Open-sleeve principles VHF-Duoband principles Duoband-Yagi 6m/10m 10m-Dipole+ 3-El.- 6 m Triband-Yagi 6m/4m/2m   Duoband-Dipol 2m/70cm 2m/70cm 2+2/3 El. 2m/70cm 4+5 El. 2m/70cm 5+8 El.

Yagi with 5 Elements on 2 m, 8 Elements on 70cm and one Feedpoint

Version 1: Ultralight with 3,2-mm-Elements

Version 2: With 8- and 10-mm-Elements (see down), built by SQ9VPA

The Yagi is optimized for the CW/SSB-parts of the bands, but usuable for the full bands.

For the complete 2m-data see the  5-Element-ultralight-Yagi

And here for the real hard boiled OMs:

Winter-QRP-Contest from JN99CL, tnx to Petr, OK2AIA

 Band

Gain

F/B

3dB-angle hor.

3dB-angle ver.

144,3 MHz

8,45dBd

24dB

51,0°

64,4°

432 MHz

8,86dBd

14dB

28,2°

54,2°

Element-Lengths and Positions, all Elements 3,2mm-Aluminium-Welding-Rods (exept Radiator) for the lightweight-Yagi. For the station at home Lucjan, SQ9VPA has redesigned the Yagi with 10-mm-elements.

El.-Nr.

Element

Length (3,2 mm)

Position

1

Reflector for 2m

1035 mm

0 mm

2

Reflector for 70cm

326 mm

160mm

3

Radiator 2m and 70cm

995 mm (4mm)

280 mm

4

Director 1 for 70cm

329 mm

304 mm

5

Director 2 for 70cm

320 mm

405 mm

6

Director 1 for 2m

954 mm

430 mm

7

Director 3 for 70cm

292 mm

550 mm

8

Director 4 for 70cm

280 mm

800 mm

9

Director 2 for 2m

944 mm

950 mm

10

Director 5 for 70cm

310 mm

980 mm

11

Director 6 for 70cm

284 mm

1160 mm

12

Director 7 for 70cm

299 mm

1450 mm

13

Director 3 for 2m

929 mm

1480 mm

The 5/8-El.-Yagi with 8- and 10-mm-Elements (redesigned by SQ9VPA)

(see pictures below)

The 5-/8-Element-Duoband-Yagi as portabel version, built by Gökhan, TB1CIG

El.-Nr.

Element

Position

Length (8 mm) Length (10 mm)

1

Reflector for 2m

0 mm

1034 mm 1032 mm

2

Reflector for 70cm

160mm

322 mm 319 mm

3

Radiator 2m and 70cm

280 mm

972 mm (12 mm) 972 mm (12 mm)

4

Director 1 for 70cm

312 mm

321 mm 318 mm

5

Director 2 for 70cm

405 mm

313 mm 311 mm

6

Director 1 for 2m

430 mm

934 mm 928 mm

7

Director 3 for 70cm

550 mm

278 mm 273 mm

8

Director 4 for 70cm

800 mm

262 mm 256 mm

9

Director 2 for 2m

950 mm

921 mm 915 mm

10

Director 5 for 70cm

980 mm

300 mm 297 mm

11

Director 6 for 70cm

1160 mm

268 mm 262 mm

12

Director 7 for 70cm

1450 mm

286 mm 282 mm

13

Director 3 for 2m

1480 mm

911 mm 904 mm