On 6/17/2014 10:35 PM, Kimo C Chun wrote: If you're looking for log periodic yagi that covers amateur frequencies I just happened to pick up a QST, June 2013, pg. 56 "Short Takes" column by Steve For
Which number of elements on VHF is considered adequate? 3-el 4-el 5-el 6-el 7-el If an antnna is short enough to be easy to carry, it's probablly too short to nail down a source. That sounds flippant
That is what it looks like, although we might better say that the smaller antennas needed or present at higher frequencies intercept less energy due to their smaller size. This affects path loss, bec
Had a similar thing happen at the Tandy Center in Fort Worth not long after we moved into our new R&D building. The security guards set off the smoke detector in the printer room when they reported a
And then there's the NEC and safety: http://view.officeapps.live.com/op/view.aspx?src=http%3A%2F%2Fregulatorydesign.com%2FIs%2520NRTL%2520Marking%2520Required%2520by%2520Law.doc _____________________
On 7/30/2014 6:41 PM, n0tt1@juno.com wrote: I would*suggest* a registered letter be sent to whoever is in charge and address your (and other local hams!) concerns regarding the possible RFI. Do get t
They need to look at http://www.fcc.gov/encyclopedia/oet-reports Or (heh!) these: http://www.rigpix.com/cbfreeband/sony_icbr5.htm and http://radiofreeq.wordpress.com/2013/07/01/survivalist-ssb-cb-fre
Ja, war ganz upgefuckt geworden sein. (NOT quite German) Cortland _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/listinfo/rfi
Let's not get too focused on which receiver has the best sound or S-meter; MY RFI hunting has almost all been with loops or yagis -- and by ear. Often enough, for the last few hundred meters or so, I
On 10/1/2014 7:26 AM, David Cole wrote: Hi, Can you ask them if it is FCC part 15 certified? See what they say...:) -- Thanks and 73's, Found in a Web search; note clams for EMC filtering (bold face
A similar problem was dogging some early (CAM) ADSL we tested at Alcatel back "when" and and it turned out to be RF noise (*microvolt* levels) on the wallwart power cords. I fixed it in a loaned ADSL
Dale, k9vuj I had a bad Neutral on the line powering my Avionics shop in Vietnam ca 1969 and one symptom was a glowing light bulb connected between the shop "ground" and a ground stake. It's a bad id
On 1/15/2015 8:35 PM, donovanf@starpower.net wrote (quoting the NEC): A separate grounding conductor to each ground rod shall be utilized Huh? I can't imagine that a home with a ring system of (say)
On 2/7/2015 5:48 PM, David Cole wrote: Hunting RFI is like pealing an Onion, you remove one layer, only to find another.. I used to tell managers and coworkers that FIXING RFI is like a bucket; you c
Power Line Filter 3Phase 36Amp Neutral Lines I recall seeing a formula for derating a 3-phase filter for single-phase use; divide the current rating by the square root of three. I have a 200 A 3-phas
Kurt *Origins:* Those in the telecommunications industry have known the "cooked telephone man" legend for many a year now it's a perennial tale among them. One of our correspondents recalls hearing i
Some years ago, I worked for a telecommunication manufacturer (DSC Communications, later Alcatel USA) who made digital loop carrier equipment. One of our projects was a carrier-less AM ADSL line card
On 5/11/2015 5:41 PM, Fred - NA2U wrote: Range is under warranty so I can't just go in and start adding toroids, etc. Have any of you had this problem with this range? An RFI problem with a GE produc
The long and short of it is that the city had not even thought about Part 15/18 compliance, but when they looked, the lights were compliant LED stop lights, however, have been known interferers for s
A local Batteries Plus Bulbs outlet has a number of "commercial use only" ballasts for sale. Cortland Richmond KA5S Michigan _______________________________________________ RFI mailing list RFI@conte