Here’s my variation on dual band dipole from drawings found on the web.
Mine is made from stainless welding wire with 1.5mm diameter. The fasteners are M4 A2 /stainless/ machine screws, nuts, and washers.
After adjustments, the total length for the 2-meter band is approx. 960mm in total. The spacing between two halves is about 20mm.
For the 70-centimeter band, the total length is about 310mm, spacing is the same.
Adjustments was made on-site with MFJ-269 antenna analyzer. Minimum SWR for the 2m band is 1.3 and for the 70cm band is about 1.7.
The feeder is SAT TV RG-6 coax I already had. The cable /in the shack/ was cut in small portions until the SWR as at the antenna feed point was obtained.
note the shortest possible wires during adjustment
The bandwidth on VHF at SWR=2
and the SWR on UHF — not very good, but it’s acceptable.