MFJ-9234 Mini Loop Tuner
Instruction & Technical Manual
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LOOP CONSTRUCTION
The loop can be constructed from wire, tubing, sheet, and an especially good material is 1” wide PC
board. However, finding a piece of PC board long enough to form into a circular loop for 7.175 MHz
may prove to be difficult! This leads us to the unique opportunity to
EXPERIMENT
while using the
MFJ-9234
Mini Loop Tuner
TM
to resonate the loop antenna you design. Here are some suggested
lengths known to work well:
MFJ-9234 Single-Band Loop Wire Lengths
Band
Length (feet)
Length (meters)
80-M
63.0 19.20
40
-M
28.0
8.53
30-M
20.0
6.96
20-M
13.0
3.96
17-M
9.0
2.75
15-M
7.0
2.13
12-M
5.5
1.68
10
-M
4.0
1.22
MFJ-9234 Multi-Band Loop Wire Lengths
Bands Length
(feet)
Length
(meters)
40/30-M
20.0 6.96
30/20-M
13.0 3.96
30/20/17-M
9.0 2.75
20/15
-M
7.0
2.13
17/15/10-M
4.0
1.22
The applications and parameters can be adjusted easily with the help of the
Freeware
programs
previously mentioned, and you may choose to design a totally new and unique loop antenna for on-air
experimentation. Designing an outdoor loop for a band such as 7 MHz could be a challenge and
result in a very good radiator and especially good receiving antenna for DX-ing and/or rag-chewing.
We, at MFJ, think the experimental aspects of the
Mini Loop Tuner
TM
are exciting, and can provide
hours of quality operating, even at QRP levels.
