[Elecraft] RE: Delta-4 switches

[Steven Pituch]

Steve Said:
>>>MY ISSUE:  Even though the HexBeam's 20m VSWR measurements appear quite
normal made
>>>directly at its shack feedline connector using the 259B meter, they are
VERY DIFFERENT when
>>>measured through a Delta-4 switch.  The GAP antenna's VSWR's are very
normal-looking when
>>>made through its Delta-4 switch, but the HexBeam and 259B meter are NOT
HAPPY with a Delta-4
>>>switch in place.  (The HexBeam's Delta-4 switch is actually a separate
switch, not the same one the
>>>GAP is connected to.)  

Steve,
Have you swapped the two Delta-4s to see if the problem with the Hexbeam is
affected by both switches or just the one originally connected to the
Hexbeam.
If just one of the switches has the problem, you've isolated the problem.
If they both have the problem then something unusual is  affecting both
switches.  Perhaps a current imbalance is on the coax for that antenna and
it can not be handled by the switch.  I wonder if a current balum made of 50
ferrite beads would help in that case.  Or you could coil up the coax at the
base of the antenna to made a current balun; six turns 6 inches in diameter
is the usual configuration, but you may need more since it is a stubborn
case.

Sorry I don't know enough to really help you.  An antenna switch is a luxury
I don't yet have.  I still must use the Armstrong method.

Regards,
Steve, W2MY/5
http://users.ev1.net/~spituch/, Corpus Christi, TX, ELl7
QRP/ARCI 8351, FPQRP 1025, NJQRP 25, QRP-L 269, FISTS 3150, ARS 142, NEQRP
281, NWQRP ??, 10-10 61720, NORCAL 691, K2 #402 

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