[TenTec] Tentec Orion & Oscilloscope question

[Curtis Rossow]

I agree with you. But I have found another cheep and dirty way to do the 
same thing. I have had good luck with it. Just cut off the center conductor 
of the PL-259 used on the coax. You will have a low capacity connection to 
the coax.

Curt NU7R



At 01:42 PM 11/25/2004, you wrote:
>Eric SENSI wrote:
>
>>2. If I can't find this RF bird sampler (the best solution IMO)... then I'll
>>go for the "T" shaped M/F/F plug on the ANT 1 output... Someone says that
>>the radio will not see the small impedance bump on HF even with an open
>>connection on this "T" shaped connector.
>>
>It is true that the open circuit stub of a "T" connector will have no 
>noticable or measurable affect on HF (or probably even VHF) frequencies. 
>However if you connect a piece of coax to the "T" then the stub is as long 
>as the coax plus the dimensions of that part of the "T". If you used 10 or 
>20 feet of coax running to the 1 megohm input of your o'scope this would 
>look like a 10 or 20 foot open (in a 50 ohm system 1 megohm is nearly 
>equal to an open circuit) stub, which would have some significant 
>reactance, possibly acting as a trap at one of the higher HF bands. 
>Therefore if you do use the "T" method you should use a small value 
>capacitor or large value resistor in series right at the T before feeding 
>any cable to run to the o'scope. Then the length of the open stub will 
>appear only about a centimeter or two long, and only matter at 1296 MHz 
>and up, as someone else has pointed out.
>
>DE N6KB
>
>
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