Seeking suggestions on improving reception

Status
Not open for further replies.

timkilbride

Member
Database Admin
Joined
Feb 9, 2006
Messages
1,779
Location
Iowa County, Iowa
I am looking to increase my reception to my South(see attached map). My radio, Kenwook TK-790, is in Cedar Rapids. I can receive mobiles with-in circle, the base radio at Brooklyn(40 miles) and West Liberty(35 miles) I can receive, with Brooklyn coming in better. The base radio in Iowa City is hit and miss(must shorter tower). I have used a RS 20-176, traintenna, and a homemade folded dipole. All three have basically had equal performance. All frequencies monitored are VHF-Hi(160-162MHz). I can only mount antennas in the attic. My coax run is apx. 20-28' of RG8. Any ideas?

TIA,
Tim K.
 

Attachments

N

N_Jay

Guest
There is no magic to antennas.

Get it high, get it in the open, and use reasonable cable.

You can get 3 to 9 dB more signal by going to a staked array or yagi antenna.

At 160 MHz you probably only have room for 3 db stacked.

A yagi is going to give you only one direction,

Since you only want one band, you might have luck with a preamp and a preselector, but I doubt it.

Also, 3 dB will be hardly noticeable.
6 dB will clean up some noisy signals, and you may get a few you missed but they will be noisy.
10 dB will clean up most noisy signals, but will still probably not be enough to bring in signals you are missing and make then clear.
 
Last edited:

code3cowboy

Member
Joined
Aug 22, 2006
Messages
627
Start with a good VHF base antenna tuned for the 160-161mhz railroad band. Get some low loss feed line. If you continue to have issues, you can put a preamp into your antenna system.

You can go to a long wire type antenna if you want, but it would take some crawling around the attic.
 

timkilbride

Member
Database Admin
Joined
Feb 9, 2006
Messages
1,779
Location
Iowa County, Iowa
I have a "base" antenna from diamond at my dads. Its tuned for 2M but should work well for 161.000. Now if I could only get a couple days off to get it. He lives 3.5 hours away. Today I drilled a hole through the roof and shoved a VHF 5/8 wave mobile whip through the hole and used a base NMO kit, didn't work to well :(
 
Joined
Dec 31, 2009
Messages
74
Location
Janesville, WI
I am looking to increase my reception to my South(see attached map). My radio, Kenwook TK-790, is in Cedar Rapids. I can receive mobiles with-in circle, the base radio at Brooklyn(40 miles) and West Liberty(35 miles) I can receive, with Brooklyn coming in better. The base radio in Iowa City is hit and miss(must shorter tower). I have used a RS 20-176, traintenna, and a homemade folded dipole. All three have basically had equal performance. All frequencies monitored are VHF-Hi(160-162MHz). I can only mount antennas in the attic. My coax run is apx. 20-28' of RG8. Any ideas?

TIA,
Tim K.
What is the source of this map? It looks like it has some nice info

Greg V
 

code3cowboy

Member
Joined
Aug 22, 2006
Messages
627
I have a "base" antenna from diamond at my dads. Its tuned for 2M but should work well for 161.000. Now if I could only get a couple days off to get it. He lives 3.5 hours away. Today I drilled a hole through the roof and shoved a VHF 5/8 wave mobile whip through the hole and used a base NMO kit, didn't work to well :(
you are talking a difference of 20mhz. how about trying a yagi, I happen to have one I want out of my garage.
 
N

N_Jay

Guest
I have a "base" antenna from diamond at my dads. Its tuned for 2M but should work well for 161.000. Now if I could only get a couple days off to get it. He lives 3.5 hours away. Today I drilled a hole through the roof and shoved a VHF 5/8 wave mobile whip through the hole and used a base NMO kit, didn't work to well :(
Maybe I missed something.

It sounds like you drilled a hone in the roof of your house and suck a mobile 5/8 wave antenna through with no ground plane and it did not work well?

1) I am not surprised.

2) How are you planning on fixing the hole?
 

timkilbride

Member
Database Admin
Joined
Feb 9, 2006
Messages
1,779
Location
Iowa County, Iowa
Maybe I missed something.

It sounds like you drilled a hone in the roof of your house and suck a mobile 5/8 wave antenna through with no ground plane and it did not work well?

1) I am not surprised.

2) How are you planning on fixing the hole?
It was a base NMO kit, they come with a ground plane, probably not the best ground plane, but it did have one. The hole drilled was 1/8", its already been sealed with a outdoor sealant
 
Status
Not open for further replies.
Top