[TowerTalk] Tuners and Matchers

[Bob Nielsen]

On Thu, Jan 15, 2004 at 06:55:40PM -0600, Mark Beckwith wrote:
> >So, is the L-Match making a comeback in everyones
> >thinking because depending on how you set it up,
> >it can match from 5 ohms to 3000 ohms where the
> >other are not that robust.
> snip
> > Comments please
> > Lee - k0WA
> 
> I'm using plain-ol' Dentrons on everything higher than 3.5 MHz.  (some have
> had the inductor switch removed).  For 160M I use a homebuilt T-network with
> big components and a pretty beefy coil.  It does everything I could want.
> 
> I imagine bandwidth could be a consideration which could depend to some
> extent on the antenna and the matching network circuit chosen.  I have a
> nearly full-sized top-loaded vertical and I dip my SWR on the fly using one
> of the capacitors which I went ahead and calibrated by frequency - so one
> knob stays put, the other has a scale from 1800 to 1950.  The inductor is
> fixed hardwired.  Works fine.
> 
> The L-network saves you a capacitor.  That could make a difference.

One thing about the L-network is that it is either step-up or
step-down, not both. Not too many antennas require both, however. A Pi-
or T-network can be considered as two L-networks back-to-back, which
can be helpful in analyzing your requirements.

Bob, N7XY