Antenna/Radio question

Status
Not open for further replies.

Wally46

Member
Joined
Oct 8, 2012
Messages
235
Location
Clinton, Iowa
I have an Anytone 2 meter/70 cm mobile radio in my shack hooked up to a discone scanner antenna. The problem is I get quite a bit of RF overload where it will stop on certain frequencies sometimes and make noises. My question is if I use an actual 2 meter/ 70 cm antenna like say a Diamond X50A will my receive clear up?
 
Joined
Dec 26, 2004
Messages
1,217
Location
Tulsa
Short answer, no. Most of us have a lot of RFI generating stuff in our homes, one of the most annoying is a router with Ethernet cabling. This will generate noise at various frequencies especially in the VHF band, one solution is to replace all your cabling with shielded CAT cabling and try to move things around to minimize the effects. Antennas by their very nature are broadband especially at higher frequencies so swapping antennas may or may not help. Good luck, I feel your pain.
 

mrweather

Member
Joined
Dec 19, 2002
Messages
913
It might help. A discone by its definition is a very broad-band antenna designed to receive a wide range of frequencies. A band-specific antenna, particularly one that has some gain, may be "deaf" enough outside of its designed range to attenuate RFI on those out-of-band frequencies.

At the very least going with something like X50A will improve your transmitted signal simply because it has more gain than a discone.
 

robertmac

Member
Premium Subscriber
Joined
Jun 6, 2005
Messages
2,156
I will make the assumption that you have ruled out the various digital modes used on 2 m and 70 cms. Cable the next big offender in my house until I changed services. Now only get interference on a hand held when close to cable source. Move 5 feet away and nothing.
 

K3DCX

Member
Joined
Aug 19, 2011
Messages
40
Location
FM19
You should see improvement.

Typically a discone antenna is very wide band. This means it will collect energy across many octaves which can impact your receivers selectivity in specific bands.

Odds are your SNR is poor and it doesn't take much to break your squelch when scanning. An antenna closer to 5/8 length of 2m should help noticeably.



Sent from my iPad using Tapatalk HD
 

Wally46

Member
Joined
Oct 8, 2012
Messages
235
Location
Clinton, Iowa
You should see improvement.

Typically a discone antenna is very wide band. This means it will collect energy across many octaves which can impact your receivers selectivity in specific bands.

Odds are your SNR is poor and it doesn't take much to break your squelch when scanning. An antenna closer to 5/8 length of 2m should help noticeably.



Sent from my iPad using Tapatalk HD
That's what my thoughts were also. Just wasn't sure. Thanks for your input guys
 

TLF82

Member
Premium Subscriber
Joined
Jul 29, 2011
Messages
356
Location
Texas
You're also dealing with a wide band receive radio. The front end of those tend to be fairly loose and will pick up interference more.
 
Status
Not open for further replies.
Top