Topband: Remote pre-amp power source

[Tom W8JI]

Something to keep in mind....

Even in a quiet location with a -10 dBd gain very directional antenna, the 
preamp can be thousands of feet from the antenna on 160 with no ill effects. 
My eight vertical array, for example, has about 600 feet of F6, then 2000 
feet of F11, then the preamp. It limits on propagated noise even in 
daylight.

Of course there are things that might make a remote amplifier useful, such 
as very lossy feedlines and very low gain antennas, but even 3000 feet of 
F11 type cable between antenna and preamp isn't an issue with normal 
antennas. What might be an issue is a compact loop or other very negative 
gain antenna.



----- Original Message ----- 
From: <k1fz at myfairpoint.net>
To: "Don Kirk" <wd8dsb at gmail.com>
Cc: "Topband" <topband at contesting.com>
Sent: Thursday, September 25, 2014 2:55 PM
Subject: Re: Topband: Remote pre-amp power source


>
> Hi Don,
>
> Pre-amp requires 12-18 volts at 130ma. (low band DXing- nightime use)
>
> This solar charger puts out 20 volts that could be reduced to 15 volts 
> with a three legged regulator. I was hoping to find a pre-assembled 
> charger & battery, but may have to build one.
> http://www.harborfreight.com/15-watt-solar-battery-charger-68692.html
>
> 73
> Bruce-K1FZ
>
>       What is the operating current and voltage of the preamp you plan to 
> use? Since it sounds like the preamp will be powered on all the time this 
> information will be key in the selection of the battery capacity and solar 
> panel rating.
> Don (wd8dsb)
>
> On Thu, Sep 25, 2014 at 1:30 PM,   wrote:
>
>       Anyone using, or know of a source, for a compact battery with solar 
> cell charger, to power a remote antenna pre-amp ?
> 73 Bruce-K1FZ
> www.qsl.net/k1fz/pennantnotes.html
>
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