[CQ-Contest] Stubs

[Jim]

 Some info from K1TTT site on stubs. Listed under filters.
 http://www.k1ttt.net/technote/techref.html
 
Jim, N2NRD.

 ----- Original Message ----- 
 From: "Joe" <nss at mwt.net>
 To: <cq-contest at contesting.com>
 Sent: Monday, May 06, 2013 8:49 AM
 Subject: [CQ-Contest] Stubs
 
 
 Getting ready for Field Day here.
 
 The only bands we seem to have problem on are 40 & 20 with the two 
 stations hearing each other.
 
 So plan on making up a pair of stubs, for each station.
 
 Now from wat i have found seems pretty simple.  and will this actually 
 be correct?
 
 It looks like the 1/4 wave (electrical) on 40 un shorted will block 0 an 
 pass 20  yes?
 
 and the exact same stub shorted will pass 40 and block 20  yes?
 
 so adding at the far end a small SPST toggle switch should make a easy 
 switch 20 or 40 stub  yes?
 
 Now I plan on using them in the usual manner right at the rigs with a 
 "T" connector.
 
 To make them we plan on using a MFJ 259B
 
 The way they say to make a stub using it is pretty plain and straight 
 forward and easy, "BUT"........
 
 I'm assuming I should include the "T" when making the stub to have it 
 include the extra length it is making.
 
 Now what do I do with the open end of the "T"?
 
 does it need to me terminated? like with a 50 ohm dummy load? o9r left 
 open is ok, or what?
 
 Anyone?
 
 Joe WB9SBD
 
 For Field Day The Yellow Thunder Amateur Radio Club
 WB9FDZ
 The field Day Zombies
 
 
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