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Forum: HDTV Technical   07-28-2014, 07:13 AM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
I choose #3...

I choose #3 (http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=3) . #2 (http://www.avsforum.com/forum/usertag.php?do=list&action=hash&hash=2) and #4...
Forum: Local HDTV Info and Reception   07-27-2014, 07:52 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I'm seeing the same video on 45 as you're seeing...

I'm seeing the same video on 45 as you're seeing on 3 except my TV requires me to set Full Screen on QVC or else it is squished.

Some of the Salinas LP stations also have "For Lease" slides on...
Forum: HDTV Technical   07-26-2014, 06:21 PM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
So I measured about .1 dB more than he modeled...

So I measured about .1 dB more than he modeled for 93 ohm cable. My measurement includes 8" of 75 ohm coax and a connector. The ideal impedance is 150 ohms but I don't think any such cable exists.
...
Forum: Local HDTV Info and Reception   07-26-2014, 03:56 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I took another listen and 45.1 also has right...

I took another listen and 45.1 also has right channel audio only. It is very low but not scratchy.

Chuck
Forum: HDTV Technical   07-26-2014, 10:42 AM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
Here's a photo of one combiner I made. It uses a...

Here's a photo of one combiner I made. It uses a 1/4 wave matching section (3.3" of 50 ohm coax). It's close to 0 dB loss.
Forum: HDTV Technical   07-26-2014, 10:14 AM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
I guess it depends on what world you come from....

I guess it depends on what world you come from. Narrowband to me is part of one ham band or one TV channel. The entire UHF TV band is broadband to me.

I don't know if that model used 93 ohm coax...
Forum: Local HDTV Info and Reception   07-26-2014, 07:19 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
Does K03HY 3.1 have the same low audio as KFTY...

Does K03HY 3.1 have the same low audio as KFTY 45.1? It's been that way for several days now.

Chuck
Forum: HDTV Technical   07-22-2014, 06:28 PM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
You would think that was the case and I thought...

You would think that was the case and I thought so too until I went to Larry's place and measured his signals on my spectrum analyzer. His signals are in the same strength range as mine and I'm 54...
Forum: HDTV Technical   07-22-2014, 05:47 PM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
I'm not a member there so I can't see the images....

I'm not a member there so I can't see the images. I'm not having any trouble with the link I posted. I'm not saying that the coax baluns are flat. I'm saying they are much lower loss than either the...
Forum: HDTV Technical   07-22-2014, 07:22 AM
Replies: 16,259
Views: 2,795,468
Posted By Calaveras
The 300 ohm coaxial balun is a broadband device....

The 300 ohm coaxial balun is a broadband device. See a modeled plot for an FM version here:

http://www.ham-radio.com/k6sti/balun.htm

Scroll down to 300 ohm Balun.


I'm using a UHF version...
Forum: HDTV Technical   07-21-2014, 08:28 AM
Replies: 28
Views: 814
Posted By Calaveras
I wouldn't be concerned at all about the signal...

I wouldn't be concerned at all about the signal strength difference reported from different devices. That is entirely dependent on how the software scales the reading. One box's 20 might be another...
Forum: HDTV Technical   07-21-2014, 08:13 AM
Replies: 22
Views: 440
Posted By Calaveras
I measured the gain and noise of the old CM7777...

I measured the gain and noise of the old CM7777 and AD Tech measured the new CM7777. The noise figure on UHF was essentially identical running 2.8 to 3.2 dB. The noise on high VHF was better on the...
Forum: Local HDTV Info and Reception   07-20-2014, 03:07 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
Thanks Larry! I just finished updating the list...

Thanks Larry! I just finished updating the list with some comments and adding KNVN. I look at the 50 MHz real time QSO page to see if it looks busy enough for something to be coming in. Sometimes...
Forum: Local HDTV Info and Reception   07-19-2014, 05:57 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
It certainly appears that there is much less...

It certainly appears that there is much less power in my direction than there was. KCSO is running about 8 dB higher S/N when I'm pointing at it. The KCSO heading is 237 degrees and K03HY is 260...
Forum: Local HDTV Info and Reception   07-19-2014, 11:17 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I checked KCSO to see how much interference K03HY...

I checked KCSO to see how much interference K03HY was giving it and it's low right now. That could just be conditions at the moment. I'll check it off and on.

Chuck
Forum: Local HDTV Info and Reception   07-19-2014, 11:15 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I didn't know you could use a TV channel for an...

I didn't know you could use a TV channel for an uplink. I'll bet KCVU is very strong on Mt. St. Helena. There's also K20JX in Sacramento. I just checked KFTY and it's having problems again. We have...
Forum: Local HDTV Info and Reception   07-18-2014, 02:02 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
KFTY has been booming here today with an SNR of...

KFTY has been booming here today with an SNR of 28 dB but the link issues are so bad that most of time there is no picture. This has been going on for some time now and I wondered why. Maybe the...
Forum: Local HDTV Info and Reception   07-18-2014, 07:52 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I had to do a rescan but sure enough, 23.1 is...

I had to do a rescan but sure enough, 23.1 is pointing at 32. Due to the mess that 23 is here, I missed that one. Does this mean KMUV isn't going to have its own transmitter and they'll just shut off...
Forum: Local HDTV Info and Reception   07-18-2014, 07:13 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
My best guess is that they're at different...

My best guess is that they're at different transmitter sites which allowed this to occur under just the right conditions.

Chuck
Forum: Local HDTV Info and Reception   07-17-2014, 07:40 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I may have seen Bakersfield on 17 before the...

I may have seen Bakersfield on 17 before the conversion but nothing on 16 or 17 for a long time now.

Unless the FCC changes its mind, analog will be history in little more than a year. I expect...
Forum: Local HDTV Info and Reception   07-17-2014, 02:59 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I don't know how all those stations are connected...

I don't know how all those stations are connected together. Isn't KFTY getting it's signal from KKPM on the Sutter Buttes? The new location would be even closer to KKPM. Maybe Keith will publish a...
Forum: Local HDTV Info and Reception   07-17-2014, 02:23 PM
Replies: 10,913
Views: 964,136
Posted By Calaveras
I've had the antennas pointed a Chico after I...

I've had the antennas pointed a Chico after I discovered that some of the stations up there go in and out on a short term basis much of the day. I'm seeing KHSL, KCVU and KNVN but the signals are all...
Forum: Local HDTV Info and Reception   07-17-2014, 11:28 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
The FCC granted the application for K03IC to...

The FCC granted the application for K03IC to operate 3W from Mt. St. Helena. This is another of Keith's One Ministries stations.

I wondered why there would be a station on RF 3 while KFTY was on...
Forum: Local HDTV Info and Reception   07-15-2014, 07:33 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
The IDs I have for KQED and KQEH are a list of...

The IDs I have for KQED and KQEH are a list of the three stations with the one you're watching at the top of the list. I don't know if this holds true for all their IDs. I don't have an ID for KQET....
Forum: Local HDTV Info and Reception   07-14-2014, 07:22 AM
Replies: 10,913
Views: 964,136
Posted By Calaveras
Thanks! Looks like nothing has changed with the...

Thanks! Looks like nothing has changed with the once per hour requirement. All the full power stations seem to identify but there are a lot of LP stations not IDing. And the ones that do are often...
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