This sounds right, Lou.
And, as a result, I think I'll go with the power supply idea.
Thanks for your confirmation of my suspicions.
73 from Tom Behler: KB8TYJ
----- Original Message -----
From: "Lou Kline" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 20, 2007 11:23 PM
Subject: Re: three more TS480 questions
> Hi Tom.
>
> I would be more worried about IR losses than RFI. I think the voltage
> drop
> from a long wire like that could be fairly significant at 12 volts unless
> your wire diameter is large and you have very very good connections.
>
> I have found that when you are running in excess of 20 amps, even fairly
> small amounts of resistance can significantly adversely affect your rig's
> performance. I found this out the hard way a couple of years ago when I
> couldn't seem to get more than 75 watts out of my Icom IC706 and was
> getting reports that it was FMing on voice peaks. While I couldn't really
> see a problem with the ohm meter, I soon discovered the problem when I
> touched the wire near the binding posts and nearly burned my fingers. It
> seems that the crimp on wire ends made a good enough connection to look
> good for a continuity test, but were resistive enough to generate quite a
> bit of heat when running an HF rig full power. A couple of minutes with a
> good hot soldering iron and the power output came right up to 100 watts.
>
> 73, de Lou K2LKK
>
>
>
> At 06:40 PM 11/20/2007 -0500, you wrote:
>> Hi, Ed.
>>
>>Well, let me explain it to you this way:
>>
>>I probably won't be using the TS480 while truly mobile. The reason is
>>that
>>I can't get my screw-driver antenna on the back of the RV as high as it
>>needs to be above the roof line to travel safely and keep things legal.
>>
>>Therefore, I will be using the TS480 only when camping and able to use
>>shore
>>power.
>>
>>I checked with my RV mechanic at the dealer where we bought the motor home
>>about running the TS480 off battery power. He is a ham, and he indicated
>>to
>>me that the connections to my batteries are far enough away from where I'd
>>have the rig that I'd have to run quite a cable to get from the battery
>>source to the rig. He warned me that introducing more cable into the
>>system
>>like that might create potential for more RFI.
>>
>>I don't know how accurate or true that is, but this is what he told me.
>>
>>I don't know if this helps explain things or not, so if you have other
>>thoughts, please let me know.
>>
>>You can e-mail me privately at
>>
>>[log in to unmask]
>>
>>Thanks, Ed, and 73 from Tom Behler: KB8TYJ
>>
>>----- Original Message -----
>>From: "Ed Malmgren" <[log in to unmask]>
>>To: <[log in to unmask]>
>>Sent: Tuesday, November 20, 2007 3:26 PM
>>Subject: Re: three more TS480 questions
>>
>>
>> > Tom, I am stumped about your wanting a power supply for your M H rig.
>> > The
>> > only way you will be getting 120 VAC is to be plugged into shore power
>> > or
>> > running your generator or having a large inverter to provide this
>> > voltage.
>> > If your rolling down the road mobile you will have to be running your
>> > on
>> > board generator or a large inverter. I am taking the 12 volts off the
>> > batteries and the alternator in the engine keeps the batteries up and
>> > if
>> > your plugged into shore power the bats are being charged so I guess I
>> > don't
>> > understand what your looking for. sorry for the band width.
>> > Ed K7UC
>> >
>> >
>>
>>
>>
>>
>>--
>>No virus found in this incoming message.
>>Checked by AVG Free Edition.
>>Version: 7.5.503 / Virus Database: 269.16.1/1140 - Release Date:
>>11/19/2007 7:05 PM
>
> Louis Kim Kline
> A.R.S. K2LKK
> Home e-mail: [log in to unmask]
> Work e-mail: [log in to unmask]
> Work Telephone: (585) 697-5740
>
>
|
