[CQ-Contest] stubs

[Barry Kutner]

Hi all - I am working on some band-reject stubs for my station, 
based on some of the archived info I've read on the reflector. I 
wonder if someone can give me a brief education on them, in 
regards to what impedances should be seen at the reject freqs.

For example, on 40m, a shorted 1/4-wave stub (23 ft) is supposed 
to null 10m and 20m. When I hook up an Autek RF-1 connected to 
a 50 ohm dummy load, with a Tee connector in the middle with the 
stub, I read a Z of 700 ohms at 14 MHz and 10 ohms at 28 Mhz. 
Are these figures near what they should be?

With the RF-1 which reading (Z, SWR, etc.) is the best to use to to 
tweak the null point?

Any info much appreciated.

Tnx/Barry


--
Barry Kutner, W2UP              Internet: w2up at mindspring.com
Newtown, PA         FRC         alternate: barry at w2up.wells.com


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