I have problem with R.F interference from linear amplifier or antenna to pll unit. I believe that i have ground loops. I have read some relative articles: http://www.radioworks.com/nbgnd.html http://
Both of these references are way off base. I strongly suggest that you study my RFI tutorial, paying careful attention to the discussion of "the pin 1 problem" and the discussion of ferrite chokes. I
ORIGINAL MESSAGE: REPLY: For what it's worth - I have found ferrites to be all but useless at HF for preventing RFI, even when used in large numbers. I have had much better success with powdered iron
Interesting. So I guess the question is "why?" Why would powdered metal work better? Is it more lossy at HF? cheers Dave G0OIL For what it's worth - I have found ferrites to be all but useless at H
Check out K9YC Jim Brown's page here. He's done a lot of work on this subject. http://www.audiosystemsgroup.com/K9YC/K9YC.htm The specific type of ferrite is critical. The front runner for low HF (wh
Study http://audiosystemsgroup.com/RFI-Ham.pdf 73, Jim K9YC _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
Both of these references are way off base. I strongly suggest that you study my RFI tutorial, paying careful attention to the discussion of "the pin 1 problem" and the discussion of ferrite chokes. I
Two common misconceptions about toroids and rfi: 1) 'Ferrite' and powdered iron are very different materials although lots of guys incorrectly just say 'ferrite'. The important thing for our purposes
Ive used ferrites here for all sorts of RFI problems over the past 30 years or so; speaker leads, keyboards, monitors, telephones, touch and CFL lamps, common mode chokes on both ends of feedlines, a
thank you very much! so material #43 ferrite is improper? i have not other material. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/
Nope. Most consumer and semi-pro audio and video products, and virtually ALL ham and computer products have pin 1 problems at every audio input and output. The good news is that most PRO audio mfrs h
Read this. http://www.audiosystemsgroup.com/CoaxChokesPPT.pdf Good luck! 73, Jeff ACØC www.ac0c.com --Original Message-- From: tzikas tzik Sent: Tuesday, October 26, 2010 11:28 AM To: Carl Cc: amps@c
Study my tutorial, previously cited. There are good uses for #43 if it is used properly (that is, with a sufficient number of turns to match the operating frequency). One of the great virtues of Fair
They are actually quite easy to buy in the UK, Europe and many other countries. The real point is that when international shipping costs, taxes and other mark-ups have been added, Fair-Rite products
Fairite 43 mix is very good at HF as long as you use the correct size and amount. Try to contact W3JN at the Athens US Embassy, maybe he can help with getting what you need shipped from the USA. If n
ORIGINAL MESSAGE: REPLY: I know every situation is different, but over the years I have used literally dozens of those "snap-on" ferrites with almost no success at all. I have tried both the two-piec
The mix is THE issue. The permeability of the type 6 powder is microscopic by comparison to type 31 at low HF. Get some type 31 material and it will swat those RFI flys like they were nothing. The ne
ORIGINAL MESSAGE: REPLY: Good info, thanks Jeff. I shall keep your email on file for the next time. 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.co
Bill, It really works. You have seen my antenna configuration and power preferences. So I can say without exaggeration that I have more personal real-life experience on this than most. ha ha ha. 73,
When the Snap Ons first came via Yuri in Canada out they were a 43 type of mix. Soon RatShak and others copied them and they were reportedly somewhere around a 61 mix. Ive never used them and have no