TVA 502 28dB passive roof antenna - the all-purpose weapon against poor reception

Unfortunately, here at Amazon ratings of five verschienen Vivanco antenna types
(Design Indoor, PC Indoor, Standard indoor, outdoor and automotive standard indoor) to
Overall thrown together. This results in a total of "star" a
completely wrong overall picture!

My review refers expressly only to the TVA 502 car antenna, "passive raising
terrestrial TV signals to 28 dB ". When comparing the reviews please click the respective
specified type eighth!

* To receive situation:
Here on the south-western outskirts of Munich, the DVB-T reception was a simple
noname-rod antenna in the room virtually absent (only 8 of 26 channels have been found
and even these few reported persistent disturbances), although the stations at the Olympic Tower and only 10 kilometers
Is as the crow flies. A 10dB Indoor Antenna (by others) with 20dB active gain
Although delivered in service search all receivable stations, but they were often by blocks
disturbed. With my parents, who live even further away 5km already reaches the easiest rod antenna for
completely störugsfreien from reception.
So the reception possibilities vary greatly from place to place, and not only on the distance
determined to station, but also from sources of interference as well as absorbing and reflecting obstacles
in the neighborhood.

* To Vivanco roof antenna:
The antenna is delivered partially assembled, some items still need to be bolted together.
Those who try an antenna on the roof will be installed here have no trouble.
The mast clamp can be easily converted to vertical installation (here in Munich is vertically polarized
broadcast).
This something larger roof antenna of Vivanco our reception problem is now history.
Due to its high (passive) antenna gain of 28dB and a mounting under the roof should in many
Cases provide satisfactory results.
Due to the strong directional effect an exact alignment, however, is urgently needed. One gets by
of course robustness to surrounding interference.

* Conclusion:
You have reception problems with Zimmernatenne? You have the option on the roof or
a balcony to install a 1m long antenna? Then you are well served by the TVA 502 :-)

* Additional info (applies generally, not only for the above-described antenna):
For each antenna, the "gain" in dB is given.
Simply put, the more dB, the stronger the signal antenna
provides.

However, one must distinguish between the passive reinforcement (this is called
the "gain" of an antenna) and the gain of any built-in active
Amplifier.
In Product Descriptions Only the sum of the two values ​​is usually simply stated.
Although this is not technically wrong, but conceals the customer important detailed information.

Because an active amplifier amplifies everything in matching Freuqenzbereich, not only the
to be received Fernsesignale. Disturbances are equally also amplified
and bring the receiver of the TV just in trouble, as when the wanted signal
would be too low.

That's why a 10 dB antenna with 20dB amplifier (ie 30dB in total) in the vast majority
Applications not better but much worse than an antenna that purely passive
28dB "reinforcement" reached.

An antenna with 28dB gain (ie passively, without active amplifiers) has a strong directivity
and receives only a narrow corridor, which requires a precise alignment.
However, this has the advantage that interference signals from other directions are hidden as possible.
A disadvantage of highly directional antennas with high gain are its almost gigantic
Dimensions compared to the compact wideband (room) antennas with built-in amplifier.
On the roof, but that does not matter, the main thing the reception is good :-)