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Call Sign : 108CT234 Posts : 19 Times Thanked : 0 Join date : 2019-10-26 QTH or Location : Kirkintilloch/ Glasgow Equipment Used : YAESU FT450D 6mtrs Age : 64
Subject: Mobile help Wed Feb 05, 2020 9:40 pm
Looking for some advice Hi members I am going to go mobile with my yaesu 450d . So looking for some help . I have connected power lines to battery. And my antenna on roof , But do I still need to run a earth wire to the earth screw at back of th 450d. Every help will be very much appreciated. Many thanks john
Alan Pilot Major contributor
Call Sign : 163-CT-220...MW7TTA Posts : 2516 Times Thanked : 69 Join date : 2019-11-19 QTH or Location : Anglesey North Wales Equipment Used : Yaesu FT-991A,,Yaesu FTDX-10,,Icom ic-7300,,Anytone AT-D878UV PLUS",,LINCOLN II+. Age : 150
Subject: Re: Mobile help Thu Feb 06, 2020 9:05 am
I wouldn't think you need it.
John 1210 New Member
Call Sign : 108CT234 Posts : 19 Times Thanked : 0 Join date : 2019-10-26 QTH or Location : Kirkintilloch/ Glasgow Equipment Used : YAESU FT450D 6mtrs Age : 64
Subject: Re: Mobile help Thu Feb 06, 2020 11:55 pm
Would it do any harm if I connected it to the earth of my vehicle
GaryWilson CT Directors
Call Sign : 26-CT-1836 Ham 2E0GGQ Posts : 4169 Times Thanked : 350 Join date : 2019-06-27 QTH or Location : Redcar, North Yorkshire. Equipment Used : Radios & Wires & Stuff! Age : 59
Subject: Re: Mobile help Fri Feb 07, 2020 5:36 am
Hello John,
The earth on the back of the 450D is an RF earth. You would usually connect it to a ground spike in the garden outside the shack. I wouldn't connect it to the electrical earth of your car that's not what it's for. I'm not an expert in mobile installations by any means but I think for a mobile install it's left unconnected (As is mine at home with no RF problems)
73's
Gary.
26TC62 Senior contributor
Call Sign : 26TC62, 26CT2817 Posts : 141 Times Thanked : 29 Join date : 2019-06-27 QTH or Location : Portsmouth Equipment Used : Yaesu 891, 10m pole, wire 5/8, T2LT
Subject: Re: Mobile help Fri Feb 07, 2020 7:42 pm
According to the schematic, the ground terminal is DC ground and RF ground. Therefore whatever you decide, it shouldn't make any difference.
BigTone Contributor
Call Sign : G8YMW or 26CT4498 Posts : 92 Times Thanked : 17 Join date : 2019-07-16 QTH or Location : Lincoln and Finningley Equipment Used : CRT 9900, Icom 705, Kenwood TS570, Icom 910 Age : 69
Subject: Re: Mobile help Fri Feb 07, 2020 11:53 pm
k0bg.com is your friend. Look (if you haven't) to bonding. eg Body to bonnet (the hinges are not a good RF conductor) and several places along the exhaust to body (to save re radiating from the pipe)
Sukivit likes this post
Northern Crusader Major contributor
Call Sign : M0GVZ / 26CT1760 Posts : 530 Times Thanked : 35 Join date : 2019-11-13 QTH or Location : IO94SA Equipment Used : Icom 7300, TS480, President McKinley, Albrecht AE6110, CRT Mike Age : 53
Subject: Re: Mobile help Tue Feb 11, 2020 5:30 pm
Those little ground screws on the backs of radios serve no purpose and are only there to keep old timers who don't know better happy. If connecting a ground to that screw solves a problem your problems started long before the radio, at the antenna feedpoint to be exact.
Today at 1:25 am by Mike90
Subject: Mobile help 
