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What About This Antenna Is Superior Enough To Justify Cost?

The technical side of broadcasting. Think IBOC is a sham? Talk about it here! How about HDTV? Post DX reports here as well.
CK-722
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What About This Antenna Is Superior Enough To Justify Cost?

Post by CK-722 » Tue Nov 03, 2020 11:50 am

I don't see any specs that are that impressive-like 8.2 dB over isotropic, not even over a tuned dipole.

https://www.solidsignal.com/pview.asp?p ... gLUHvD_BwE
Last edited by CK-722 on Tue Nov 03, 2020 6:40 pm, edited 1 time in total.


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Turkeytop
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Re: What About This Antenna Is Superior Enough To Justify Cast?

Post by Turkeytop » Tue Nov 03, 2020 11:54 am

Wouldn't be worth it to me because I rarely watch TV. But it is a pretty impressive antenna.

For anyone who does watch TV it would probably pay for itself pretty quickly if they switched fro cable or satellite.


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km1125
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Re: What About This Antenna Is Superior Enough To Justify Cast?

Post by km1125 » Tue Nov 03, 2020 12:24 pm

There's no way I could justify that kind of cost for a residential installation. Commercial, no problem. but that would be more due to the expected longevity, not necessarily the gain or other signal quality parameters.



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Turkeytop
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Re: What About This Antenna Is Superior Enough To Justify Cast?

Post by Turkeytop » Tue Nov 03, 2020 4:10 pm

What sort of commercial application would there be for that antenna?


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k8jd
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Re: What About This Antenna Is Superior Enough To Justify Cast?

Post by k8jd » Tue Nov 03, 2020 4:31 pm

Maybe use at a cable TV company head end, far from the city. Or on a hi-rise luxury condo building roof, for a building wide CATV system !
It must have solid elements (not aluminum tubing), maybe silver plated connectors, and stainless steel hardware holding it together.
Must be Built to go on a tall tower where the wind and Ice is terrible, and surviving all !
Not for suburban homes , by any means !
IMHO



CK-722
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Re: What About This Antenna Is Superior Enough To Justify Cast?

Post by CK-722 » Tue Nov 03, 2020 6:31 pm

Barely over 6.0 dBd. Not bad at Channel 2. Not very good on 7-13. Blonder Tongue mainly makes CATV and MATV equipment. I think they made more consumer oriented equipment 50 years ago, which was cheaper and in Allied Catalogs,


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

Your bullet missed my trial balloon.

RTN Price. Not guaranteed. As of 12:30, 157.71 Down 0.22.

Artificial Intelligence is a Child that needs a Parent to guide it through.

CK-722
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Joined: Sun Dec 16, 2018 3:53 pm

Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by CK-722 » Tue Nov 03, 2020 10:00 pm

Blonder Tongue had a UHF only antenna, and some preamps in the 1970 Allied Catalog. Very reasonably priced.

https://worldradiohistory.com/Archive-C ... d-1970.pdf


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

Your bullet missed my trial balloon.

RTN Price. Not guaranteed. As of 12:30, 157.71 Down 0.22.

Artificial Intelligence is a Child that needs a Parent to guide it through.

CK-722
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Joined: Sun Dec 16, 2018 3:53 pm

Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by CK-722 » Wed Nov 04, 2020 7:08 pm

This is a classic wide band log periodic, so the gain is essentially the same over a large range of frequencies. There don't appear to be design gaps in frequency coverage. Just 54-216. The FCC Field Office in Farmington Hills used to have a HUQE log peoridic like that that probably went down to 15 or 20 MHz and at least as far up as 216 MHz. It is like a three element beam at each frequency, so something in the range of 6-7 dBd across the range. AT&T used to have ones that went down to at least 7 MHz for transoceanic long distance.


Is THAT where they got the idea for the 486-SX?

Same (x, y, z), different (t)

Your bullet missed my trial balloon.

RTN Price. Not guaranteed. As of 12:30, 157.71 Down 0.22.

Artificial Intelligence is a Child that needs a Parent to guide it through.

Mike Oxlong
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Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by Mike Oxlong » Thu Nov 05, 2020 1:36 pm

I'm not sure I could bring myself to by a $800 for TV.


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Turkeytop
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Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by Turkeytop » Thu Nov 05, 2020 6:00 pm

Mike Oxlong wrote:
Thu Nov 05, 2020 1:36 pm
I'm not sure I could bring myself to by a $800 for TV.

If I was a TV guy I could. But since I rarely watch TV it would be a waste.

Now if it was for Radio - - -


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SolarMax
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Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by SolarMax » Thu Nov 05, 2020 10:53 pm

CK-722 wrote:
Wed Nov 04, 2020 7:08 pm
This is a classic wide band log periodic, so the gain is essentially the same over a large range of frequencies. ... AT&T used to have ones that went down to at least 7 MHz for transoceanic long distance.
AT&T had (don't know if it's still there) for domestic use, a H*** 6.4 MHz to 30 MHz Log Periodic on an 85' tower at the Warren Main Central office in Sterling Hts. This was (is?) the company's Emergency Operations Center. The tower, antenna and commercial HF radio gear were part of the SHARES/NSEP radio service, a "Doomsday" radio system. When all else fails, the HF radio will work. This site was a secondary site on that system, the primary being near Chicago.



k8jd
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Re: What About This Antenna Is Superior Enough To Justify Cost?

Post by k8jd » Sat Nov 07, 2020 11:47 pm

I remember seeing the LP at Farmington hills and also In Warren, there were a few other HF LP antennas I have seen in my travels around MI before I retired ! CK722 has a good understanding on how they work, it's A lot different idea than a Yagi Design !
Aside; My first transistor audio amp homebrewed , used A Raytheon CK722 transistor ! Built it when I was about 15 years old and was amazed it worked on a couple D-cells and without a 350 V B+ supply :D



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