Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[CQ\-Contest\]\s+40m\s+to\s+20m\s+interference\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[CQ\-Contest\]\s+40m\s+to\s+20m\s+interference\s*$/: 6 ]

Total 6 documents matching your query.

1. [CQ-Contest] 40m to 20m interference (score: 1): Author: William Hendrick via CQ-Contest <cq-contest@contesting.com>; Date: Wed, 22 Jan 2020 23:00:29 +0000 (UTC); I have a lot of interference on 20m when TXing on 40m even with BPF on each K3 running 100w. A 23' shorted stub at the 40m rig doesn't seem to help. Both antennas are Butternut verticals about 150' a; /archives//html/CQ-Contest/2020-01/msg00260.html (6,931 bytes)
2. Re: [CQ-Contest] 40m to 20m interference (score: 1): Author: Jim Brown <k9yc@audiosystemsgroup.com>; Date: Wed, 22 Jan 2020 15:29:54 -0800; Hi Bill, This sort of issue is one of many addressed in this talk I've done at Visalia, to NCCC, and a few other local clubs. http://k9yc.com/Multi-Station.pdf 73, Jim K9YC On 1/22/2020 3:00 PM, Will; /archives//html/CQ-Contest/2020-01/msg00262.html (8,316 bytes)
3. Re: [CQ-Contest] 40m to 20m interference (score: 1): Author: donovanf@starpower.net; Date: Wed, 22 Jan 2020 19:06:06 -0500 (EST); Hi Bill, Please describe the interference you're experiencing, you described it only as "a lot of interference" Is the interference only directly on the second harmonic of the 40 meter transmitter or; /archives//html/CQ-Contest/2020-01/msg00263.html (8,266 bytes)
4. Re: [CQ-Contest] 40m to 20m interference (score: 1): Author: Jeff Blaine <KeepWalking188@ac0c.com>; Date: Wed, 22 Jan 2020 19:32:33 -0600; Bill, There is no such thing as an easy answer on this. But with a bit of study, you can get a handle on the issue and the magnitude of the fix needed. I would recommend you track down the W2VJN bo; /archives//html/CQ-Contest/2020-01/msg00264.html (8,319 bytes)
5. Re: [CQ-Contest] 40m to 20m interference (score: 1): Author: Edward Sawyer <EdwardS@sbelectronics.com>; Date: Thu, 23 Jan 2020 04:45:21 -0500; Jeff, 150ft of separation is plenty for 100W and 40M/20M 2 radio operation. You will hear the 2nd harmonic on 20M when transmitting on 40M. But that harmonic shouldnt be higher than S9+40db and it sh; /archives//html/CQ-Contest/2020-01/msg00268.html (10,300 bytes)
6. Re: [CQ-Contest] 40m to 20m interference (score: 1): Author: john@kk9a.com; Date: Thu, 23 Jan 2020 06:16:58 -0600; You're not asking too much. One of my homebrew 20m beams has a 40m OptiBeam interlaced on the same boom and at 100 watts there is no 20m interference at all except right on the harmonic. Make sure th; /archives//html/CQ-Contest/2020-01/msg00270.html (8,199 bytes)

Current List: 1 - 6
Page: [1]