ANT751 vs ClearStream 2V in San Francisco - AVS Forum
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post #1 of 4 Old 12-13-2013, 09:34 AM - Thread Starter
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Location: Lower Pacific Heights in San Francisco (ZIP 94115) (TVFool)
Mounted on top ridge of peaked roof of 2½ story residential building, coax run 50 ft (triple shielded)
Objective: Major VHF Hi and UHF stations from Sutro Tower (2.3 mi) and Mt San Bruno (7 mi)
HDTV: Vizio M471i-A2 (used to judge reception)

Antennas Direct ClearStream 2V



Easy to assemble. High quality construction.
Solidly pulled in all green and yellow stations reported by TVFool, both VHF Hi and UHF.
If you need or want the best in this range class, this is the antenna to buy.

RCA ANT751



Relatively easy to assemble, except a bolt was missing, purchased replacement from local hardware store.
Also purchased cable zip ties to secure coax to mast and boom.
One element was loose enough to wobble freely due to poor riveting, had to insert shims to stabilize.
Pulled in all green stations reported by TVFool, both VHF Hi and UHF, but not solid on yellow.
Good value.

Summary

ClearStream 2V definitely more sensitive, clear on yellow UHF channels that break up on ANT751.
ClearStream 2V also picked up a very weak (unwatchable) VHF station not found by ANT751.
Conclusion: ClearStream 2V significantly more sensitive than ANT751, in addition to better construction quality.
However, ANT751 is sufficiently good for my purposes (yellow stations not of interest), and much less expensive ($50 vs $100).
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Hope that helps,
John
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post #2 of 4 Old 08-15-2014, 12:33 PM
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"ClearStream 2V also picked up a very weak (unwatchable) VHF station not found by ANT751."


don't know how this is possible. the high vhf gain of the ant751 is around 4-5 dbd, and is 0-1 dbd for the c2v. the c2v does have slightly higher uhf gain though.
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post #3 of 4 Old 08-15-2014, 02:38 PM
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Sure, it's possible, but it depends solely on WHAT that VHF channel might have been (not stated). The C2V is bi-directional on VHF, the ANT751V is not. The C2V will also do better on low-VHF (such as it is) than the 751.

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Originally Posted by ;
the high vhf gain of the ant751 is around 4-5 dbd,
I would expect something like that, but I've never seen either an analysis or a set of measurements that would quantify the 751's VHF performance in terms of either gain, pattern, or VSWR.
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post #4 of 4 Old 08-15-2014, 08:02 PM
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Quote:
Originally Posted by brg606 View Post
"ClearStream 2V also picked up a very weak (unwatchable) VHF station not found by ANT751."


don't know how this is possible. the high vhf gain of the ant751 is around 4-5 dbd, and is 0-1 dbd for the c2v. the c2v does have slightly higher uhf gain though.

The C2V can't be very directional on VHF so maybe the weak VHF station was in some other direction from where the ANT751 was pointed and that's why it didn't receive it.


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