STACKING ??? HELP
Sun, 09 Feb 1997 23:14:19 -0600
Scott Francois wrote:
> THANKS FOR ALL REPLIES AHEAD OF TIME. MY NAME IS SCOTT-W9SF.
> HERE IS MY QUESTION:
> KT34XA AT 90FT.
> ANOTHER KT34XA 33FT. DOWN ON THE TOWER (57FT FROM GROUND)
> DUNESTAR WX0B STACK MATCH
> BOTH POINTED AT EU
> I DID SOME SIGNAL REPORTS IN TO EU ON 20MTRS. AND WAS NOT REAL HAPPY WITH
> THE FINDINGS. THE HIGH BEAM ALWAYS HAD A MIN. OF 1-2 S UNITS BETTER SIGNAL
> THE TWO OF THE STACKED. SAME FINGINGS ON 15MTRS.
> NOW TWO OF THE GUY WIRES ARE CLOSE THE THE FRONT END OF THE LOW BEAM.
> THE GUYS ARE INSULATED FROM TOWER.
> ANY IDEAS? I HAVE NEVER STACKED BEFORE AND NOT SURE WHAT TO EXPECT BUT I
> DID EXPECT THE STACK TO HAVE A BETTER SIGNAL THAN THE HIGH BEAM.
> THANKS AGN DE W9SF SCOTT (NORTHERN BLACK HOLE)
First of all thanks for the purchase of a Stack Match. You are correct
and should see a better signal with both beams, most of the time.
I say most since, sometimes the higher, or lower will be stronger than
the stack, depending on angle of takeoff and arrival for that path.
I quite often find my lower or even the middle antenna louder than the
top and the stack, but usually the stack is best. SO.....
I have seen this problem come up now and then, and usually it turns out
to be an out of phase problem. Make sure you have the Baluns exactly
the same. If they are, maybe they were mismarked at the factory and you
should try flipping one of them, (bottom one is easier I would guess).
I am also guessing that the upper and lower antennas do have good SWR
and hopefully almost identical curves.
I am writing this to the whole reflector to let everyone know that we
are very willing to help anyone with Dunestar products. Please feel
free to email Ron and me or call us as well.
Let me know what you find Scott.
Hang in there, It will work, just gotta figure out whats going on.
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