23 aprilie 2014

1:1 UnUn, Choke BalUn

A few days ago I noticed that, while trying to work on 40m from mobile, my Icom IC-7000 suddenly stops, powering off.
So, investigating the trouble I put a (very) Ugly Balun at the output of the radio.
The problems went off so I planed to make some sort of Choke balun.
This broadband transformer is a 1:1 and block the current mode current.
Here it is the making off:

The main reason for making it with two RF connectors is that the choke is used in mobile installation and after it there is a small lenght of coaxial cable.
 73 de YO3HJV

2 comentarii:

Dan B spunea...

E bum acest chock - si eu am unul din 2012 ptr ca la antena undita din portabil se intorcea cam mult RF in 40 si 80 m si nu mai iesea din emisie dupa ce ptt-ul era off. Cu el totul este ok. ... Numai bine , Dan yo3gh

Adrian (YO3HJV) spunea...

Si e pus langa TRX sau langa antena?

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