[VHFcontesting] DC injector for ICOM preamp?

[Tim Coad]

Thanks for all the replies...I did not realize they were not RF
switched....I think you just saved me a headache!

73

Tim - NU6S




On 1/5/08, Ray J <ray at w9ray.org> wrote:
>
> Tim
>
> make sure of the rated rf power input for your model preamp.. I thought
> some were just made for the 10 watt radios like the ic-451a
>
> also note.. the Icom sends 12 volts down the coax during receive  and
> removes the  power on tx.. the preamps  are not rf switched or
> anything,  so you will have to mimic that also..
>
> I see Down East microwave sells some injectors..
>
> BT    Pre amp DC power inserter, >1GHz Type "N" (F) conn     40.00
>
> BTM    Pre amp DC power inserter, >1GHz Type "N" conn (M) on Input, (F)
> on Output     45.00
>
> BTL    Pre amp DC power inserter, < 1GHz. Type "N" (F) conn     40.00
>
> BTLM    Pre amp DC power inserter, < 1GHz. Type "N" conn (M) on Input,
> (F) on Output     45.00
>
>
>
> Ray J
>
>
> Tim Coad wrote:
> > I have a 432MHz ICOM mast mount preamp I used to use with my
> IC471.  Though
> > my new IC7000 hears tons better than the IC471 alone, it does not hear
> as
> > well as the 471 + preamp.
> >
> > The Icom preamp DC is supplied via the coax from the 471, the IC7000
> does
> > not, (at least I cant find it), have this feature.
> > Does some one make DC injectors to put 12V onto the feed line?
> > Recommendations?
> > _______________________________________________
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> > VHFcontesting at contesting.com
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> >
> >
>
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