|The Double Zepp||The W3EDP||Longwire with MTFT||
Feeding the Double Zepp with Baluns
Feeding the Random Wire Double Zepp
The antenna left is a 2 x 13,5-m Double-Zepp at EA8/DK7ZB
Fed with 14 m Wireman cable
In the background is a monoband dipole as Inverted-Vee for 20 m
The antenna is fed with a Transmatch-Tuner and Baluns 1:1 or 1:4 for the bands 40m and up
|Ideal are capacitors with 350 pF,
here has the right C 140 pF, an additional plug-in-C has 100 pF, if the capacity is to low for tuning on any band. This box handles 700 Watts RF.
|The input is fed with a current Balun, the output is connected optional to a Balun 1:1 or 1:4. In this case with the Double Zepp in EA8 I need the following combinations:|
|40 m||Balun 1:1 with additional 100 pF|
|30 m||Balun 1:4|
|20 m||Balun 1:4 with additional 100 pF|
|15 m||Balun 1:4|
2x18 turns PTFE-cable bifilar
on FT240-43, connected to the output socket of the Transmatch
The Balun 1:4 on a FT240-43 can handle 1 KW. 2x8 turns PTFE-cable bifilar.
Parallel to the input is a C with 12 pF/1KV for a better SWR (here made with 4x12pF/500V).
In the input line is a current Balun with 9 turns of Aircell-5 coax-cable on FT240-43.
Also good for 1 KW. Picture down.
The Tuner with the current balun for the input and the output balun for the Wireman-cable