Topband: Feedpoint of short RX vertical

2014-06-07 Thread luc kerkhofs via Topband
Hello,   trying to improve my RX setup, I have a question .   When feeding short RX verticals with a coil and resistor in series, does it make sense to decouple the feedline at the feedpoint with a braid breaker ?   73 Luc ON4IA _ Topband Reflector Archives -

Re: Topband: Feedpoint of short RX vertical

2014-06-07 Thread dl8yhrfrank--- via Topband
hi luc so you use a hi z rx arrya and you have matched the 7m long radials with a coil in resonaze? VY 73 frank -Ursprüngliche Mitteilung- Von: luc kerkhofs via Topband lt;topband@contesting.comgt; An: topband lt;topband@contesting.comgt; Verschickt: Sa, 7 Jun 2014 9:13 pm

Re: Topband: Feedpoint of short RX vertical

2014-06-07 Thread Tom W8JI
When feeding short RX verticals with a coil and resistor in series, does it make sense to decouple the feedline at the feedpoint with a braid breaker ? There is no universal answer. The particular installation determines whether or not decoupling is necessary. Sometimes a ground rod alone is

Re: Topband: Feedpoint of short RX vertical

2014-06-07 Thread luc kerkhofs via Topband
Tom,   one of 2 elements is very close to the house ( 20 ft ) and coax is lying ON the ground, so I guess it is best to use a braid breaker ?   In fact it is a test setup . I also have a receiver 500 meters inline with the antenna direction so I can check the F/B of my test setup   Luc    

Topband: Fsj4 series heliax around a rotor

2014-06-07 Thread Bill Wichers
Sorry for this not being entirely topband-related, but I'm hoping some people here have tried this. I have a beam on a rotor than has lmr400 feeding it now. The cable has been damaged by critters that like snacking on polyethylene. I'm thinking about replacing the lmr400 with fsj4-50b heliax

Re: Topband: Fsj4 series heliax around a rotor

2014-06-07 Thread Jim Brown
This would be a natural topic for Tower Talk. Access via contesting.com 73, Jim K9YC On 6/7/2014 7:03 PM, Bill Wichers wrote: I'm thinking about replacing the lmr400 with fsj4-50b heliax since I have several thousand feet of that on a reel. I'm also thinking that the corrugated copper

Re: Topband: Feedpoint of short RX vertical

2014-06-07 Thread Jim Brown
On 6/7/2014 12:13 PM, luc kerkhofs via Topband wrote: does it make sense to decouple the feedline at the feedpoint with a braid breaker ? It DOES make sense to decouple the feedline. I've never heard of a braid breaker. Under NO conditions should you open the shield == that prevents the