced periods.

But there are exceptions. KACA and KBTV now on channel 27 come in nearly all the time and both have short towers on the valley floor and are over 50 miles away.

KBTV is the biggest exception to my TV Fool report. It doesn't appear in the list at all which extends down to stations with Noise Margins as low as -33 dB.

Chuck


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Calaveras is online now  
Sponsored Links
Advertisement
 
post #11192 of 11202 Unread Yesterday, 09:42 AM
Senior Member
 
TonyB1966's Avatar
 
Join Date: Sep 2009
Posts: 360
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked: 20
I'm wondering if I can get FOX KCBA 13 (35.1) better with a dedicated high VHF antenna. I'm currently using a combo RCA ANT751, which gets channel 8 well, as that was my only goal in that direction. The reception of KCBA is not watchable at the moment, but it does have its promising moments. Yes, I get FOX better up north on KTVU, but it's nice to have another. Plus, KCBA carries different games at times, this last weekend SD & Seattle, as opposed to the Raiders...

Thoughts on something like a 7-13 Yagi (Antennas Direct or other) making a difference, or maybe the C5? FWIW, my neighbor seems to be getting it fairly well with a combo Winegard HD7694P...

The situation per TV Fool:

http://www.tvfool.com/?option=com_wr...d24344cdac3547

Thanks for the input...
TonyB1966 is online now  
post #11193 of 11202 Unread Yesterday, 01:33 PM
AVS Special Member
 
Larry Kenney's Avatar
 
Join Date: Nov 2001
Location: San Francisco, CA
Posts: 2,640
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Liked: 31
Tony... For reliable reception that's good during good and poor conditions, I'd suggest an antenna with some gain. Something like the Antennacraft Y-10-7-13 that I have would work well for both channels 8 and 13, plus there's a new channel, KOTR Santa Cruz, that's supposed to be coming up on channel 11. If you wanted to receive the Salinas/Monterey UHF's as well, a combination antenna, like your friend's Winegard HD7694P or even a more powerful model, would be the wise choice.

You could do like I've done, put in an RF switch where you can select which antenna you want. You could have your Sutro/Mt. San Bruno antenna and the Salinas/Monterey antenna which you can chose with a push of a button.

Check out pictures of my antennas in the link below.

Larry
TonyB1966 likes this.

My complete SF Bay Area DTV Station Lists:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Lots of Broadcasting links and information:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Check out photos and info on my antennas:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Larry Kenney is online now  
post #11194 of 11202 Unread Yesterday, 02:01 PM
Senior Member
 
TonyB1966's Avatar
 
Join Date: Sep 2009
Posts: 360
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked: 20
Quote:
Originally Posted by Larry Kenney View Post
Tony... For reliable reception that's good during good and poor conditions, I'd suggest an antenna with some gain. Something like the Antennacraft Y-10-7-13 that I have would work well for both channels 8 and 13, plus there's a new channel, KOTR Santa Cruz, that's supposed to be coming up on channel 11. If you wanted to receive the Salinas/Monterey UHF's as well, a combination antenna, like your friend's Winegard HD7694P or even a more powerful model, would be the wise choice.

You could do like I've done, put in an RF switch where you can select which antenna you want. You could have your Sutro/Mt. San Bruno antenna and the Salinas/Monterey antenna which you can chose with a push of a button.

Check out pictures of my antennas in the link below.

Larry
Larry, thank you for the thoughtful reply, and helpful information.

I just looked again at my TV Fool report, and I don't see any UHF channels of interest southward, so just VHF, namely 8 and 13. Thanks for letting me know about 11 also. Looks interesting. They seem to carry sports too as I noticed Giants and A's games. Do you know about when KOTR will be on 11?

With respect to the Y-10-7-13, I actually have that antenna in my shopping cart now:

http://www.solidsignal.com/pview.asp?p=y10-7-13

Doesn't break the bank to try, so I think I'll pull-the-trigger. I don't see it locally, but I'm still looking...

I actually have a remote controlled A/B RF switch switch, somewhere (moving still). However, since I'm using a UHF and VHF combiner (Winegard CS7750), I'd just do as I'm doing now, have each down lead (DB4e & Y10-7-13) go into that...

Back to looking for a Y10-7-13 locally.

Larry, thank you again.
TonyB1966 is online now  
post #11195 of 11202 Unread Yesterday, 03:54 PM
AVS Special Member
 
Calaveras's Avatar
 
Join Date: Jan 2007
Location: Mountain Ranch
Posts: 2,925
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 93 Post(s)
Liked: 88
Quote:
Originally Posted by TonyB1966 View Post
Thanks for letting me know about 11 also. Looks interesting. They seem to carry sports too as I noticed Giants and A's games. Do you know about when KOTR will be on 11?

KOTR has had a Construction Permit for 11 for 3 years and they have not built it. I'm beginning to wonder if it will ever be built. KOTR analog 2 is off the air and has been for some time and they never filed an STA with the FCC for silent operation. The proposed transmitter site for KOTR 11 is due west of you, not south where analog 2 used to be.

Chuck


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Calaveras is online now  
post #11196 of 11202 Unread Yesterday, 04:50 PM
Senior Member
 
TonyB1966's Avatar
 
Join Date: Sep 2009
Posts: 360
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked: 20
Chuck, thank you. Clearly, one should not hold his breath on a KOTR channel 11 transmission... And, if due west of me as you say, that would be brutal to get anyways.

Solid Signal is open late and do indeed have the Y10-7-13 in stock. They can 2 day ship it for 5 bucks more, so I'd have it by the weekend, so long as I place the order by tonight. If there are any other equally competent or desirable high VHF antennas, I'm all ears.

I see that it's 300 Ohms. I have a bag of transformers, so no problem there. Do folks still use twin lead? I guess so. Are there any advantages or disadvantages of a 300 ohm antenna, when one is using RG6? I imagine there is some form of loss with the transformer. Just trying to understand why the antenna, and others, come with a 300 Ohm out...

Thanks in advance for the education!
TonyB1966 is online now  
post #11197 of 11202 Unread Yesterday, 04:58 PM
AVS Special Member
 
ProjectSHO89's Avatar
 
Join Date: Feb 2009
Posts: 2,622
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
Liked: 69
Quote:
Just trying to understand why the antenna, and others, come with a 300 Ohm out...
It's an old design that Antennacraft has never updated plus, they get you to buy a transformer while you're at the store of the company that owns them, Radio Shack.

Just use the matching transformer, its expected and normal. Channel Master and Winegard transformers are both good enough
ProjectSHO89 is offline  
post #11198 of 11202 Unread Yesterday, 05:32 PM
Senior Member
 
TonyB1966's Avatar
 
Join Date: Sep 2009
Posts: 360
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked: 20
Thank you ProjectSHO89. I've been using a transformer on the RCA ANT751. The bag of transformers I have is probably almost 20 years old though. They were always in my "cable toolbox", in doors, thankfully...

Just took-out the transformers and I think it's a Hollands: MATV TVC HMT-1.

UHF-VHF-FM 5-890 MHz

Doesn't look to be outdoor rated...

EDIT / ADD: Back to the Y10-7-13... This would seem to be a fairly directional antenna. Any idea as to the beam width? I don't see any such reference... I might even try pointing this guy northward, just like the DB4E, to see how reception is on KNTV 12 and KGO 7. These would seem to be easy gets, however they are separated a bit (309 & 312 degrees, true). I'm guessing the Y10-7-13 can nab both reliably...

Will the Y10-7-13 have any backside reception? Heck, if so, I might still get channel 8 down south, but I doubt 13 (KCBA)...

Last edited by TonyB1966; Yesterday at 11:10 PM.
TonyB1966 is online now  
post #11199 of 11202 Unread Today, 09:16 AM
AVS Special Member
 
Calaveras's Avatar
 
Join Date: Jan 2007
Location: Mountain Ranch
Posts: 2,925
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 93 Post(s)
Liked: 88
Quote:
Originally Posted by TonyB1966 View Post
EDIT / ADD: Back to the Y10-7-13... This would seem to be a fairly directional antenna. Any idea as to the beam width? I don't see any such reference... I might even try pointing this guy northward, just like the DB4E, to see how reception is on KNTV 12 and KGO 7. These would seem to be easy gets, however they are separated a bit (309 & 312 degrees, true). I'm guessing the Y10-7-13 can nab both reliably...

Will the Y10-7-13 have any backside reception? Heck, if so, I might still get channel 8 down south, but I doubt 13 (KCBA)...
The Y10-7-13 will be similar to this:

http://www.hdtvprimer.com/ANTENNAS/w1713.html

The beamwidth is on the order of 40 degrees. Reception off the back is problematic. There tends to be a lot of multipath because you may be pointed at reflections.

You can build my VHF antenna. It's better than anything you can buy. Click on my signature link.

Chuck


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Calaveras is online now  
post #11200 of 11202 Unread Today, 10:48 AM
Senior Member
 
TonyB1966's Avatar
 
Join Date: Sep 2009
Posts: 360
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 143 Post(s)
Liked: 20
Chuck, very neat info on your VHF build. Looks like a fun project and one where I can get many of the materials at The Home Depot. I have a drill press, but it's still at our "old" house, and not moved yet... Sounds like something my 5 year old daughter would enjoy doing with me too. Thanks for steering me to your sig...

Pleasantly surprised that the beam on the Y10-7-13 is not tighter. If the antenna gets ABC 7 and NBC 12 up north (probably with no amplification), and NBC & ABC 8 and FOX 13 south of me, I'll need to decide for now which is of more value, and point accordingly.

The only CBS option is via UHF 29, and PBS is also only on UHF (30, 50 & 43). And, according to TV Fool, my best option for FOX is UHF 44. At 62+ miles away and "2 edge", these are not always solid for us with the DB4e and CM777 preamp. So, if we could get a more stable FOX on KCBA, that would be great...

Looking forward to getting the Y10-7-13 this Friday.
TonyB1966 is online now  
post #11201 of 11202 Unread Today, 01:35 PM
AVS Special Member
 
Larry Kenney's Avatar
 
Join Date: Nov 2001
Location: San Francisco, CA
Posts: 2,640
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 62 Post(s)
Liked: 31
Tony... The Y10-7-13 has virtually no reception off the back. With mine pointed at Walnut Grove (55 degrees) I don't get reliable reception from either the Sutro (267 degrees) or Mt. San Bruno (190 degrees) stations off the back of it, and they're within 5 miles of my home. KGO 7 pixelates a lot and I don't get a strong enough signal from KNTV 12 to even make a picture.

I can almost guarantee that pointing the antenna northwest will work great for you for 7 and 12, but you can forget about 8 and 13. If you point it south, you'll get 8 and 13, but nothing from 7 and 12.

Larry

My complete SF Bay Area DTV Station Lists:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Lots of Broadcasting links and information:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Check out photos and info on my antennas:
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
.
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Larry Kenney is online now  
post #11202 of 11202 Unread Today, 02:00 PM
AVS Special Member
 
Calaveras's Avatar
 
Join Date: Jan 2007
Location: Mountain Ranch
Posts: 2,925
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 93 Post(s)
Liked: 88
K07ZK RF 7 near Monterey filed a License to Cover today so they may be on the air. The transmitter site is low level with limited coverage so it'll take someone in that area to tell us if it's on the air.

Chuck


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Calaveras is online now  
Reply Local HDTV Info and Reception

User Tag List



Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off