GRE Super Amplifier 3001
- Thread starter hfgentry
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N8DRC
Member
hfgentry said:
Hi
I have used one for little over 5 years now works great for what I use it for,have it hooked up to a discone mounted in the garage attic with 100ft. of RG-6 coax..Trunking works well..
Swipesy
Member
I have used one for a year now on my Pro 96 with the RS 800Mhz rubber duck. It makes the difference between hearing and not hearing at all 800 Mhz digital signals. I also use a Hamtronics preamp on my outside 800MHZ antenna and it too makes a large difference.
Hope this helps.
Hope this helps.
N
N_Jay
Guest
hfgentry said:
How well it works will depend on teh signal level and the noise level, trunking and P25 are not relevent.
Swipesy
Member
N_Jay said:
Then how do you explain the fact that in my case a analog 800 system and a digital 800 system only 10 miles apart horizontally from my location the analog can be hear without a preamp but the digital cannot be heard? Yet with the preamp both can be heard. Seems to contradict what you are saying. Seems to me to say that the preamp helps a weaker digital signal.
N
N_Jay
Guest
Swipesy said:
Just because two systems arethe dsame distance does NOT mean that the received signal level is the same.
You also do not know if the sensitivity of youir receiver is the same on the two sets of channels.
You also do not know if the background noise in the area is the same for both sets of channels.
The fact that one is digital and one is analog should not matter (other than your receiver may have different sensitivity for the two different types of modulation).
And yes, pre-amps help weaker signals more than stronger signals, ALL ELSE being the same!
hfgentry
Member
- Joined
- May 19, 2004
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Problem
I added one to my system tonight ... It helps rcv conv channels, but loses all 800 truncked, APCO 25, a type IIi, and a type II. I take it out of line and get the signals back?? Whats up with it??
Using BC796D and Discone ant.
The Amp is brand new from GRE.
I added one to my system tonight ... It helps rcv conv channels, but loses all 800 truncked, APCO 25, a type IIi, and a type II. I take it out of line and get the signals back?? Whats up with it??
Using BC796D and Discone ant.
The Amp is brand new from GRE.
JoeyC
Senior Member
Swipesy said:
Did you ever stop to think that maybe the 2 systems are transmitting at different power levels? When was the last time you heard the guys at the KMART 10 miles down the road on your scanner?
I have one for sale if anyone is interested. $35 shipped. It is brand new in the box, never used. Dug it out of storage after seing these threads. PM for more..
Swipesy
Member
Did you ever stop to think that maybe the 2 systems are transmitting at different power levels? When was the last time you heard the guys at the KMART 10 miles down the road on your scanner?[/quote]
Yup, sure did. That is my point exactly, the preamps work great on boosting weak signals in rural areas with low noise levels.
Life must be real dull in Nevada if all you have to listen to is K-Mart
Yup, sure did. That is my point exactly, the preamps work great on boosting weak signals in rural areas with low noise levels.
Life must be real dull in Nevada if all you have to listen to is K-Mart
NorwalkRXing
Member
scanner_freak....sent ya a pm about the GRE amp... 8)
JoeyC
Senior Member
Swipesy said:
Have never listened to them, just making a comparison because you obviously weren't getting it.
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