Skip to main content

Finally back on 70cm. The dipole as-is can only cover the upper ~14 MHz of 70cm, but I'm going to see about getting some even smaller brass tubing so I can extend the legs even further. 🤔

And if that doesn't work, I have plenty of variable capacitors in my shack. 👍

#AmateurRadio #HamRadio

How much is that dipole in the window?
NanoVNA @ shortest length: 44.13-j6.785Ω @ 446 MHz (SWR of 1.278)
NanoVNA @ longest length: 39.59+j10.49Ω @ 433.8 MHz (SWR of 1.392)
#hamradio #amateurradio

reshared this

in reply to Neil E. Hodges

Giovanni - ZL2GX
Giovanni - ZL2GX
• •
Thicker tubing will give you a wider bandwidth but will also need to be slightly shorter for the same center frequency.
in reply to Neil E. Hodges

Neil E. Hodges
Neil E. Hodges
•
Verified it works by listening in on the N7MTC repeater for a while. :3
in reply to Neil E. Hodges

Gary @N8DMT
Gary @N8DMT
• •
Did you try varying the center (gap) spacing? Have focused on minimizing this with some dipoles in the past to good success. Did you incorporate a sleeve balun at the feed? Have had unbalanced feed dipoles yield narrower bandwidths. 73
in reply to Gary @N8DMT

Neil E. Hodges
Neil E. Hodges
•
I haven't tried adjusting the center spacing, no. As far as baluns go, I'm using four 205 ohm slip-on ferrite beads (Mix 61).
⇧