5W of rf output should mean that the radio shouldn't require any more then 
5W to operate, at the minimum.
So, a 13.8V power supply at 1 amp is going to give you the minimum of 13.8 
W.
theoretically you should be able to get 5 watts out of the transistor with 
no more then a 500 milli amp power supply at 13.8VDC.
However, you must take into consideration the CPU in the radio, the lighted 
display and any other components that require powering while you are 
transmitting.
So, those things taken into consideration, you need at least another amp 
likely to be on the safe side.
and, you don't want to be running a power supply at 100 per cent duty all 
the time, or at least, not most power supplies of that size, because most 
new ones will start pulling things back as they heat up.
So, i would say a 2.5 to 3 amp power supply will work just great.
also, I believe the f 6A is likely rated for something closer to 8VDC, at 
least on battery power, so you could probably use a 3 amp 9VDC power supply 
instead of a full 13.8V one.
This would mean you could likely find a really heavy duty wall wart and use 
that.  Although, wall warts are seldom filtered and you will need a filtered 
supply to eliminate any hum.
10amp 13.8V power supplies are a dime a dozen in most places, and you can't 
hurt the radio by hooking it to a power supply with more current then you 
need.
anything filtered from 9 to 13.8Vdc and with a minimum amperage rating of 
2.5 amps will work for you.
batteries america might even sell a battery saver unit that you can use to 
transmit on the radio.
73
Colin, V A6BKX
----- Original Message ----- 
From: "Robert Clark" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, May 05, 2009 5:59 PM
Subject: Re: Power supply question


>
> Blake,
>    The manual says 5 watts with the standard battery.  Page 41.
>
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> effect."
> I don't know what it would be, but I think it'd be good to hear someone 
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> "Gentlemen, what we have here is a terrifying example of the reindeer
> effect."
> --Jack Handey
> Robert & Dreamer Doll  ke7nwn
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