2 in 1

This forum is dedicated to the discussion and support of shortwave radios and scanners.
Post Reply
User avatar
Rabbit 227
4 PILL USER
4 PILL USER
Posts: 40
Joined: Apr 20 2009, 19:52
Real Name: Johnny
Radio: Cobra 29 & 148

2 in 1

#232516

Post by Rabbit 227 »

i went to rat shack and bought the 25-1300mhz scanner antenna they have.
question is, could i run 2 scanners off of 1 antenna?
and would the antenna interfere or make my SWR's for my 102" shot up?
does it matter where on my truck i mount the antenna?
227 waving this 102" from the river in So Cal
User avatar
Circuit Breaker
Donor
Donor
Posts: 1,665
Joined: Oct 27 2006, 12:30
Handle: Circuit Breaker
Real Name: Stephen
Call Sign: K7CB
Antenna: OCF Dipole
Radio: HR2510/Yaesu FT-950
Contact:

Re: 2 in 1

#232585

Post by Circuit Breaker »

Yes, you can run it into two scanners. There would be some signal loss, but it should be okay. Any more than that and you might want to consider a pre-amp. The antenna should have little impact on your 102" whip.
Yaesu FT-950
Yaesu FT-8100
Icom IC-2820 (with D-Star capability)
Kenwood TR-751 2M all mode mobile
Kenwood TM-3530 220 MHz mobile
Uniden Washington Base
Uniden HR-2510
Icom ID-92 HT
SteppIR 40-6M Yagi
OCF 75/80M dipole
Diamond V2000A 6M/2M/70cm ground plane antenna
Antron 99
User avatar
TheCBDoctor
Sponsor
Sponsor
Posts: 2,823
Joined: Mar 13 2009, 14:54
Handle: Rick
Real Name: Rick
Antenna: Wilson 2000
Radio: HR 2510
Contact:

Re: 2 in 1

#232678

Post by TheCBDoctor »

Hi Rabbit 227

Although; not as critical as a transmitter, the receiver should "see" the proper input impedance. When the input and output of two components in a circuit have the same impedance, then there is a maximum transfer of energy. The AGC (automatic gain control) in the scanner's receiver will respond properly as long as the match is close. Any large mismatch will affect the AGC.

Again; I do not see this as critical. How many times have you seen a car with a coat hanger as an antenna? Having used a coat hanger as an antenna I can tell you that the radio did "Pick-Fence on FM much more easily. On AM the signal would cut in and out at the fringe of the station's normal range. When this happened I changed the station. :icon_e_smile:

As long as the scanner antenna is not sitting right next to the 102" whip, you will have no problem.
Respectfully as always,

Rick
User avatar
Rabbit 227
4 PILL USER
4 PILL USER
Posts: 40
Joined: Apr 20 2009, 19:52
Real Name: Johnny
Radio: Cobra 29 & 148

Re: 2 in 1

#232688

Post by Rabbit 227 »

thanks for that info,
but i think i'm just gonna stick with 1 scanner in my mobile for now.
and the 102" is in the hear of my cab and the scanner antenna is on the front driver side fender
227 waving this 102" from the river in So Cal
Post Reply