Thank you for the advice.
Now, I get all the '10' Montreal local TV stations including TVA and CTV which are on ch10 and ch12 (VHF-Hi) at 100% by using a simple DIY antenna "2 bay bowtie" placed indoor near the window.
In July, when I move, I can use an outdoor antenna (the mast is already placed). Here is my tvfool report for my new location:
To summarize, my problem won't be the local TV stations as I can receive them with a small DIY indoor antenna, but the problem is the U.S TV stations and specially ABC on ch-13 and fox on ch-43 (weak signals).
Yes, that would be a great option of using the db4e for UHF which has almost 11dbd gain average on UHF and combine it with another Hi-VHF antenna.
Another option would be to simply use a compact combo UHF-VHF yagi or panel antenna.
My original question was regarding the db4e antenna gain on VHF-hi and its capability since the antenna direct website shows only its uhf performance.
Now I understand that this antenna is designed only for uhf and strong vhf signals and not for weak vhf signals.
I discovered also that the CM-4221HD has a gain of 3.5dbi==>1.35dbd on ch-13.
According to my understanding and my calculation.
For the ABC ch-13: the NM(db)=0.9db.
Let's say that the cable, connectors.... loss would be -2db.
I would use a pre-amp with less than 0.5db noise and 10db of gain
So in that case the gain of my antenna should be > 0.5-0.9 lets say 0.
Which mean that the gain of my antenna should be superior to 0dbd ==> 2.15 dbi.
I didn't considered the cable loss as my pre-amp gain is 10db, I only considered the pre-amp noise in my calculation.
Can any one tel me if that correct? or tell me what would be the minimum gain that I would need on VHF and UHF according to my tvfool report.
Any suggestions would be appreciated!!!