Beta-Match kit for MP-1 and HF-P1

Under certain earth conditions the length of the coaxial cable is unusually sensitive to the tuning, at the same time the foot resistance at the resonance frequency is in the range of 20-25 Ohm. I could observe the whole thing especially on 40m, but not yet on the higher bands. The solution to use 4 10m long radials is a little reluctant for me, because it counteracts the main advantage of the MP1. I've found another solution that always works in extreme conditions at the first go: A beta match directly to the foot and a mantle wave barrier directly behind it.

The whole thing fits into the Fuchskreis housing and can be screwed directly onto the MP-1/HF-P1 foot.

Kit contains all necessary components incl. drilled housing and self adhesive label

Beta-Match for MP-1 and HF-P1 (ready to use)

Under certain earth conditions the length of the coaxial cable is unusually sensitive to the tuning, at the same time the foot resistance at the resonance frequency is in the range of 20-25 Ohm. I could observe the whole thing especially on 40m, but not yet on the higher bands. The solution to use 4 10m long radials is a little reluctant for me, because it counteracts the main advantage of the MP1. I've found another solution that always works in extreme conditions at the first go: A beta match directly to the foot and a mantle wave barrier directly behind it.

FACTORY ASSEMBLED

ELECRAFT AX1
DUAL BAND (+)
WHIP ANTENNA
• High-Q loading coil resonant on 20
and 17 meters—two great bands for
QRP SSB/CW/data operation
• Band selected via slide switch
• Works with your rig’s ATU to
eliminate whip or radial length
adjustments
• 15 meter coverage with ATU
• Disassembles into two pieces
to fit into small “grab & go” bags,
such as the Elecraft ES series
• Includes 13’ (3.3 m) radial wire
(required for transmit use)
You’ve just crested the hill...the
view is amazing. Time to stop,
take a drink, and check out the
bands. Your radio deploys quickly,
but what about your antenna?
This is where our AX1 whip really
shines: getting you on the air in
seconds, from anywhere. Use it
HT-style with a hand-held rig; on a
picnic table with an AXB1 whip
bipod; or with a camera tripod and
an AXT1 tripod adapter. (AX-Line
accessories shown at right.)
Using the AX1 with an ATU
eliminates tedious length
adjustments. Just select a band,
tap the antenna tune switch, and
go for it. A wide-range ATU can
also extend coverage to other
bands, including 15 meters.
Whether you use the AX1 as a
‘stealth’ field antenna, for
pedestrian mobile, or as a versatile
backup, it’ll be ready when you are.

AXT1
TRIPOD ADAPTER
• Allows any antenna with a BNC
connector to be mounted on a
standard camera tripod
• Includes permanently installed ¼-
20 fastener
• Three spare holes for guy wires or
other hardware

AXB1
WHIP BIPOD
• Prevents tipping of whip due to
light wind or vibration; legs
conform to irregular surfaces
• Use with a right-angle adapter
such as an Elecraft #BNC-RA
• Fold-up legs include holes for
use with tie-downs, if needed
in heavier winds