[Amps] Ouch - 23 Ohms ?

[Dan Sawyer]

I agree it is confusing.

The coupler output reads 23 Ohms with a DVM.

If I connect 6 of the devices in to out, terminate the last device in 50 
Ohms, and then read the input with an impedance meter, simple antenna 
analyzer, the meter reads 22 Ohms.

The devices are Mini Circuits ZFDC-20-5-23.

I have not measured VSWR across 6 devices. I will try that.

Thanks - Dan


Dr. David Kirkby wrote:

>Dan Sawyer wrote:
>  
>
>>Thank you. The pickup tap reads about 23 Ohms. 
>>    
>>
>
>With what? DVM, MJF whatever, network analyser?
>
>  
>
>>If I string 6 of them 
>>together, out to in, and terminate the last one with 50 Ohms the 
>>impedance is about 22 Ohms.  
>>    
>>
>
>I'm just lost. What impedance is 22 Ohms?
>
>If the coupled ports are not properly temperminated (whatever properly 
>means in this case) then the results will be undefined.
>
>I'm having some difficulty in understanding
>
>a) What the devices are
>b) What you terminate in what.
>c) How you measure imedances and/or VSWR.
>
>
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