[VHFcontesting] DC injector for ICOM preamp?

[Ray J]

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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