Mike, here is an easy to understand document about coax stubs written by K2TR. It has diagrams as well. https://www.google.com/url?sa=t&source=web&rct=j&url=http://n
I can relate to this situation here at my SO2R setup, the problem being proximity (closeness) of the antennas to the station. My tower, with TH11 and 402-CD, is almost over the shack. For 10/15/20 I
You wont believe this guysbut I turned on my amp yesterday (in between soldering up a really cool YCCC SO2R+ kit) just to blow some dust out as I havent used it in a long time and believe it or not..
Dirty Tranny? And the amp is adding another layer of filtering to the exciters signal? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 9/13/2015 7:5
Hi Mike, I can think of a least one scenario, Mike, that meets all of the symptoms you've been describing...read below. My assumption, therefore is: You are measuring your interstation interference b
Crusty connection somewhere. Dirty Tranny?And the amp is adding another layer of filtering to the exciters signal?Joe WB9SBDSigThe Original Rolling Ball ClockIdle TymeIdle-Tyme.comhttp://www.idle-tym
I got two Ideas to test also, 1- switch radios? Make "B" be the transmitter and "A" the receiver and see if things are the same? This could possibly remove the "A" leaking transmiter. 2- Take the stu
My switch box is mounted in a crawl space under my house. It is about halfway from the tower to the shack. Most standard T connectors will fit on the switch box if oriented correctly. Could you possi
Yes, it can matter a LOT where along the line stubs are inserted. See my piece in NCJ, or here. http://k9yc.com/LocatingStubs.pdf 73, Jim K9YC _______________________________________________ CQ-Conte
On 9/8/2015 5:22 PM, Peter Voelpel wrote: That shorted stub cut for 20m has to be installed on the 20m station (station B) to suppress 40 and 15 there. On the 40m station (station A)you will need an
Put a 23' Shorted stub on the 40 feedline (passes 40 and 15, rejects 20 and 10) Put a 23' open stub on the tribander (passes 20 and 10, rejects 40 and 15). Of course, you won't be able to use 15 with
That's a great way to start. Especially as the solar cycle fades and 10/15 are not open. Then in the day, you run 40/20, and in the night you run 80/40. 73/jeff/ac0c www.ac0c.com alpha-charlie-zero-c
Yes, but there's a LOT more to it if you want to maximize the effectiveness of the stubs. It can matter a LOT (20-30 dB) where along the line stubs are placed, both with respect to the antenna and to
On Mon,10/5/2015 7:20 AM, Jukka Klemola wrote: Jim, I thought placing double stubs on the TX line is not so critical. The two band stopping stubs are supposed to be about quarter wave apart; on the h
Jim, I thought placing double stubs on the TX line is not so critical. The two band stopping stubs are supposed to be about quarter wave apart; on the harmonic band; and that should effectively remov
Recipe for this: http://www.yccc.org/Articles/K3NA_stubs.pdf Eric has done a wonderful job describing the ultimate stub system. But the stub construction method is critical to build; personally I li
What happens if you have a single stub, and it is placed right at the output connector? Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 10/5/2015 12
Hi Joe and others, Placing a stub at output connector helps a tad in case your output circuit that shows a low impedance to ground at the harmonic. That is typical for nearly all our equipment that h
Author: Rudy Bakalov via CQ-Contest <cq-contest@contesting.com>
Date: Sun, 17 Jul 2016 14:08:24 -0400
Just wondering, why use stubs at first place? What's the advantage compared to LPF or BPFs? Rudy N2WQ Sent using a tiny keyboard. Please excuse brevity, typos, or inappropriate autocorrect. _________
Thats simple $ I have stubs for 40 and 20 and had a total cost of $0.00 Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/17/2016 1:08 PM, Rudy Baka