in band

1695 links - and 9 categories

Helical loop antenna for 20 meters
A Helical Loop Antenna for the 20-meters Band

[ Hits: 6075 | Votes: 3 | Rating: 5.67 ]

2m VHF antennas with high gain - DK7ZB
2m SSB CW 12 5 Ohm Yagis with extrem high gain and small bandwidth These ...

[ Hits: 8263 | Votes: 12 | Rating: 7.75 ]

40-80 Half-Extended Double Zepp Antenna - W5DXP
A dual bander for 80M and 40m An Extended Double Zepp EDZ is a 5 ...

[ Hits: 11408 | Votes: 9 | Rating: 4.44 ]

Shorty Forty Antenna
Short dipole antenna for 40 meter ham band Can be put up in the space ...

[ Hits: 12445 | Votes: 8 | Rating: 7.74 ]
Trapped dipole for 40-80-160 meters ^pop
Build a space efficient trapped dipole antenna for 40 80 160 meter bands using RG ...

[ Hits: 97004 | Votes: 119 | Rating: 6.24 ]

40 M. triangular full wave vertical loop - W5DXP
A 40 meters band full wave antenna project plan with model adding the Missing Leg ...

[ Hits: 13292 | Votes: 11 | Rating: 7.08 ]

Echelon-Log Beverages - W8JI
About beverage antennas Enhanced F B Beverages Bandwidth of Directivity arrays This article describes two ...

[ Hits: 1861 | Votes: 1 | Rating: 10 ]

G5RV Antenna Homebrew - 9M2ZAK
Homebrew G5RV a simple multiband antenna This article shows detailed pictures of a G5RV home ...

[ Hits: 1590 | Votes: 4 | Rating: 7.25 ]

2-Element-DK7ZB-Quad for 5 Bands
10-12-15-17-20m A description was in the German Ham-Magazine "Funkamateur" in Issue 11/2003

[ Hits: 14913 | Votes: 14 | Rating: 5.79 ]
W4JOH Cobra Antenna
The original Cobra antenna is a multiband 160 or 80 to 10 meter designed by ...

[ Hits: 1711 | Votes: 1 | Rating: 10 ]

Stacking for 50MHz
Summary of discussion on stacking antennas on six meter band

[ Hits: 1181 | Votes: 1 | Rating: 10 ]

DK7ZB 144 mhz Yagis
High gain good pattern and acceptable bandwidth These aims can be realized with a radiation ...

[ Hits: 1909 | Votes: 7 | Rating: 6.86 ]
Copper Cactus Single Coax Feed
Single Coax Feed to Multi-Band Copper Cactus Antenna.

[ Hits: 1326 | Votes: 1 | Rating: 10 ]

Eliminate QRM from 6 meters band
The circuit described below will substantially reduce or completely eliminate interference from almost any local ...

[ Hits: 1571 | Votes: 1 | Rating: 10 ]

Near-Real-Time F2-Layer Critical Frequency Map
This map can be used to determine the frequencies that will always be returned to ...

[ Hits: 5271 | Votes: 24 | Rating: 4.84 ]

SB220 SB221 arcing problems improvements mods
This article explores the claim an amplifier might arc from a parasitic oscillation damaging capacitors ...

[ Hits: 1309 | Votes: 2 | Rating: 10 ]

N4IP HF and 6 Meters amplifier
A solid state amplifier for HF and 6 meters band by N4IP

[ Hits: 10703 | Votes: 5 | Rating: 9 ]
11 KW Linear amplifier by I0JX
Use 4CX10000D 8171 RF output power of 11 KW in key down carrier on all ...

[ Hits: 24615 | Votes: 33 | Rating: 7.86 ]
G3YXM 500 W PA
40-80-160 meter band linear amplifier

[ Hits: 3622 | Votes: 3 | Rating: 7 ]
SUPERVOX - S 300
AM CW SSB linear amplifier for 160 80 and 40 meter band

[ Hits: 3269 | Votes: 2 | Rating: 5.5 ]