I have run a Stackmatch for maybe 10 years on a 2-high stack of small
tribanders. If you have a fussy amp, you will probably have to retune,
because in my experience the two antennas vary markedly from one
another, due to different distances above ground, etc. The compromise
impedance transformations in the Stackmatch are just that. Fortunately,
my SDB-220 just keeps on going.
73, Pete N4ZR
The World Contest Station Database, updated daily at www.conteststations.com
The Reverse Beacon Network at http://reversebeacon.net, blog at
reversebeacon.blogspot.com
On 4/3/2010 1:03 AM, Joe Subich, W4TV wrote:
> Remember, the N4TZ system is for monoband antennas and does
> does not work with multi-band antennas. Stacks of Tribanders
> - particularly three antenna stacks - need a stack controller
> that properly matches the paralleled impedance over the entire
> operating range for any combination of antennas - not some
> compromise that requires retuning the amplifier (particularly
> high gain triodes with sensitive grids) as the configuration
> changes.
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|