Author: Pete Smith <n4zr@contesting.com> (Pete Smith)
Date: Wed, 01 Dec 1999 18:23:45 +0000
At a hamfest a couple of months ago, a guy was selling some neat split ferrite beads. The idea is a little like the snap-on rectangular ferrites that Radio Shack et al were selling, except that these
Author: Charles T Johnston" <ctj92@primenet.com (Charles T Johnston)
Date: Wed, 1 Dec 1999 11:49:00 -0700
I have had great success with low-cost band pass filters from InDuComm. They have been low-cost and very effective. They also sell a full line of TVI related filters which I have had no reason so far
Author: EDWARDS, EDDIE J" <eedwards@oppd.com (EDWARDS, EDDIE J)
Date: Wed, 1 Dec 1999 16:38:08 -0600
[Ed-K0iL] Radio Shack does sell both types of ferrites: split bead snap-on in a white plastic case, and rectangular core wind-on type in black plastic that you mentioned. Both are in the 273-series
The stuff Radio Shack sells is Type 43. That's not what you want to use for HF attenuation. I think this sort of thing is what give ferrites a bad name. Type 43 is better for probably 20 MHz up to a
Author: EDWARDS, EDDIE J" <eedwards@oppd.com (EDWARDS, EDDIE J)
Date: Thu, 2 Dec 1999 09:18:47 -0600
[Ed-K0iL] I disagree Jon. I have not found 77 mix to work very good at all across the HF bands where 43 mix almost always has worked for me. This is all very anecdotal, but the numbers that the Palo
In regard to stereo set RFI, I have found that the I.C.E. "stereo RFI filters" work wonders. These filter come in several different styles to meet specific needs. Model 463 for 100 watts or less ster
The material though in the split ferrites and so forth that you can buy from Radio Shack are not type 43. They are designed more for attenuating VHF energy which would probably make them type 61 or 6
Author: Charles T Johnston" <ctj92@primenet.com (Charles T Johnston)
Date: Thu, 2 Dec 1999 18:31:41 -0700
I had great success eliminating TVI in my home ( on a cable TV system) by placing 2 of the Radio Shack snap-on ferrites at the RG59 coax input to the TV. Prior to that I was unable to run 15M or 17M
Author: EDWARDS, EDDIE J" <eedwards@oppd.com (EDWARDS, EDDIE J)
Date: Fri, 3 Dec 1999 10:30:05 -0600
[Ed-K0iL] Be careful with which application that frequency specified relates to. Ferrite's (toroid, split, etc.) are used for many applications. Not just EMI suppression. I recall looking at the Fai
Author: George K. Watson" <watson@epiloglaser.com (George K. Watson)
Date: Fri, 3 Dec 1999 09:47:10 -0700
Also there are many other factors that need to be considered. If you are trying to keep rf currents off of a line carrying significant DC current, you need a proportionally larger amount of the chose
Author: George K. Watson" <watson@epiloglaser.com (George K. Watson)
Date: Fri, 3 Dec 1999 09:51:38 -0700
So there ya go. I noticed Ferronics uses "Letters" to represent the material type so apparently the numbers like 43, 77 an so on are not universal. B & T material is used for noise (signal) suppressi
Well, I just found some of the paperwork from my order from Amidon on ferrite material. Type 77 is indeed what I bought and what Earl at Amidon recommended for frequencies up to 30 MHz. I have the la
Author: Charles T Johnston" <ctj92@primenet.com (Charles T Johnston)
Date: Fri, 3 Dec 1999 18:08:48 -0700
Can anyone actually pin down the material type from data sheets or tests of the Radio Shack snap-on ferrites? I have seen a couple opinions posted about them as to type of material but no real solid