Honest Bob's Maple Leaf Communications
Ready to take your order
Maple Leaf Communications
maple leaves
How can we help?
box top box bottom box top

We have tables at most of the hamfests in southern Ontario. Come check us out!

READ MORE...

box bottom box top

Our sister company, Paladin RF, offers a line of high-quality duplexers and filters. Their small size, and especially their small prices, will probably surprise you but they are innovative, no-compromise, top-performing products. Check us out!

READ MORE...

box bottom box top

Check out our fun page for free stuff! Calculate various antenna dimensions, determine best height above the ground, look up coaxial cable properties, check the ideal stripping dimensions for mounting various connectors, and more.

READ MORE...

box bottom

Calculator - Dipole & Inverted 'V'

Use At Your Own Risk

Maple Leaf Communications assumes no responsibility for material calculation errors or other deficiencies in the calculator offered here.

Installed antennas can be affected by buildings, trees, mast properties, other antennas, ground conditions, and more.

Dimensions reported by this calculator should be considered only approximations of the length(s) of material required.

When ordering materials and building your antenna, allow a little extra length and trim as necessary instead of building and installing the antenna before discovering that it is too short.

The Half-Wave Dipole & Inverted 'V'

The very-popular centre-fed, half-wave dipole and inverted 'V' antennas can be calculated below.

The basic formula for the half-wave dipole is 468/freq (in Mhz), but it can be modified below to your needs.

When the dipole will be installed in an inverted 'V' configuration (rather than straight-horizontal) the formula should be modified to reduce the length . A percentage adjustment can be entered below according to the following guidelines:

No apex angle (straight-horizontal)
apex angle 90° apex angle
105° apex angle
120° apex angle
135° apex angle

divided by Freq. Mhz

percent smaller for an inverted 'V'

Straight Dipole

Total Length:    or  or 
Each Leg:    or  or 

Inverted 'V'

Total Length:    or  or 
Each Leg:    or  or 
box top

We've improved our already-good "Shorty 40/80" antenna to perform even better in the phone portions of both the 80m and 40m bands.

If you're looking for an antenna on the lower bands, especially for a property with limited space, check it out!

Also check out our new 1:1 In-Line RF Choke to keep RF from coming into the shack along your coax.

READ MORE...

box bottom box top

'Til the end of this year, we are running a special on surplus fiberglass military mast sections.

Prices were good before on these but the boss says now they must be cleared out. We need more space; they have to go!

READ MORE...

box bottom box top
Deal Item Price
Calculator $1.00
Cell Antenna $2.00
NMO mount
with coax
$5.00
Motorola UHF Antenna (NMO) $20.00
OPEK in-ear speaker/mic $12.00
Tap light for
unwired dark spots
50 cents
Various night lights 50 cents

READ MORE...

box bottom