[TowerTalk] OT ?? - Manual tuners

David Gilbert xdavid at cis-broadband.com
Sat Nov 27 19:42:40 PST 2010

I think in general that the lowest loss would occur with the lowest 
current through the inductor ... I'm not sure that always equates to the 
lowest inductance.

Whether the maximum capacity should be on the load side or the source 
side is a function of whether the load is higher or lower impedance than 
the source.  It is not correct that the maximum capacitance should 
necessarily be on the load side.  Check out L-networks and pretend that 
the side with no capacitor is actually a very large one with the plates 
fully meshed.

Dave   AB7E

On 11/27/2010 11:17 AM, Tom Osborne wrote:
> Hi Jim --
> I think the rule of thumb is, if you have a choice of tuning
> configurations, the one with more capacity and less inductance is
> the preferred one.  Seems like I also remember reading that if
> there's a choice on where to add the capacity, the preferred
> choice is on the output (antenna side).
> Hi all
> I *thought* I read somewhere that less capacitance is better because there
> is less chance of arcing the capacitor (especially if you are running high
> power on the lower bands).  Maybe that was an old wives tale or something.
> Learn something new every day.  73
> Tom W7WHY
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