• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

GRE Super Amp

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retroactiv

Member
Joined
Nov 27, 2004
Messages
349
Location
Chesterfield, IN USA
I'm thinking about buying one of these GRE Super Handheld Amps.... I'm wondering if anyone out here in scanner land has one and how well does it do, helping you reach out and hear things you weren't able to before.
 

jmp883

Member
Joined
Jan 7, 2005
Messages
590
Location
Northern NJ
Click on the link to see my listening post with my GRE base amp.

http://www.radioreference.com/forums/attachment.php?attachmentid=2486&stc=1&d=1144207933

There have been numerous posts on RR in regard to the GRE amps. Most of them have stated that you're wasting your money if you buy one. I disagree. There are circumstances where an antenna amp won't make a difference. Then again there are circumstances when it will make a difference....such as in my case.

I live in a valley in northern NJ, about 40 miles or so northwest of NYC. I have an omni-directional antenna mounted on my old TV antenna mast about 10-15 feet above the roofline of my house. Before I bought my amp I could only receive my town and the immediate towns around me. After installing the amp in my listening post I now can hear most everything in the upper 3rd of NJ, all of NYC, and 3 or 4 counties in southern NY. The antenna line comes into the amp and then is split out to all 5 scanners. There doesn't seem to be any signal loss or outside interference.

I don't know anyone with the handheld version but I'm sure under the right conditions you'll get the same results. :D
 
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ka3jjz

Wiki Admin Emeritus
Joined
Jul 22, 2002
Messages
21,993
Location
Bowie, Md.
Personally speaking, I think there's a great misunderstanding about preamps. If you are in an urban area, or your scanner is prone to hearing junk in places it's not supposed to be, a preamp is likely to make things worse not better. In fact, due to the way a FM signal is detected, you may even experience a loss of signal.
Preamps should be used in an area where signal strengths are rather low, or in bands where signals may not necessarily be very high, such as in the milair field.
A very good rule of thumb is to improve your antenna and coax situation first, before considering a preamp 73s Mike
 

hoser147

Member
Joined
Dec 17, 2005
Messages
4,439
Location
Grand Lake St. Marys Ohio
Both of the above posts are right on the money if you are thinking that it will boost signal at a handheld by just putting it between the radio and the antenna it will probably act as an attenuator and not help you at all unless you are in an area that has too much signal. It is better to spend the $$ to a better antenna and coax and then see if u need the amp....hoser147
 

k0bzv

Member
Joined
Dec 19, 2002
Messages
43
Location
Melbourne, FL
I agree with Mike on this matter. I use a preamp on my scanners when I wish to hear
normally weak signals. It is primarily used for aircraft monitoring. When I am monitoring
my local trunked systems, the amp has to be off. If I forget to shut it off, I hear all kinds
of noise and other wierdness. My thought on this is if the signal is weak/noisy, use the
amp; if it is strong (I live about three miles from my local trunk tower), shut the amp off.
I have 800 MHz yagi antennas and have to turn them away from the "correct" heading for
the local tower. For the towers further out (20-25 miles), I have to use the proper beam
headings and sometimes the amplifier. The scanners can be overloaded so I use the
minimum amount of gain (either antenna or preamp or both) the hear the signals the
clearest.
Even the little rubber duck antennas need a bit of help sometimes. Like using an 800 MHz
antenna to copy the civil air band!!
73 de Carl
 

xusmarine1979

Active Member
Joined
Mar 17, 2005
Messages
1,376
Location
Louisville, Ohio
I've had this amp. On VHF and UHF, any of those bands it worked great. Picked up some noise here and there, but overall it was awesome.

Not too good on 800MHz though.
 
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