Topband: Bias Tee question

John G3PQA g3pqa at onetel.com
Mon Jan 9 03:53:00 PST 2012


> So far this project has been lots of fun I used W7IUV preamp design with 
> my own pc boards they work great best amps I've used before I just need to 
> finish the rest of the package and see how the whole system works.
> 73 Dave
>> I’m designing a multi element receive array which
>> incorporates the usual 0 deg hybrid
>> combiner, 180 deg phase inverter, and 2:1 transformer.
> I've got chokes and caps every where in my design

0.01 uF has approx 10 ohms reactance on lower end of 160m.. OK with single 
xfmr but may cause a little more loss or imbalance if used in all ports of 
hybrid and matching xfmr. 0.047uF might be better .
73
John 



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