Description
| TRI7 101520 Bands | 10 m | 15 m | 20 m |
|---|---|---|---|
| Gain dBi: (20 meters above the ground) |
13.8 | 12.0 | 11.5 |
| Gain dBd free space: | 6.1 | 4.3 | 4.2 |
| F/B: | 18 | 15 | 15 |
| Active elements: | 3 | 2 | 2 |
| Bandwidth kHz S.W.R. ≤ 1.5:1 |
800 | 450 | 350 |
| Boom Length: | 420 cm/13.75 ft | ||
| Turning radius: | 600 cm/19.68 ft | ||
| Feed line required: | 1 x 50 Ohm | ||
| Max tower lift side: | 130 cm/4.26 ft | ||
Longest element:
1110 cm/36.45 ft
Power handling:
10 KW
Wind area:
0.68 m²/7.30 sq ft
Wind load 130Km/h:
558 N
Wind survival*:
130 Kmh – 80 MPH
Tower Leg/Mast diameter:
40/60 mm – 1.57/2.36 inch (larger on request – specify on order form)
RF Choke:
3 KW rated included
Weight (excluding packaging):
27 Kg/59 lb
Materials used
Tubes and plates:
aluminum alloy 6060T6
Hardware:
stainless steel
Insulating clamps:
Polypropylene UV resistant
Manual:
English
*Wind survival is the maximum wind speed to which the antenna can be subjected without incurring permanent deformation (calculated in the absence of ice)
Mark Pride –
Posted on behalf of Dan, NA1E
Bought the MomoBeam Tri 7. Been off the air for 20 years. This antenna is very well designed and built. My wife and I put this together. Went together fairly easily. We got it up on the 90 ft tower, Friday afternoon just before the CQWW DX SSB contest. I ended up working a lot of stations in the contest on Saturday. I gotta say that I got through most pileups with one to 3 tries running only 100 watts! I ended up in one pile up that was very crowded and it took about 9 tries! Still barefoot. Got great reports. Highly impressed with this antenna! Would recommend in a heart beat. I’ve seen the Penta 10 up on a tower and it’s impressive also! The only reason I didn’t buy it was I never work the WARC bands or I would have. Thank you to MOMOBEAM for an impressive design and ease of assembly. SWR is under 1.5 across all of 14 and 21 MHZ bands. The 28, 29 MHZ bands are fairly flat under 2.1 SWR. That is excellent! Don’t hesitate to buy a MOMOBEAM! You won’t be disappointed. Thanks! 73, Dan NA1E.