I don't even have a Yahoo email address. Cortland address, need to see which lists will need to be changed. _______________________________________________ RFI mailing list RFI@contesting.com http://
This suggests your problem is in the computer's internet access. Cortland KA5S _______________________________________________ RFI mailing list RFI@contesting.com http://lists.contesting.com/mailman/
Ten Tec back in the analog days warned users to keep transceiver power supplies away from the rigs, as the radiated magnetic fields would frequency modulate the PTO's. I had a Triton II that would sl
There are other regulators who are supposed to enforce Part 15, EN 5022, and the like and protect radio listeners. I worked in electromagnetic compatibility and a number of companies and in several d
--"One solution that seems to have been ignored, up until now, is to set the class-D switching frequency above the AM band. It virtually eliminates the problem. On that front, Texas Instruments has i
Hi, gents. Cortland here, KA5S. I had about a 30 year career in EMC engineering, and often had to locate specific sources of EMI. A quite small loop will do very well if one is in close proximity to
Great Don. Thanks for the info. I just constructed a 3" diameter loop (not tuned) using some pretty rigid RG58U, and will try it along with a 6" diameter tuned loop (adjustable between 20 and 30 MHz)
That's great, Don. The big advantage with getting up close with a magnetic loop is that the H field increases quite rapidly as you approach the conductor, so you won't need as much sensitivity and yo
I've tried loops in a variety of configurations, shielded, unshielded, balanced and unbalanced, but when I could get close to the H field source, shielding and balance really weren't a problem. I've
And even if each WERE FCC Class A compliant, together, they could -- switching synchronously -- far exceed the limit. A cheap switcher might lock to noise on a common power source, whether generated
Do post the ratings on the "FCC Approved" transformer; there may be less expensive substitutes. Cortland ka5s We had a couple of task lights installed. They are 12 volt high-intensity incandescent li
Ohhhh-Kay now: From FCC Part 2: §2.815 External radio frequency power amplifiers. (a) As used in this part, an external radio frequency power amplifier is any device which, (1) when u
This is an issue we lost in the BPL fight; when radiating conductors are long in wavelength, the transformation from near to far fields occurs at greater distance than would be expected of a point
BPL was common mode for at least one horizontal conductor and (I don't have access to the data) not a source, (arcing insulator, etc) local to the pole/tower ground; at OUR frequencies; given the i
Ed will remember the AT&T modems on 80 meters. I had good luck tracking them down in Petaluma and locating each one to specific rooms in a development of single-story duplexes. It was Super Bowl Sun
When I got to VN in 1965 our Avionics detachments at Tan Son Nhut AB were issued made in Japan toolboxes with screwdrivers that rusted, pliers that wouldn't close all the way and wire cutters that di
Amen. I spent about five years at DSC's (later Alcatel USA's) Petaluma campus, where I had EMC oversight of projects in R&D. How I got that position is pertinent; I was originally slotted for the Te