airband filter

[adkad]

I recently bought an airband filter but have not noticed any apperciable difference. Any body have experiences with them in which they found they helped. I may be missing something but wonder what they really do for you. Thanks, Adkad

 

[JESSERABBIT]

I have never heard of a divice of that sort. Let me ask you this, why did you buy this air band filter? My first impression is that it may be a pass-band filter that will allow your receiver to only hear signals in the air-band. Such interference, for instance, as commercial pagers sometimes overwhelm a scanner. Pass-band filters are designed to eliminate this.
Anyone else with other ideas?

 

[morfis]

A band-pass filter seems most likely, can't think of anything else that you'd call an "airband filter" for scanner use.

AOR market such a device

(http://www.aoruk.com/abf125.htm)

 

[James]

This it ?

Something like this ?:

http://www.scannermaster.com/BPF_AIR_Air_Band_Band_Pass_Filter_p/24-531022.htm

 

[adkad]

Hi: Yeah, it is the AOR airband filter-their name- it is a band pass filter for the frequencies of 118-136-I bought it when I had not gotten a AOR5000 to see if it improved my reception on my pro-2096. Like I said, I am not sure it improved anything but wondered about other's experience with it. Adkad

 

[loumaag]

Hi: Yeah, it is the AOR airband filter-their name- it is a band pass filter for the frequencies of 118-136-I bought it when I had not gotten a AOR5000 to see if it improved my reception on my pro-2096. Like I said, I am not sure it improved anything but wondered about other's experience with it. Adkad

I don't have one and as stated before a band pass filter is used to attenuate out of band signals. It also attenuates (to some extent; in this case 4dB) the intended band. So if you are not experiencing out of band interference, adding this just makes your reception worse.

 

[gcgrotz]

If you're not bothered with strong nearby FM or paging on 152MHz you probably wouldn't notice any difference. It won't improve on any weak signals or anything but you could use it ahead of a preamp to keep it from overloading. Listen to a weak signal on 155-160 like weather or something and put the filter in line and the signal should go away.

 

[adkad]

Thanks all-helped me understand better the purpose for the filter and its prop and cons. I really don't need it fortunately. Adkad

 

[Declared_Hostile]

One of the uses air band filters were/are popular for were for blocking airband signals from the older Uniden scanners like the BC-210series or 800 series. They were dual conversion and good strong airband signals tended to show up as images right in the 150 MHz public safety ranges. If you added a outside antenna with some gain the problem really got terrible. That was my experience anyway and I was told much the same from other users.

Those old radios make some really hot airband radios by the way.