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Old 2011-11-04, 09:51 PM   #316
peano
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Quote:
Originally Posted by ADTech View Post
Well, I had a few minutes and I just couldn't resist....
Nice! I think I just found my next experiment.
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Old 2011-11-05, 06:21 PM   #317
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Awsome ADTech ! Will be interesting to see how that performs
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Last edited by Jase88; 2011-11-05 at 07:32 PM. Reason: Removed image quote
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Old 2011-11-06, 12:32 PM   #318
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Milehigh,

Welcome to the forum. More people will be able to give you better advice if you post in the Montreal thread here:

http://www.digitalhome.ca/forum/showthread.php?t=127724

Good luck!
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Old 2011-11-08, 10:53 AM   #319
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edtrutone,

Have you compared this to a previous antenna? What gains have you seen?

Mine is going up this weekend in Brantford. New install.
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Old 2011-11-08, 12:33 PM   #320
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Default new db4e antenna

the new one is much better it starts 12dbi to 14.25 all the way.
you will be happy with it,plus a bonus wb .no problem for ch 11 chch in
Mississauga.
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Old 2011-11-08, 01:59 PM   #321
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Unless he has a meter that reads signal power, it's not likely he's going to be able to provide numerical quantities for the difference in the gain of the new vs the old antenna.

Glad to hear it's working out. Consider the channel 11 reception a bonus since we didn't design the DB2/4e for anything other than UHF.
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Old 2011-11-09, 02:39 AM   #322
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For vertical stacking, what's the distance between the top and bottom antennas (measurements center-to-center, or from the bottom of the top to the top of the bottom antenna)?
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Old 2011-11-10, 01:38 PM   #323
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Default Unboxed DB4e

Unboxed my DB4e. Nice looking antenna.

One thing I noticed was one of the lower elements is a bit loose on the rivet. No way to adjust as-is. Question for ADTech: I was thinking I could shim it (between washer and rivet head) tighter with a piece of metal like a c-clip and dab a bit of silicone so it doesnt shake loose, or wrap telephone copper bare wire around between washer and rivet head to tighten. Thoughts?

Tested antenna indoors near a window. Got the usual channels I get with the terk amplified and 4221HD clone, TVO, and CHCH. Installing the CM7777 pre-amp got me CBLT-DT 5.1 (54 miles away) surprisingly. 30% quality 100% signal on a zinwell convertor.

Impressed so far. Saturday is install day. 36ft on tower and hope we can pull in TO and Buffalo stations.
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Old 2011-11-10, 03:28 PM   #324
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Chris, what is impressing you? Just getting that 1 channel, CBLT?
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Old 2011-11-10, 03:31 PM   #325
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Well yes. Impressed that I can pull in cbc from indoors at 54miles away from broadcast station.
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Old 2011-11-10, 04:23 PM   #326
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Chris,

The elements all have a "little" movement in them. However, if the movement is excessive in your opinion, i.e. if you just shake the whole unit and the wire moves, your idea of using some thin wire to shim it sounds reasonable to me. I do know that some pre-production units exhibited this concern and the factory was supposed to adjust the riveting mechanism to tighten them.

I checked the several production units I have here at the office and they all seem snug enough. Perhaps it was a one off occurrence.... We'll keep an eye out for it.
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Old 2011-11-10, 04:48 PM   #327
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The rest are snug. Not a big deal. Thanks for the response!
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Old 2011-11-21, 04:49 PM   #328
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Question VHF-Hi on DB4e?

Hello folks and AD Tech,

I know the DB4e is technically a UHF antenna but what's the performance on VHF high? I'm only asking because of the following comment on the AD website:

Most of our UHF Antennas will pick up high VHF stations like channels 7-13 depending on your distance from the transmitters and a few other variables.

However the Clearstream 2 UHF antenna needed a special kit from what I could see to get VHF-Hi ... is the DB4e the same deal or is it more "VHF-Hi friendly" right off the bat?

Any specs for VHF-Hi?
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Old 2011-11-21, 05:15 PM   #329
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On VHF, the new bowties aren't much different as the old bowties.

If you NEED VHF, plan accordingly unless you want to experiment. (Is that plain enough?)

They were designed from the beginning to be optimized for UHF 14-51, nothing else. The VHF dipole shown earlier is one option for modest high-VHF reception. At this point in time, you'd have to roll-your-own north of the border.
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Old 2011-11-22, 12:20 PM   #330
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Thumbs up

Just an update on my loose db4e element. I squeezed a bit on the rivet with a pair of large adjustable pliers and that tightened it up without any compromise to plastic or antenna structure. Note, be gentle and easy with it.

Chris
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