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.
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