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Search: Posts Made By: lifespeed
Forum: Help With Reception 19-Apr-2017, 11:57 PM
Replies: 22
Views: 11,684
Posted By lifespeed
I really like that XG91, it fixed some multipath...

I really like that XG91, it fixed some multipath dropouts on KPIX RF29 VC5.1 compared to when I had the DB4e aimed at Mt. Sutro. I would probably like to keep it.



But the DB4e points at Mt....
Forum: Help With Reception 19-Apr-2017, 11:45 PM
Replies: 22
Views: 11,684
Posted By lifespeed
Plots are much better than a single number. The...

Plots are much better than a single number. The UHF antenna would actually see a very nice load up to 600MHz (-16dB R. L.). Your UVSJ performs well, especially over the UHF band once it is cut down...
Forum: Help With Reception 19-Apr-2017, 6:59 PM
Replies: 22
Views: 11,684
Posted By lifespeed
Yes, that is how it works. The UHF antenna gain...

Yes, that is how it works. The UHF antenna gain is 12 to 14 dB, so even with a noise margin of 10 dB (KBCW RF45 VC 44.1) I still get error-free reception. So (10+12)-15 leaves about 7 to 9dB for...
Forum: Help With Reception 19-Apr-2017, 12:12 AM
Replies: 22
Views: 11,684
Posted By lifespeed
There was a tie on it, wasn't flapping. ...

There was a tie on it, wasn't flapping.



I would ask for a link, but it is academic with stuff disappearing.
Forum: Help With Reception 18-Apr-2017, 10:12 PM
Replies: 22
Views: 11,684
Posted By lifespeed
I missed the return loss specs. VHF at 18dB is...

I missed the return loss specs. VHF at 18dB is great, UHF at 12dB just OK. It is a tricky design task, especially when it is supposed to cost nothing and have zero loss.

At least you guys...
Forum: Help With Reception 18-Apr-2017, 9:35 PM
Replies: 22
Views: 11,684
Posted By lifespeed
Yes, that VHF Yagi w. reflector (?) is huge. But...

Yes, that VHF Yagi w. reflector (?) is huge. But there is plenty of room up there, nothing but birds anyway. I'm not one to get too concerned over antenna aesthetics, if it works it's beautiful.
...
Forum: Help With Reception 18-Apr-2017, 8:23 PM
Replies: 22
Views: 11,684
Posted By lifespeed
Although the Clearstream 5 is a nice antenna, I...

Although the Clearstream 5 is a nice antenna, I have little use for the broad beam and UHF gain. The Stellar Labs 30-2476 (http://www.mcmelectronics.com/product/STELLAR-LABS-30-2476-/30-2476) does...
Forum: Help With Reception 18-Apr-2017, 8:07 AM
Replies: 22
Views: 11,684
Posted By lifespeed
Adding VHF, diplexer and antenna recommends

I need to add a VHF antenna to my UHF only setup. TV fool report here (http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3ddfafd70a340041). It is kind of a long story, but if you look at the...
Forum: Help With Reception 22-Jan-2017, 12:34 AM
Replies: 11
Views: 11,623
Posted By lifespeed
bump for added photos

See install above, @GroundUrMast would be satisfied.
Forum: Help With Reception 1-Jan-2017, 4:33 AM
Replies: 11
Views: 11,623
Posted By lifespeed
Looks like the DB4E was the way to go

I mounted the DB4E antenna to the chimney today on a 10' mast, 15' of high quality RG6, no preamp, Silicondust HDHR4 network tuner. It is a couple feet above the peak of the roof, about 24' above...
Forum: Help With Reception 15-Dec-2016, 7:50 AM
Replies: 11
Views: 11,623
Posted By lifespeed
Thought about this some more and did the noise...

Thought about this some more and did the noise margin calculations for the worst-case 10dB stations. A big assumption in these calculations is 7dB noise figure for the Silicondust HDHR3 tuner, I...
Forum: Help With Reception 14-Dec-2016, 11:41 PM
Replies: 11
Views: 11,623
Posted By lifespeed
I am a half mile south of Communications Hill, a...

I am a half mile south of Communications Hill, a few blocks west would do exactly as you described.
Forum: Help With Reception 14-Dec-2016, 10:41 PM
Replies: 11
Views: 11,623
Posted By lifespeed
Do you think the dB4E is enough for RF channels...

Do you think the dB4E is enough for RF channels 42 (356 deg) and 45 (315 deg) at -80 dBm with the antenna pointed at 335 degrees? I guess the 60 degree beam angle of the less-directional dB4e might...
Forum: Help With Reception 14-Dec-2016, 8:50 PM
Replies: 11
Views: 11,623
Posted By lifespeed
antenna and low noise amp recommend for San Jose

Time to de-lurk and install some antenna hardware, here is my TVfool report (http://www.tvfool.com/?option=com_wrapper&Itemid=29&q=id%3ddfafd70a340041). I would like to do without a rotor, and start...
Showing results 1 to 14 of 14

 

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