Is an External power supply necessary ? - Toyota FJ Cruiser Forum
 
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post #1 of 7 (permalink) Old 09-09-2013, 07:56 AM Thread Starter
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Is an External power supply necessary ?

I am in the market for a Ham Radio for my FJ. Was considering the Yaesu FT-7900R. Is it essential to purchase a separate Switching Power Supply for it, or can I just power it off my S-Pod ?
Gigaparts.com was recommending an external separate Samlex 23A Switching power supply.

What say you Ham experts?

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post #2 of 7 (permalink) Old 09-09-2013, 08:09 AM
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Re: Is an External power supply necessary ?

No you don't

You really don't even need to go through the s-pod. Unless you have open circuits in it, that you will never need . You only need to power this to a fuse panel. Through the s-pod will actually give you a triggered relay for your ham, but that is overkill .

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post #3 of 7 (permalink) Old 09-09-2013, 11:39 AM
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Re: Is an External power supply necessary ?

Preferred wiring is a dedicated circuit, positive and negative conductors with fuses, straight to the battery terminals.

This is to reduce noise generated by other electronics. It also provides redundancy in case of an emergency where your wiring harness may be compromised.
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post #4 of 7 (permalink) Old 09-09-2013, 11:51 AM
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Re: Is an External power supply necessary ?

I suppose I could follow this up with having a second fuse panel, just for these types of accessories. I prefer not using the factory electrical system for any accessories I put in.

There are 2 extra fuse panels in my truck. One under the passenger kick panel and one in the rear cargo area (where the jack is) That way i have versatility on adding stuff

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post #5 of 7 (permalink) Old 09-09-2013, 12:06 PM Thread Starter
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Re: Is an External power supply necessary ?

Thanks for the replies. Very helpful. Yes I have a extra fuse box in my passenger side kick panel that has 2 openings as well as the Spod.

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post #6 of 7 (permalink) Old 09-09-2013, 12:14 PM
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Re: Is an External power supply necessary ?

Good deal, You are all set.
Its a short run over there, from wherever you decide to mount it anyway

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post #7 of 7 (permalink) Old 09-14-2013, 11:09 PM
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Re: Is an External power supply necessary ?

Quote:
BoiseFJ previously said: View Post
I am in the market for a Ham Radio for my FJ. Was considering the Yaesu FT-7900R. Is it essential to purchase a separate Switching Power Supply for it, or can I just power it off my S-Pod ?
Gigaparts.com was recommending an external separate Samlex 23A Switching power supply.

What say you Ham experts?
Perhaps they were talking about use in the home, not the vehicle? Why you would want to use a power supply in a vehicle for a mobile radio escapes..

The recommended method for powering your radio is to connect it directly to the battery. You will need fused connections or use circuit breakers.

I use a relay inline to the battery to shut off the power when my key is off. It is set up to power the relay when the ACC position is selected. I have a 40A circuit breaker near the relay and also both lines to the radio fused with 25A fuses.

When I do remove the radio for use in the shack I have a 30A switching power supply that will power the radio and any accessories I may want.

Good Luck!

Bill - CruisingAZ
W7PVA
2007 Sun Fusion Plain Jane
No lift - No winch - No Roof Rack
Yaesu FT-857D - Comet SBB-15 and ATAS 120A Antennas - Bandi and Comet Mounts
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