[Amps] 300 W single band mobile amp needed

[Roger (K8RI)]

On 10/7/2012 9:36 PM, Charles Harpole wrote:
> Could a motorcycle electrical system have enuf power to run such an
> amp?

Probably not except for short transmissions.

>  Even if so, would you want that much RF on an antenna mounted on
> your bike?

Not me, I have an implanted defibrillator.


>
> What is the RF power output of the in car radios of police and EMS ?

I don't k now about today's, but I had a number of mobile units that ran 
up to about 140 watts.  I think they were set for around 90 to 100 in 
actual use.

> What about the output on the rubber duckie on top of the hand mic,
> clipped to the officer's epaulettes?

IF and I emphasize the "if" there really is a problem they are likely 
running very close to where the RF has maximum effect and that is likely 
not a good place for the antenna.


OTOH many of us have hundreds of hours total using the HTs with the 
antenna right next to our heads.



73

Roger (K8RI)


>
> Charles Harpole k4vud at hotmail.com
>
>  > Date: Sun, 7 Oct 2012 20:21:31 -0400
>  > From: k8ri at rogerhalstead.com
>  > To: amps at contesting.com
>  > Subject: Re: [Amps] 300 W single band mobile amp needed
>  >
>  > On 10/7/2012 11:24 AM, rick darwicki wrote:
>  > > I have a friend that runs a motorcycle mobile on 20 Meters at about
> 100 watts. He is looking for a schematic/info/link
>  > for a simple no tune amp of about 300W that would just cover the SSB
>  > section of 20. Any help?
>  >
>  > It takes almost as many components for a solid state, single band ham
>  > amp as it does for the all band amp and to make it narrow band would
>  > take at least some of those components. Looking for compact size and
>  > inexpensive is different, but...
>  >
>  > The basic amp is the same layout and it requires the same protective
>  > circuitry and the same cooling area as an all band amp. The only real
>  > addition would be the filtering for one band instead of all bands and
>  > you'd still need it to keep the harmonics off 10 meters.
>  >
>  > Now that much power would also likely put the user into an area of RF
>  > intensity higher than allowed by the FCC which "probably" would not be a
>  > health problem but it's still more RF than allowed.
>  >
>  >
>  > 73
>  >
>  > Roger (K8RI)
>  >
>  >
>  >
>  > >
>  > > Thanks
>  > >
>  > >
>  > > Rick, N6PE
>  > > ================================== Talk is cheap... except when
> Congress does it.
>  > >
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