[ICOM] R7000 dumb question of the day

[Sheldon Daitch]

Here is something that can be used for a DC power block:

http://www.multicominc.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=MOS&Product_Code=ZFR-75DC&Category_Code=LBND_ADAPTR

But take a look here at this RF splitter:

http://www.picomacom.com/specs/pico/C/C17-C18.pdf

Which seems to block the DC on one of the taps.

This is also what you might want, but watch the price:

http://www.smelectronics.us/biast.htm

I can't speak for the needs of the R7000, in terms of DC protection.  Maybe it
already has a capacitor in the RF input circuit and you don't need the external power
block.

73
Sheldon
WA4MZZ

Bonddaleena at aol.com wrote:

> Hello. I've been having a lot of fun with my 'new' R7000. I use it with an
> RS discone (until I get my towers up) and for 50-900 Mhz, I use a Channel
> Master TV preamp, which works really well.
>
> I was in Lowe's today, and noticed they had a VERY small preamp for 900 Mhz
> to 2 Ghz, for $16. 13 db gain claimed.
>
> My question is this:
>
> It is a 'power through' model. No power connections available. Obviously,
> they send 12 VDC up the coax to power it. I assume it would be easy to put a "T"
>  connector before the preamp and supply it with 12 VDC via a small choke. My
> R7000 service manual is on the way, but am I to assume that providing 12 VDC
> to  the input side of the preamp will also place 12 VDC on the ant connector
> of the  R7000? Am I also correct in assuming that the R7000 will have a DC
> blocking cap  early in the signal path, after the antenna connector? I sure don't
> want to put  12 VDC into the radio and 'smoke it'. I was going to put a low
> voltage ohmmeter  on the N connector, but with my luck, I'll take out the front
> end of the radio!  I have noticed that the IF output, has a DC voltage
> superimposed on the 10.7 Mhz  signal.....
>
>
> thanks in advance!
>
> ron
>
> N4UE
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